Marine Weather and Tide Forecast for Irondequoit, NY
 | Sunrise 7:19 AM Sunset 7:17 PM Moonrise 5:18 AM Moonset 3:47 PM |
Marine Forecasts
NOTE: Zones were updated 3/20/2025. If your report is out of date, please click Edit
LOZ043 Hamlin Beach To Mexico Bay Along Lake Ontario Including Irondequoit Bay- 405 Pm Edt Mon Mar 16 2026
.small craft advisory in effect until 11 pm edt this evening - .
.gale warning in effect from 11 pm edt this evening through Tuesday evening - .
Tonight - West winds to 30 knots becoming southwest and increasing to 35 knot gales after midnight. Snow, rain and sleet this evening, then snow after midnight. Waves 5 to 8 feet building to 10 to 14 feet. Waves occasionally around 18 feet.
Tuesday - West gales to 35 knots diminishing to 30 knots in the afternoon. A chance of snow showers in the morning, then lake effect snow showers in the afternoon. Waves 13 to 18 feet subsiding to 12 to 16 feet. Waves occasionally around 23 feet.
Tuesday night - West winds to 30 knots diminishing to 10 to 15 knots. Lake effect snow showers. Waves 10 to 14 feet subsiding to 4 to 7 feet. Waves occasionally around 18 feet.
Wednesday - West winds 5 to 10 knots becoming south. Snow showers in the morning. Waves 2 to 4 feet subsiding to 1 foot or less.
Wednesday night - Southeast winds 5 to 15 knots becoming south 15 to 20 knots. Mostly cloudy. Waves 2 feet or less.
Thursday - South winds 15 to 20 knots becoming west 10 to 15 knots. A chance of rain showers during the day, then a chance of rain and snow showers Thursday night. Waves 2 feet or less building to 3 to 5 feet. Waves occasionally around 6 feet.
Friday - West winds 5 to 15 knots becoming north and increasing to 15 to 25 knots. A chance of rain and snow showers. Waves 3 to 5 feet building to 3 to 6 feet. Waves occasionally around 7 feet.
Saturday - North winds 15 to 25 knots becoming west to 30 knots. A chance of rain and snow showers. Waves 5 to 8 feet building to 6 to 9 feet. Waves occasionally around 11 feet.
the water temperature off rochester is 38 degrees.
the water temperature off rochester is 38 degrees.
LOZ005
No data
No data
7 Day Forecast for Marine Location Near Irondequoit, NY
NEW! Add second zone forecast
FXUS61 KBUF 161800 AFDBUF
Area Forecast Discussion National Weather Service Buffalo NY 200 PM EDT Mon Mar 16 2026
WHAT HAS CHANGED
All High Wind Warnings have been downgraded to Wind Advisories, with the Wind Advisories extended through Tuesday morning.
The Winter Weather Advisory has been upgraded to a Lake Effect Snow Warning east of Lake Ontario from tonight through early Wednesday morning.
A Winter Weather Advisory has been issued for the rest of the area.
KEY MESSAGES
1) Gusty winds will continue through Tuesday morning.
2) Cold weather will return tonight with a period of accumulating snow and blowing snow areawide, with enough snow to impact travel.
3) Lake effect snow will develop late tonight and continue through early Wednesday morning, mainly east of Lake Ontario.
4) Several weak systems late this week to bring light rain or snow.
DISCUSSION
KEY MESSAGE 1...Gusty winds will continue through Tuesday morning.
Multiple cold frontal segments will continue to move east across the eastern Great Lakes this afternoon and early evening. Each frontal boundary may produce brief advisory criteria gusts in the 45-55 mph range.
There will likely be a lull in winds this evening following the final cold frontal segment, especially across inland areas away from the lake plains. Overnight through early Tuesday morning, another 45-50 knot speed max in the boundary layer will cross the eastern Great Lakes. Strong cold advection will steepen low level lapse rates sufficiently to allow for good mixing through the boundary layer, and this should translate into another round of 45-50 mph gusts overnight through Tuesday morning. The area of peak gusts will develop first on the lake plains, then spread inland across the western Southern Tier and western Finger Lakes through the early morning hours on Tuesday.
All High Wind Warnings have been downgraded to a Wind Advisory, with the potential for warning criteria downslope winds now over. A Wind Advisory has been extended through 15Z Tuesday for the entire CWA for the multiple rounds of Advisory criteria gusts.
