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

71.1°F
Light rain
Light rain
71.1°F
70.8°F
90%
SW 12.5 mph
18.9 mph
69.7°F
68.9°F
0.02 in
100%
9 mi
1005 mbar
0

Five Day Weather Forecast

Moderate rain
Mon
H: 78°F
L: 66°F
Sunny
Tue
H: 72°F
L: 59°F
Patchy rain nearby
Wed
H: 73°F
L: 63°F
Patchy rain nearby
Thu
H: 86°F
L: 68°F
Patchy rain nearby
Fri
H: 79°F
L: 66°F

Air Quality

AQI: 1 - Good
PM2.5: 10.5 μg/m3
PM10: 13.2 μg/m3
Carbon Monoxide: 123 μg/m3
Nitrogen Dioxide: 4.2 μg/m3
Sulphur Dioxide: 0.9 μg/m3
Ozone: 105 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

Coastal Flood Statement issued June 14 at 3:03PM EDT until June 14 at 11:00PM EDT by NWS Upton NY

Effective: Sun June 14, 2026, 3:03 PM
Expires: Sun June 14, 2026, 11:00 PM

* WHAT...For the High Rip Current Risk, dangerous rip currents. For the Coastal Flood Statement, up to one quarter foot of inundation above ground level expected in vulnerable areas near the waterfront and shoreline. * WHERE...Southeast Suffolk County. * WHEN...For the High Rip Current Risk, until 9 PM EDT this evening. For the Coastal Flood Statement, from 7 PM to 11 PM EDT this evening. * IMPACTS...Brief minor flooding of the more vulnerable locations near the waterfront and shoreline. Life-threatening rip currents are likely for all people entering the surf zone. Anyone visiting the beaches should stay out of the surf. Rip currents can sweep even the best swimmers away from shore into deeper water.

Do not drive through flooded roadways. If you enter the surf zone, always have a flotation device with you and swim near a lifeguard. If caught in a rip current, relax and float, and do not swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and yell or wave for help.


Rip Current Statement issued June 14 at 3:03PM EDT until June 14 at 9:00PM EDT by NWS Upton NY

Effective: Sun June 14, 2026, 3:03 PM
Expires: Sun June 14, 2026, 9:00 PM

* WHAT...Dangerous rip currents. * WHERE...Kings (Brooklyn) and Southwest Suffolk Counties. * WHEN...Until 9 PM EDT this evening. * IMPACTS...Life-threatening rip currents are likely for all people entering the surf zone. Anyone visiting the beaches should stay out of the surf. Rip currents can sweep even the best swimmers away from shore into deeper water.

If you enter the surf zone, always have a flotation device with you and swim near a lifeguard. If caught in a rip current, relax and float, and do not swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and yell or wave for help.


Rip Current Statement issued June 14 at 3:03PM EDT until June 14 at 9:00PM EDT by NWS Upton NY

Effective: Sun June 14, 2026, 3:03 PM
Expires: Sun June 14, 2026, 11:00 PM

* WHAT...For the High Rip Current Risk, dangerous rip currents. For the Coastal Flood Statement, up to one quarter foot of inundation above ground level expected in vulnerable areas near the waterfront and shoreline. * WHERE...Southeast Suffolk County. * WHEN...For the High Rip Current Risk, until 9 PM EDT this evening. For the Coastal Flood Statement, from 7 PM to 11 PM EDT this evening. * IMPACTS...Brief minor flooding of the more vulnerable locations near the waterfront and shoreline. Life-threatening rip currents are likely for all people entering the surf zone. Anyone visiting the beaches should stay out of the surf. Rip currents can sweep even the best swimmers away from shore into deeper water.

Do not drive through flooded roadways. If you enter the surf zone, always have a flotation device with you and swim near a lifeguard. If caught in a rip current, relax and float, and do not swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and yell or wave for help.


Coastal Flood Statement issued June 14 at 3:03PM EDT until June 15 at 11:00PM EDT by NWS Upton NY

Effective: Sun June 14, 2026, 3:03 PM
Expires: Mon June 15, 2026, 6:00 AM

* WHAT...For the High Rip Current Risk, dangerous rip currents. For the Coastal Flood Advisory, up to one half foot of inundation above ground level expected in vulnerable areas near the waterfront and shoreline. For the Coastal Flood Statement, up to one quarter foot of inundation above ground level expected in vulnerable areas near the waterfront and shoreline. * WHERE...Southern Nassau County. * WHEN...For the High Rip Current Risk, until 9 PM EDT this evening. For the Coastal Flood Advisory, from 6 PM to 10 PM EDT this evening. For the Coastal Flood Statement, Monday evening. * 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. Life-threatening rip currents are likely for all people entering the surf zone. Anyone visiting the beaches should stay out of the surf. Rip currents can sweep even the best swimmers away from shore into deeper water.

