Measurements:
°C
°F
Chatham
70°F
NE 14 mph
Feels like: 70°F
Precip: 1%
World Resorts USA Chatham Weather

Chatham Sea Water Temperature

Current Sea Water Temperature:
+55.0°F
Maximum Sea Water Temperature in June: 68.6°F
Minimum Sea Water Temperature in June: 51.2°F
Average water temperature in June: 60.2°F

Sea Water Temperature for the Last 10 Days:

June 04 55.0°F May 29 55.6°F
June 03 54.4°F May 28 53.8°F
June 01 53.4°F May 27 53.6°F
May 31 53.8°F May 26 55.2°F
May 30 55.6°F May 25 53.6°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 34.5 °F
February 34.7 °F
December 40.6 °F
The most rainy months:
October 3 days
January 2 days
April 2 days
The most windy months:
January 14 mph
December 14 mph
March 14 mph

Chatham on the Weather Map

USA Resorts:
NAME
Boston +90
Chicago +76
Hawaii +78
Honolulu +78
Houston +86
Las Vegas +92
Los Angeles +70
Maui +70
Miami +82
Miami Beach +84
New York +94
San Diego +64
San Francisco +60
Sarasota +94
Tampa +92
24 Hours Weather Forecast
Chatham
Local time: 12:54
04 jun, thursday
1500 66°F
NE
19 mph
1800 64°F
NE
17 mph
2100 62°F
NE
16 mph
05 jun, friday
0000 62°F
NE
16 mph
0300 60°F
NE
14 mph
0600 60°F
E
11 mph
0900 66°F
E
9 mph
1200 70°F
E
6 mph