Groton, CT Marine Weather and Tide Forecast
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Marine Weather and Tide Forecast for Groton, CT

May 17, 2024 8:46 AM EDT (12:46 UTC) Change Location
Sunrise 5:25 AM   Sunset 8:04 PM
Moonrise 2:22 PM   Moonset 2:47 AM 
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NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.

Marine Forecasts
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ANZ330 Long Island Sound East Of New Haven Ct/port Jefferson Ny- 600 Am Edt Tue Mar 30 2021

Today - E winds around 5 kt, becoming S late this morning and afternoon. Seas 1 ft or less.

Tonight - S winds around 10 kt. Seas 1 to 2 ft.

Wed - S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Chance of showers in the morning, then chance of rain in the afternoon.

Wed night - S winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. Rain. Vsby 1 to 3 nm.

Thu - W winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 5 ft. Showers.

Thu night - NW winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 5 ft.

Fri - NW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft.

Fri night - NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft.

Sat - W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft.

Sat night - SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft.

ANZ300 556 Am Edt Fri May 17 2024

Synopsis for the long island and connecticut coastal waters - Weak high pressure builds in from northern new england through tonight. High pressure generally remains in control through the middle of next week, gradually giving way to an approaching cold front.


7 Day Forecast for Marine Location Near Groton, CT
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Area Discussion for - New York City/Upton, NY
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FXUS61 KOKX 171147 AFDOKX

Area Forecast Discussion National Weather Service New York NY 747 AM EDT Fri May 17 2024

SYNOPSIS
Weak high pressure builds in from Northern New England through tonight. High pressure generally remains in control through the middle of next week, gradually giving way to an approaching cold front.

NEAR TERM /THROUGH TONIGHT/
Low pressure offshore gradually moves away from the area today.
Brisk onshore northeasterly flow is allowing for continued low stratus to linger along the coast and push inland. Additionally coastal areas, mainly Long Island and extreme coastal southern Connecticut, are seeing waves of low level moisture being advected onshore in the form of patchy drizzle. This moisture should gradually diminish as the boundary layer dries a bit from daytime heating, but patchy drizzle and mist will remain possible through the early morning hours.

Shortwave ridging over the area allows a weak surface high pressure to build into the area from Northern New England through the day. This will promote a drying of the column, though a continued onshore northeast flow will likely allow cloud cover to persist much of the day. Temperatures will be seasonable with highs in the low to middle 70s.

Cloud cover and dry conditions will persist tonight as high pressure continues to allow for a northeast flow, though it will be weakening. Lows tonight will be in the 50s.

SHORT TERM /SATURDAY THROUGH SUNDAY NIGHT/
Weak high pressure looks to remain in control on Saturday with a weakening frontal system approaching from the west. As the cold front approaches during the day, some widely scattered rain showers will be possible for extreme western portions of the area. Much of the energy associated with the shortwave trough and frontal system looks to consolidate in a low pressure system that develops well south of the area over the Southeast US and Carolina Coast into Saturday night and Sunday.

The high pressure remains in control through the weekend with the low passing far enough to the south as to not have much of, if any, impact to the area. More pronounced mid-level ridging approaches the area from the west Sunday and into Sunday night, which strengthens the surface high pressure over the area. This should allow for further drying and a reduction in cloud cover through the weekend.

A persistent E/NE flow through the weekend will prevent temperatures from rising too much. Highs Saturday will be in the middle to upper 60s with highs Sunday warming up a bit into the middle 60s to middle 70s. Lows each night will be in the 50s.

LONG TERM /MONDAY THROUGH THURSDAY/
*Key Points*

*Mainly dry and above normal for the period.

*Late week cold frontal passage, preceded by showers and thunderstorms.

A relatively quiet period is expected with ridging both aloft and at the surface to start the week. It will also be warm, especially away from the immediate coast where an onshore flow will keep it closer to normal. The warmest day will likely be Thursday ahead of the cold front, about 5 to 10 degrees above normal. The potential is there for larger departures.

A southern branch upper trough lifts NE out of the Great Basin early next week, interacting with some northern branch short wave energy.
There are some timing issues with the associated frontal system due to this interaction. A cold frontal passage is expected sometime Thursday, preceded by a chance of showers and thunderstorms.
Primarily followed the NBM, but 00Z global models so some slowing of the system and tried to reflect that trend. While there is also a chance of convection Wednesday, the better chance looks to be Thursday.

AVIATION /12Z FRIDAY THROUGH TUESDAY/
Low pressure becomes nearly stationary well southeast of the area, while high pressure builds along the New England coast.

MVFR ceilings are still possible at the NYC terminals through about 13Z, otherwise it will be VFR today. MVFR ceilings will return late tonight, first across the eastern terminals during the early morning hours, and then around 14-15Z Saturday for the NYC and Lower Hudson terminals. Timing will likely need to be refined.

N-NE winds 10-15kt, occasional G15-20kt at the coastal terminals this morning. KGON could see those gusts linger into the first half of the afternoon. Winds likely veer to the E/SE at 10 kt or less in the afternoon as the surface ridge axis builds into the area. Wind become light and variable tonight and then NE around 5 kt.

...NY Metro (KEWR/KLGA/KJFK/KTEB) TAF Uncertainty...

A few gusts 15-20 kt this morning. Winds could become more southerly this afternoon than forecast.

There is some uncertainty with timing the return of MVFR ceilings on Saturday. It is possible for an earlier arrival.

