Measurements:
°C
°F
New Haven
40°F
W 6 mph
Feels like: 36°F
Precip: 87%
World Resorts USA New Haven Weather

New Haven Sea Water Temperature

Current Sea Water Temperature:
+39.6°F
Maximum Sea Water Temperature in April: 53.2°F
Minimum Sea Water Temperature in April: 38.2°F
Average water temperature in April: 45.8°F

Sea Water Temperature for the Last 10 Days:

April 03 39.6°F March 29 39.2°F
April 02 41.6°F March 28 39.6°F
April 01 38.4°F March 27 37.4°F
March 31 38.4°F March 26 37.0°F
March 30 38.8°F March 25 36.4°F

When is the Warmest Sea for New Haven?

According to our data for the last three years for New Haven the highest average sea water temperature was in August, July and September.

Average Water Temperature by Month, °F

Sea Water Temperature in August

Select Year: 2025 2024 2023

The average sea surface temperature in August 2025 for New Haven was 76.4°F. The maximum and minimum values were 73.2°F and 79.4°F respectively.

Sea Water Temperature in July

Select Year: 2025 2024 2023

The average sea surface temperature in July 2025 for New Haven was 75.2°F. The maximum and minimum values were 69.8°F and 79.6°F respectively.

Sea Water Temperature in September

Select Year: 2025 2024 2023

The average sea surface temperature in September 2025 for New Haven was 72.8°F. The maximum and minimum values were 71.4°F and 75.4°F respectively.

Best Time to Visit New Haven
The most sunny months:
November 16 days
September 14 days
October 13 days
The most warm months:
July 84.0 °F
August 81.9 °F
June 76.4 °F
Warmest sea temperature:
August 77.0 °F
July 75.7 °F
September 73.8 °F
The most cold months:
January 34.2 °F
February 35.2 °F
December 39.4 °F
The most rainy months:
July 3 days
August 3 days
April 3 days
The most windy months:
January 10 mph
November 10 mph
December 10 mph

New Haven on the Weather Map

USA Resorts:
NAME
Chicago +46
Hawaii +74
Honolulu +74
Houston +74
Las Vegas +54
Los Angeles +56
Maui +66
Miami +74
Miami Beach +78
New York +40
San Diego +58
San Francisco +50
Sarasota +72
Tampa +72
Washington +48
24 Hours Weather Forecast
New Haven
Local time: 05:46
03 apr, friday
0600 40°F
W
6 mph
0900 40°F
NW
4 mph
1200 44°F
NE
6 mph
1500 50°F
NE
11 mph
1800 52°F
NE
11 mph
2100 52°F
NE
7 mph
04 apr, saturday
0000 52°F
NE
9 mph
0300 50°F
E
7 mph