Nearby Harbors
41.0167’ N, 73.5967’ W

Cos Cob Harbor, CT

69°
H 69°
L 62°
E
8mph
Low tide
12:19 pm
Photo Credits

Cos Cob Harbor, CT Weather Forecast and Current Conditions

Day Sky High / Low Precip Wind Humidity
Sat
Sep 19 		Partly Cloudy
Close Hourly 		69º / 62º 1% E 10 mph 53%
1pm Mostly Cloudy 69º 0% E 8 mph 49%
2pm Partly Cloudy 69º 0% E 8 mph 50%
3pm Partly Cloudy 69º 0% E 6 mph 52%
4pm Partly Cloudy 68º 0% ESE 6 mph 55%
5pm Mostly Cloudy 68º 0% ESE 7 mph 57%
6pm Mostly Cloudy 67º 1% ESE 7 mph 60%
7pm Partly Cloudy 66º 1% SE 7 mph 64%
8pm Partly Cloudy 64º 2% SE 7 mph 68%
9pm Partly Cloudy 64º 2% SE 7 mph 71%
10pm Partly Cloudy 63º 2% SE 7 mph 72%
11pm Mostly Cloudy 63º 2% SE 7 mph 72%
Sun
Sep 20 		Rain
View Hourly 		68º / 57º 86% SSE 12 mph 88%
12am Partly Cloudy 63º 2% SE 7 mph 73%
1am Cloudy 63º 3% SE 7 mph 74%
2am Cloudy 63º 6% SE 7 mph 75%
3am Cloudy 63º 6% SE 7 mph 76%
4am Cloudy 64º 6% SE 8 mph 75%
5am Cloudy 64º 6% ESE 8 mph 76%
6am Cloudy 64º 17% ESE 8 mph 76%
7am Few Showers 63º 31% ESE 9 mph 77%
8am Showers 64º 52% ESE 10 mph 79%
9am Showers 64º 48% ESE 10 mph 81%
10am Showers 65º 57% SE 11 mph 83%
11am Rain 66º 86% SE 11 mph 85%
12pm Rain 66º 73% SSE 10 mph 89%
1pm Light Rain 66º 67% SSE 12 mph 91%
2pm Light Rain 67º 63% SSE 12 mph 92%
3pm Rain 67º 80% SSE 11 mph 93%
4pm Rain 68º 81% S 10 mph 93%
5pm Rain 68º 78% S 9 mph 95%
6pm Rain 68º 82% S 9 mph 96%
7pm Rain 68º 76% S 7 mph 97%
8pm Showers 67º 47% SSW 6 mph 100%
9pm Rain 67º 73% SW 6 mph 99%
10pm Showers 67º 39% WNW 5 mph 100%
11pm Showers 66º 41% NNW 6 mph 100%
Mon
Sep 21 		Partly Cloudy
View Hourly 		68º / 54º 10% NNE 13 mph 71%
12am Showers 65º 38% NNW 8 mph 99%
1am Showers 63º 38% N 9 mph 100%
2am Mostly Cloudy 62º 24% N 11 mph 100%
3am Mostly Cloudy 61º 17% N 11 mph 98%
4am Mostly Cloudy 60º 14% N 12 mph 97%
5am Mostly Cloudy 59º 11% N 11 mph 94%
6am Mostly Cloudy 58º 10% N 11 mph 93%
7am Partly Cloudy 58º 10% N 12 mph 92%
8am Partly Cloudy 59º 9% N 12 mph 86%
9am Mostly Cloudy 60º 10% N 12 mph 81%
10am Partly Cloudy 61º 6% NNE 13 mph 77%
11am Mostly Cloudy 63º 2% NNE 13 mph 72%
12pm Partly Cloudy 64º 1% NNE 12 mph 67%
Tue
Sep 22 		AM Showers 62º / 53º 37% NE 13 mph 73%
Wed
Sep 23 		Mostly Cloudy 65º / 53º 12% NE 16 mph 64%
Thu
Sep 24 		PM Showers 66º / 54º 35% NE 15 mph 62%
Fri
Sep 25 		Showers 66º / 55º 63% NNE 14 mph 64%
Sat
Sep 26 		Showers 67º / 56º 42% N 13 mph 66%

Weather Radar for Cos Cob Harbor, CT See Radar

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* Playback displays weather for the past 6 hours.

NOAA Weather Marine Forecast for Cos Cob Harbor, CT

Today
High : 69ºF
NE wind 7 to 10 kt becoming E in the afternoon. Partly sunny. Seas 1 ft or less.
Tonight
Low : 60ºF
ESE wind around 8 kt. Mostly cloudy. Seas 1 ft or less.
Sunday
High : 70ºF
SE wind around 10 kt. Rain, with thunderstorms also possible after 5pm. Seas 1 ft or less.
Sunday Night
Low : 58ºF
SSE wind 7 to 11 kt becoming NNE after midnight. Rain and possibly a thunderstorm. Seas 1 ft or less.
Monday
High : 67ºF
NNE wind 8 to 13 kt. A chance of rain before 8am. Seas 1 ft or less.
Monday Night
Low : 55ºF
NE wind 9 to 13 kt. Mostly cloudy. Seas 1 ft or less.
Tuesday
High : 63ºF
ENE wind 12 to 14 kt, with gusts as high as 20 kt. A chance of showers between 8am and 2pm. Seas around 1 ft.
Tuesday Night
Low : 52ºF
ENE wind 14 to 16 kt, with gusts as high as 24 kt. Mostly cloudy. Seas around 1 ft.
Wednesday
High : 64ºF
ENE wind around 18 kt, with gusts as high as 27 kt. Mostly cloudy. Seas around 1 ft.

NOAA Buoy Data Near Cos Cob Harbor, CT See Map

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    Featured Local Businesses

    Shore Thing Rentals Kayaks, Paddleboards

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    DiMillo's Yacht Sales office and two RIBs in the parking lot.

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    Wind Speed Forecast for Cos Cob Harbor, CT

    SaturdaySundayMonday
    Wind Speed (MPH) 8777810129691112
    5pm9pm1am5am9am1pm5pm9pm1am5am9am1pm
    MPH 8777810129691112
    DIR EESESESEESEESESSESSWNNN

    Current Weather Conditions In Cos Cob Harbor, CT

    As Of: 41 minutes ago

    • 69ºF
    • 69ºF
    • 8mph
    • 0º (E)
    • 8mph
    • Mostly Cloudy
    • 10mi
    • 30.18"
    • 49%
    • 0ºF

    The weather right now in Cos Cob Harbor, CT is Mostly Cloudy. The current temperature is 69°F, and the expected high and low for today, Saturday, September 19, 2026, are 69° high temperature and 62°F low temperature. The wind is currently blowing at 8 miles per hour, and coming from the East. The wind is gusting to 8 mph. With the wind and the atmosphere the temperature feels like 69° Fahrenheit. Expected precipitation is 0 percent, with current humidity at 49 percent, and air pressure at 30.18 in. Visibility is 10 nautical miles. There are no current weather alert(s).

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