Marine Weather and Tide Forecast for Groton Long Point, CT
February 17, 2025 5:36 AM EST (10:36 UTC) Change Location
![]() | Sunrise 6:38 AM Sunset 5:26 PM Moonrise 11:43 PM Moonset 9:42 AM |
ANZ332 Long Island Sound East Of The Mouth Of The Connecticut River- 424 Am Est Mon Feb 17 2025
.gale warning in effect through late tonight - .
Today - W winds 25 to 30 kt with gusts up to 45 kt. Seas 5 to 7 ft, occasionally to 9 ft. Wave detail: W 6 ft at 5 seconds and E 3 ft at 10 seconds.
Tonight - W winds 25 to 30 kt with gusts up to 40 kt. Seas 5 to 7 ft, occasionally to 9 ft. Wave detail: W 5 ft at 5 seconds and E 1 ft at 11 seconds. Chance of light freezing spray.
Tue - W winds 20 to 25 kt with gusts up to 30 kt. Seas 3 to 5 ft, occasionally to 6 ft. Wave detail: W 5 ft at 5 seconds. Chance of light freezing spray.
Tue night - W winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft, occasionally to 5 ft. Wave detail: W 4 ft at 5 seconds. Chance of light freezing spray.
Wed - NW winds 15 to 20 kt, diminishing to 10 to 15 kt in the afternoon. Seas 2 to 3 ft. Wave detail: W 3 ft at 4 seconds.
Wed night - NW winds 5 to 10 kt, becoming N after midnight. Seas 1 ft or less. Wave detail: nw 1 ft at 3 seconds. Chance of snow after midnight.
Thu - N winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Snow likely.
Thu night - NW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 3 ft. Chance of snow.
Fri - NW winds around 15 kt with gusts up to 20 kt. Seas 2 to 3 ft.
Fri night - NW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft.
ANZ300 424 Am Est Mon Feb 17 2025
Synopsis for the long island and connecticut coastal waters - Deep low pressure meanders over far southeastern canada today as a strong high drops down into the central us, then gradually building into the region from the west through midweek. An area of low pressure ejects off the southeast coast Wednesday night, passing south and east of the area Thursday. High pressure returns from the west for the end of the week.

NEW! Add second zone forecast
Noank Click for Map Mon -- 06:39 AM EST Sunrise Mon -- 06:44 AM EST 0.23 feet Low Tide Mon -- 08:42 AM EST Moonset Mon -- 12:02 PM EST 1.86 feet High Tide Mon -- 05:24 PM EST Sunset Mon -- 06:51 PM EST 0.24 feet Low Tide Mon -- 10:42 PM EST Moonrise Tide / Current data from XTide NOT FOR NAVIGATION |   |
Noank, Mystic River entrance, Connecticut, Tide feet
12 am |
2.2 |
1 am |
2.1 |
2 am |
1.7 |
3 am |
1.3 |
4 am |
1 |
5 am |
0.6 |
6 am |
0.3 |
7 am |
0.2 |
8 am |
0.5 |
9 am |
1 |
10 am |
1.5 |
11 am |
1.7 |
12 pm |
1.9 |
1 pm |
1.8 |
2 pm |
1.5 |
3 pm |
1.1 |
4 pm |
0.8 |
5 pm |
0.6 |
6 pm |
0.3 |
7 pm |
0.2 |
8 pm |
0.5 |
9 pm |
1 |
10 pm |
1.5 |
11 pm |
1.9 |
The Race Click for Map Mon -- 02:08 AM EST -0.00 knots Slack Mon -- 05:16 AM EST -2.76 knots Max Ebb Mon -- 06:39 AM EST Sunrise Mon -- 08:30 AM EST 0.00 knots Slack Mon -- 08:42 AM EST Moonset Mon -- 11:15 AM EST 2.25 knots Max Flood Mon -- 02:26 PM EST -0.00 knots Slack Mon -- 05:25 PM EST Sunset Mon -- 05:32 PM EST -2.47 knots Max Ebb Mon -- 08:36 PM EST 0.00 knots Slack Mon -- 10:42 PM EST Moonrise Mon -- 11:32 PM EST 2.36 knots Max Flood Tide / Current data from XTide NOT FOR NAVIGATION |   |
The Race, Long Island Sound, New York Current, knots
12 am |
2.1 |
1 am |
1.3 |
2 am |
0.2 |
3 am |
-1.1 |
4 am |
-2.2 |
5 am |
-2.7 |
6 am |
-2.6 |
7 am |
-1.7 |
8 am |
-0.6 |
9 am |
0.6 |
10 am |
1.7 |
11 am |
2.2 |
12 pm |
2.1 |
1 pm |
1.4 |
2 pm |
0.5 |
3 pm |
-0.6 |
4 pm |
-1.7 |
5 pm |
-2.4 |
6 pm |
-2.4 |
7 pm |
-1.7 |
8 pm |
-0.7 |
9 pm |
0.5 |
10 pm |
1.5 |
11 pm |
2.3 |
Area Discussion for New York City/Upton, NY
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FXUS61 KOKX 171027 AFDOKX
