Current Sea Water Temperature:
+43.2°F
| Maximum Sea Water Temperature in December: | 48.2°F |
| Minimum Sea Water Temperature in December: | 40.0°F |
| Average water temperature in December: | 44.1°F |
| detailed information | |
Sea Water Temperature for the Last 10 Days:
| December 13 | 43.2°F | December 08 | 44.8°F |
| December 12 | 44.0°F | December 07 | 45.2°F |
| December 11 | 44.2°F | December 06 | 45.8°F |
| December 10 | 44.2°F | December 05 | 45.4°F |
| December 09 | 44.8°F | December 04 | 46.0°F |
When is the Warmest Sea for Mount Desert Island?
According to our data for the last three years for Mount Desert Island the highest average sea water temperature was in August, July and September.
Average Water Temperature by Month, °F
Sea Water Temperature in August
The average sea surface temperature in August 2025 for Mount Desert Island was 61.4°F. The maximum and minimum values were 57.8°F and 64.4°F respectively.
Sea Water Temperature in July
The average sea surface temperature in July 2025 for Mount Desert Island was 59.1°F. The maximum and minimum values were 55.4°F and 61.8°F respectively.
Sea Water Temperature in September
The average sea surface temperature in September 2025 for Mount Desert Island was 59.6°F. The maximum and minimum values were 57.4°F and 61.8°F respectively.
USA Resorts:
NAME
F°
| Chicago |  |
+6 |
| Hawaii |  |
+80 |
| Honolulu |  |
+86 |
| Houston | |
+78 |
| Las Vegas |  |
+76 |
| Los Angeles | |
+72 |
| Maui | |
+76 |
| Miami | |
+80 |
| Miami Beach | |
+82 |
| New York |  |
+36 |
| San Diego | |
+64 |
| San Francisco | |
+52 |
| Sarasota | |
+76 |
| Tampa | |
+78 |
| Washington | |
+44 |
Countries:
NAME
POPULARITY
24 Hours Weather Forecast
Mount Desert Island
Local time: 17:27
13 dec, saturday
| 1800 |  |
32°F | NE 15 mph |
| 2100 | |
32°F | E 7 mph |
14 dec, sunday
| 0000 | |
30°F | E 7 mph |
| 0300 | |
30°F | E 6 mph |
| 0600 | |
28°F | SE 9 mph |
| 0900 | |
28°F | SE 8 mph |
| 1200 | |
28°F | S 9 mph |
| 1500 |  |
28°F | S 11 mph |