Measurements:
°C
°F
New Haven
14°F
SE 9 mph
Feels like: 2°F
Precip: 0%
World Resorts USA New Haven Weather

New Haven Sea Water Temperature

Current Sea Water Temperature:
+31.0°F
Maximum Sea Water Temperature in January: 44.4°F
Minimum Sea Water Temperature in January: 30.6°F
Average water temperature in January: 38.4°F

Sea Water Temperature for the Last 10 Days:

January 29 31.0°F January 24 32.8°F
January 28 30.6°F January 23 34.2°F
January 27 31.8°F January 22 34.4°F
January 26 33.4°F January 21 33.8°F
January 25 32.8°F January 20 35.0°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 34.5 °F
February 35.8 °F
December 39.4 °F
The most rainy months:
July 3 days
April 3 days
August 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 0
Hawaii +74
Honolulu +74
Houston +38
Las Vegas +48
Los Angeles +56
Maui +68
Miami +64
Miami Beach +70
New York +12
San Diego +60
San Francisco +50
Sarasota +58
Tampa +58
Washington +12
24 Hours Weather Forecast
New Haven
Local time: 10:53
29 jan, thursday
1200 14°F
SE
9 mph
1500 18°F
SE
10 mph
1800 14°F
E
14 mph
2100 6°F
SE
14 mph
30 jan, friday
0000 4°F
E
11 mph
0300 4°F
SE
10 mph
0600 0°F
SE
9 mph
0900 2°F
SE
10 mph