Measurements:
°C
°F
New Haven
46°F
SE 6 mph
Feels like: 44°F
Precip: 0%
World Resorts USA New Haven Weather

New Haven Sea Water Temperature

Current Sea Water Temperature:
+36.4°F
Maximum Sea Water Temperature in January: 44.4°F
Minimum Sea Water Temperature in January: 33.0°F
Average water temperature in January: 38.8°F

Sea Water Temperature for the Last 10 Days:

January 08 36.4°F January 03 37.6°F
January 07 36.6°F January 02 36.8°F
January 06 36.6°F January 01 37.8°F
January 05 36.4°F December 31 38.2°F
January 04 37.2°F December 30 38.6°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
December 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 34.8 °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 +54
Hawaii +78
Honolulu +78
Houston +78
Las Vegas +54
Los Angeles +58
Maui +72
Miami +86
Miami Beach +80
New York +52
San Diego +64
San Francisco +52
Sarasota +82
Tampa +88
Washington +60
24 Hours Weather Forecast
New Haven
Local time: 15:29
08 jan, thursday
1800 40°F
SE
5 mph
2100 34°F
SE
4 mph
09 jan, friday
0000 30°F
S
0 mph
0300 28°F
NE
2 mph
0600 28°F
NE
3 mph
0900 32°F
N
5 mph
1200 34°F
N
8 mph
1500 36°F
N
9 mph