Current sea water temperature:
+44.4°F
| Minimum sea water temperature in December: | 52.5°F |
| Maximum sea water temperature in December: | 40.8°F |
| Average sea water temperature in December: | 46.8°F |
| more information | |
14 days
forecast
forecast
| Martha's Vineyard |
monthly
weather
weather
| Martha's Vineyard |
Sea water temperature for the last 10 days:
| December 21 | 44.4°F | December 16 | 44.6°F |
| December 20 | 44.6°F | December 15 | 45.7°F |
| December 19 | 44.1°F | December 14 | 46.2°F |
| December 18 | 44.1°F | December 13 | 46.4°F |
| December 17 | 44.1°F | December 12 | 47.1°F |
Monthly sea water temperature, °F
When is the warmest sea in Martha's Vineyard?
Based on the data about daily sea water temperature for the last three years the warmest sea in Martha's Vineyard was noticed in August, July and September.
Monthly Sea Temperatures in Martha's Vineyard, °F
Sea water temperature in August, °F
Show year:
2025
2024
2023
The average sea water temperature in August of 2025 was 69.0°F. The highest and lowest sea temperatures during the month were 72.1°F and 67.3°F.
Sea water temperature in July, °F
Show year:
2025
2024
2023
The average sea water temperature in July of 2025 was 68.2°F. The highest and lowest sea temperatures during the month were 71.1°F and 64.4°F.
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 67.9°F. The highest and lowest sea temperatures during the month were 69.8°F and 66.6°F.
current
weather
weather
| Martha's Vineyard |
weather in
December
December
| Martha's Vineyard |
Best time for vacation in Martha's Vineyard
Martha's Vineyard on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Martha's Vineyard
Local time: 00:16
December 22, monday
0300
30°F
SE
19 mph
19 mph
0600
27°F
SE
21 mph
21 mph
0900
28°F
SE
20 mph
20 mph
1200
32°F
SE
17 mph
17 mph
1500
36°F
SE
14 mph
14 mph
1800
36°F
SE
13 mph
13 mph
2100
34°F
E
12 mph
12 mph
December 23, tuesday
0000
36°F
E
12 mph
12 mph