Area Forecast Discussion National Weather Service New York NY 527 AM EST Mon Feb 17 2025
SYNOPSIS
Deepening low pressure meanders near the Canadian Maritimes today as a strong high drops down into the Central US. The high gradually builds into the region from the west through midweek. An area of low pressure then ejects off the Southeast coast Wednesday night, passing south and east of the area Thursday. High pressure returns from the west for the end of the week.
NEAR TERM /THROUGH TONIGHT/
Sharply colder today while remaining very gusty. The local effects from a deepening sub 970 mb low continue to be felt as the system occludes and meanders over far southeastern Canada. The result is the continuation of strong, locally damaging, winds across the region. CAA with the flow is ushering in a sharply colder air mass relative to Sunday as well. Afternoon highs today climb little from where they start this morning, topping out within a few degrees of the freezing mark. With the winds, expect wind chill values to remain persistently in the 20s thru the day, if not lower.
Soundings indicate a well mixed boundary layer, mixing to and above 850 mb much of the day. Winds toward the top of this layer are progged near 50 kt, which gives an idea of peak gust potential, with more frequent gusts around 40 kt likely thru the afternoon. Thus, the Wind Advisory remains in effect regionwide until 6 PM this evening. Winds should begin to ease just a bit thereafter, though the gusty west flow continues overnight as strong high pressure slowly builds east from the Central US.
Expect a fair amount of stratocu, and can't rule out a spotty snow streamer from the lakes making into the local Tri State with the strong flow aloft, especially inland. Otherwise, remaining dry thru this period as temps fall back into the teens and 20s.
SHORT TERM /TUESDAY THROUGH TUESDAY NIGHT/
Flow remains strong Tuesday as high pressure builds in from the west.
With the cold air mass entrenched, temperature anomalies run 10 to 15 degrees below normal. After a frigid start with morning temps largely in the teens and wind chills near zero sets up an afternoon likely a few degrees colder than the previous day, with highs generally in the mid to upper 20s and wind chills in the teens.
Dry conditions prevail with the building high under a mix of mid level clouds and sunshine. WNW gusts 30 to 35 mph are expected to persist thru the afternoon, gradually subsiding in the evening and overnight.
LONG TERM /WEDNESDAY THROUGH SUNDAY/
Key Points...
* Lowering chances of a significant winter storm in the Wed night and Thursday timeframe.
* Remaining cold with temperatures running 5 to 10 degrees below normal.
A 1050+ mb Arctic high continues to build in from the west midweek, keeping the region dry to start the period. Though as a baroclinic zone sets up over the South, low pressure develops and deepens as shortwave energy swings through midweek. This low is expected to trek east and eject off the Southeast coast Wednesday night, passing to the south and east of the region into Thursday, before exiting well out to sea.
Global guidance continues to trend farther south and east with this system, lessening the potential of a significant snowfall locally. While the threat has not entirely diminished, 00Z GEFS run offers just 10% of members with a warning level (6 in+) snow at KISP, and about half the members with at least an inch of snow, lessening further going north and west. Tapered PoPs back a bit in this period to align with forecast trend, but not shutting the door entirely should the expected track shift a bit closer over the next 48 to 72 hours.