KEY MESSAGE 2...Cold weather will return tonight with a period of accumulating snow and blowing snow areawide, with enough snow to impact travel.
A strong full latitude trough will mature over the central and eastern CONUS tonight, with a strong surface low tracking from the central Great Lakes to western Quebec. The mid level trough will begin to take on a negative tilt by this evening, with the cold front becoming more anabatic in nature. A baroclinic wave will ripple north along the slowing cold front through the first half of tonight, with increasing low/mid level frontogenesis along and west of the frontal zone. The increasing frontogenetic forcing will be topped by strong forcing from a mid level shortwave and upper level jet dynamics, resulting in a period of deep layer ascent across the eastern Great Lakes.
Rain will change to snow rapidly from west to east late this afternoon through mid evening. There may be a brief period of sleet during the transition as a wedge of low level cold air undercuts the frontal zone aloft. There may even be a period of freezing rain across the Tug Hill Plateau.
The strong forcing will likely support a period of accumulating snow across most of the region through the first half of tonight. Much of the snow will likely fall in a short period of time as a burst of heavy, wet snow develops this evening. Expect accumulations in the 2- 4"/3-5" range for much of the area, with the greatest accumulations across higher terrain. While snow amounts will not be overly impressive, a sharp temperature drop may result in a flash freeze scenario, and gusty winds will produce blowing/drifting snow overnight as temperatures continue to drop, and snow becomes lower density. With this in mind, a Winter Weather Advisory has been issued for much of the area.
The synoptic snow will rapidly diminish from west to east overnight as the frontal wave moves northeast and away from the area, and a mid level dry slot moves into the eastern Great Lakes.
KEY MESSAGE 3...Lake effect snow will develop late tonight and continue through early Wednesday morning, mainly east of Lake Ontario.
Following the widespread snow from the frontal wave, our attention turns back to the mesoscale with lake effect snow developing by late tonight. Overall, the setup looks much more favorable off of Lake Ontario than Lake Erie, with better moisture and higher inversion heights.
Off Lake Ontario...
Lake effect snow will begin to develop on southwest flow by late tonight across the Thousand Islands region. Lake induced equilibrium levels will rise to near 10K feet by Tuesday morning, then remain there through Tuesday evening before rapidly dropping Wednesday as drier air and high pressure build into the eastern Great Lakes.
The band of snow will intensify Tuesday morning and move southeast across Jefferson County, then drift farther south across the Tug Hill Plateau through the day, reaching Oswego County by late afternoon or early evening. Snowfall rates may reach 2+ inches per hour at times. The high March sun angle may disrupt band organization during the midday through early evening hours as strong diurnal mixing interferes with the convergence structures supporting the band.
Tuesday night, WNW boundary layer flow will direct a band of locally heavy snow across central and southern Oswego County and far northern Cayuga County. Snowfall rates may again reach 2+ inches per hour in the most intense band. The band will weaken rapidly late Tuesday night and Wednesday morning as high pressure builds into the eastern Great Lakes.
Expect localized max accumulations of 6-12" across the Tug Hill Plateau and also across central/southern Oswego County and far northern Cayuga County. The rest of the area east of Lake Ontario will see 3-5" from a combination of synoptic snow tonight and then lake effect snow thereafter. Given the expected snow amounts, upgraded the eastern Lake Ontario region to a Lake Effect Snow Warning.
Off Lake Erie...
Lake induced equilibrium levels will rise to 7-8K feet tonight through Tuesday before falling Tuesday night. Overall, less moisture, weaker synoptic scale support, and shorter fetch will keep the Lake Erie lake snow weaker. The best banding will likely focus just south of the area across NW PA late tonight through Tuesday.
Expect additional accumulations of a spotty few inches late tonight through Tuesday across the higher terrain of the western Southern Tier following the synoptic snow.
Winds will remain gusty through Tuesday, with blowing and drifting snow in lake effect areas.
KEY MESSAGE 4...Several weak systems late this week to bring light rain or snow.
Several troughs in the mean flow, these riding over the dome of heat/ridge in the Southwest will advance across the Great Lake region late this week. The progressive nature of these waves will limit overall precipitation with each event. Thermal profiles are near the rain/snow point, with likely snow for the higher terrain, while a rain snow mix is possible for lower elevations. The last of these waves on Sunday night may draw a deeper cold airmass southward...leading to a cool start for next work week.
