Bar Harbor weather in August 2025

Q: How hot is it in Bar Harbor in August?

Daytime temperatures usually reach 25°C in Bar Harbor in August with low heat and humidity, falling to 14°C at night.

Q: How sunny is it in Bar Harbor in August?

There are normally 7 hours of bright sunshine each day in Bar Harbor in August - that's 52% of daylight hours.

Q: How warm is the sea around Bar Harbor in August?

The average sea temperature around Bar Harbor in August is 13°C.

Q: Does it rain in Bar Harbor in August?

There are usually 11 days with some rain in Bar Harbor in August and the average monthly rainfall is 74mm.

Q: What is the chance of a cyclone in Bar Harbor in August?

On average less than 1 day in August in Bar Harbor is likely to be affected by the passage of one or more tropical storms.

Expect 77°F daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in Bar Harbor in August. Check more long-term weather averages for Bar Harbor in August before you book your next holiday to Maine in 2025/2026.

77
77°F max day temperature
7
7 hours of sunshine per day
11
11 days with some rainfall
57
57°F min night temperature
14
14 hours of daylight per day
L
Low heat & humidity
2.9
2.9 inches of monthly rainfall
7
7 (High) UV index
55
55°F sea temperature

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The August weather guide for Maine (Bar Harbor) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C) | Imperial (°F)

More about the USA

How hot is it in Bar Harbor in August?

Daytime temperatures usually reach 77°F in Bar Harbor in August with low heat and humidity, falling to 57°F at night.

How sunny is it in Bar Harbor in August?

There are normally 7 hours of bright sunshine each day in Bar Harbor in August - that's 52% of daylight hours.

How warm is the sea around Bar Harbor in August?

The average sea temperature around Bar Harbor in August is 55°F.

Does it rain in Bar Harbor in August?

There are usually 11 days with some rain in Bar Harbor in August and the average monthly rainfall is 2.9 inches.

What is the chance of a hurricane in Bar Harbor in August?

On average less than 1 day in August in Bar Harbor is likely to be affected by the passage of one or more tropical storms.

Bar Harbor August sunrise & sunset times

Browse the sunrise and sunset times for Bar Harbor in August 2025. Select a month to view Bar Harbor sunrise and sunset times for the next 12 months.

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Date	Sunrise times	Sunset times
Friday, 1st August 2025	04:20	18:57
Saturday, 16th August 2025	04:37	18:36
Sunday, 31st August 2025	04:55	18:10

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Maine - quick facts
Flight time^✝	11 hours
Time difference	UK -5 hours
Language(s)	English
Currency	US Dollar
Electricity	A + B plug (120V)
Driving side	Right
Visa^✝	Yes
Why visit?	Nature
Tourist info	Maine Office of Tourism