Water Temperature of Great South Bay in West Sayville, NY

Current Water Temperature

35.8°F

Measurement Time: Thursday, February 13, 2025, 6:54 PM EST

Temperature Locations

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Local Points of Interest

Green Creek; Sayville Beach & Marina

Great South Bay

Station Name: GREAT SOUTH BAY AT WEST SAYVILLE NY
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 0 feet

Nearest Address:
198 Atlantic Ave
West Sayville, NY 11796
Suffolk County

GPS Coordinates: 40.72105556, -73.09125

Nearby Water Temperatures

Flax Pond, Old Field, NY (16.9 mi)
Reynolds Channel, Point Lookout, NY (27.3 mi)
Peconic River, Riverhead, NY (27.3 mi)
Frost Creek, Lattingtown, NY (29.2 mi)
Hempstead Lake, Lakeview, NY (29.2 mi)
Mill River, Fairfield, CT (29.7 mi)
Norwalk Harbor, Norwalk, CT (29.8 mi)
Saugatuck River, Westport, CT (30.1 mi)
Mill River, Southport, CT (30.1 mi)
Hog Island Channel, Island Park, NY (30.6 mi)
Norwalk River, Norwalk, CT (31.3 mi)
Saugatuck River, Westport Village, CT (31.4 mi)
Bridgeport Harbor, Bridgeport, CT (31.6 mi)
Norwalk River, Norwalk, CT (31.7 mi)
Housatonic River, Stratford, CT (32.3 mi)

Weather for West Sayville, New York

Current Weather

32.2°F
Partly cloudy
Partly cloudy
24.7°F
30.6°F
69%
NW 8.5 mph
10.4 mph
25.1°F
22.1°F
0 in
75%
9 mi
1017 mbar
1.3

Five Day Weather Forecast

Partly Cloudy
Sun
H: 31°F
L: 24°F
Cloudy
Mon
H: 26°F
L: 19°F
Freezing fog
Tue
H: 38°F
L: 28°F
Patchy rain nearby
Wed
H: 44°F
L: 37°F
Partly Cloudy
Thu
H: 45°F
L: 37°F

Air Quality

AQI: 1 - Good
PM2.5: 7.35 μg/m3
PM10: 7.35 μg/m3
Carbon Monoxide: 217.85 μg/m3
Nitrogen Dioxide: 18.15 μg/m3
Sulphur Dioxide: 3.75 μg/m3
Ozone: 59 μg/m3

Astronomical

Sunrise: 7:16 AM
Sun Transit: 11:57 AM
Sunset: 4:39 PM
Daylight: 9 hrs 22 mins
Moonrise: 6:10 PM
Moon Transit: 12:48 AM
Moonset: 8:34 AM
Moon Phase: Full
Moon Illumination: 98.1%

Best Times for Fishing or Hunting

Major Periods

12:18 AM - 2:48 AM
3:08 PM - 5:38 PM

Minor Periods

5:40 PM - 7:10 PM
8:04 AM - 9:34 AM

Action Rating: 3 out of 5

Special Weather Statement issued January 4 at 7:19AM EST by NWS Upton NY

Effective: Sun January 4, 2026, 7:19 AM
Expires: Sun January 4, 2026, 8:30 AM

Light snow or flurries will continue to track west to east across the area. A dusting to a couple of tenths of an inch of snowfall can be expected. Some slippery travel is possible. Allow some extra time if traveling this morning.


Coastal Flood Statement issued January 4 at 12:53AM EST until January 4 at 10:00AM EST by NWS Upton NY

Effective: Sun January 4, 2026, 12:53 AM
Expires: Sun January 4, 2026, 9:00 AM

* WHAT...Up to one half foot of inundation above ground level expected in vulnerable areas near the waterfront and shoreline. * WHERE...In New Jersey, Hudson, Eastern Bergen, Eastern Essex and Eastern Union Counties. In New York, Richmond (Staten Island), Southern Queens and Southern Nassau Counties. * WHEN...From 7 AM to 10 AM EST this morning. * IMPACTS...Brief minor flooding of the more vulnerable locations near the waterfront and shoreline. * ADDITIONAL DETAILS...

Do not drive through flooded roadways.
Sunday, January 4, 2026

Weather Forecast

Partly Cloudy
31.1°F
24.4°F
28.1°F
64%
0 in
0%
0%
14.3 mph
0.3


Air Quality

AQI: 1 - Good
PM2.5: 9.94 μg/m3
PM10: 10.09 μg/m3
Carbon Monoxide: 236.61 μg/m3
Nitrogen Dioxide: 27.36 μg/m3
Sulphur Dioxide: 4.96 μg/m3
Ozone: 50.76 μg/m3

Astronomical

Sunrise: 7:16 AM
Sun Transit: 11:57 AM
Sunset: 4:39 PM
Daylight: 9 hrs 22 mins
Moonrise: 6:10 PM
Moon Transit: 12:48 AM
Moonset: 8:34 AM
Moon Phase: Full
Moon Illumination: 98.1%