OUTLOOK FOR 12Z SATURDAY THROUGH TUESDAY...

Saturday: MVFR likely. Slight chance of showers, mainly N and W of the city terminals. Patchy light rain and/or drizzle possible as well.

Sunday...Chance of MVFR in the morning, then VFR. MVFR or lower could persist at the eastern terminals.

Monday-Tuesday...VFR.

Detailed information, including hourly TAF wind component forecasts, can be found at: https:/ www.weather.gov/zny/n90

MARINE
SCA conditions continue on the ocean waters as waves will remain at or above 5 feet through the day. Waves gradually diminish below SCA thresholds this evening for the western ocean zone though the central and eastern ocean zones will take more time to drop below SCA threshold. All waters drop below SCA conditions by Saturday and remain below through the middle of next week as high pressure remains in control.

HYDROLOGY
There are no hydrologic issues through the end of next week.

OKX WATCHES/WARNINGS/ADVISORIES
CT...None.
NY...None.
NJ...None.
MARINE...Small Craft Advisory until 6 AM EDT Saturday for ANZ350-353.
Small Craft Advisory until 6 PM EDT this evening for ANZ355.




Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesinHgDewPt
LDLC3 - New London Ledge CT - Ledge Light Weather 0 mi17 min NNE 15G19 60°F
NLHC3 5 mi47 min 58°F 62°F29.96
MTKN6 - 8510560 - Montauk, NY 19 mi47 min 56°F 53°F29.90
QPTR1 - 8454049 - Quonset Point, RI 41 mi47 min N 17G21 58°F 29.98
NWPR1 - 8452660 - Newport, RI 42 mi47 min NNE 8.9G13 56°F 54°F29.97
PDVR1 42 mi47 min N 12G17 58°F 29.9650°F
NWHC3 - 8465705 - New Haven, CT 44 mi47 min NNE 8G13 59°F 57°F29.98
NAXR1 - Narragansett Bay Reserve, RI 46 mi62 min E 9.9 56°F 29.9852°F
PRUR1 46 mi47 min 57°F 53°F
PTCR1 - 8452951 - Potter Cove, Prudence Island, RI 46 mi47 min NE 8.9G14 57°F 30.00
CPTR1 - 8452944 - Conimicut Light, RI 48 mi47 min N 13G18 56°F 57°F29.98


Wind History for Quonset Point, RI
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Airport Reports
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AirportDistAgeWind ktVisSkyWeatherTempDewPtRHinHg
KGON GROTONNEW LONDON,CT 3 sm50 minNNE 1110 smOvercast61°F52°F72%29.95
KWST WESTERLY STATE,RI 15 sm53 minNNE 0810 smOvercast57°F50°F77%29.95
KMTP MONTAUK,NY 17 sm52 minNNE 07--57°F52°F82%29.96
KSNC CHESTER,CT 23 sm11 minNNE 08G1310 smMostly Cloudy63°F50°F63%29.98
Link to 5 minute data for KGON


Wind History from GON
(wind in knots)
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Tide / Current for Silver Eel Pond, Fishers Island, N.Y.
   
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Silver Eel Pond
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Fri -- 02:46 AM EDT     Moonset
Fri -- 05:27 AM EDT     Sunrise
Fri -- 05:39 AM EDT     2.08 feet High Tide
Fri -- 12:09 PM EDT     0.50 feet Low Tide
Fri -- 02:21 PM EDT     Moonrise
Fri -- 06:13 PM EDT     2.35 feet High Tide
Fri -- 08:02 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Silver Eel Pond, Fishers Island, N.Y., Tide feet
12
am
0.7
1
am
0.8
2
am
1.2
3
am
1.5
4
am
1.8
5
am
2
6
am
2.1
7
am
1.9
8
am
1.7
9
am
1.5
10
am
1.1
11
am
0.7
12
pm
0.5
1
pm
0.6
2
pm
1
3
pm
1.4
4
pm
1.8
5
pm
2.2
6
pm
2.3
7
pm
2.3
8
pm
2.1
9
pm
1.8
10
pm
1.5
11
pm
1


Tide / Current for The Race, Long Island Sound, New York Current
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The Race
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Fri -- 01:53 AM EDT     0.00 knots Slack
Fri -- 02:46 AM EDT     Moonset
Fri -- 04:40 AM EDT     1.78 knots Max Flood
Fri -- 05:27 AM EDT     Sunrise
Fri -- 07:53 AM EDT     -0.00 knots Slack
Fri -- 10:52 AM EDT     -2.24 knots Max Ebb
Fri -- 02:09 PM EDT     0.00 knots Slack
Fri -- 02:21 PM EDT     Moonrise
Fri -- 05:05 PM EDT     2.05 knots Max Flood
Fri -- 08:02 PM EDT     Sunset
Fri -- 08:23 PM EDT     -0.00 knots Slack
Fri -- 11:23 PM EDT     -2.40 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

The Race, Long Island Sound, New York Current, knots
12
am
-1.7
1
am
-0.9
2
am
0.1
3
am
1.1
4
am
1.7
5
am
1.8
6
am
1.5
7
am
0.9
8
am
-0.1
9
am
-1.2
10
am
-2
11
am
-2.2
12
pm
-1.9
1
pm
-1.2
2
pm
-0.2
3
pm
0.9
4
pm
1.8
5
pm
2
6
pm
1.9
7
pm
1.4
8
pm
0.5
9
pm
-0.7
10
pm
-1.8
11
pm
-2.3


Weather Map
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GEOS Local Image of north east   
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