Measurements:
°C
°F
Edgartown
58°F
NW 16 mph
Feels like: 56°F
Precip: 100%
World Resorts USA Edgartown Weather

Edgartown Sea Water Temperature

Current Sea Water Temperature:
+53.6°F
Maximum Sea Water Temperature in May: 62.6°F
Minimum Sea Water Temperature in May: 45.8°F
Average water temperature in May: 54.3°F

Sea Water Temperature for the Last 10 Days:

May 14 53.6°F May 09 52.4°F
May 13 52.4°F May 08 52.8°F
May 12 51.4°F May 07 51.8°F
May 11 53.2°F May 06 51.2°F
May 10 52.0°F May 05 50.6°F

When is the Warmest Sea for Edgartown?

According to our data for the last three years for Edgartown 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 Edgartown was 72.4°F. The maximum and minimum values were 70.4°F and 75.8°F respectively.

Sea Water Temperature in July

Select Year: 2025 2024 2023

The average sea surface temperature in July 2025 for Edgartown was 71.5°F. The maximum and minimum values were 67.2°F and 74.0°F respectively.

Sea Water Temperature in September

Select Year: 2025 2024 2023

The average sea surface temperature in September 2025 for Edgartown was 70.2°F. The maximum and minimum values were 68.2°F and 72.4°F respectively.

Best Time to Visit Edgartown
The most sunny months:
November 15 days
October 14 days
September 13 days
The most warm months:
July 76.7 °F
August 76.0 °F
September 71.4 °F
Warmest sea temperature:
August 75.1 °F
July 73.5 °F
September 71.4 °F
The most cold months:
February 35.1 °F
January 35.1 °F
December 41.5 °F
The most rainy months:
January 3 days
October 3 days
July 2 days
The most windy months:
December 14 mph
January 14 mph
March 14 mph

Edgartown on the Weather Map

USA Resorts:
NAME
Boston +56
Chicago +56
Hawaii +78
Honolulu +78
Houston +98
Las Vegas +102
Los Angeles +76
Maui +72
Miami +90
Miami Beach +92
New York +70
San Diego +72
San Francisco +72
Sarasota +96
Tampa +96
24 Hours Weather Forecast
Edgartown
Local time: 13:59
14 may, thursday
1500 58°F
NW
16 mph
1800 58°F
NE
8 mph
2100 54°F
S
7 mph
15 may, friday
0000 52°F
E
7 mph
0300 52°F
E
8 mph
0600 52°F
SE
4 mph
0900 54°F
S
2 mph
1200 56°F
N
4 mph