AVIATION /18Z MONDAY THROUGH SATURDAY/
For the 18Z TAFS a cold front currently across the Genesee Valley will bring a narrow line of showers to our eastern region this afternoon, in addition to a quick burst of wind.
Behind this front winds will veer to southwest and westerly through the night, with gusts remaining around 40 knots downwind of Lake Erie (KBUF/KIAG/KROC) and also downwind of Lake Ontario (KART)...with gusts 30 to 35 knots elsewhere.
Also behind this front a much colder airmass will advance across the TAF region, with rain showers changing to snow before ending. A wave of low pressure riding along this front, will bring a period of snow to our region this evening and overnight...with visibilities lowering to IFR/LIFR. As temperatures drop below freezing snow will begin to blow in these still strong winds, lowering visibilities.
While snow and poor visibilities will ease between 08Z and 12Z for KBUF/KIAG and KROC, upslope and lake effect processes will continue the snow and IFR or lower visibilities near KJHW and KART through the end of the TAF cycle.
Winds will slowly diminish Tuesday with gusts still around 30 knots at the end of the TAF cycle.
Outlook...
Tuesday afternoon through Wednesday.. MVFR/IFR with chances for snow east and then southeast of both lakes. Breezy. Any IFR conditions will be localized to within lake effect snow bands.
Thursday.. MVFR/IFR with a few rain or snow showers.
Friday.. MVFR/VFR with a chance for rain showers.
Saturday...Mainly VFR.
MARINE
A strong cold front will continue to advance across Lake Ontario this afternoon with southwest-west winds ramping up and persist at gale force on the eastern end of Lake Erie through tonight and across Lake Ontario through Tuesday.
Winds will diminish through mid-week bringing a period of light winds and small waves. Ice on Lake Erie has retracted to now just along the Erie county shoreline.
BUF WATCHES/WARNINGS/ADVISORIES
NY...Wind Advisory until 11 AM EDT Tuesday for NYZ001>006-010>014- 019>021-085.
Winter Weather Advisory from 6 PM this evening to 4 AM EDT Tuesday for NYZ001-002-010>012-085.
Winter Weather Advisory from 8 PM this evening to 4 AM EDT Tuesday for NYZ003-004-013-014-021.
Lake Effect Snow Warning from 9 PM this evening to 8 AM EDT Wednesday for NYZ005-006.
Wind Advisory until 11 AM EDT Tuesday for NYZ007-008.
Lake Effect Snow Warning from 9 PM this evening to 8 PM EDT Tuesday for NYZ007-008.
Winter Weather Advisory from 6 PM this evening to 8 PM EDT Tuesday for NYZ019-020.
MARINE...Small Craft Advisory until 11 AM EDT Tuesday for LEZ020.
Gale Warning until 8 AM EDT Tuesday for LEZ040-041.
Small Craft Advisory until 11 AM EDT Tuesday for LOZ030.
Small Craft Advisory until 5 PM EDT this afternoon for LOZ042.
Gale Warning from 5 PM this afternoon to 11 AM EDT Tuesday for LOZ042-062.
Small Craft Advisory until 11 PM EDT this evening for LOZ043>045.
Gale Warning from 11 PM this evening to 7 PM EDT Tuesday for LOZ043>045-063>065.
Area Forecast Discussion National Weather Service Buffalo NY 200 PM EDT Mon Mar 16 2026
WHAT HAS CHANGED
All High Wind Warnings have been downgraded to Wind Advisories, with the Wind Advisories extended through Tuesday morning.
The Winter Weather Advisory has been upgraded to a Lake Effect Snow Warning east of Lake Ontario from tonight through early Wednesday morning.
A Winter Weather Advisory has been issued for the rest of the area.
KEY MESSAGES
1) Gusty winds will continue through Tuesday morning.
2) Cold weather will return tonight with a period of accumulating snow and blowing snow areawide, with enough snow to impact travel.
3) Lake effect snow will develop late tonight and continue through early Wednesday morning, mainly east of Lake Ontario.
4) Several weak systems late this week to bring light rain or snow.
DISCUSSION
KEY MESSAGE 1...Gusty winds will continue through Tuesday morning.
Multiple cold frontal segments will continue to move east across the eastern Great Lakes this afternoon and early evening. Each frontal boundary may produce brief advisory criteria gusts in the 45-55 mph range.
