Cos Cob Harbor, CT Weather Forecast and Current Conditions
| Day | Sky | High / Low | Precip | Wind | Humidity | |
|---|---|---|---|---|---|---|
|
Wed Jun 10 |
 |
Showers Late Close Hourly |
-º / 70º | 40% | WSW 7 mph | 92% |
| 10pm |  |
Mostly Cloudy | 76º | 17% | SSW 6 mph | 81% |
| 11pm | |
Mostly Cloudy | 76º | 15% | SW 6 mph | 83% |
|
Thu Jun 11 |
 |
Mostly Cloudy View Hourly |
93º / 71º | 24% | W 9 mph | 66% |
| 12am | |
Mostly Cloudy | 75º | 15% | WSW 6 mph | 84% |
| 1am |  |
Cloudy | 72º | 15% | WSW 6 mph | 95% |
| 2am | |
Cloudy | 72º | 20% | WSW 6 mph | 97% |
| 3am |  |
Showers | 71º | 41% | WSW 6 mph | 99% |
| 4am | |
Mostly Cloudy | 71º | 22% | WSW 6 mph | 100% |
| 5am | |
Mostly Cloudy | 71º | 21% | WSW 6 mph | 100% |
| 6am | |
Mostly Cloudy | 71º | 21% | W 7 mph | 100% |
| 7am | |
Mostly Cloudy | 72º | 20% | W 6 mph | 95% |
| 8am | |
Mostly Cloudy | 75º | 7% | W 7 mph | 87% |
| 9am |  |
Partly Cloudy | 78º | 5% | W 8 mph | 81% |
| 10am | |
Partly Cloudy | 82º | 3% | W 8 mph | 72% |
| 11am | |
Mostly Cloudy | 85º | 3% | W 8 mph | 66% |
| 12pm | |
Partly Cloudy | 87º | 1% | WNW 9 mph | 63% |
| 1pm | |
Mostly Cloudy | 89º | 0% | WNW 9 mph | 59% |
| 2pm | |
Mostly Cloudy | 90º | 15% | WNW 9 mph | 57% |
| 3pm | |
Mostly Cloudy | 91º | 15% | WNW 9 mph | 52% |
| 4pm | |
Cloudy | 92º | 15% | WNW 9 mph | 50% |
| 5pm | |
Cloudy | 91º | 15% | W 9 mph | 54% |
| 6pm | |
Cloudy | 89º | 24% | WNW 9 mph | 58% |
| 7pm | |
Cloudy | 86º | 24% | W 8 mph | 62% |
| 8pm | |
Cloudy | 83º | 18% | W 7 mph | 69% |
| 9pm | |
Cloudy | 78º | 11% | W 5 mph | 81% |
| 10pm | |
Cloudy | 76º | 7% | WNW 6 mph | 87% |
| 11pm | |
Mostly Cloudy | 76º | 8% | W 5 mph | 86% |
|
Fri Jun 12 |
|
Partly Cloudy View Hourly |
93º / 68º | 24% | W 8 mph | 62% |
| 12am | |
Mostly Cloudy | 76º | 7% | WNW 5 mph | 84% |
| 1am |  |
Partly Cloudy | 75º | 8% | W 5 mph | 87% |
| 2am | |
Partly Cloudy | 75º | 6% | W 5 mph | 87% |
| 3am | |
Partly Cloudy | 74º | 6% | WNW 5 mph | 89% |
| 4am | |
Mostly Cloudy | 73º | 6% | WNW 5 mph | 91% |
| 5am | |
Mostly Cloudy | 72º | 6% | WNW 5 mph | 92% |
| 6am | |
Partly Cloudy | 73º | 6% | WNW 4 mph | 90% |
| 7am | |
Partly Cloudy | 75º | 5% | WNW 5 mph | 85% |
| 8am | |
Partly Cloudy | 79º | 4% | WNW 5 mph | 77% |
| 9am | |
Partly Cloudy | 82º | 3% | WNW 6 mph | 71% |
| 10am | |
Partly Cloudy | 84º | 2% | WNW 6 mph | 67% |
| 11am |  |
Sunny | 86º | 6% | W 7 mph | 63% |
| 12pm | |
Sunny | 88º | 3% | W 7 mph | 59% |
| 1pm | |
Sunny | 89º | 2% | WSW 8 mph | 56% |
| 2pm |  |
Mostly Sunny | 90º | 7% | WSW 8 mph | 54% |
| 3pm | |
Mostly Sunny | 91º | 17% | W 8 mph | 51% |
| 4pm | |
Partly Cloudy | 90º | 13% | WSW 7 mph | 51% |
| 5pm | |
Mostly Cloudy | 89º | 24% | WSW 8 mph | 55% |
| 6pm |  |
Scattered Thunderstorms | 87º | 42% | W 8 mph | 59% |
| 7pm |  |
Isolated Thunderstorms | 83º | 34% | WSW 9 mph | 69% |
| 8pm | |
Cloudy | 81º | 24% | WNW 7 mph | 75% |
| 9pm |  |
Isolated Thunderstorms | 78º | 32% | WNW 7 mph | 82% |
|
Sat Jun 13 |
|
Sunny | 87º / 67º | 2% | NW 9 mph | 47% |
|
Sun Jun 14 |
|
Partly Cloudy | 86º / 64º | 16% | SSW 15 mph | 49% |
|
Mon Jun 15 |
|
Partly Cloudy | 81º / 62º | 18% | WNW 8 mph | 50% |
|
Tue Jun 16 |
|
Few Showers | 74º / 61º | 33% | WSW 8 mph | 58% |
|
Wed Jun 17 |
|
Partly Cloudy | 78º / 63º | 19% | SW 10 mph | 58% |
-
Buoy Data
For Cos Cob Harbor, CT -
Wind Forecast
In Cos Cob Harbor, CT -
Radar
In Cos Cob Harbor, CT -
Marine Forecast
In Cos Cob Harbor, CT
Weather Radar for Cos Cob Harbor, CT See Radar
* Playback displays weather for the past 6 hours.
