Measurements:
°C
°F
Mount Desert Island
56°F
S 6 mph
Feels like: 56°F
Precip: 4%
World Resorts USA Mount Desert Island Weather August Weather in Mount Desert Island

Mount Desert Island Weather: August

Average Day Temperature: 74.9°F
Average Night Temperature: 62.2°F
Sea Water Temperature: 62.9°F
Number of Sunny Days: 11 days
Sunshine Hours: 13.3 - 14.6 hours
Number of Rainy Days: 1 day
Precipitation Totals: 0.9 in

Air Temperature in August, °F

Select Year: 2026 2025 2024

The highest day temperature in August 2026 was 98°F. The lowest night temperature was 55°F. The average values for day and night temperatures during August were 82.3°F и 63.0°F respectivly.

Mount Desert Island Water Sea Temperature in August, °F

Select Year: 2026 2025 2024

The average sea surface temperature in August 2026 for Mount Desert Island was 62.3°F. The maximum and minimum values were 59.6°F and 65.8°F respectively.

Sunny, Cloudy and Gloomy days

You can expect various weather conditions during August. Be ready for sunny, cloudy or even gloomy days.

Precipitation Totals in August, in

Precipitation total in August for Mount Desert Island is 0.9 in. It makes august one of the least rainy months of the year.

Wind Speed in August, mph

The average wind speed in August is 6.3 mph. It makes August the most windless month of the year for Mount Desert Island.

Average Sunny Hours Per Day

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Mount Desert Island in August is 7.5 hours.

Best Time to Visit Mount Desert Island
The most sunny months:
October 13 days
September 13 days
November 13 days
The most warm months:
July 75.5 °F
August 74.9 °F
June 69.2 °F
Warmest sea temperature:
August 62.8 °F
July 60.7 °F
September 59.6 °F
The most cold months:
January 26.6 °F
February 27.9 °F
December 33.1 °F
The most rainy months:
December 3 days
October 3 days
March 2 days
The most windy months:
December 11 mph
March 10 mph
February 10 mph

Mount Desert Island on the Weather Map

USA Resorts:
NAME
Boston +62
Chicago +66
Hawaii +80
Las Vegas +80
Los Angeles +72
Maui +66
Miami +88
Myrtle Beach +78
New York +66
Panama City Beach +90
San Diego +70
San Francisco +60
Santa Monica +70
Sarasota +86
Washington +66
24 Hours Weather Forecast
Mount Desert Island
Local time: 10:32
15 sep, tuesday
1200 66°F
S
2 mph
1500 68°F
N
7 mph
1800 58°F
N
5 mph
2100 50°F
NE
3 mph
16 sep, wednesday
0000 50°F
NE
2 mph
0300 54°F
NE
3 mph
0600 54°F
N
4 mph
0900 58°F
N
6 mph