Measurements:
°C
°F
CURRENT WEATHER
11:09
Bar Harbor
68°F
W 1 mph
Feels like: 68°F
Precip: 1%
World Resorts USA Bar Harbor Weather

7 Day Weather Forecast

09.15
tue
DAY
68°F
W 1 mph
precip
1%
NIGHT
50°F
NE 4 mph
precip
11%
09.16
wed
DAY
66°F
NE 11 mph
precip
8%
NIGHT
62°F
E 4 mph
precip
26%
09.17
thu
DAY
66°F
W 5 mph
precip
15%
NIGHT
60°F
NE 2 mph
precip
43%
09.18
fri
DAY
70°F
SE 17 mph
precip
2%
NIGHT
46°F
S 9 mph
precip
4%
09.19
sat
DAY
60°F
SE 6 mph
precip
1%
NIGHT
48°F
NE 5 mph
precip
13%
09.20
sun
DAY
52°F
N 8 mph
precip
80%
NIGHT
48°F
NW 4 mph
precip
42%
09.21
mon
DAY
58°F
NW 9 mph
precip
12%
NIGHT
46°F
S 6 mph
precip
14%

Bar Harbor Sea Water Temperature in September, °F

Select Year: 2026 2025 2024

The average sea surface temperature in September 2026 for Bar Harbor was 14.5°F. The maximum and minimum values were 13.6°F and 15.8°F respectively.

Bar Harbor on the Weather Map

Best Time to Visit Bar Harbor
The most sunny months:
October 13 days
September 13 days
November 13 days
The most warm months:
July 75.0 °F
August 74.5 °F
June 68.6 °F
Warmest sea temperature:
August 62.3 °F
July 60.0 °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
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