Measurements:
°C
°F
Chatham
20°F
SE 20 mph
Feels like: 6°F
Precip: 0%
World Resorts USA Chatham Weather

Chatham Sea Water Temperature

Current Sea Water Temperature:
+37.0°F
Maximum Sea Water Temperature in January: 45.8°F
Minimum Sea Water Temperature in January: 34.0°F
Average water temperature in January: 41.0°F

Sea Water Temperature for the Last 10 Days:

January 29 37.0°F January 24 38.4°F
January 28 34.0°F January 23 39.4°F
January 27 37.6°F January 22 39.4°F
January 26 37.8°F January 21 38.6°F
January 25 38.8°F January 20 39.8°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
August 13 days
June 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 34.8 °F
February 35.3 °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
Chicago +16
Hawaii +74
Honolulu +74
Houston +62
Las Vegas +48
Los Angeles +56
Maui +68
Miami +64
Miami Beach +70
New York +12
San Diego +58
San Francisco +50
Sarasota +58
Tampa +60
Washington +12
24 Hours Weather Forecast
Chatham
Local time: 11:51
29 jan, thursday
1200 20°F
SE
20 mph
1500 22°F
E
18 mph
1800 16°F
E
19 mph
2100 12°F
E
21 mph
30 jan, friday
0000 12°F
E
20 mph
0300 12°F
E
21 mph
0600 10°F
E
23 mph
0900 8°F
E
22 mph