Measurements:
°C
°F
Martha's Vineyard
78°F
NE 14 mph
Feels like: 80°F
Precip: 0%
World Resorts USA Martha's Vineyard Weather

Martha's Vineyard Sea Water Temperature

Current Sea Water Temperature:
+59.8°F
Maximum Sea Water Temperature in June: 73.4°F
Minimum Sea Water Temperature in June: 56.8°F
Average water temperature in June: 64.5°F

Sea Water Temperature for the Last 10 Days:

June 04 59.8°F May 29 59.2°F
June 03 59.4°F May 28 56.6°F
June 01 57.0°F May 27 58.0°F
May 31 57.8°F May 26 55.6°F
May 30 58.4°F May 25 56.8°F

When is the Warmest Sea for Martha's Vineyard?

According to our data for the last three years for Martha's Vineyard 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 Martha's Vineyard was 71.2°F. The maximum and minimum values were 69.2°F and 74.6°F respectively.

Sea Water Temperature in July

Select Year: 2025 2024 2023

The average sea surface temperature in July 2025 for Martha's Vineyard was 70.2°F. The maximum and minimum values were 66.0°F and 73.4°F respectively.

Sea Water Temperature in September

Select Year: 2025 2024 2023

The average sea surface temperature in September 2025 for Martha's Vineyard was 69.9°F. The maximum and minimum values were 68.4°F and 72.0°F respectively.

Best Time to Visit Martha's Vineyard
The most sunny months:
November 15 days
October 14 days
August 13 days
The most warm months:
July 76.7 °F
August 76.0 °F
September 71.4 °F
Warmest sea temperature:
August 74.3 °F
July 72.8 °F
September 71.1 °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
November 14 mph

Martha's Vineyard on the Weather Map

USA Resorts:
NAME
Boston +90
Chicago +76
Hawaii +78
Honolulu +78
Houston +86
Las Vegas +94
Los Angeles +68
Maui +70
Miami +82
Miami Beach +84
New York +94
San Diego +64
San Francisco +60
Sarasota +94
Tampa +92
24 Hours Weather Forecast
Martha's Vineyard
Local time: 13:18
04 jun, thursday
1500 80°F
NE
16 mph
1800 72°F
NE
15 mph
2100 62°F
NE
14 mph
05 jun, friday
0000 60°F
NE
15 mph
0300 62°F
NE
17 mph
0600 62°F
E
15 mph
0900 64°F
E
12 mph
1200 66°F
NE
11 mph