Marine Weather and Tide Forecast for Olcott, NY
April 30, 2025 6:17 AM EDT (10:17 UTC)
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![]() | Sunrise 6:07 AM Sunset 8:16 PM Moonrise 6:47 AM Moonset 11:32 PM |
LOZ042 Niagara River To Hamlin Beach Along Lake Ontario- 845 Pm Edt Tue Apr 29 2025
.small craft advisory in effect until 6 am edt Wednesday - .
Tonight - West winds 15 to 25 knots becoming northwest and diminishing to 10 to 15 knots. A chance of rain showers early. Waves 3 to 6 feet building to 4 to 7 feet, then subsiding to 3 to 6 feet. Waves occasionally around 9 feet.
Wednesday - Northwest winds 5 to 15 knots becoming west. Mostly Sunny. Waves 2 to 4 feet subsiding to 1 foot or less.
Wednesday night - South winds 10 knots or less becoming east. Partly cloudy. Waves 1 foot or less.
Thursday - East winds 5 to 15 knots. Showers likely in the afternoon. Waves 1 to 3 feet.
Thursday night - East winds 10 to 15 knots becoming southwest 15 to 20 knots. Showers with a chance of Thunderstorms. Waves 1 to 3 feet.
Friday - Southwest winds 15 to 20 knots becoming west 10 to 15 knots. Showers likely during the day, then a chance of showers Friday night. Waves 2 to 4 feet building to 3 to 5 feet, then subsiding to 2 to 4 feet. Waves occasionally around 6 feet.
Saturday - Northwest winds 10 to 15 knots becoming west. A chance of showers. Waves 2 to 3 feet.
Sunday - West winds 5 to 15 knots becoming northwest. Becoming mainly clear. Waves 1 to 2 feet.
winds and waves higher in and near Thunderstorms.
winds and waves higher in and near Thunderstorms.
LOZ005
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7 Day Forecast for Marine Location Near Olcott, NY

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Area Discussion for Buffalo, NY
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FXUS61 KBUF 300802 AFDBUF
Area Forecast Discussion National Weather Service Buffalo NY 402 AM EDT Wed Apr 30 2025
SYNOPSIS
Fresh, light northwest winds today with air temperatures much cooler than yesterday, though a good deal of sunshine will be found across the region. The recently departed frontal boundary will lift back northward as a warm front Thursday, ushering in the next round of showers and possible thunderstorms that will remain through Friday.
This warm front will bring a mild start to May, though temperatures will be reduced a bit for the weekend.
NEAR TERM /THROUGH TONIGHT/
Canadian surface high pressure will bring a fresh light breeze across the region today with temperatures a good 25 to 30 degrees cooler than yesterday. Sunshine will temper the chill.
Freezing temperatures are possible east of Lake Ontario tonight with early evening radiational cooling conditions...but increasing clouds across WNY will slow overnight cooling.
SHORT TERM /THURSDAY THROUGH SATURDAY NIGHT/
Warm front lifts north into the region Thursday as low pressure moves northeast into the southern Great Lakes. The low will continue to move northeast into southern Ontario, eventually sending a cold front through the region during the day Friday. Sufficient instability will develop within the warm sector by mid to late Thursday afternoon supporting the development of showers and scattered thunderstorms, especially across western New York. Shear profiles improve courtesy of a 45 knot low level bringing at least a low risk for hail and wind threats into the evening.
The chance for showers and embedded thunderstorms will continue into Friday, as an upper level shortwave trough moves into the region along with the surface cold front extending from the low moving into eastern Canada. Instability and shear profiles not overly impressive, but some gusty thunderstorms are possible during the afternoon, especially across eastern portions of the area. Scattered showers will linger Friday night through Saturday night as the trough passes across the region.
LONG TERM /SUNDAY THROUGH TUESDAY/
Weak cyclonic flow will linger through Sunday, especially across the Northeast will support plenty of diurnal cumulus clouds. Upper level ridging will then build east across the Great Lakes region Monday and Tuesday, supporting a broad surface high and the likelihood for dry weather. However, there continues to remain hints of a cut off low to develop supporting Atlantic moisture to advect into the region, which would lead to a more pessimistic forecast.
AVIATION /08Z WEDNESDAY THROUGH SUNDAY/
For the 06Z TAFS VFR flight conditions are found, with some lower ceiling heights noted near Lake Ontario and the North Country that are associated with a secondary cold front. Northwest flow may bring these clouds across portions of the TAF region this early morning
with bases largely VFR
though the higher terrain of the Southern Tier may experience lower MVFR ceiling heights.
Drier air associated with a surface high pressure crossing the TAF region combined with increasing mixing heights will end the lower ceiling heights with just a few diurnal cumulus through the afternoon hours. Winds will remain light and variable with the passing of the surface high.
Tonight mid and high level clouds will begin to thicken from west to east ahead of the next warm front (storm system) that will bring unsettled weather back to the TAF region after tonight.
Outlook...
Thursday...VFR deteriorating to MVFR/IFR with showers developing.
Chance of thunderstorms.
Friday.. MVFR/IFR with showers likely and a chance of thunderstorms.
Saturday...Mainly VFR with scattered showers.
Sunday...VFR flight conditions.
MARINE
As surface high pressure builds across the Lower Great Lakes today northwest winds will gradually diminish, with wave heights relaxing through the afternoon hours. Light and variable winds this evening with the passing of the surface high.
