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

19°F
Overcast
Overcast
4.2°F
20.7°F
49%
NNW 16.8 mph
24.6 mph
7.3°F
13.2°F
0 in
100%
9 mi
1007 mbar
0

Five Day Weather Forecast

Sunny
Sun
H: 24°F
L: 10°F
Sunny
Mon
H: 33°F
L: 10°F
Sunny
Tue
H: 30°F
L: 16°F
Cloudy
Wed
H: 32°F
L: 20°F
Sunny
Thu
H: 26°F
L: 16°F

Air Quality

AQI: 1 - Good
PM2.5: 5.05 μg/m3
PM10: 5.65 μg/m3
Carbon Monoxide: 188.85 μg/m3
Nitrogen Dioxide: 11.15 μg/m3
Sulphur Dioxide: 2.35 μg/m3
Ozone: 74 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

Coastal Flood Statement issued February 1 at 9:59AM EST until February 1 at 2:00PM EST by NWS Upton NY

Effective: Sun February 1, 2026, 9:59 AM
Expires: Sun February 1, 2026, 2:00 PM

* WHAT...Up to one half foot of inundation above ground level expected in vulnerable areas near the waterfront and shoreline. * WHERE...In Connecticut, Southern New Haven County. In New York, Bronx, Northwest Suffolk, Northeast Suffolk, Northern Queens and Northern Nassau Counties. * WHEN...Through early this afternoon. * IMPACTS...Brief minor flooding of the more vulnerable locations near the waterfront and shoreline.

Do not drive through flooded roadways.


Coastal Flood Advisory issued February 1 at 9:59AM EST until February 1 at 2:00PM EST by NWS Upton NY

Effective: Sun February 1, 2026, 9:59 AM
Expires: Sun February 1, 2026, 2:00 PM

* WHAT...Up to one foot of inundation above ground level expected in vulnerable areas near the waterfront and shoreline. * WHERE...In Connecticut, Southern Fairfield County. In New York, Southern Westchester County. * WHEN...Until 2 PM EST this afternoon. * IMPACTS...Minor flooding in the more vulnerable locations near the waterfront and shoreline. Some roads and low lying properties including parking lots, parks, lawns, and homes and businesses with basements near the waterfront will experience minor flooding. * ADDITIONAL DETAILS...Additional minor coastal flooding is possible with high tide cycles tonight through early Monday. Ice from the back bays could get pushed onshore during high tide, and flood waters could freeze on roadways, further complicating impacts.

If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property.
Sunday, February 1, 2026

Weather Forecast

Sunny
24.1°F
9.5°F
15.5°F
72%
0 in
0%
6%
19.9 mph
0.3


Air Quality

AQI: 1 - Good
PM2.5: 5.98 μg/m3
PM10: 6.53 μg/m3
Carbon Monoxide: 195.97 μg/m3
Nitrogen Dioxide: 11.81 μg/m3
Sulphur Dioxide: 2.25 μg/m3
Ozone: 67.8 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
33.1°F
10°F
20.5°F
68%
0 in
0%
0%
14.8 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 5.69 μg/m3
PM10: 6.1 μg/m3
Carbon Monoxide: 199.17 μg/m3
Nitrogen Dioxide: 13.39 μg/m3
Sulphur Dioxide: 2.69 μg/m3
Ozone: 73.76 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°F
15.8°F
23.5°F
78%
0 in
0%
0%
10.7 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 14.23 μg/m3
PM10: 14.41 μg/m3
Carbon Monoxide: 300.37 μg/m3
Nitrogen Dioxide: 33.59 μg/m3
Sulphur Dioxide: 5.24 μg/m3
Ozone: 48.92 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

Cloudy
32.4°F
19.8°F
27.9°F
82%
0 in
0%
0%
9.2 mph
0.3


Air Quality

AQI: 1 - Good
PM2.5: 14.51 μg/m3
PM10: 14.55 μg/m3
Carbon Monoxide: 371.11 μg/m3
Nitrogen Dioxide: 41.31 μg/m3
Sulphur Dioxide: 6.17 μg/m3
Ozone: 38.32 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

Thursday, February 5, 2026

Weather Forecast

Sunny
26.2°F
15.9°F
20.6°F
81%
0 in
0%
7%
12.1 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 7.23 μg/m3
PM10: 7.26 μg/m3
Carbon Monoxide: 253.3 μg/m3
Nitrogen Dioxide: 22.88 μg/m3
Sulphur Dioxide: 2.67 μg/m3
Ozone: 47.38 μg/m3

Astronomical

Sunrise: 6:58 AM
Sun Transit: 12:06 AM
Sunset: 5:15 PM
Daylight: 10 hrs 17 mins
Moonrise: 9:38 PM
Moon Transit: 2:44 AM
Moonset: 8:44 AM
Moon Phase: Waning Gibbous
Moon Illumination: 83.4%

Best Times for Fishing or Hunting

Major Periods

2:14 AM - 4:44 AM
4:54 PM - 7:24 PM

Minor Periods

9:08 PM - 10:38 PM
8:14 AM - 9:44 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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