Local weather forecast

Weather in Stony Brook, NY

Updated 2026-08-11 13:00 local time · ZIP codes 11790, 11794

Cloudy
Now83°F

Cloudy

High / Low88° / 72°
Rain chance36%
Wind5 mph
Weather alerts

Active alerts

2
Coastal Flood Statement issued August 11 at 2:34AM EDT until August 12 at 12:00AM EDT by NWS Upton NY

* WHAT...Up to one half 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...This evening. * IMPACTS...Brief minor flooding of the most vulnerable locations near the waterfront and shoreline * ADDITIONAL DETAILS...Additional rounds of localized minor flooding are likely with the Wednesday Night and Thursday Night high tides. Minor coastal flooding could be a bit more widespread with the Wednesday night high tide.

Safety instructions

Do not drive through flooded roadways.

Coastal Flood Statement issued August 11 at 2:34AM EDT until August 11 at 9:00PM EDT by NWS Upton NY

* WHAT...Up to one half foot of inundation above ground level expected in vulnerable areas near the waterfront and shoreline. * WHERE...Southern Queens and Southern Nassau Counties. * WHEN...This evening. * IMPACTS...Brief minor flooding of the most vulnerable locations near the waterfront and shoreline. * ADDITIONAL DETAILS...Additional rounds of localized minor flooding are likely with the Wednesday Night and Thursday Night high tides. Minor coastal flooding could be a bit more widespread with the Wednesday night high tide.

Safety instructions

Do not drive through flooded roadways.

Hourly

Next hours

NowCloudy83°6% rain
2 PMSunny87°4% rain
3 PMSunny88°3% rain
4 PMSunny87°3% rain
5 PMSunny87°2% rain
6 PMSunny85°3% rain
7 PMSunny83°3% rain
8 PMClear79°5% rain
9 PMPatchy rain nearby76°35% rain
10 PMPatchy rain nearby75°48% rain
11 PMClear74°11% rain
12 AMClear74°13% rain
Forecast

3-day weather forecast

Today2026-08-11
Sunny
88° 72°Sunny
Rain 36%Gust 11 mph
Tomorrow2026-08-12
Sunny
81° 66°Sunny
Rain 68%Gust 10 mph
Thursday2026-08-13
Patchy rain nearby
82° 72°Patchy rain nearby
Rain 57%Gust 8 mph
Conditions

Weather details

Feels like89°F
Humidity66%
Pressure29.84 inHg
Visibility10 mi
Wind5 mph W
Wind gusts8 mph
Precipitation0.00 in
UV index7
Daylight

Sunrise, sunset and moon

Sunrise05:58 AM
Sunset07:56 PM
Moonrise03:55 AM
Moon phaseNew Moon
Practical guide

Weather insights for today

Umbrella may help

There is a moderate rain chance, peaking near 48%.

Choose light, breathable clothing

It feels like 89°F with winds near 5 mph.

Best window: 8 PM

79°F, 5% rain chance and 7 mph wind.

Allow a little extra driving time

Visibility is around 10 mi; gusts may reach 18 mph.

Run with a few weather adjustments

Current temperature is 83°F, wind 5 mph, rain chance up to 48%.

High UV protection needed

UV index is 7. Sunscreen, shade and protective clothing are recommended.

Stony Brook weather today

Cloudy and 83°F in Stony Brook, NY. Today's high is 88°F with a 36% rain chance. Winds are around 5 mph with gusts near 8 mph. Relative humidity is 66%, pressure is 29.84 inHg, and visibility is about 10 miles.

Tonight and tomorrow in Stony Brook

Sunrise is at 05:58 AM and sunset is at 07:56 PM. Tomorrow's forecast calls for Sunny with a high near 81°F and a low near 66°F. The maximum rain chance is 68%.

Nearby

Weather near Stony Brook

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