The low passes out to sea regardless by late Thursday, and high pressure returns once again from the west. This high remains west of the area through much of the weekend, providing dry but cold conditions.
AVIATION /10Z MONDAY THROUGH FRIDAY/
Deepening low pressure moving into the Canadian Maritimes will become nearly stationary as strong high pressure gradually builds from the west.
BKN VFR cigs expected through much of the day today, with W winds sustained 20-30 kt with gusts 35-45 kt. Cigs scatter and winds slowly diminish after sunset.
...NY Metro (KEWR/KLGA/KJFK/KTEB) TAF Uncertainty...
No unscheduled AMD expected.
OUTLOOK FOR 06Z TUESDAY THROUGH FRIDAY
Late tonight: VFR. W winds G25-30kt.
Tuesday: VFR. W winds G25 kt.
Wednesday: VFR.
Wednesday night: Chance of snow with MVFR or IFR vsby.
Thursday: Snow possible with MVFR/IFR cond. N-NW winds G20-25kt, mainly afternoon/evening.
Friday: VFR. NW winds G20kt.
Detailed information, including hourly TAF wind component forecasts, can be found at: https:/ www.weather.gov/zny/n90
MARINE
Strong winds associated with deep low pressure centered over the Canadian Maritimes persists in the near term.
For the ocean waters, Storm Warning remains in effect for the ocean waters thru this afternoon. Thereafter, gales continue through at least this evening, if not the overnight. Ocean seas 10 to 14 ft today gradually lower into this evening, but remaining above 5 ft thru Tuesday night.
For non ocean waters, Gale Warning on the through this evening, and through into early Tuesday morning for the eastern Long Island Sound, and the eastern Long Island bays. Seas on the Sound 5 to 7 ft today, and up to 5 ft possible on Tuesday before lowering.
With cold air moving in, and the combination of strong winds and high seas, there is also a chance of freezing spray late tonight through Tuesday night. At this time, ice accretion is expected to remain below Advisory criteria, but will continue to monitor conditions should one be needed.
Wind gusts up to 25 kt likely continue on all waters into Tuesday night before subsiding into early Wednesday, bringing a return of sub SCA conditions that could persist into late week depending on the track and strength of offshore low pressure Thursday.
HYDROLOGY
No hydrologic impacts are expected through this week.
TIDES/COASTAL FLOODING
A long duration period of strong offshore westerly flow may cause a few spots to experience low water conditions around the times of low tide into Tuesday evening, mainly along Raritan Bay, the north shore of Nassau and western Suffolk counties, and possibly the bays of Long Island. Water levels are largely expected to remain less than 2 ft below MLLW however, and a Low Water Advisory appears less likely.
OKX WATCHES/WARNINGS/ADVISORIES
CT...Wind Advisory until 6 PM EST this evening for CTZ005>012.
NY...Wind Advisory until 6 PM EST this evening for NYZ067>075- 078>081-176>179.
NJ...Wind Advisory until 6 PM EST this evening for NJZ002-004-006- 103>108.
MARINE...Gale Warning until 6 AM EST Tuesday for ANZ331-332-340.
Gale Warning until midnight EST tonight for ANZ335-338-345.
Storm Warning until 4 PM EST this afternoon for ANZ350-353-355.
Area Forecast Discussion National Weather Service New York NY 527 AM EST Mon Feb 17 2025
SYNOPSIS
Deepening low pressure meanders near the Canadian Maritimes today as a strong high drops down into the Central US. The high gradually builds into the region from the west through midweek. An area of low pressure then ejects off the Southeast coast Wednesday night, passing south and east of the area Thursday. High pressure returns from the west for the end of the week.