There will likely be a lull in winds this evening following the final cold frontal segment, especially across inland areas away from the lake plains. Overnight through early Tuesday morning, another 45-50 knot speed max in the boundary layer will cross the eastern Great Lakes. Strong cold advection will steepen low level lapse rates sufficiently to allow for good mixing through the boundary layer, and this should translate into another round of 45-50 mph gusts overnight through Tuesday morning. The area of peak gusts will develop first on the lake plains, then spread inland across the western Southern Tier and western Finger Lakes through the early morning hours on Tuesday.
All High Wind Warnings have been downgraded to a Wind Advisory, with the potential for warning criteria downslope winds now over. A Wind Advisory has been extended through 15Z Tuesday for the entire CWA for the multiple rounds of Advisory criteria gusts.
KEY MESSAGE 2...Cold weather will return tonight with a period of accumulating snow and blowing snow areawide, with enough snow to impact travel.
A strong full latitude trough will mature over the central and eastern CONUS tonight, with a strong surface low tracking from the central Great Lakes to western Quebec. The mid level trough will begin to take on a negative tilt by this evening, with the cold front becoming more anabatic in nature. A baroclinic wave will ripple north along the slowing cold front through the first half of tonight, with increasing low/mid level frontogenesis along and west of the frontal zone. The increasing frontogenetic forcing will be topped by strong forcing from a mid level shortwave and upper level jet dynamics, resulting in a period of deep layer ascent across the eastern Great Lakes.
Rain will change to snow rapidly from west to east late this afternoon through mid evening. There may be a brief period of sleet during the transition as a wedge of low level cold air undercuts the frontal zone aloft. There may even be a period of freezing rain across the Tug Hill Plateau.
The strong forcing will likely support a period of accumulating snow across most of the region through the first half of tonight. Much of the snow will likely fall in a short period of time as a burst of heavy, wet snow develops this evening. Expect accumulations in the 2- 4"/3-5" range for much of the area, with the greatest accumulations across higher terrain. While snow amounts will not be overly impressive, a sharp temperature drop may result in a flash freeze scenario, and gusty winds will produce blowing/drifting snow overnight as temperatures continue to drop, and snow becomes lower density. With this in mind, a Winter Weather Advisory has been issued for much of the area.
The synoptic snow will rapidly diminish from west to east overnight as the frontal wave moves northeast and away from the area, and a mid level dry slot moves into the eastern Great Lakes.
KEY MESSAGE 3...Lake effect snow will develop late tonight and continue through early Wednesday morning, mainly east of Lake Ontario.
Following the widespread snow from the frontal wave, our attention turns back to the mesoscale with lake effect snow developing by late tonight. Overall, the setup looks much more favorable off of Lake Ontario than Lake Erie, with better moisture and higher inversion heights.
Off Lake Ontario...
Lake effect snow will begin to develop on southwest flow by late tonight across the Thousand Islands region. Lake induced equilibrium levels will rise to near 10K feet by Tuesday morning, then remain there through Tuesday evening before rapidly dropping Wednesday as drier air and high pressure build into the eastern Great Lakes.
The band of snow will intensify Tuesday morning and move southeast across Jefferson County, then drift farther south across the Tug Hill Plateau through the day, reaching Oswego County by late afternoon or early evening. Snowfall rates may reach 2+ inches per hour at times. The high March sun angle may disrupt band organization during the midday through early evening hours as strong diurnal mixing interferes with the convergence structures supporting the band.
Tuesday night, WNW boundary layer flow will direct a band of locally heavy snow across central and southern Oswego County and far northern Cayuga County. Snowfall rates may again reach 2+ inches per hour in the most intense band. The band will weaken rapidly late Tuesday night and Wednesday morning as high pressure builds into the eastern Great Lakes.
Expect localized max accumulations of 6-12" across the Tug Hill Plateau and also across central/southern Oswego County and far northern Cayuga County. The rest of the area east of Lake Ontario will see 3-5" from a combination of synoptic snow tonight and then lake effect snow thereafter. Given the expected snow amounts, upgraded the eastern Lake Ontario region to a Lake Effect Snow Warning.
Off Lake Erie...
Lake induced equilibrium levels will rise to 7-8K feet tonight through Tuesday before falling Tuesday night. Overall, less moisture, weaker synoptic scale support, and shorter fetch will keep the Lake Erie lake snow weaker. The best banding will likely focus just south of the area across NW PA late tonight through Tuesday.
