Local weather forecast

Weather in Cos Cob, CT

Updated 2026-08-11 13:30 local time · ZIP codes 06807

Sunny
Now82°F

Sunny

High / Low91° / 69°
Rain chance36%
Wind7 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

NowSunny82°4% rain
3 PMSunny87°3% rain
4 PMSunny91°2% rain
5 PMSunny89°2% rain
6 PMPartly Cloudy85°5% rain
7 PMPartly Cloudy81°10% rain
8 PMPatchy rain nearby75°32% rain
9 PMPatchy rain nearby74°50% rain
10 PMClear74°15% rain
11 PMClear73°15% rain
12 AMClear72°14% rain
1 AMPatchy rain nearby74°39% rain
Forecast

3-day weather forecast

Today2026-08-11
Sunny
91° 69°Sunny
Rain 36%Gust 9 mph
Tomorrow2026-08-12
Sunny
86° 67°Sunny
Rain 57%Gust 9 mph
Thursday2026-08-13
Sunny
87° 68°Sunny
Rain 57%Gust 12 mph
Conditions

Weather details

Feels like85°F
Humidity66%
Pressure29.84 inHg
Visibility10 mi
Wind7 mph WNW
Wind gusts8 mph
Precipitation0.00 in
UV index6
Daylight

Sunrise, sunset and moon

Sunrise06:00 AM
Sunset07:58 PM
Moonrise03:56 AM
Moon phaseNew Moon
Practical guide

Weather insights for today

Take an umbrella

Rain chance reaches about 50% over the next 12 hours.

Light layers should work

It feels like 85°F with winds near 7 mph.

Best window: 7 PM

81°F, 10% rain chance and 8 mph wind.

Allow a little extra driving time

Visibility is around 10 mi; gusts may reach 14 mph.

Run with a few weather adjustments

Current temperature is 82°F, wind 7 mph, rain chance up to 50%.

High UV protection needed

UV index is 6. Sunscreen, shade and protective clothing are recommended.

Cos Cob weather today

Sunny and 82°F in Cos Cob, CT. Today's high is 91°F with a 36% rain chance. Winds are around 7 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 Cos Cob

Sunrise is at 06:00 AM and sunset is at 07:58 PM. Tomorrow's forecast calls for Sunny with a high near 86°F and a low near 67°F. The maximum rain chance is 57%.

Nearby

Weather near Cos Cob

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