Measurements:
°C
°F
Chatham
42°F
SE 7 mph
Feels like: 38°F
Precip: 0%
World Resorts USA Chatham Weather

Chatham Sea Water Temperature

Current Sea Water Temperature:
+39.6°F
Maximum Sea Water Temperature in January: 45.8°F
Minimum Sea Water Temperature in January: 35.4°F
Average water temperature in January: 41.2°F

Sea Water Temperature for the Last 10 Days:

January 08 39.6°F January 03 37.8°F
January 07 39.4°F January 02 38.2°F
January 06 39.6°F January 01 39.8°F
January 05 38.6°F December 31 39.2°F
January 04 38.2°F December 30 40.4°F

When is the Warmest Sea for Chatham?

According to our data for the last three years for Chatham 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 Chatham was 69.8°F. The maximum and minimum values were 66.8°F and 72.6°F respectively.

Sea Water Temperature in July

Select Year: 2025 2024 2023

The average sea surface temperature in July 2025 for Chatham was 68.7°F. The maximum and minimum values were 64.2°F and 72.0°F respectively.

Sea Water Temperature in September

Select Year: 2025 2024 2023

The average sea surface temperature in September 2025 for Chatham was 67.2°F. The maximum and minimum values were 65.4°F and 70.6°F respectively.

Best Time to Visit Chatham
The most sunny months:
November 14 days
June 13 days
August 13 days
The most warm months:
July 76.9 °F
August 76.2 °F
September 70.6 °F
Warmest sea temperature:
August 70.7 °F
July 69.8 °F
September 67.2 °F
The most cold months:
January 35.2 °F
February 35.3 °F
December 40.6 °F
The most rainy months:
January 3 days
October 3 days
April 2 days
The most windy months:
December 14 mph
January 14 mph
March 14 mph

Chatham 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
Chatham
Local time: 15:30
08 jan, thursday
1800 38°F
SE
4 mph
2100 36°F
E
6 mph
09 jan, friday
0000 36°F
E
6 mph
0300 34°F
E
5 mph
0600 34°F
NE
6 mph
0900 36°F
N
9 mph
1200 40°F
N
14 mph
1500 40°F
N
17 mph