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

41.4°F
Sunny
Sunny
35.9°F
42.8°F
51%
SSE 8.7 mph
11.1 mph
38.1°F
25.5°F
0 in
0%
9 mi
1036 mbar
0.4

Five Day Weather Forecast

Sunny
Wed
H: 52°F
L: 29°F
Sunny
Thu
H: 48°F
L: 33°F
Cloudy
Fri
H: 47°F
L: 36°F
Partly Cloudy
Sat
H: 61°F
L: 44°F
Sunny
Sun
H: 52°F
L: 44°F

Air Quality

AQI: 1 - Good
PM2.5: 9.55 μg/m3
PM10: 12.05 μg/m3
Carbon Monoxide: 201.85 μg/m3
Nitrogen Dioxide: 22.65 μg/m3
Sulphur Dioxide: 2.95 μg/m3
Ozone: 71 μg/m3

Astronomical

Sunrise: 6:25 AM
Sun Transit: 12:54 AM
Sunset: 7:24 PM
Daylight: 13 hrs mins
Moonrise: 1:23 AM
Moon Transit: 5:40 AM
Moonset: 9:59 AM
Moon Phase: Last Quarter
Moon Illumination: 53.2%

Best Times for Fishing or Hunting

Major Periods

5:10 AM - 7:40 AM
7:56 PM - 10:26 PM

Minor Periods

9:29 AM - 10:59 AM
12:53 AM - 2:23 AM

Action Rating: 2 out of 5

Frost Advisory issued April 8 at 2:30PM EDT until April 9 at 9:00AM EDT by NWS Upton NY

Effective: Wed April 8, 2026, 2:30 PM
Expires: Thu April 9, 2026, 9:00 AM

* WHAT...Temperatures as low as 34 will result in frost formation. * WHERE...In New Jersey, Eastern Essex, Eastern Union, and Hudson Counties. In New York, Northern Nassau and Southern Nassau Counties. * WHEN...From 11 PM this evening to 9 AM EDT Thursday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.

Take steps now to protect tender plants from the cold.
Wednesday, April 8, 2026

Weather Forecast

Sunny
52°F
29.3°F
38°F
52%
0 in
0%
0%
15.9 mph
1.3


Air Quality

AQI: 1 - Good
PM2.5: 4.13 μg/m3
PM10: 4.89 μg/m3
Carbon Monoxide: 180.89 μg/m3
Nitrogen Dioxide: 5.84 μg/m3
Sulphur Dioxide: 2.03 μg/m3
Ozone: 86.68 μg/m3

Astronomical

Sunrise: 6:25 AM
Sun Transit: 12:54 AM
Sunset: 7:24 PM
Daylight: 13 hrs mins
Moonrise: 1:23 AM
Moon Transit: 5:40 AM
Moonset: 9:59 AM
Moon Phase: Last Quarter
Moon Illumination: 53.2%

Best Times for Fishing or Hunting

Major Periods

5:10 AM - 7:40 AM
7:56 PM - 10:26 PM

Minor Periods

9:29 AM - 10:59 AM
12:53 AM - 2:23 AM

Action Rating: 2 out of 5

Thursday, April 9, 2026

Weather Forecast

Sunny
48.2°F
32.7°F
39.8°F
76%
0 in
0%
0%
10.1 mph
1.4


Air Quality

AQI: 1 - Good
PM2.5: 11.29 μg/m3
PM10: 15.58 μg/m3
Carbon Monoxide: 188.69 μg/m3
Nitrogen Dioxide: 16.26 μg/m3
Sulphur Dioxide: 2.77 μg/m3
Ozone: 80.76 μg/m3

Astronomical

Sunrise: 6:23 AM
Sun Transit: 12:53 AM
Sunset: 7:25 PM
Daylight: 13 hrs 2 mins
Moonrise: 2:11 AM
Moon Transit: 6:31 AM
Moonset: 10:56 AM
Moon Phase: Last Quarter
Moon Illumination: 41.9%

Best Times for Fishing or Hunting

Major Periods

6:01 AM - 8:31 AM
8:47 PM - 11:17 PM

Minor Periods

10:26 AM - 11:56 AM
1:41 AM - 3:11 AM

Action Rating: 3 out of 5

Friday, April 10, 2026

Weather Forecast

Cloudy
46.8°F
36.3°F
41.4°F
87%
0 in
0%
0%
14.5 mph
1.5


Air Quality

AQI: 1 - Good
PM2.5: 13.81 μg/m3
PM10: 18.55 μg/m3
Carbon Monoxide: 173.77 μg/m3
Nitrogen Dioxide: 13.18 μg/m3
Sulphur Dioxide: 3.85 μg/m3
Ozone: 80.2 μg/m3

Astronomical

Sunrise: 6:22 AM
Sun Transit: 12:53 AM
Sunset: 7:26 PM
Daylight: 13 hrs 5 mins
Moonrise: 2:51 AM
Moon Transit: 7:22 AM
Moonset: 11:59 AM
Moon Phase: Last Quarter
Moon Illumination: 31.0%

Best Times for Fishing or Hunting

Major Periods

6:52 AM - 9:22 AM
12:00 AM - 12:00 AM

Minor Periods

11:29 AM - 12:59 AM
2:21 AM - 3:51 AM

Action Rating: 2 out of 5

Saturday, April 11, 2026

Weather Forecast

Partly Cloudy
61.3°F
44.1°F
51.3°F
63%
0 in
0%
0%
17 mph
1.5


Air Quality

AQI: 1 - Good
PM2.5: 8.52 μg/m3
PM10: 9.58 μg/m3
Carbon Monoxide: 187.02 μg/m3
Nitrogen Dioxide: 15.55 μg/m3
Sulphur Dioxide: 3.5 μg/m3
Ozone: 81.12 μg/m3

Astronomical

Sunrise: 6:20 AM
Sun Transit: 12:53 AM
Sunset: 7:27 PM
Daylight: 13 hrs 8 mins
Moonrise: 3:24 AM
Moon Transit: 8:11 AM
Moonset: 1:05 PM
Moon Phase: Last Quarter
Moon Illumination: 21.1%

Best Times for Fishing or Hunting

Major Periods

7:41 AM - 10:11 AM
12:00 AM - 12:00 AM

Minor Periods

12:35 AM - 2:05 PM
2:54 AM - 4:24 AM

Action Rating: 2 out of 5

Sunday, April 12, 2026

Weather Forecast

Sunny
52.1°F
44°F
48.3°F
62%
0 in
0%
0%
16.1 mph
1.6


Air Quality

AQI: 1 - Good
PM2.5: 6.03 μg/m3
PM10: 6.16 μg/m3
Carbon Monoxide: 211.93 μg/m3
Nitrogen Dioxide: 17.27 μg/m3
Sulphur Dioxide: 2.7 μg/m3
Ozone: 65.54 μg/m3

Astronomical

Sunrise: 6:18 AM
Sun Transit: 12:53 AM
Sunset: 7:29 PM
Daylight: 13 hrs 10 mins
Moonrise: 3:53 AM
Moon Transit: 8:58 AM
Moonset: 2:12 PM
Moon Phase: Waning Crescent
Moon Illumination: 12.6%

Best Times for Fishing or Hunting

Major Periods

8:28 AM - 10:58 AM
12:00 AM - 12:00 AM

Minor Periods

1:42 PM - 3:12 PM
3:23 AM - 4:53 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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