Bar Harbor weather in August 2025

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)

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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.

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