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

73.9°F
Clear
Clear
77.1°F
72.7°F
76%
NW 8.7 mph
14.1 mph
70.2°F
56.3°F
0 in
0%
9 mi
1009 mbar
0

Five Day Weather Forecast

Sunny
Sat
H: 93°F
L: 69°F
Patchy rain nearby
Sun
H: 78°F
L: 69°F
Patchy rain nearby
Mon
H: 77°F
L: 63°F
Patchy rain nearby
Tue
H: 67°F
L: 63°F
Sunny
Wed
H: 73°F
L: 62°F

Air Quality

AQI: 1 - Good
PM2.5: 4.5 μg/m3
PM10: 4.8 μg/m3
Carbon Monoxide: 134 μg/m3
Nitrogen Dioxide: 6.7 μg/m3
Sulphur Dioxide: 1.2 μg/m3
Ozone: 78 μg/m3

Astronomical

Sunrise: 5:20 AM
Sun Transit: 12:52 AM
Sunset: 8:25 PM
Daylight: 15 hrs 5 mins
Moonrise: 3:27 AM
Moon Transit: 11:17 AM
Moonset: 7:18 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.1%

Best Times for Fishing or Hunting

Major Periods

12:36 AM - 3:06 AM
10:47 AM - 1:17 PM

Minor Periods

6:48 PM - 8:18 PM
2:57 AM - 4:27 AM

Action Rating: 3 out of 5

Coastal Flood Statement issued June 13 at 12:06AM EDT until June 13 at 9:00PM EDT by NWS Upton NY

Effective: Sat June 13, 2026, 12:06 AM
Expires: Sat June 13, 2026, 4:00 PM

* WHAT...Up to one half foot of inundation above ground level expected in vulnerable areas near the waterfront and shoreline. * WHERE...Southern Nassau County. * WHEN...From this afternoon through this evening. * IMPACTS...Brief minor flooding of the more vulnerable locations near the waterfront and shoreline.

Do not drive through flooded roadways.


Coastal Flood Statement issued June 13 at 12:06AM EDT until June 14 at 12:00AM EDT by NWS Upton NY

Effective: Sat June 13, 2026, 12:06 AM
Expires: Sat June 13, 2026, 4:00 PM

* WHAT...Up to one foot of inundation above ground level expected in vulnerable areas near the waterfront and shoreline. * WHERE...Southern Fairfield County. * WHEN...This evening. * IMPACTS...Brief minor flooding of the more vulnerable locations near the waterfront and shoreline.

Do not drive through flooded roadways.
Saturday, June 13, 2026

Weather Forecast

Sunny
93.4°F
68.7°F
79.3°F
51%
0 in
2%
0%
13 mph
9.2


Air Quality

AQI: 1 - Good
PM2.5: 8.62 μg/m3
PM10: 9.35 μg/m3
Carbon Monoxide: 136.63 μg/m3
Nitrogen Dioxide: 12.94 μg/m3
Sulphur Dioxide: 1.16 μg/m3
Ozone: 95.13 μg/m3

Astronomical

Sunrise: 5:20 AM
Sun Transit: 12:52 AM
Sunset: 8:25 PM
Daylight: 15 hrs 5 mins
Moonrise: 3:27 AM
Moon Transit: 11:17 AM
Moonset: 7:18 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.1%

Best Times for Fishing or Hunting

Major Periods

12:36 AM - 3:06 AM
10:47 AM - 1:17 PM

Minor Periods

6:48 PM - 8:18 PM
2:57 AM - 4:27 AM

Action Rating: 3 out of 5

Sunday, June 14, 2026

Weather Forecast

Patchy rain nearby
78.2°F
68.5°F
73.2°F
63%
0.04 in
37%
0%
18.1 mph
9.2


Air Quality

AQI: 1 - Good
PM2.5: 12.9 μg/m3
PM10: 15.16 μg/m3
Carbon Monoxide: 146.83 μg/m3
Nitrogen Dioxide: 15.79 μg/m3
Sulphur Dioxide: 1.57 μg/m3
Ozone: 92 μg/m3