Expect additional accumulations of a spotty few inches late tonight through Tuesday across the higher terrain of the western Southern Tier following the synoptic snow.
Winds will remain gusty through Tuesday, with blowing and drifting snow in lake effect areas.
KEY MESSAGE 4...Several weak systems late this week to bring light rain or snow.
Several troughs in the mean flow, these riding over the dome of heat/ridge in the Southwest will advance across the Great Lake region late this week. The progressive nature of these waves will limit overall precipitation with each event. Thermal profiles are near the rain/snow point, with likely snow for the higher terrain, while a rain snow mix is possible for lower elevations. The last of these waves on Sunday night may draw a deeper cold airmass southward...leading to a cool start for next work week.
AVIATION /18Z MONDAY THROUGH SATURDAY/
For the 18Z TAFS a cold front currently across the Genesee Valley will bring a narrow line of showers to our eastern region this afternoon, in addition to a quick burst of wind.
Behind this front winds will veer to southwest and westerly through the night, with gusts remaining around 40 knots downwind of Lake Erie (KBUF/KIAG/KROC) and also downwind of Lake Ontario (KART)...with gusts 30 to 35 knots elsewhere.
Also behind this front a much colder airmass will advance across the TAF region, with rain showers changing to snow before ending. A wave of low pressure riding along this front, will bring a period of snow to our region this evening and overnight...with visibilities lowering to IFR/LIFR. As temperatures drop below freezing snow will begin to blow in these still strong winds, lowering visibilities.
While snow and poor visibilities will ease between 08Z and 12Z for KBUF/KIAG and KROC, upslope and lake effect processes will continue the snow and IFR or lower visibilities near KJHW and KART through the end of the TAF cycle.
Winds will slowly diminish Tuesday with gusts still around 30 knots at the end of the TAF cycle.
Outlook...
Tuesday afternoon through Wednesday.. MVFR/IFR with chances for snow east and then southeast of both lakes. Breezy. Any IFR conditions will be localized to within lake effect snow bands.
Thursday.. MVFR/IFR with a few rain or snow showers.
Friday.. MVFR/VFR with a chance for rain showers.
Saturday...Mainly VFR.
MARINE
A strong cold front will continue to advance across Lake Ontario this afternoon with southwest-west winds ramping up and persist at gale force on the eastern end of Lake Erie through tonight and across Lake Ontario through Tuesday.
Winds will diminish through mid-week bringing a period of light winds and small waves. Ice on Lake Erie has retracted to now just along the Erie county shoreline.
BUF WATCHES/WARNINGS/ADVISORIES
NY...Wind Advisory until 11 AM EDT Tuesday for NYZ001>006-010>014- 019>021-085.
Winter Weather Advisory from 6 PM this evening to 4 AM EDT Tuesday for NYZ001-002-010>012-085.
Winter Weather Advisory from 8 PM this evening to 4 AM EDT Tuesday for NYZ003-004-013-014-021.
Lake Effect Snow Warning from 9 PM this evening to 8 AM EDT Wednesday for NYZ005-006.
Wind Advisory until 11 AM EDT Tuesday for NYZ007-008.
Lake Effect Snow Warning from 9 PM this evening to 8 PM EDT Tuesday for NYZ007-008.
Winter Weather Advisory from 6 PM this evening to 8 PM EDT Tuesday for NYZ019-020.
MARINE...Small Craft Advisory until 11 AM EDT Tuesday for LEZ020.
Gale Warning until 8 AM EDT Tuesday for LEZ040-041.
Small Craft Advisory until 11 AM EDT Tuesday for LOZ030.
Small Craft Advisory until 5 PM EDT this afternoon for LOZ042.
Gale Warning from 5 PM this afternoon to 11 AM EDT Tuesday for LOZ042-062.
Small Craft Advisory until 11 PM EDT this evening for LOZ043>045.
Gale Warning from 11 PM this evening to 7 PM EDT Tuesday for LOZ043>045-063>065.
| Stations | Dist | Age | Wind | Air | Water | Waves | inHg | DewPt |
| RPRN6 - Rochester, NY | 0 mi | 80 min | W 17G | 29.12 |
Wind History for Oswego, NY
toggle option: (graph/table)
Link to 1 hour of 5 minute data for KROC
Terminal Aerodrome Forecast (TAF) for KROC
Wind History Graph: ROC
(wind in knots)
GEOS Local Image of north east
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