Best Times for Fishing or Hunting

Major Periods

12:18 AM - 2:48 AM
3:08 PM - 5:38 PM

Minor Periods

5:40 PM - 7:10 PM
8:04 AM - 9:34 AM

Action Rating: 3 out of 5

Monday, January 5, 2026

Weather Forecast

Cloudy
25.8°F
19°F
23.7°F
68%
0 in
0%
0%
12.8 mph
0.2


Air Quality

AQI: 1 - Good
PM2.5: 9.81 μg/m3
PM10: 10.29 μg/m3
Carbon Monoxide: 224.45 μg/m3
Nitrogen Dioxide: 30.12 μg/m3
Sulphur Dioxide: 5.35 μg/m3
Ozone: 42.72 μg/m3

Astronomical

Sunrise: 7:16 AM
Sun Transit: 11:57 AM
Sunset: 4:40 PM
Daylight: 9 hrs 23 mins
Moonrise: 7:26 PM
Moon Transit: 1:46 AM
Moonset: 9:09 AM
Moon Phase: Full
Moon Illumination: 93.7%

Best Times for Fishing or Hunting

Major Periods

1:16 AM - 3:46 AM
4:03 PM - 6:33 PM

Minor Periods

6:56 PM - 8:26 PM
8:39 AM - 10:09 AM

Action Rating: 3 out of 5

Tuesday, January 6, 2026

Weather Forecast

Freezing fog
37.6°F
28.2°F
33.3°F
90%
0 in
0%
0%
6.3 mph
0.2


Air Quality

AQI: 2 - Moderate
PM2.5: 15.99 μg/m3
PM10: 18.11 μg/m3
Carbon Monoxide: 246.13 μg/m3
Nitrogen Dioxide: 32.07 μg/m3
Sulphur Dioxide: 6.65 μg/m3
Ozone: 36.08 μg/m3

Astronomical

Sunrise: 7:16 AM
Sun Transit: 11:58 AM
Sunset: 4:41 PM
Daylight: 9 hrs 24 mins
Moonrise: 8:39 PM
Moon Transit: 2:38 AM
Moonset: 9:37 AM
Moon Phase: Waning Gibbous
Moon Illumination: 87.1%

Best Times for Fishing or Hunting

Major Periods

2:08 AM - 4:38 AM
4:52 PM - 7:22 PM

Minor Periods

8:09 PM - 9:39 PM
9:07 AM - 10:37 AM

Action Rating: 3 out of 5

Wednesday, January 7, 2026

Weather Forecast

Patchy rain nearby
44.1°F
37.1°F
41.6°F
93%
0.01 in
80%
0%
14.1 mph
0.2


Air Quality

AQI: 2 - Moderate
PM2.5: 15.97 μg/m3
PM10: 19.12 μg/m3
Carbon Monoxide: 276.32 μg/m3
Nitrogen Dioxide: 24.65 μg/m3
Sulphur Dioxide: 5.48 μg/m3
Ozone: 35.96 μg/m3

Astronomical

Sunrise: 7:16 AM
Sun Transit: 11:58 AM
Sunset: 4:42 PM
Daylight: 9 hrs 25 mins
Moonrise: 9:46 PM
Moon Transit: 3:26 AM
Moonset: 10:01 AM
Moon Phase: Waning Gibbous
Moon Illumination: 78.6%

Best Times for Fishing or Hunting

Major Periods

2:56 AM - 5:26 AM
5:37 PM - 8:07 PM

Minor Periods

9:16 PM - 10:46 PM
9:31 AM - 11:01 AM

Action Rating: 2 out of 5

Thursday, January 8, 2026

Weather Forecast

Partly Cloudy
44.6°F
37.3°F
41.5°F
75%
0 in
0%
0%
15.7 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 7.4 μg/m3
PM10: 7.43 μg/m3
Carbon Monoxide: 264.36 μg/m3
Nitrogen Dioxide: 27.53 μg/m3
Sulphur Dioxide: 4.9 μg/m3
Ozone: 30.31 μg/m3

Astronomical

Sunrise: 7:16 AM
Sun Transit: 12:00 AM
Sunset: 4:43 PM
Daylight: 9 hrs 26 mins
Moonrise: 10:51 PM
Moon Transit: 4:09 AM
Moonset: 10:22 AM
Moon Phase: Waning Gibbous
Moon Illumination: 68.7%

Best Times for Fishing or Hunting

Major Periods

3:39 AM - 6:09 AM
6:20 PM - 8:50 PM

Minor Periods

10:21 PM - 11:51 PM
9:52 AM - 11:22 AM

Action Rating: 2 out of 5

The times presented here are based upon the solunar theory, which is the idea that the movements of fish and other animals are affected by the location of the sun and moon. The major periods are believed to be the times of the greatest animal activity and occur when the moon is directly overhead or underfoot (lunar transits). The minor periods also see increased activity and occur when the moon is rising or setting. The strongest activity occurs during full or new moons, and the weakest during quarter or three quarter moons. This is indicated by the Action Rating.

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