NEAR TERM /THROUGH TONIGHT/
Sharply colder today while remaining very gusty. The local effects from a deepening sub 970 mb low continue to be felt as the system occludes and meanders over far southeastern Canada. The result is the continuation of strong, locally damaging, winds across the region. CAA with the flow is ushering in a sharply colder air mass relative to Sunday as well. Afternoon highs today climb little from where they start this morning, topping out within a few degrees of the freezing mark. With the winds, expect wind chill values to remain persistently in the 20s thru the day, if not lower.
Soundings indicate a well mixed boundary layer, mixing to and above 850 mb much of the day. Winds toward the top of this layer are progged near 50 kt, which gives an idea of peak gust potential, with more frequent gusts around 40 kt likely thru the afternoon. Thus, the Wind Advisory remains in effect regionwide until 6 PM this evening. Winds should begin to ease just a bit thereafter, though the gusty west flow continues overnight as strong high pressure slowly builds east from the Central US.
Expect a fair amount of stratocu, and can't rule out a spotty snow streamer from the lakes making into the local Tri State with the strong flow aloft, especially inland. Otherwise, remaining dry thru this period as temps fall back into the teens and 20s.
SHORT TERM /TUESDAY THROUGH TUESDAY NIGHT/
Flow remains strong Tuesday as high pressure builds in from the west.
With the cold air mass entrenched, temperature anomalies run 10 to 15 degrees below normal. After a frigid start with morning temps largely in the teens and wind chills near zero sets up an afternoon likely a few degrees colder than the previous day, with highs generally in the mid to upper 20s and wind chills in the teens.
Dry conditions prevail with the building high under a mix of mid level clouds and sunshine. WNW gusts 30 to 35 mph are expected to persist thru the afternoon, gradually subsiding in the evening and overnight.
LONG TERM /WEDNESDAY THROUGH SUNDAY/
Key Points...
* Lowering chances of a significant winter storm in the Wed night and Thursday timeframe.
* Remaining cold with temperatures running 5 to 10 degrees below normal.
A 1050+ mb Arctic high continues to build in from the west midweek, keeping the region dry to start the period. Though as a baroclinic zone sets up over the South, low pressure develops and deepens as shortwave energy swings through midweek. This low is expected to trek east and eject off the Southeast coast Wednesday night, passing to the south and east of the region into Thursday, before exiting well out to sea.
Global guidance continues to trend farther south and east with this system, lessening the potential of a significant snowfall locally. While the threat has not entirely diminished, 00Z GEFS run offers just 10% of members with a warning level (6 in+) snow at KISP, and about half the members with at least an inch of snow, lessening further going north and west. Tapered PoPs back a bit in this period to align with forecast trend, but not shutting the door entirely should the expected track shift a bit closer over the next 48 to 72 hours.
The low passes out to sea regardless by late Thursday, and high pressure returns once again from the west. This high remains west of the area through much of the weekend, providing dry but cold conditions.
AVIATION /10Z MONDAY THROUGH FRIDAY/
Deepening low pressure moving into the Canadian Maritimes will become nearly stationary as strong high pressure gradually builds from the west.
BKN VFR cigs expected through much of the day today, with W winds sustained 20-30 kt with gusts 35-45 kt. Cigs scatter and winds slowly diminish after sunset.
...NY Metro (KEWR/KLGA/KJFK/KTEB) TAF Uncertainty...
No unscheduled AMD expected.
OUTLOOK FOR 06Z TUESDAY THROUGH FRIDAY
Late tonight: VFR. W winds G25-30kt.
Tuesday: VFR. W winds G25 kt.
Wednesday: VFR.
Wednesday night: Chance of snow with MVFR or IFR vsby.
Thursday: Snow possible with MVFR/IFR cond. N-NW winds G20-25kt, mainly afternoon/evening.
Friday: VFR. NW winds G20kt.
Detailed information, including hourly TAF wind component forecasts, can be found at: https:/ www.weather.gov/zny/n90
MARINE
Strong winds associated with deep low pressure centered over the Canadian Maritimes persists in the near term.
For the ocean waters, Storm Warning remains in effect for the ocean waters thru this afternoon. Thereafter, gales continue through at least this evening, if not the overnight. Ocean seas 10 to 14 ft today gradually lower into this evening, but remaining above 5 ft thru Tuesday night.
