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

3.9°F
Clear
Clear
-7.3°F
-0°F
76%
WNW 6 mph
12.7 mph
-10.6°F
-14.6°F
0 in
0%
9 mi
1021 mbar
0

Five Day Weather Forecast

Sunny
Sat
H: 20°F
L: -4°F
Overcast
Sun
H: 22°F
L: 14°F
Sunny
Mon
H: 34°F
L: 13°F
Sunny
Tue
H: 30°F
L: 17°F
Moderate snow
Wed
H: 29°F
L: 18°F

Air Quality

AQI: 1 - Good
PM2.5: 12.85 μg/m3
PM10: 13.15 μg/m3
Carbon Monoxide: 245.85 μg/m3
Nitrogen Dioxide: 21.45 μg/m3
Sulphur Dioxide: 3.65 μg/m3
Ozone: 51 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

Cold Weather Advisory issued January 30 at 1:49PM EST until January 31 at 10:00AM EST by NWS Upton NY

Effective: Fri January 30, 2026, 1:49 PM
Expires: Sat January 31, 2026, 6:15 AM

* WHAT...Very cold wind chills as low as 10 below. * WHERE...Portions of northeast New Jersey and southeast New York. * WHEN...Until 10 AM EST Saturday. * IMPACTS...The cold wind chills could result in hypothermia if precautions are not taken. * ADDITIONAL DETAILS...Coldest wind chills generally between 11PM EST tonight and 9AM EST Saturday.

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


Cold Weather Advisory issued January 30 at 1:49PM EST until January 31 at 10:00AM EST by NWS Upton NY

Effective: Fri January 30, 2026, 1:49 PM
Expires: Sat January 31, 2026, 6:15 AM

* WHAT...Very cold wind chills as low as 10 below. * WHERE...Portions of southern Connecticut, northeast New Jersey, and southeast New York. * WHEN...Until 10 AM EST Saturday. * IMPACTS...The cold wind chills could result in hypothermia if precautions are not taken. * ADDITIONAL DETAILS...Coldest wind chills generally between 11PM EST tonight and 9AM EST Saturday.

Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves.
Saturday, January 31, 2026

Weather Forecast

Sunny
20.3°F
-4.4°F
10.3°F
65%
0 in
0%
0%
14.1 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 9.87 μg/m3
PM10: 10.03 μg/m3
Carbon Monoxide: 220.81 μg/m3
Nitrogen Dioxide: 22 μg/m3
Sulphur Dioxide: 3.23 μg/m3
Ozone: 52.36 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

Overcast
22.3°F
13.8°F
17.9°F
72%
0 in
0%
0%
22.8 mph
0.3


Air Quality

AQI: 1 - Good
PM2.5: 5.41 μg/m3
PM10: 5.78 μg/m3
Carbon Monoxide: 191.93 μg/m3
Nitrogen Dioxide: 11.95 μg/m3
Sulphur Dioxide: 2.2 μg/m3
Ozone: 66.8 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

Monday, February 2, 2026

Weather Forecast

Sunny
34°F
13.3°F
21.9°F
70%
0 in
0%
0%
18.3 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 5.22 μg/m3
PM10: 5.67 μg/m3
Carbon Monoxide: 192.97 μg/m3
Nitrogen Dioxide: 12.3 μg/m3
Sulphur Dioxide: 2.61 μg/m3
Ozone: 75.96 μg/m3

Astronomical

Sunrise: 7:01 AM
Sun Transit: 12:06 AM
Sunset: 5:11 PM
Daylight: 10 hrs 10 mins
Moonrise: 6:15 PM
Moon Transit: 12:24 AM
Moonset: 7:35 AM
Moon Phase: Full
Moon Illumination: 99.4%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
2:39 PM - 5:09 PM

Minor Periods

5:45 PM - 7:15 PM
7:05 AM - 8:35 AM

Action Rating: 5 out of 5

Tuesday, February 3, 2026

Weather Forecast

Sunny
30.4°F
17.1°F
23.6°F
83%
0 in
0%
0%
11 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 11.51 μg/m3
PM10: 11.67 μg/m3
Carbon Monoxide: 273.79 μg/m3
Nitrogen Dioxide: 26.95 μg/m3
Sulphur Dioxide: 4.21 μg/m3
Ozone: 55.12 μg/m3

Astronomical

Sunrise: 7:00 AM
Sun Transit: 12:06 AM
Sunset: 5:12 PM
Daylight: 10 hrs 12 mins
Moonrise: 7:25 PM
Moon Transit: 1:14 AM
Moonset: 8:01 AM
Moon Phase: Full
Moon Illumination: 96.3%

Best Times for Fishing or Hunting

Major Periods

12:44 AM - 3:14 AM
3:27 PM - 5:57 PM

Minor Periods

6:55 PM - 8:25 PM
7:31 AM - 9:01 AM

Action Rating: 3 out of 5

Wednesday, February 4, 2026

Weather Forecast

Moderate snow
29.3°F
17.8°F
24.6°F
89%
0.05 in
63%
9%
13 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 10.77 μg/m3
PM10: 10.78 μg/m3
Carbon Monoxide: 321.71 μg/m3
Nitrogen Dioxide: 42.37 μg/m3
Sulphur Dioxide: 3.91 μg/m3
Ozone: 26.23 μg/m3

Astronomical

Sunrise: 6:59 AM
Sun Transit: 12:06 AM
Sunset: 5:14 PM
Daylight: 10 hrs 14 mins
Moonrise: 8:33 PM
Moon Transit: 2:00 AM
Moonset: 8:23 AM
Moon Phase: Full
Moon Illumination: 90.9%

Best Times for Fishing or Hunting

Major Periods

1:30 AM - 4:00 AM
4:11 PM - 6:41 PM

Minor Periods

8:03 PM - 9:33 PM
7:53 AM - 9:23 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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