Nearby Harbors
41.0167’ N, 73.5967’ W

Cos Cob Harbor, CT

63°
H 81°
L 65°
W
3mph
Low tide
7:25 am
Photo Credits

Cos Cob Harbor, CT Weather Forecast and Current Conditions

Day Sky High / Low Precip Wind Humidity
Sun
Aug 30 		Partly Cloudy
Close Hourly 		81º / 65º 23% WSW 12 mph 67%
6am Partly Cloudy 63º 2% W 3 mph 84%
7am Partly Cloudy 63º 2% W 3 mph 85%
8am Partly Cloudy 67º 1% WSW 4 mph 77%
9am Partly Cloudy 71º 1% WSW 7 mph 65%
10am Partly Cloudy 74º 0% WSW 8 mph 60%
11am Partly Cloudy 76º 1% SW 9 mph 56%
12pm Partly Cloudy 78º 1% SW 10 mph 54%
1pm Mostly Cloudy 79º 0% SW 11 mph 56%
2pm Mostly Cloudy 80º 10% SW 11 mph 58%
3pm Mostly Cloudy 80º 24% SW 12 mph 62%
4pm Mostly Cloudy 80º 21% SW 11 mph 66%
5pm Mostly Cloudy 79º 16% SW 10 mph 69%
6pm Mostly Cloudy 78º 15% SW 9 mph 72%
7pm Cloudy 76º 6% SW 8 mph 75%
8pm Cloudy 75º 24% SW 6 mph 80%
9pm Rain 74º 60% WSW 5 mph 82%
10pm Few Showers 73º 33% W 5 mph 88%
11pm Showers 72º 35% WNW 5 mph 87%
Mon
Aug 31 		Partly Cloudy
View Hourly 		78º / 69º 7% E 7 mph 70%
12am Cloudy 72º 18% WNW 4 mph 86%
1am Cloudy 71º 12% WNW 5 mph 86%
2am Cloudy 70º 6% NW 4 mph 87%
3am Cloudy 69º 20% NNW 5 mph 86%
4am Mostly Cloudy 68º 6% NNW 6 mph 87%
5am Mostly Cloudy 68º 7% NNW 6 mph 88%
6am Partly Cloudy 67º 7% N 6 mph 89%
7am Partly Cloudy 66º 7% N 6 mph 91%
8am Partly Cloudy 68º 4% N 6 mph 87%
9am Partly Cloudy 71º 3% NNE 6 mph 80%
10am Partly Cloudy 73º 1% NE 6 mph 73%
11am Partly Cloudy 74º 1% ENE 6 mph 69%
12pm Partly Cloudy 75º 1% E 6 mph 66%
1pm Partly Cloudy 76º 1% ESE 6 mph 64%
2pm Partly Cloudy 77º 1% SE 5 mph 63%
3pm Mostly Cloudy 77º 0% SE 5 mph 62%
4pm Partly Cloudy 78º 1% SE 6 mph 62%
5pm Partly Cloudy 77º 2% SE 6 mph 63%
6pm Partly Cloudy 77º 2% SSE 6 mph 65%
7pm Cloudy 75º 4% SSE 7 mph 72%
8pm Cloudy 73º 7% SSE 7 mph 78%
9pm Mostly Cloudy 72º 6% S 6 mph 83%
10pm Cloudy 71º 17% S 6 mph 85%
11pm Cloudy 71º 17% S 5 mph 86%
Tue
Sep 1 		PM Thunderstorms
View Hourly 		82º / 68º 86% SSW 7 mph 83%
12am Rain 71º 60% S 5 mph 88%
1am Rain 70º 65% SSW 4 mph 92%
2am Light Rain 70º 61% SSW 4 mph 94%
3am Showers 71º 51% SSW 4 mph 95%
4am Showers 70º 44% SW 4 mph 96%
5am Showers 70º 50% SW 4 mph 97%
Wed
Sep 2 		Scattered Thunderstorms 75º / 68º 54% E 7 mph 87%
Thu
Sep 3 		PM Thunderstorms 82º / 68º 63% WSW 7 mph 83%
Fri
Sep 4 		Partly Cloudy 81º / 65º 24% NNW 7 mph 77%
Sat
Sep 5 		Partly Cloudy 78º / 61º 24% NNE 8 mph 68%
Sun
Sep 6 		Mostly Sunny 75º / 60º 17% ENE 8 mph 67%

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 : 82ºF
Variable winds less than 5 kt becoming SW 5 to 9 kt in the morning. A chance of showers and thunderstorms after 2pm. Seas 1 ft or less.
Tonight
Low : 68ºF
SW wind around 6 kt becoming variable and less than 5 kt after midnight. A chance of showers and thunderstorms. Seas 1 ft or less.
Monday
High : 80ºF
Variable winds 5 kt or less. A slight chance of showers after 5pm. Seas 1 ft or less.
Monday Night
Low : 69ºF
Variable winds 5 kt or less. Showers, mainly after 2am. Seas 1 ft or less.
Tuesday
High : 83ºF
Variable winds less than 5 kt becoming SW around 6 kt in the morning. Showers, with thunderstorms also possible after 2pm. Seas 1 ft or less.
Tuesday Night
Low : 69ºF
SSE wind around 6 kt becoming variable and less than 5 kt after midnight. Showers likely, mainly before 8pm. Seas 1 ft or less.
Wednesday
High : 80ºF
ENE wind around 6 kt becoming ESE in the afternoon. A chance of showers after 8am. Seas 1 ft or less.
Wednesday Night
Low : 68ºF
Variable winds 5 kt or less. A chance of showers before 8pm, then a chance of showers and thunderstorms between 8pm and 2am, then showers likely after 2am. Seas 1 ft or less.
Thursday
High : 80ºF
WSW wind around 6 kt becoming SSW in the afternoon. Showers likely, with thunderstorms also possible after 2pm. Seas 1 ft or less.

NOAA Buoy Data Near Cos Cob Harbor, CT See Map

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    Shore Thing Rentals Kayaks, Paddleboards

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    Wind Speed Forecast for Cos Cob Harbor, CT

    SundayMondayTuesday
    Wind Speed (MPH) 3811954665664
    10am2pm6pm10pm2am6am10am2pm6pm10pm2am6am
    MPH 3811954665664
    DIR WWSWSWSWWNWNNESESSESSSW

    Current Weather Conditions In Cos Cob Harbor, CT

    As Of: 4 minutes ago

    • 63ºF
    • 63ºF
    • 3mph
    • 0º (W)
    • 3mph
    • Partly Cloudy
    • 10mi
    • 30.18"
    • 84%
    • 0ºF

    The weather right now in Cos Cob Harbor, CT is Partly Cloudy. The current temperature is 63°F, and the expected high and low for today, Sunday, August 30, 2026, are 81° high temperature and 65°F low temperature. The wind is currently blowing at 3 miles per hour, and coming from the West. The wind is gusting to 3 mph. With the wind and the atmosphere the temperature feels like 63° Fahrenheit. Expected precipitation is 2 percent, with current humidity at 84 percent, and air pressure at 30.18 in. Visibility is 10 nautical miles. There are no current weather alert(s).

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