Astronomical

Sunrise: 5:20 AM
Sun Transit: 12:52 AM
Sunset: 8:25 PM
Daylight: 15 hrs 5 mins
Moonrise: 4:18 AM
Moon Transit: 12:23 AM
Moonset: 8:33 PM
Moon Phase: New
Moon Illumination: 0.7%

Best Times for Fishing or Hunting

Major Periods

1:41 AM - 4:11 AM
11:53 AM - 2:23 PM

Minor Periods

8:03 PM - 9:33 PM
3:48 AM - 5:18 AM

Action Rating: 5 out of 5

Monday, June 15, 2026

Weather Forecast

Patchy rain nearby
76.5°F
63.1°F
70.1°F
63%
0.08 in
57%
0%
14.5 mph
8.6


Air Quality

AQI: 1 - Good
PM2.5: 4.72 μg/m3
PM10: 5.18 μg/m3
Carbon Monoxide: 121.58 μg/m3
Nitrogen Dioxide: 4.98 μg/m3
Sulphur Dioxide: 0.81 μg/m3
Ozone: 81.71 μg/m3

Astronomical

Sunrise: 5:20 AM
Sun Transit: 12:52 AM
Sunset: 8:26 PM
Daylight: 15 hrs 5 mins
Moonrise: 5:21 AM
Moon Transit: 1:31 PM
Moonset: 9:37 PM
Moon Phase: New
Moon Illumination: 3.8%

Best Times for Fishing or Hunting

Major Periods

2:48 AM - 5:18 AM
1:01 PM - 3:31 PM

Minor Periods

9:07 PM - 10:37 PM
4:51 AM - 6:21 AM

Action Rating: 5 out of 5

Tuesday, June 16, 2026

Weather Forecast

Patchy rain nearby
66.7°F
62.5°F
64.7°F
65%
0.02 in
36%
0%
15 mph
6.3


Air Quality

AQI: 1 - Good
PM2.5: 7.66 μg/m3
PM10: 9.1 μg/m3
Carbon Monoxide: 128.9 μg/m3
Nitrogen Dioxide: 8.98 μg/m3
Sulphur Dioxide: 1.22 μg/m3
Ozone: 71.96 μg/m3

Astronomical

Sunrise: 5:20 AM
Sun Transit: 12:53 AM
Sunset: 8:26 PM
Daylight: 15 hrs 6 mins
Moonrise: 6:36 AM
Moon Transit: 2:37 PM
Moonset: 10:28 PM
Moon Phase: New
Moon Illumination: 1.0%

Best Times for Fishing or Hunting

Major Periods

3:56 AM - 6:26 AM
2:07 PM - 4:37 PM

Minor Periods

9:58 PM - 11:28 PM
6:06 AM - 7:36 AM

Action Rating: 3 out of 5

Wednesday, June 17, 2026

Weather Forecast

Sunny
72.7°F
62.2°F
67.5°F
76%
0 in
8%
0%
14.3 mph
1.3


Air Quality

AQI: 1 - Good
PM2.5: 12.98 μg/m3
PM10: 15.23 μg/m3
Carbon Monoxide: 179.67 μg/m3
Nitrogen Dioxide: 25.91 μg/m3
Sulphur Dioxide: 1.53 μg/m3
Ozone: 45.33 μg/m3

Astronomical

Sunrise: 5:20 AM
Sun Transit: 12:53 AM
Sunset: 8:26 PM
Daylight: 15 hrs 6 mins
Moonrise: 7:56 AM
Moon Transit: 3:38 PM
Moonset: 11:07 PM
Moon Phase: Waxing Crescent
Moon Illumination: 4.6%

Best Times for Fishing or Hunting

Major Periods

4:59 AM - 7:29 AM
3:08 PM - 5:38 PM

Minor Periods

12:00 AM - 12:00 AM
7:26 AM - 8:56 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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