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

46°F
Sunny
Sunny
42.3°F
43.9°F
63%
SSW 7.2 mph
12.1 mph
39.9°F
43.5°F
0 in
25%
9 mi
1019 mbar
3.4

Five Day Weather Forecast

Partly Cloudy
Sat
H: 48°F
L: 28°F
Overcast
Sun
H: 33°F
L: 24°F
Sunny
Mon
H: 30°F
L: 16°F
Moderate or heavy snow showers
Tue
H: 37°F
L: 22°F
Patchy rain nearby
Wed
H: 44°F
L: 38°F

Air Quality

AQI: 1 - Good
PM2.5: 33.35 μg/m3
PM10: 42.55 μg/m3
Carbon Monoxide: 550.85 μg/m3
Nitrogen Dioxide: 59.35 μg/m3
Sulphur Dioxide: 6.45 μg/m3
Ozone: 56 μg/m3

Astronomical

Sunrise: 6:28 AM
Sun Transit: 12:04 AM
Sunset: 5:42 PM
Daylight: 11 hrs 14 mins
Moonrise: 2:39 PM
Moon Transit: 10:13 PM
Moonset: 5:01 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 90.1%

Best Times for Fishing or Hunting

Major Periods

11:36 AM - 2:06 PM
12:00 AM - 12:00 AM

Minor Periods

2:09 PM - 3:39 PM
4:31 AM - 6:01 AM

Action Rating: 3 out of 5

Special Weather Statement issued February 28 at 5:03AM EST by NWS Upton NY

Effective: Sat February 28, 2026, 5:03 AM
Expires: Sat February 28, 2026, 9:00 AM

Areas of fog have developed over portions of the region and are expected to expand this morning, lingering into mid-morning. At the same time, temperatures in most spots will be at or below freezing. This combination, along with any refreezing of melted snow, could result in slippery conditions of untreated surfaces due to black ice. Use caution if traveling this morning as black ice can make conditions very slick. Locally reduced visibility will be possible as well. Leave extra room between you and the car in front of you. Additionally, pedestrians should use caution walking on any untreated surfaces.


Special Weather Statement issued February 28 at 2:34AM EST by NWS Upton NY

Effective: Sat February 28, 2026, 2:34 AM
Expires: Sat February 28, 2026, 9:00 AM

Areas of fog have developed over portions of the region and are expected to expand early this morning, lingering into mid- morning. At the same time, temperatures in most spots will be at or below freezing. This combination, along with any refreezing of melted snow, could result in slippery conditions of untreated surfaces due to black ice. Use caution if traveling this morning as black ice can make conditions very slick. Locally reduced visibility will be possible as well. Leave extra room between you and the car in front of you. Additionally, pedestrians should use caution walking on any untreated surfaces.


Saturday, February 28, 2026

Weather Forecast

Partly Cloudy
47.7°F
27.9°F
37.6°F
94%
0 in
0%
0%
7.2 mph
0.7


Air Quality

AQI: 2 - Moderate
PM2.5: 19.54 μg/m3
PM10: 25.7 μg/m3
Carbon Monoxide: 325.25 μg/m3
Nitrogen Dioxide: 27.81 μg/m3
Sulphur Dioxide: 3.43 μg/m3
Ozone: 63.76 μg/m3

Astronomical

Sunrise: 6:28 AM
Sun Transit: 12:04 AM
Sunset: 5:42 PM
Daylight: 11 hrs 14 mins
Moonrise: 2:39 PM
Moon Transit: 10:13 PM
Moonset: 5:01 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 90.1%

Best Times for Fishing or Hunting

Major Periods

11:36 AM - 2:06 PM
12:00 AM - 12:00 AM

Minor Periods

2:09 PM - 3:39 PM
4:31 AM - 6:01 AM

Action Rating: 3 out of 5

Sunday, March 1, 2026

Weather Forecast

Overcast
32.5°F
24.1°F
31.5°F
88%
0 in
0%
0%
14.3 mph
0.2


Air Quality

AQI: 2 - Moderate
PM2.5: 16.64 μg/m3
PM10: 19.26 μg/m3
Carbon Monoxide: 410.49 μg/m3
Nitrogen Dioxide: 38.73 μg/m3
Sulphur Dioxide: 4.07 μg/m3
Ozone: 58.28 μg/m3

