Measurements:
°C
°F
Martha's Vineyard
40°F
W 11 mph
Feels like: 36°F
Precip: 100%
World Resorts USA Martha's Vineyard Weather

Martha's Vineyard Sea Water Temperature

Current Sea Water Temperature:
+40.0°F
Maximum Sea Water Temperature in April: 52.0°F
Minimum Sea Water Temperature in April: 39.6°F
Average water temperature in April: 45.2°F

Sea Water Temperature for the Last 10 Days:

April 03 40.0°F March 29 39.8°F
April 02 39.8°F March 28 39.4°F
April 01 39.6°F March 27 38.6°F
March 31 40.2°F March 26 37.8°F
March 30 39.8°F March 25 37.8°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
September 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
April 3 days
October 3 days
The most windy months:
December 14 mph
January 14 mph
November 14 mph

Martha's Vineyard on the Weather Map

USA Resorts:
NAME
Chicago +46
Hawaii +74
Honolulu +74
Houston +74
Las Vegas +54
Los Angeles +56
Maui +66
Miami +74
Miami Beach +78
New York +40
San Diego +58
San Francisco +50
Sarasota +72
Tampa +72
Washington +48
24 Hours Weather Forecast
Martha's Vineyard
Local time: 05:46
03 apr, friday
0600 40°F
W
11 mph
0900 42°F
N
9 mph
1200 48°F
NE
8 mph
1500 52°F
NE
16 mph
1800 50°F
NE
22 mph
2100 50°F
NE
22 mph
04 apr, saturday
0000 50°F
NE
22 mph
0300 46°F
NE
22 mph