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. If you enter the surf zone, always have a flotation device with you and swim near a lifeguard. If caught in a rip current, relax and float, and do not swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and yell or wave for help.


Coastal Flood Advisory issued June 14 at 3:03PM EDT until June 14 at 10:00PM EDT by NWS Upton NY

Effective: Sun June 14, 2026, 3:03 PM
Expires: Mon June 15, 2026, 6:00 AM

* WHAT...For the High Rip Current Risk, dangerous rip currents. For the Coastal Flood Advisory, up to one half foot of inundation above ground level expected in vulnerable areas near the waterfront and shoreline. For the Coastal Flood Statement, up to one quarter foot of inundation above ground level expected in vulnerable areas near the waterfront and shoreline. * WHERE...Southern Nassau County. * WHEN...For the High Rip Current Risk, until 9 PM EDT this evening. For the Coastal Flood Advisory, from 6 PM to 10 PM EDT this evening. For the Coastal Flood Statement, Monday evening. * 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. Life-threatening rip currents are likely for all people entering the surf zone. Anyone visiting the beaches should stay out of the surf. Rip currents can sweep even the best swimmers away from shore into deeper water.

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. If you enter the surf zone, always have a flotation device with you and swim near a lifeguard. If caught in a rip current, relax and float, and do not swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and yell or wave for help.


Monday, June 15, 2026

Weather Forecast

Moderate rain
77.8°F
65.7°F
72.2°F
64%
0.36 in
62%
0%
13.6 mph
9


Air Quality

AQI: 1 - Good
PM2.5: 6.43 μg/m3
PM10: 7.03 μg/m3
Carbon Monoxide: 126.67 μg/m3
Nitrogen Dioxide: 6.74 μg/m3
Sulphur Dioxide: 0.84 μg/m3
Ozone: 89.42 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

Sunny
71.7°F
58.5°F
66°F
51%
0 in
2%
0%
12.1 mph
8.3


Air Quality

AQI: 1 - Good
PM2.5: 7.06 μg/m3
PM10: 8.19 μg/m3
Carbon Monoxide: 124.75 μg/m3
Nitrogen Dioxide: 6.65 μg/m3
Sulphur Dioxide: 1.19 μg/m3
Ozone: 78.42 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

Patchy rain nearby
72.8°F
63.3°F
67.8°F
69%
0.03 in
38%
0%
11.4 mph
8.2


Air Quality

AQI: 1 - Good
PM2.5: 10.18 μg/m3
PM10: 13.76 μg/m3
Carbon Monoxide: 120.21 μg/m3
Nitrogen Dioxide: 5.65 μg/m3
Sulphur Dioxide: 0.88 μg/m3
Ozone: 88.5 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

Thursday, June 18, 2026

Weather Forecast

Patchy rain nearby
86.1°F
67.6°F
75.8°F
76%
0.04 in
57%
0%
22.1 mph
9.1


Air Quality

AQI: 1 - Good
PM2.5: 11.58 μg/m3
PM10: 15.74 μg/m3
Carbon Monoxide: 131.27 μg/m3
Nitrogen Dioxide: 4.17 μg/m3
Sulphur Dioxide: 0.66 μg/m3
Ozone: 101.63 μg/m3

Astronomical

Sunrise: 5:21 AM
Sun Transit: 12:53 AM
Sunset: 8:27 PM
Daylight: 15 hrs 6 mins
Moonrise: 9:14 AM
Moon Transit: 4:32 PM
Moonset: 12:07 AM
Moon Phase: Waxing Crescent
Moon Illumination: 10.4%

Best Times for Fishing or Hunting

Major Periods

5:56 AM - 8:26 AM
4:02 PM - 6:32 PM

Minor Periods

8:44 AM - 10:14 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Friday, June 19, 2026

Weather Forecast

Patchy rain nearby
79.1°F
66.2°F
70.7°F
78%
0.18 in
71%
0%
16.8 mph
1.4


Air Quality

AQI: 1 - Good
PM2.5: 3.74 μg/m3
PM10: 3.88 μg/m3
Carbon Monoxide: 151 μg/m3
Nitrogen Dioxide: 6.41 μg/m3
Sulphur Dioxide: 1.19 μg/m3
Ozone: 81.56 μg/m3

Astronomical

Sunrise: 5:21 AM
Sun Transit: 12:53 AM
Sunset: 8:27 PM
Daylight: 15 hrs 6 mins
Moonrise: 10:29 AM
Moon Transit: 5:22 PM
Moonset: 12:38 AM
Moon Phase: Waxing Crescent
Moon Illumination: 18.3%

Best Times for Fishing or Hunting

Major Periods

6:48 AM - 9:18 AM
4:52 PM - 7:22 PM

Minor Periods

9:59 AM - 11:29 AM
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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