For non ocean waters, Gale Warning on the through this evening, and through into early Tuesday morning for the eastern Long Island Sound, and the eastern Long Island bays. Seas on the Sound 5 to 7 ft today, and up to 5 ft possible on Tuesday before lowering.
With cold air moving in, and the combination of strong winds and high seas, there is also a chance of freezing spray late tonight through Tuesday night. At this time, ice accretion is expected to remain below Advisory criteria, but will continue to monitor conditions should one be needed.
Wind gusts up to 25 kt likely continue on all waters into Tuesday night before subsiding into early Wednesday, bringing a return of sub SCA conditions that could persist into late week depending on the track and strength of offshore low pressure Thursday.
HYDROLOGY
No hydrologic impacts are expected through this week.
TIDES/COASTAL FLOODING
A long duration period of strong offshore westerly flow may cause a few spots to experience low water conditions around the times of low tide into Tuesday evening, mainly along Raritan Bay, the north shore of Nassau and western Suffolk counties, and possibly the bays of Long Island. Water levels are largely expected to remain less than 2 ft below MLLW however, and a Low Water Advisory appears less likely.
OKX WATCHES/WARNINGS/ADVISORIES
CT...Wind Advisory until 6 PM EST this evening for CTZ005>012.
NY...Wind Advisory until 6 PM EST this evening for NYZ067>075- 078>081-176>179.
NJ...Wind Advisory until 6 PM EST this evening for NJZ002-004-006- 103>108.
MARINE...Gale Warning until 6 AM EST Tuesday for ANZ331-332-340.
Gale Warning until midnight EST tonight for ANZ335-338-345.
Storm Warning until 4 PM EST this afternoon for ANZ350-353-355.
Stations | Dist | Age | Wind | Air | Water | Waves | inHg | DewPt |
NLHC3 | 8 mi | 49 min | 36°F | 29.45 | ||||
MTKN6 - 8510560 - Montauk, NY | 17 mi | 49 min | 37°F | 29.43 | ||||
QPTR1 - 8454049 - Quonset Point, RI | 37 mi | 49 min | 35°F | 29.41 | ||||
NWPR1 - 8452660 - Newport, RI | 38 mi | 49 min | 38°F | 29.42 | ||||
PDVR1 | 38 mi | 49 min | 29.41 | |||||
NAXR1 - Narragansett Bay Reserve, RI | 42 mi | 52 min | N 8.9 | 29°F | 29.41 | 24°F | ||
PTCR1 - 8452951 - Potter Cove, Prudence Island, RI | 42 mi | 49 min | 29.44 | |||||
CPTR1 - 8452944 - Conimicut Light, RI | 45 mi | 49 min | 35°F | 29.41 | ||||
FOXR1 - 8454000 - Providence, RI | 47 mi | 49 min | 32°F | 29.41 | ||||
PVDR1 | 47 mi | 49 min | 29.42 | |||||
NWHC3 - 8465705 - New Haven, CT | 49 mi | 49 min | 34°F | 29.53 |
Wind History for Quonset Point, RI
toggle option: (graph/table)
Airport Reports
Airport | Dist | Age | Wind kt | Vis | Sky | Weather | Air | DewPt | RH | inHg |
KGON GROTONNEW LONDON,CT | 4 sm | 40 min | W 18G33 | 10 sm | Clear | 28°F | 12°F | 50% | 29.45 | |
KWST WESTERLY STATE,RI | 11 sm | 43 min | W 09G25 | 10 sm | Partly Cloudy | 28°F | 12°F | 50% | 29.45 | |
KMTP MONTAUK,NY | 16 sm | 42 min | W 18G44 | -- | 34°F | 16°F | 47% | 29.49 | ||
KBID BLOCK ISLAND STATE,RI | 24 sm | 40 min | W 31G41 | 10 sm | Clear | 28°F | 16°F | 59% | 29.44 |
Link to 1 hour of 5 minute data for KGON
Terminal Aerodrome Forecast (TAF) for KGON
Wind History Graph: GON
(wind in knots)GEOS Local Image of north east
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