Current sea water temperature:
+40.5°F
| Minimum sea water temperature in December: | 48.4°F |
| Maximum sea water temperature in December: | 40.5°F |
| Average sea water temperature in December: | 44.5°F |
| more information | |
14 days
forecast
forecast
| Mount Desert Island |
monthly
weather
weather
| Mount Desert Island |
Sea water temperature for the last 10 days:
| December 27 | 40.5°F | December 22 | 41.0°F |
| December 26 | 41.4°F | December 21 | 41.0°F |
| December 25 | 41.2°F | December 20 | 41.5°F |
| December 24 | 41.0°F | December 19 | 41.4°F |
| December 23 | 40.8°F | December 18 | 42.8°F |
Monthly sea water temperature, °F
When is the warmest sea in Mount Desert Island?
Based on the data about daily sea water temperature for the last three years the warmest sea in Mount Desert Island was noticed in August, July and September.
Monthly Sea Temperatures in Mount Desert Island, °F
Sea water temperature in August, °F
Show year:
2025
2024
2023
The average sea water temperature in August of 2025 was 60.2°F. The highest and lowest sea temperatures during the month were 63.0°F and 57.0°F.
Sea water temperature in July, °F
Show year:
2025
2024
2023
The average sea water temperature in July of 2025 was 58.2°F. The highest and lowest sea temperatures during the month were 60.6°F and 54.9°F.
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 58.6°F. The highest and lowest sea temperatures during the month were 60.6°F and 56.7°F.
current
weather
weather
| Mount Desert Island |
weather in
December
December
| Mount Desert Island |
Best time for vacation in Mount Desert Island
Mount Desert Island on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Mount Desert Island
Local time: 15:38
December 27, saturday
1800
18°F
SE
12 mph
12 mph
2100
18°F
SE
13 mph
13 mph
December 28, sunday
0000
16°F
SE
13 mph
13 mph
0300
16°F
SE
13 mph
13 mph
0600
16°F
SE
14 mph
14 mph
0900
19°F
SE
14 mph
14 mph
1200
27°F
SE
14 mph
14 mph
1500
30°F
SE
14 mph
14 mph