NOAA Weather Marine Forecast for Cos Cob Harbor, CT
SSW wind 5 to 8 kt. A chance of showers and thunderstorms before midnight, then a slight chance of showers between midnight and 2am. Seas 1 ft or less.
W wind 6 to 8 kt. A chance of showers and thunderstorms, mainly after 5pm. Seas 1 ft or less.
W wind 5 to 7 kt. A chance of showers and thunderstorms before 11pm, then a chance of showers between 11pm and 2am. Seas 1 ft or less.
Variable winds less than 5 kt becoming WSW 5 to 7 kt in the afternoon. A chance of showers between 2pm and 5pm, then a chance of showers and thunderstorms after 5pm. Seas 1 ft or less.
W wind 6 to 8 kt becoming NW after midnight. A chance of showers and thunderstorms before 11pm, then a chance of showers between 11pm and 2am. Seas 1 ft or less.
NW wind around 8 kt. Sunny. Seas 1 ft or less.
WNW wind around 6 kt becoming variable and less than 5 kt in the evening. Clear. Seas 1 ft or less.
Variable winds less than 5 kt becoming SSW 8 to 13 kt in the afternoon. Sunny. Seas 1 ft or less.
SSW wind 7 to 12 kt becoming W after midnight. A chance of showers. Seas around 1 ft.
NOAA Buoy Data Near Cos Cob Harbor, CT See Map
Wind Speed Forecast for Cos Cob Harbor, CT
| Thursday | Friday | |||||||||||
| Wind Speed (MPH) | 6 | 6 | 7 | 8 | 9 | 9 | 6 | 5 | 4 | 6 | 8 | 8 |
| 2am | 6am | 10am | 2pm | 6pm | 10pm | 2am | 6am | 10am | 2pm | 6pm | 10pm | |
| MPH | 6 | 6 | 7 | 8 | 9 | 9 | 6 | 5 | 4 | 6 | 8 | 8 |
| DIR | SSW | WSW | W | W | WNW | WNW | WNW | W | WNW | WNW | WSW | W |
Current Weather Conditions In Cos Cob Harbor, CT
As Of: 37 minutes ago
- 76ºF
- 76ºF
- 6mph
- 0º (SSW)
- 6mph
- Mostly Cloudy
- 10mi
- 29.77"
- 81%
- 0ºF
The weather right now in Cos Cob Harbor, CT is Mostly Cloudy. The current temperature is 76°F, and the expected high and low for today, Wednesday, June 10, 2026, are -° high temperature and 70°F low temperature. The wind is currently blowing at 6 miles per hour, and coming from the South Southwest. The wind is gusting to 6 mph. With the wind and the atmosphere the temperature feels like 76° Fahrenheit. Expected precipitation is 17 percent, with current humidity at 81 percent, and air pressure at 29.77 in. Visibility is 10 nautical miles. There are 2 current weather alert(s).
...HEAT ADVISORY REMAINS IN EFFECT FROM NOON THURSDAY TO 8 PM EDT FRIDAY...
WHAT: Heat index values up to 100 expected.
WHERE: In Connecticut, Northern Fairfield, Northern Middlesex,
Northern New Haven, Southern Fairfield, and Southern New Haven
Counties. In New York, Northern Nassau, Northwest Suffolk,
Southern Nassau, and Southwest Suffolk Counties.
WHEN: From noon Thursday to 8 PM EDT Friday.
IMPACTS: Hot temperatures and high humidity may cause heat
illnesses.
PRECAUTIONARY / PREPAREDNESS ACTIONS:
A Heat Advisory is issued when the combination of heat and humidity
is expected to make it feel like it is 95 to 99 degrees for two or
more consecutive days, or 100 to 104 degrees for any length of time.
Seniors and those with chronic health problems or mental health
conditions are at an increased risk. Homes without air conditioning
can be much hotter than outdoor temperatures.
Use air conditioning to stay cool at home or go to a place that has
air conditioning. If you don't have home air conditioning, continue
to seek out cool spaces each day as long as it remains hot, and for
a few days after if your home is still hot. Check on vulnerable
friends, family members and neighbors.
To reduce risk during outdoor work, the Occupational Safety and
Health Administration recommends scheduling frequent rest breaks in
shaded or air conditioned environments. Anyone overcome by heat
should be moved to a cool and shaded location. Heat stroke is an
emergency! In cases of heat stroke call 9 1 1.
&&
...AIR QUALITY ALERT IN EFFECT FROM 11 AM TO 11 PM EDT THURSDAY...
The Connecticut Department of Energy and Environmental Protection
has issued an Air Quality Action Day for the following counties:
Southern Fairfield, Southern New Haven, Southern Middlesex, and
southern New London.
from 11 AM to 11 PM EDT Thursday.
An Air Quality Action Day means that Ground Level Ozone within the
region may approach or exceed unhealthy standards. For additional
information, please visit the Connecticut Department of Energy and
Environmental Protection Web site at http://www.ct.gov/deep/aqi
