Local weather forecast

Weather in Smithtown, NY

Updated 2026-08-11 13:30 local time · ZIP codes 11787

Sunny
Now84°F

Sunny

High / Low93° / 70°
Rain chance71%
Wind6 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

NowSunny84°3% rain
2 PMSunny92°2% rain
3 PMSunny87°2% rain
4 PMSunny93°1% rain
5 PMSunny91°2% rain
6 PMSunny88°2% rain
7 PMPartly Cloudy83°9% rain
8 PMHeavy rain at times75°85% rain
9 PMPatchy rain nearby75°88% rain
10 PMPatchy rain nearby75°44% rain
11 PMClear75°15% rain
12 AMClear74°15% rain
Forecast

3-day weather forecast

Today2026-08-11
Sunny
93° 70°Sunny
Rain 71%Gust 10 mph
Tomorrow2026-08-12
Sunny
84° 66°Sunny
Rain 67%Gust 9 mph
Thursday2026-08-13
Patchy rain nearby
84° 73°Patchy rain nearby
Rain 57%Gust 7 mph
Conditions

Weather details

Feels like88°F
Humidity58%
Pressure29.82 inHg
Visibility10 mi
Wind6 mph WNW
Wind gusts7 mph
Precipitation0.00 in
UV index7
Daylight

Sunrise, sunset and moon

Sunrise05:59 AM
Sunset07:56 PM
Moonrise03:55 AM
Moon phaseNew Moon
Practical guide

Weather insights for today

Take an umbrella

Rain chance reaches about 88% over the next 12 hours.

Choose light, breathable clothing

It feels like 88°F with winds near 6 mph.

Best window: 7 PM

83°F, 9% rain chance and 7 mph wind.

Use extra caution while driving

Visibility is around 10 mi; gusts may reach 15 mph.

Running conditions are less comfortable

Current temperature is 84°F, wind 6 mph, rain chance up to 88%.

High UV protection needed

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

Smithtown weather today

Sunny and 84°F in Smithtown, NY. Today's high is 93°F with a 71% rain chance. Winds are around 6 mph with gusts near 7 mph. Relative humidity is 58%, pressure is 29.82 inHg, and visibility is about 10 miles.

Tonight and tomorrow in Smithtown

Sunrise is at 05:59 AM and sunset is at 07:56 PM. Tomorrow's forecast calls for Sunny with a high near 84°F and a low near 66°F. The maximum rain chance is 67%.

Nearby

Weather near Smithtown

New York

Popular cities in New York

View state page →