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

14°F
Clear
Clear
-0.9°F
9.2°F
58%
WNW 13.9 mph
21.6 mph
-2.5°F
1.2°F
0 in
0%
9 mi
1017 mbar
0

Five Day Weather Forecast

Partly Cloudy
Wed
H: 23°F
L: 1°F
Sunny
Thu
H: 26°F
L: 16°F
Sunny
Fri
H: 17°F
L: 9°F
Partly Cloudy
Sat
H: 22°F
L: 4°F
Blizzard
Sun
H: 26°F
L: 21°F

Air Quality

PM2.5: 10.75 μg/m3
PM10: 10.95 μg/m3
Carbon Monoxide: 232.85 μg/m3
Nitrogen Dioxide: 13.25 μg/m3
Sulphur Dioxide: 2.95 μg/m3
Ozone: 61 μg/m3

Astronomical

Sunrise: 7:06 AM
Sun Transit: 12:05 AM
Sunset: 5:05 PM
Daylight: 9 hrs 59 mins
Moonrise: 12:15 AM
Moon Transit: 8:20 PM
Moonset: 3:19 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 78.1%

Best Times for Fishing or Hunting

Major Periods

9:40 AM - 12:10 AM
7:50 PM - 10:20 PM

Minor Periods

11:45 AM - 1:15 PM
2:49 AM - 4:19 AM

Action Rating: 2 out of 5

Cold Weather Advisory issued January 27 at 3:26PM EST until January 28 at 10:00AM EST by NWS Upton NY

Effective: Tue January 27, 2026, 3:26 PM
Expires: Tue January 27, 2026, 11:30 PM

* WHAT...Very cold wind chills as low as 5 below expected. * WHERE...Northern Nassau and Southern Nassau Counties. * WHEN...From midnight tonight to 10 AM EST Wednesday. * IMPACTS...The cold wind chills could result in hypothermia if precautions are not taken.

Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves.


Cold Weather Advisory issued January 27 at 3:26PM EST until January 28 at 10:00AM EST by NWS Upton NY

Effective: Tue January 27, 2026, 3:26 PM
Expires: Tue January 27, 2026, 11:30 PM

* WHAT...Very cold wind chills as low as 6 below expected. * WHERE...Bronx, Kings (Brooklyn), New York (Manhattan), Northern Queens, Richmond (Staten Island), and Southern Queens Counties. * WHEN...From midnight tonight to 10 AM EST Wednesday. * IMPACTS...The cold wind chills could result in hypothermia if precautions are not taken.

Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves.
Wednesday, January 28, 2026

Weather Forecast

Partly Cloudy
23.2°F
1.4°F
14°F
70%
0 in
0%
0%
14.3 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 12.63 μg/m3
PM10: 12.83 μg/m3
Carbon Monoxide: 279.73 μg/m3
Nitrogen Dioxide: 21.87 μg/m3
Sulphur Dioxide: 4.9 μg/m3
Ozone: 54.8 μg/m3

Astronomical

Sunrise: 7:06 AM
Sun Transit: 12:05 AM
Sunset: 5:05 PM
Daylight: 9 hrs 59 mins
Moonrise: 12:15 AM
Moon Transit: 8:20 PM
Moonset: 3:19 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 78.1%

Best Times for Fishing or Hunting

Major Periods

9:40 AM - 12:10 AM
7:50 PM - 10:20 PM

Minor Periods

11:45 AM - 1:15 PM
2:49 AM - 4:19 AM

Action Rating: 2 out of 5

Thursday, January 29, 2026

Weather Forecast

Sunny
26.1°F
15.8°F
19.8°F
73%
0 in
0%
0%
13.2 mph
0.3


Air Quality

AQI: 1 - Good
PM2.5: 13.09 μg/m3
PM10: 13.3 μg/m3
Carbon Monoxide: 286.33 μg/m3
Nitrogen Dioxide: 30.99 μg/m3
Sulphur Dioxide: 4.17 μg/m3
Ozone: 43.04 μg/m3

Astronomical

Sunrise: 7:05 AM
Sun Transit: 12:05 AM
Sunset: 5:06 PM
Daylight: 10 hrs 1 mins
Moonrise: 1:14 PM
Moon Transit: 9:25 PM
Moonset: 4:31 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 86.7%

Best Times for Fishing or Hunting

Major Periods

10:44 AM - 1:14 PM
8:55 PM - 11:25 PM

Minor Periods

12:44 AM - 2:14 PM
4:01 AM - 5:31 AM

Action Rating: 2 out of 5

Friday, January 30, 2026

Weather Forecast

Sunny
17.4°F
9°F
14°F
67%
0 in
0%
0%
13.6 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 6.6 μg/m3
PM10: 6.7 μg/m3
Carbon Monoxide: 230.67 μg/m3
Nitrogen Dioxide: 17.51 μg/m3
Sulphur Dioxide: 3.09 μg/m3
Ozone: 55.48 μg/m3

Astronomical

Sunrise: 7:04 AM
Sun Transit: 12:05 AM
Sunset: 5:08 PM
Daylight: 10 hrs 3 mins
Moonrise: 2:25 PM
Moon Transit: 10:29 PM
Moonset: 5:34 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 93.4%

Best Times for Fishing or Hunting

Major Periods

11:48 AM - 2:18 PM
12:00 AM - 12:00 AM

Minor Periods

1:55 PM - 3:25 PM
5:04 AM - 6:34 AM

Action Rating: 2 out of 5

Saturday, January 31, 2026

Weather Forecast

Partly Cloudy
21.5°F
4.4°F
14°F
83%
0 in
0%
10%
19.7 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 6.09 μg/m3
PM10: 6.21 μg/m3
Carbon Monoxide: 235.14 μg/m3
Nitrogen Dioxide: 18.46 μg/m3
Sulphur Dioxide: 2.63 μg/m3
Ozone: 51.46 μg/m3

Astronomical

Sunrise: 7:03 AM
Sun Transit: 12:05 AM
Sunset: 5:09 PM
Daylight: 10 hrs 6 mins
Moonrise: 3:42 PM
Moon Transit: 11:29 PM
Moonset: 6:24 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.9%

Best Times for Fishing or Hunting

Major Periods

12:50 AM - 3:20 PM
12:00 AM - 12:00 AM

Minor Periods

3:12 PM - 4:42 PM
5:54 AM - 7:24 AM

Action Rating: 4 out of 5

Sunday, February 1, 2026

Weather Forecast

Blizzard
25.5°F
20.9°F
22.6°F
88%
0.49 in
73%
61%
33.3 mph
0


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:02 AM
Sun Transit: 12:05 AM
Sunset: 5:10 PM
Daylight: 10 hrs 8 mins
Moonrise: 5:00 PM
Moon Transit: 12:00 AM
Moonset: 7:04 AM
Moon Phase: Full
Moon Illumination: 99.9%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
1:47 PM - 4:17 PM

Minor Periods

4:30 PM - 6:00 PM
6:34 AM - 8:04 AM

Action Rating: 4 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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