Measurements:
°C
°F
Bar Harbor
64°F
E 7 mph
Feels like: 64°F
Precip: 9%
World Resorts USA Bar Harbor Weather

Bar Harbor Sea Water Temperature

Current Sea Water Temperature:
+53.8°F
Maximum Sea Water Temperature in June: 62.4°F
Minimum Sea Water Temperature in June: 48.0°F
Average water temperature in June: 54.3°F

Sea Water Temperature for the Last 10 Days:

June 24 53.8°F June 19 55.8°F
June 23 54.2°F June 18 54.8°F
June 22 55.0°F June 17 54.2°F
June 21 54.4°F June 16 54.4°F
June 20 54.4°F June 15 54.0°F

When is the Warmest Sea for Bar Harbor?

According to our data for the last three years for Bar Harbor the highest average sea water temperature was in August, July and September.

Average Water Temperature by Month, °F

Sea Water Temperature in August

Select Year: 2025 2024 2023

The average sea surface temperature in August 2025 for Bar Harbor was 60.8°F. The maximum and minimum values were 57.6°F and 64.0°F respectively.

Sea Water Temperature in July

Select Year: 2025 2024 2023

The average sea surface temperature in July 2025 for Bar Harbor was 58.2°F. The maximum and minimum values were 55.0°F and 61.2°F respectively.

Sea Water Temperature in September

Select Year: 2025 2024 2023

The average sea surface temperature in September 2025 for Bar Harbor was 59.4°F. The maximum and minimum values were 57.4°F and 62.4°F respectively.

Best Time to Visit Bar Harbor
The most sunny months:
October 13 days
September 13 days
November 13 days
The most warm months:
July 73.9 °F
August 73.4 °F
June 67.9 °F
Warmest sea temperature:
August 62.4 °F
July 60.3 °F
September 59.4 °F
The most cold months:
January 26.6 °F
February 27.7 °F
December 33.1 °F
The most rainy months:
October 3 days
March 2 days
December 2 days
The most windy months:
December 11 mph
March 11 mph
February 11 mph

Bar Harbor on the Weather Map

USA Resorts:
NAME
Chicago +66
Hawaii +80
Honolulu +80
Houston +82
Las Vegas +96
Los Angeles +66
Maui +74
Miami +80
Miami Beach +88
Myrtle Beach +78
New York +70
San Diego +68
San Francisco +58
Sarasota +84
Tampa +84
24 Hours Weather Forecast
Bar Harbor
Local time: 00:23
25 jun, thursday
0300 60°F
E
6 mph
0600 62°F
E
4 mph
0900 70°F
SE
6 mph
1200 72°F
NE
5 mph
1500 66°F
N
5 mph
1800 64°F
N
5 mph
2100 58°F
NW
4 mph
26 jun, friday
0000 56°F
NW
4 mph