Easterly winds Thursday will increase over the western waters of Lake Ontario, bringing a slight chop Thursday afternoon before winds veer to southerly and the greater wave heights drift into Canadian waters.
BUF WATCHES/WARNINGS/ADVISORIES
NY...None.
MARINE...Small Craft Advisory until 8 AM EDT this morning for LOZ043>045.
Area Forecast Discussion National Weather Service Buffalo NY 402 AM EDT Wed Apr 30 2025
SYNOPSIS
Fresh, light northwest winds today with air temperatures much cooler than yesterday, though a good deal of sunshine will be found across the region. The recently departed frontal boundary will lift back northward as a warm front Thursday, ushering in the next round of showers and possible thunderstorms that will remain through Friday.
This warm front will bring a mild start to May, though temperatures will be reduced a bit for the weekend.
NEAR TERM /THROUGH TONIGHT/
Canadian surface high pressure will bring a fresh light breeze across the region today with temperatures a good 25 to 30 degrees cooler than yesterday. Sunshine will temper the chill.
Freezing temperatures are possible east of Lake Ontario tonight with early evening radiational cooling conditions...but increasing clouds across WNY will slow overnight cooling.
SHORT TERM /THURSDAY THROUGH SATURDAY NIGHT/
Warm front lifts north into the region Thursday as low pressure moves northeast into the southern Great Lakes. The low will continue to move northeast into southern Ontario, eventually sending a cold front through the region during the day Friday. Sufficient instability will develop within the warm sector by mid to late Thursday afternoon supporting the development of showers and scattered thunderstorms, especially across western New York. Shear profiles improve courtesy of a 45 knot low level bringing at least a low risk for hail and wind threats into the evening.
The chance for showers and embedded thunderstorms will continue into Friday, as an upper level shortwave trough moves into the region along with the surface cold front extending from the low moving into eastern Canada. Instability and shear profiles not overly impressive, but some gusty thunderstorms are possible during the afternoon, especially across eastern portions of the area. Scattered showers will linger Friday night through Saturday night as the trough passes across the region.
LONG TERM /SUNDAY THROUGH TUESDAY/
Weak cyclonic flow will linger through Sunday, especially across the Northeast will support plenty of diurnal cumulus clouds. Upper level ridging will then build east across the Great Lakes region Monday and Tuesday, supporting a broad surface high and the likelihood for dry weather. However, there continues to remain hints of a cut off low to develop supporting Atlantic moisture to advect into the region, which would lead to a more pessimistic forecast.
AVIATION /08Z WEDNESDAY THROUGH SUNDAY/
For the 06Z TAFS VFR flight conditions are found, with some lower ceiling heights noted near Lake Ontario and the North Country that are associated with a secondary cold front. Northwest flow may bring these clouds across portions of the TAF region this early morning
with bases largely VFR
though the higher terrain of the Southern Tier may experience lower MVFR ceiling heights.
Drier air associated with a surface high pressure crossing the TAF region combined with increasing mixing heights will end the lower ceiling heights with just a few diurnal cumulus through the afternoon hours. Winds will remain light and variable with the passing of the surface high.
Tonight mid and high level clouds will begin to thicken from west to east ahead of the next warm front (storm system) that will bring unsettled weather back to the TAF region after tonight.
Outlook...
Thursday...VFR deteriorating to MVFR/IFR with showers developing.
Chance of thunderstorms.
Friday.. MVFR/IFR with showers likely and a chance of thunderstorms.
Saturday...Mainly VFR with scattered showers.
Sunday...VFR flight conditions.
MARINE
As surface high pressure builds across the Lower Great Lakes today northwest winds will gradually diminish, with wave heights relaxing through the afternoon hours. Light and variable winds this evening with the passing of the surface high.
Easterly winds Thursday will increase over the western waters of Lake Ontario, bringing a slight chop Thursday afternoon before winds veer to southerly and the greater wave heights drift into Canadian waters.
BUF WATCHES/WARNINGS/ADVISORIES
NY...None.
MARINE...Small Craft Advisory until 8 AM EDT this morning for LOZ043>045.
Stations | Dist | Age | Wind | Air | Water | Waves | inHg | DewPt |
OLCN6 - Olcott Harbor, NY | 1 mi | 18 min | NW 16G | 30.16 | ||||
YGNN6 - Niagara Coast Guard , NY | 20 mi | 18 min | NNW 12G | 30.14 | ||||
NIAN6 - 9063012 - Niagara Intake, NY | 24 mi | 48 min | 38°F | 30.13 | ||||
BUFN6 - 9063020 - Buffalo, NY | 33 mi | 48 min | W 8.9G | 40°F | 53°F | 30.08 | 34°F | |
45159 - NW Lake Ontario Ajax | 34 mi | 18 min | NW 14G | 37°F | 39°F | 1 ft | 30.15 | |
45139 - West Lake Ontario - Grimsby | 44 mi | 18 min | NNW 5.8G | 40°F | 40°F | 1 ft | 30.16 | |
PSTN6 - 9063028 - Sturgeon Point, NY | 48 mi | 48 min | 41°F | 30.09 |
Wind History for Buffalo, NY
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Terminal Aerodrome Forecast (TAF) for KIAG
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(wind in knots)GEOS Local Image of GreatLakes
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