Measurements:
°C
°F
Westerly
46°F
SE 7 mph
Feels like: 44°F
Precip: 0%
World Resorts USA Westerly Weather

Westerly Sea Water Temperature

Current Sea Water Temperature:
+39.4°F
Maximum Sea Water Temperature in January: 47.2°F
Minimum Sea Water Temperature in January: 37.6°F
Average water temperature in January: 42.8°F

Sea Water Temperature for the Last 10 Days:

January 08 39.4°F January 03 40.4°F
January 07 39.4°F January 02 41.0°F
January 06 39.4°F January 01 41.4°F
January 05 39.8°F December 31 42.0°F
January 04 40.0°F December 30 42.6°F

When is the Warmest Sea for Westerly?

According to our data for the last three years for Westerly 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 Westerly was 71.5°F. The maximum and minimum values were 69.8°F and 74.0°F respectively.

Sea Water Temperature in July

Select Year: 2025 2024 2023

The average sea surface temperature in July 2025 for Westerly was 70.4°F. The maximum and minimum values were 66.2°F and 73.6°F respectively.

Sea Water Temperature in September

Select Year: 2025 2024 2023

The average sea surface temperature in September 2025 for Westerly was 70.2°F. The maximum and minimum values were 68.6°F and 72.0°F respectively.

Best Time to Visit Westerly
The most sunny months:
November 17 days
October 14 days
December 14 days
The most warm months:
July 82.6 °F
August 81.0 °F
June 75.0 °F
Warmest sea temperature:
August 72.2 °F
July 70.7 °F
September 70.4 °F
The most cold months:
January 35.4 °F
February 36.7 °F
December 40.1 °F
The most rainy months:
October 4 days
July 3 days
November 3 days
The most windy months:
March 11 mph
April 10 mph
December 10 mph

Westerly 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
Westerly
Local time: 15:30
08 jan, thursday
1800 40°F
SE
4 mph
2100 36°F
SE
4 mph
09 jan, friday
0000 34°F
E
2 mph
0300 34°F
E
2 mph
0600 32°F
N
3 mph
0900 36°F
N
5 mph
1200 38°F
N
11 mph
1500 40°F
N
12 mph