Astronomical

Sunrise: 6:26 AM
Sun Transit: 12:04 AM
Sunset: 5:44 PM
Daylight: 11 hrs 17 mins
Moonrise: 3:53 PM
Moon Transit: 11:04 PM
Moonset: 5:34 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 95.8%

Best Times for Fishing or Hunting

Major Periods

12:30 AM - 3:00 PM
12:00 AM - 12:00 AM

Minor Periods

3:23 PM - 4:53 PM
5:04 AM - 6:34 AM

Action Rating: 3 out of 5

Monday, March 2, 2026

Weather Forecast

Sunny
30.4°F
16°F
23°F
68%
0 in
0%
0%
13.6 mph
0.6


Air Quality

AQI: 1 - Good
PM2.5: 5.89 μg/m3
PM10: 6.29 μg/m3
Carbon Monoxide: 212.45 μg/m3
Nitrogen Dioxide: 11.79 μg/m3
Sulphur Dioxide: 2.91 μg/m3
Ozone: 82.12 μg/m3

Astronomical

Sunrise: 6:25 AM
Sun Transit: 12:04 AM
Sunset: 5:45 PM
Daylight: 11 hrs 20 mins
Moonrise: 5:05 PM
Moon Transit: 11:51 PM
Moonset: 6:01 AM
Moon Phase: Full
Moon Illumination: 99.1%

Best Times for Fishing or Hunting

Major Periods

1:17 PM - 3:47 PM
12:00 AM - 12:00 AM

Minor Periods

4:35 PM - 6:05 PM
5:31 AM - 7:01 AM

Action Rating: 4 out of 5

Tuesday, March 3, 2026

Weather Forecast

Moderate or heavy snow showers
37.3°F
22.1°F
31°F
85%
0.38 in
70%
0%
15.9 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 14.71 μg/m3
PM10: 17.6 μg/m3
Carbon Monoxide: 255.58 μg/m3
Nitrogen Dioxide: 33.38 μg/m3
Sulphur Dioxide: 3.99 μg/m3
Ozone: 59.68 μg/m3

Astronomical

Sunrise: 6:23 AM
Sun Transit: 12:04 AM
Sunset: 5:46 PM
Daylight: 11 hrs 23 mins
Moonrise: 6:14 PM
Moon Transit: 12:00 AM
Moonset: 6:25 AM
Moon Phase: Full
Moon Illumination: 100.0%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
2:03 PM - 4:33 PM

Minor Periods

5:44 PM - 7:14 PM
5:55 AM - 7:25 AM

Action Rating: 5 out of 5

Wednesday, March 4, 2026

Weather Forecast

Patchy rain nearby
43.7°F
38.2°F
40.2°F
94%
0.11 in
83%
0%
12.1 mph
1


Air Quality

AQI: 1 - Good
PM2.5: 11.29 μg/m3
PM10: 14.93 μg/m3
Carbon Monoxide: 200.35 μg/m3
Nitrogen Dioxide: 12.59 μg/m3
Sulphur Dioxide: 2.66 μg/m3
Ozone: 77.46 μg/m3

Astronomical

Sunrise: 6:22 AM
Sun Transit: 12:04 AM
Sunset: 5:47 PM
Daylight: 11 hrs 25 mins
Moonrise: 7:20 PM
Moon Transit: 12:35 AM
Moonset: 6:47 AM
Moon Phase: Full
Moon Illumination: 98.2%

Best Times for Fishing or Hunting

Major Periods

12:05 AM - 2:35 AM
2:46 PM - 5:16 PM

Minor Periods

6:50 PM - 8:20 PM
6:17 AM - 7:47 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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