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

72°F

Conditions: Mist

Feels Like: 76.4°F

Heat Index: 68.9°F

Humidity: 94%

Wind: SSW 8.1 mph

Wind Gusts: 13.6 mph

Wind Chill: 68.9°F

Dew Point: 66.6°F

Precipitation: 0 in

Cloud Cover: 0%

Visibility: 4 mi

Air Pressure: 1016 mbar

UV Index: 0

Five Day Weather Forecast

Sat
H: 85°F
L: 69°F

Sun
H: 81°F
L: 70°F

Mon
H: 77°F
L: 65°F

Tue
H: 77°F
L: 70°F

Wed
H: 84°F
L: 72°F

Air Quality

AQI: 1 - Good

PM2.5: 51.8 μg/m3

PM10: 56.1 μg/m3

Carbon Monoxide: 154 μg/m3
Nitrogen Dioxide: 6 μg/m3
Sulphur Dioxide: 1.3 μg/m3
Ozone: 106 μg/m3

Astronomical

Sunrise: 5:36 AM
Sun Transit: 12:58 AM
Sunset: 8:21 PM
Daylight: 14 hrs 44 mins

Moonrise: 10:30 AM
Moon Transit: 4:45 PM
Moonset: 10:50 PM
Moon Phase: Waxing Crescent
Moon Illumination: 13.9%

Best Times for Fishing or Hunting

Major Periods

6:12 AM - 8:42 AM
4:15 PM - 6:45 PM

Minor Periods

10:20 PM - 11:50 PM
10:00 AM - 11:30 AM

Action Rating: 2 out of 5

Small Craft Advisory issued July 17 at 2:36PM EDT until July 19 at 12:00AM EDT by NWS Upton NY

Effective: Fri July 17, 2026, 2:36 PM
Expires: Sat July 18, 2026, 6:00 AM

* WHAT...South winds 10 to 15 kt with gusts up to 25 kt. * WHERE...Long Island Sound east of Port Jefferson and New Haven, Peconic and Gardiners Bays, and South Shore Bays from Jones Inlet through Shinnecock Bay. * WHEN...From noon Saturday to midnight EDT Saturday night. * IMPACTS...Conditions will be hazardous to small craft.

Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions.

Small Craft Advisory issued July 18 at 2:32AM EDT until July 19 at 12:00AM EDT by NWS Upton NY

Effective: Sat July 18, 2026, 2:32 AM
Expires: Sat July 18, 2026, 5:00 PM

* WHAT...Southwest winds 10 to 20 kt with gusts up to 25 kt. * WHERE...Long Island Sound east of Port Jefferson and New Haven, Peconic and Gardiners Bays, and South Shore Bays from Jones Inlet through Shinnecock Bay. * WHEN...From noon today to midnight EDT tonight. * IMPACTS...Conditions will be hazardous to small craft.

Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions.

Saturday, July 18, 2026

Weather Forecast

Conditions: Smoky haze

High Temperature: 85.3°F

Low Temperature: 68.7°F

Average Temperature: 72.5°F

Average Humidity: 90%

Precipitation: 0.46 in

Chance of Rain: 82%

Chance of Snow: 0%

Maximum Wind: 15.2 mph

UV Index: 2.1

Air Quality

AQI: 3 - Unhealthy for Sensitive Groups

PM2.5: 44.04 μg/m3

PM10: 47.86 μg/m3

Carbon Monoxide: 144.04 μg/m3
Nitrogen Dioxide: 7.38 μg/m3
Sulphur Dioxide: 1.24 μg/m3
Ozone: 110.42 μg/m3

Astronomical

Sunrise: 5:36 AM
Sun Transit: 12:58 AM
Sunset: 8:21 PM
Daylight: 14 hrs 44 mins

Moonrise: 10:30 AM
Moon Transit: 4:45 PM
Moonset: 10:50 PM
Moon Phase: Waxing Crescent
Moon Illumination: 13.9%

Best Times for Fishing or Hunting

Major Periods

6:12 AM - 8:42 AM
4:15 PM - 6:45 PM

Minor Periods

10:20 PM - 11:50 PM
10:00 AM - 11:30 AM

Action Rating: 2 out of 5

Sunday, July 19, 2026

Weather Forecast

Conditions: Sunny

High Temperature: 80.6°F

Low Temperature: 69.6°F

Average Temperature: 74.4°F

Average Humidity: 64%

Precipitation: 0.01 in

Chance of Rain: 36%

Chance of Snow: 0%

Maximum Wind: 16.3 mph

UV Index: 8.1

Air Quality

AQI: 1 - Good

PM2.5: 9.62 μg/m3

PM10: 9.73 μg/m3

Carbon Monoxide: 193.5 μg/m3
Nitrogen Dioxide: 6.74 μg/m3
Sulphur Dioxide: 1.2 μg/m3
Ozone: 94.46 μg/m3

Astronomical

Sunrise: 5:37 AM
Sun Transit: 12:58 AM
Sunset: 8:20 PM
Daylight: 14 hrs 43 mins

Moonrise: 11:37 AM
Moon Transit: 5:29 PM
Moonset: 11:11 PM
Moon Phase: Waxing Crescent
Moon Illumination: 22.6%

