Nearby Harbors
41.0167’ N, 73.5967’ W

Cos Cob Harbor, CT

45°
H -°
L 44°
NW
7mph
High tide
3:47 am
Photo Credits

Cos Cob Harbor, CT Weather Forecast and Current Conditions

Day Sky High / Low Precip Wind Humidity
Fri
Oct 30 		Clear -º / 44º 2% NW 7 mph 72%
Sat
Oct 31 		Sunny
View Hourly 		59º / 39º 2% NNW 10 mph 52%
4am Clear 45º 1% NW 7 mph 71%
5am Clear 45º 2% NW 7 mph 73%
6am Clear 44º 2% NW 7 mph 76%
7am Clear 44º 2% NW 6 mph 76%
8am Sunny 45º 2% NNW 6 mph 74%
9am Sunny 48º 1% NNW 7 mph 66%
10am Sunny 51º 0% NNW 9 mph 55%
11am Sunny 52º 0% NNW 10 mph 48%
12pm Sunny 54º 0% NNW 9 mph 44%
1pm Sunny 56º 0% NNW 8 mph 42%
2pm Sunny 57º 0% NW 8 mph 41%
3pm Sunny 57º 0% NW 8 mph 42%
4pm Sunny 57º 0% NW 8 mph 42%
5pm Sunny 56º 0% NW 7 mph 43%
6pm Clear 53º 0% NNW 5 mph 51%
7pm Clear 50º 0% NNW 4 mph 59%
8pm Clear 49º 0% NNW 3 mph 60%
9pm Clear 47º 0% NNW 3 mph 64%
10pm Clear 46º 1% NNW 3 mph 68%
11pm Mostly Clear 45º 1% NNW 4 mph 70%
Sun
Nov 1 		Partly Cloudy
View Hourly 		61º / 44º 5% W 6 mph 55%
12am Partly Cloudy 45º 1% NNW 5 mph 72%
1am Partly Cloudy 43º 2% NNW 5 mph 74%
1am Mostly Clear 43º 3% NNW 5 mph 74%
2am Partly Cloudy 42º 3% NNW 5 mph 75%
3am Partly Cloudy 42º 4% NNW 5 mph 74%
4am Partly Cloudy 41º 4% NNW 5 mph 76%
5am Partly Cloudy 40º 5% NNW 5 mph 78%
6am Partly Cloudy 40º 5% NNW 5 mph 79%
7am Partly Cloudy 41º 6% NW 4 mph 77%
8am Partly Cloudy 45º 4% NW 4 mph 74%
9am Partly Cloudy 48º 2% NW 5 mph 66%
10am Partly Cloudy 52º 0% NW 5 mph 58%
11am Partly Cloudy 55º 0% WNW 5 mph 51%
12pm Partly Cloudy 57º 0% W 5 mph 46%
1pm Partly Cloudy 58º 0% W 5 mph 43%
2pm Partly Cloudy 59º 0% W 6 mph 43%
3pm Sunny 59º 0% W 6 mph 43%
4pm Mostly Sunny 59º 0% W 5 mph 45%
5pm Partly Cloudy 56º 0% WSW 3 mph 52%
6pm Partly Cloudy 53º 0% SW 2 mph 59%
7pm Partly Cloudy 51º 0% SW 2 mph 62%
8pm Partly Cloudy 50º 1% SW 3 mph 64%
9pm Partly Cloudy 49º 1% WSW 3 mph 68%
10pm Mostly Clear 48º 1% WSW 3 mph 72%
11pm Mostly Clear 48º 2% W 4 mph 75%
Mon
Nov 2 		Partly Cloudy
View Hourly 		66º / 46º 2% WSW 9 mph 52%
12am Partly Cloudy 47º 2% W 4 mph 77%
1am Partly Cloudy 47º 3% W 4 mph 77%
2am Partly Cloudy 46º 3% WSW 4 mph 77%
Tue
Nov 3 		Partly Cloudy 69º / 51º 5% SW 6 mph 57%
Wed
Nov 4 		Partly Cloudy 71º / 58º 11% SE 9 mph 73%
Thu
Nov 5 		Showers 69º / 58º 53% SSE 12 mph 81%
Fri
Nov 6 		Rain 65º / 56º 61% N 9 mph 82%

Weather Radar for Cos Cob Harbor, CT See Radar

See Radar Map

* Playback displays weather for the past 6 hours.

NOAA Weather Marine Forecast for Cos Cob Harbor, CT

Saturday
High : 57ºF
N wind 6 to 9 kt. Sunny. Seas 1 ft or less.
Saturday Night
Low : 41ºF
Variable winds 5 kt or less. Mostly clear. Seas 1 ft or less.
Sunday
High : 62ºF
Variable winds 5 kt or less. Mostly sunny. Seas 1 ft or less.
Sunday Night
Low : 45ºF
Variable winds 5 kt or less. Mostly clear. Seas 1 ft or less.
Monday
High : 66ºF
WSW wind around 6 kt. Mostly sunny. Seas 1 ft or less.
Monday Night
Low : 50ºF
Variable winds 5 kt or less. Partly cloudy. Seas 1 ft or less.
Tuesday
High : 67ºF
Variable winds less than 5 kt becoming SW around 6 kt in the afternoon. Mostly sunny. Seas 1 ft or less.
Tuesday Night
Low : 52ºF
Variable winds 5 kt or less. Mostly cloudy. Seas 1 ft or less.
Wednesday
High : 69ºF
Variable winds less than 5 kt becoming S 5 to 7 kt in the morning. Mostly sunny. Seas 1 ft or less.

NOAA Buoy Data Near Cos Cob Harbor, CT See Map

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    Featured Local Businesses

    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) 769835545624
    8am12pm4pm8pm12am4am8am12pm4pm8pm12am4am
    MPH 769835545624
    DIR NWNNWNNWNWNNWNNWNNWNWWNWWSWW

    Current Weather Conditions In Cos Cob Harbor, CT

    As Of: 28 minutes ago

    • 45ºF
    • 42ºF
    • 7mph
    • 0º (NW)
    • 7mph
    • Clear
    • 10mi
    • 30.31"
    • 71%
    • 0ºF

    The weather right now in Cos Cob Harbor, CT is Clear. The current temperature is 45°F, and the expected high and low for today, Saturday, October 31, 2026, are -° high temperature and 44°F low temperature. The wind is currently blowing at 7 miles per hour, and coming from the Northwest. The wind is gusting to 7 mph. With the wind and the atmosphere the temperature feels like 42° Fahrenheit. Expected precipitation is 1 percent, with current humidity at 71 percent, and air pressure at 30.31 in. Visibility is 10 nautical miles. There are 1 current weather alert(s).

    Weather Alerts
    Small Craft Advisory - 2:20am Sat Oct 31 2026

    ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 AM EDT EARLY THIS MORNING...

    WHAT: Northwest winds 10 to 15 kt with gusts up to 25 kt and
    seas 1 to 3 feet.

    WHERE: Long Island Sound.

    WHEN: Until 6 AM EDT early this morning.

    IMPACTS: Conditions will be hazardous to small craft.

    PRECAUTIONARY / PREPAREDNESS ACTIONS:

    Inexperienced mariners, especially those operating smaller
    vessels, should avoid navigating in hazardous conditions.

    &&

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