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

30°F
Overcast
Overcast
23.8°F
31.9°F
92%
SW 6 mph
10 mph
27.4°F
29.5°F
0 in
100%
6 mi
1021 mbar
0

Five Day Weather Forecast

Overcast
Tue
H: 42°F
L: 31°F
Fog
Wed
H: 38°F
L: 34°F
Overcast
Thu
H: 38°F
L: 32°F
Moderate rain
Fri
H: 35°F
L: 34°F
Patchy rain nearby
Sat
H: 41°F
L: 33°F

Air Quality

AQI: 1 - Good
PM2.5: 18.85 μg/m3
PM10: 22.55 μg/m3
Carbon Monoxide: 350.85 μg/m3
Nitrogen Dioxide: 35.75 μg/m3
Sulphur Dioxide: 5.35 μg/m3
Ozone: 49 μg/m3

Astronomical

Sunrise: 6:44 AM
Sun Transit: 12:06 AM
Sunset: 5:29 PM
Daylight: 10 hrs 46 mins
Moonrise: 6:53 AM
Moon Transit: 12:17 AM
Moonset: 5:52 PM
Moon Phase: New
Moon Illumination: 0.0%

Best Times for Fishing or Hunting

Major Periods

1:43 AM - 4:13 AM
11:47 AM - 2:17 PM

Minor Periods

5:22 PM - 6:52 PM
6:23 AM - 7:53 AM

Action Rating: 5 out of 5

Special Weather Statement issued February 16 at 2:50PM EST by NWS Upton NY

Effective: Mon February 16, 2026, 2:50 PM
Expires: Tue February 17, 2026, 7:00 AM

Spotty freezing drizzle may develop ahead of an approaching warm front late tonight into Tuesday morning. Travelers are advised to check the latest forecast and road conditions before heading out late tonight into Tuesday morning. Use caution and be prepared for potentially icy sidewalks, roads, overpasses and bridges during the early Tuesday morning commute.


Special Weather Statement issued February 16 at 2:50PM EST by NWS Upton NY

Effective: Mon February 16, 2026, 2:50 PM
Expires: Tue February 17, 2026, 7:00 AM

Spotty light snow and freezing drizzle may develop ahead of an approaching warm front late tonight into Tuesday morning. Travelers are advised to check the latest forecast and road conditions before heading out late tonight into Tuesday morning. Use caution and be prepared for potentially icy sidewalks, roads, overpasses and bridges during the early Tuesday morning commute.


Tuesday, February 17, 2026

Weather Forecast

Overcast
42.1°F
31.1°F
36.1°F
91%
0 in
0%
0%
12.8 mph
0.3


Air Quality

AQI: 2 - Moderate
PM2.5: 27.08 μg/m3
PM10: 30.42 μg/m3
Carbon Monoxide: 478.05 μg/m3
Nitrogen Dioxide: 61.51 μg/m3
Sulphur Dioxide: 7.3 μg/m3
Ozone: 26.52 μg/m3

Astronomical

Sunrise: 6:44 AM
Sun Transit: 12:06 AM
Sunset: 5:29 PM
Daylight: 10 hrs 46 mins
Moonrise: 6:53 AM
Moon Transit: 12:17 AM
Moonset: 5:52 PM
Moon Phase: New
Moon Illumination: 0.0%

Best Times for Fishing or Hunting

Major Periods

1:43 AM - 4:13 AM
11:47 AM - 2:17 PM

Minor Periods

5:22 PM - 6:52 PM
6:23 AM - 7:53 AM

Action Rating: 5 out of 5

Wednesday, February 18, 2026

Weather Forecast

Fog
38.1°F
34.2°F
36°F
99%
0 in
0%
0%
9.8 mph
0.1


Air Quality

AQI: 2 - Moderate
PM2.5: 35.32 μg/m3
PM10: 38.43 μg/m3
Carbon Monoxide: 384.81 μg/m3
Nitrogen Dioxide: 61.46 μg/m3
Sulphur Dioxide: 8.85 μg/m3
Ozone: 16.4 μg/m3

Astronomical

Sunrise: 6:42 AM
Sun Transit: 12:06 AM
Sunset: 5:31 PM
Daylight: 10 hrs 48 mins
Moonrise: 7:16 AM
Moon Transit: 12:00 AM
Moonset: 7:01 PM
Moon Phase: New
Moon Illumination: 1.3%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
2:30 AM - 5:00 AM

Minor Periods

6:31 PM - 8:01 PM
6:46 AM - 8:16 AM

Action Rating: 4 out of 5

Thursday, February 19, 2026

Weather Forecast

Overcast
38.1°F
31.8°F
35.7°F
89%
0 in
0%
0%
6.9 mph
0.5


Air Quality

AQI: 2 - Moderate
PM2.5: 16.69 μg/m3
PM10: 18.19 μg/m3
Carbon Monoxide: 365.45 μg/m3
Nitrogen Dioxide: 43.18 μg/m3
Sulphur Dioxide: 4.65 μg/m3
Ozone: 31.12 μg/m3

Astronomical

Sunrise: 6:41 AM
Sun Transit: 12:06 AM
Sunset: 5:32 PM
Daylight: 10 hrs 51 mins
Moonrise: 7:38 AM
Moon Transit: 4:07 PM
Moonset: 8:11 PM
Moon Phase: Waxing Crescent
Moon Illumination: 5.2%

Best Times for Fishing or Hunting

Major Periods

3:15 AM - 5:45 AM
3:37 PM - 6:07 PM

Minor Periods

7:41 PM - 9:11 PM
7:08 AM - 8:38 AM

Action Rating: 3 out of 5

Friday, February 20, 2026

Weather Forecast

Moderate rain
35.3°F
33.5°F
34.7°F
93%
0.24 in
83%
0%
13.2 mph
0.1


Air Quality

AQI: 1 - Good
PM2.5: 6.75 μg/m3
PM10: 8.72 μg/m3
Carbon Monoxide: 214.02 μg/m3
Nitrogen Dioxide: 11.83 μg/m3
Sulphur Dioxide: 1.93 μg/m3
Ozone: 69.52 μg/m3

Astronomical

Sunrise: 6:40 AM
Sun Transit: 12:06 AM
Sunset: 5:33 PM
Daylight: 10 hrs 53 mins
Moonrise: 8:01 AM
Moon Transit: 2:35 PM
Moonset: 9:22 PM
Moon Phase: Waxing Crescent
Moon Illumination: 11.3%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
2:05 PM - 4:35 PM

Minor Periods

8:52 PM - 10:22 PM
7:31 AM - 9:01 AM

Action Rating: 2 out of 5

Saturday, February 21, 2026

Weather Forecast

Patchy rain nearby
41.4°F
33.4°F
36.9°F
84%
0.04 in
86%
14%
17.2 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 2.03 μg/m3
PM10: 2.27 μg/m3
Carbon Monoxide: 185.4 μg/m3
Nitrogen Dioxide: 5.06 μg/m3
Sulphur Dioxide: 1.85 μg/m3
Ozone: 86.31 μg/m3

Astronomical

Sunrise: 6:38 AM
Sun Transit: 12:05 AM
Sunset: 5:34 PM
Daylight: 10 hrs 56 mins
Moonrise: 8:26 AM
Moon Transit: 3:24 PM
Moonset: 10:37 PM
Moon Phase: Waxing Crescent
Moon Illumination: 19.4%

Best Times for Fishing or Hunting

Major Periods

4:49 AM - 7:19 AM
2:54 PM - 5:24 PM

Minor Periods

10:07 PM - 11:37 PM
7:56 AM - 9:26 AM

Action Rating: 3 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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