Best Times for Fishing or Hunting

Major Periods

6:56 AM - 9:26 AM
4:59 PM - 7:29 PM

Minor Periods

12:00 AM - 12:00 AM
11:07 AM - 12:37 AM

Action Rating: 2 out of 5

Monday, July 20, 2026

Weather Forecast

Conditions: Sunny

High Temperature: 76.6°F

Low Temperature: 64.7°F

Average Temperature: 71.4°F

Average Humidity: 48%

Precipitation: 0 in

Chance of Rain: 2%

Chance of Snow: 0%

Maximum Wind: 10.5 mph

UV Index: 8.6

Air Quality

AQI: 1 - Good

PM2.5: 7.8 μg/m3

PM10: 8.76 μg/m3

Carbon Monoxide: 168.08 μg/m3
Nitrogen Dioxide: 6.35 μg/m3
Sulphur Dioxide: 0.9 μg/m3
Ozone: 81.63 μg/m3

Astronomical

Sunrise: 5:38 AM
Sun Transit: 12:58 AM
Sunset: 8:19 PM
Daylight: 14 hrs 41 mins

Moonrise: 12:43 AM
Moon Transit: 6:12 PM
Moonset: 12:11 AM
Moon Phase: Waxing Crescent
Moon Illumination: 32.7%

Best Times for Fishing or Hunting

Major Periods

7:40 AM - 10:10 AM
5:42 PM - 8:12 PM

Minor Periods

12:13 AM - 1:43 PM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Tuesday, July 21, 2026

Weather Forecast

Conditions: Partly Cloudy

High Temperature: 76.6°F

Low Temperature: 69.8°F

Average Temperature: 72.7°F

Average Humidity: 73%

Precipitation: 0.67 in

Chance of Rain: 74%

Chance of Snow: 0%

Maximum Wind: 18.8 mph

UV Index: 5.5

Air Quality

AQI: 1 - Good

PM2.5: 10.81 μg/m3

PM10: 14.56 μg/m3

Carbon Monoxide: 139.99 μg/m3
Nitrogen Dioxide: 4.17 μg/m3
Sulphur Dioxide: 0.72 μg/m3
Ozone: 96.21 μg/m3

Astronomical

Sunrise: 5:39 AM
Sun Transit: 12:58 AM
Sunset: 8:18 PM
Daylight: 14 hrs 39 mins

Moonrise: 1:47 PM
Moon Transit: 6:56 PM
Moonset: 12:33 AM
Moon Phase: First Quarter
Moon Illumination: 43.7%

Best Times for Fishing or Hunting

Major Periods

8:23 AM - 10:53 AM
6:26 PM - 8:56 PM

Minor Periods

1:17 PM - 2:47 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Wednesday, July 22, 2026

Weather Forecast

Conditions: Patchy rain nearby

High Temperature: 84.3°F

Low Temperature: 71.9°F

Average Temperature: 77.9°F

Average Humidity: 73%

Precipitation: 0.1 in

Chance of Rain: 60%

Chance of Snow: 0%

Maximum Wind: 15.7 mph

UV Index: 7

Air Quality

AQI: 1 - Good

PM2.5: 5.57 μg/m3

PM10: 6.8 μg/m3

Carbon Monoxide: 162.33 μg/m3
Nitrogen Dioxide: 6.02 μg/m3
Sulphur Dioxide: 0.73 μg/m3
Ozone: 77 μg/m3

Astronomical

Sunrise: 5:40 AM
Sun Transit: 12:58 AM
Sunset: 8:18 PM
Daylight: 14 hrs 38 mins

Moonrise: 2:52 PM
Moon Transit: 7:42 PM
Moonset: 12:58 AM
Moon Phase: First Quarter
Moon Illumination: 55.0%

Best Times for Fishing or Hunting

Major Periods

9:08 AM - 11:38 AM
7:12 PM - 9:42 PM

Minor Periods

2:22 PM - 3:52 PM
12:00 AM - 12:00 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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Water Temperature of Great South Bay in West Sayville, NY

Current Water Temperature

Temperature Locations

Local Points of Interest

Nearby Water Temperatures

Weather for West Sayville, New York

Current Weather

Five Day Weather Forecast

Air Quality

Astronomical

Best Times for Fishing or Hunting

Major Periods

Minor Periods

Small Craft Advisory issued July 17 at 2:36PM EDT until July 19 at 12:00AM EDT by NWS Upton NY

Small Craft Advisory issued July 18 at 2:32AM EDT until July 19 at 12:00AM EDT by NWS Upton NY

Weather Forecast

Air Quality

Astronomical

Best Times for Fishing or Hunting

Major Periods

Minor Periods

Weather Forecast

Air Quality

Astronomical

Best Times for Fishing or Hunting

Major Periods

Minor Periods

Weather Forecast

Air Quality

Astronomical

Best Times for Fishing or Hunting

Major Periods

Minor Periods

Weather Forecast

Air Quality

Astronomical

Best Times for Fishing or Hunting

Major Periods

Minor Periods

Weather Forecast

Air Quality

Astronomical

Best Times for Fishing or Hunting

Major Periods

Minor Periods

Webcams Near West Sayville, NY

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