Bar Harbor weather in August 2025

Expect 25°C 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.

  • 25°C maximum daytime temperature in August in Bar Harbor25
    25°C max day temperature
  • 7 hours of sunshine per day
  • 11 days with some rainfall in August in Bar Harbor11
    11 days with some rainfall
  • 14°C minimum night-time temperature in August in Bar Harbor14
    14°C min night temperature
  • 14 hours of daylight per day in August in Bar Harbor14
    14 hours of daylight per day
  • Low heat & humidity in August in Bar HarborL
    Low heat & humidity
  • 74 mm monthly rainfall in August in Bar Harbor74
    74 mm of monthly rainfall
  • UV (maximum) index 7 (High) in August in Bar Harbor7
    7 (High) UV index
  • 13°C sea temperature in August in Bar Harbor13
    13°C 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 / mm)  |  Imperial (°F / inches)

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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.

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 13°C.

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.

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.

JanFebMarAprMayJunJulAugSepOctNovDec

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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