World Resorts USA Mount Desert Island Weather

Mount Desert Island sea water temperature

Current sea water temperature:
+37.9°F
Minimum sea water temperature in April: 44.6°F
Maximum sea water temperature in April: 36.0°F
Average sea water temperature in April: 40.7°F

Sea water temperature for the last 10 days:

April 9 37.9°F April 4 37.0°F
April 8 37.2°F April 3 37.4°F
April 7 37.6°F April 2 36.9°F
April 6 37.6°F April 1 37.0°F
April 5 38.3°F March 31 36.9°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.

Best time for vacation in Mount Desert Island

Sunniest months:
November 13 days
September 13 days
October 13 days
Warmest months:
July 71.9 °F
August 71.3 °F
June 66.4 °F
Warmest sea temp:
August 61.6 °F
July 59.8 °F
September 58.6 °F
Coldest months:
January 28.9 °F
February 30.1 °F
December 34.8 °F
Rainiest months:
December 3 days
October 3 days
March 2 days
Windiest months:
December 10.7 mph
March 10.5 mph
February 10.4 mph

Mount Desert Island on a weather map

Mount Desert Island
+30°F
N 4 mph
Feels like: +25°F
Precip.: 0%
Places in USA:
Name
°F
+37°F
+72°F
+72°F
+68°F
+59°F
+70°F
+72°F
+68°F
+34°F
+61°F
+55°F
+66°F
+66°F
+63°F
+50°F
24 Hours Forecast
Mount Desert Island
Local time: 05:36
April 09, thursday
0600
30°F
N
4 mph
0900
39°F
N
9 mph
1200
45°F
N
12 mph
1500
46°F
N
14 mph
1800
41°F
N
12 mph
2100
36°F
N
12 mph
April 10, friday
0000
36°F
N
13 mph
0300
36°F
N
12 mph
Units of measurement: °C / °F