Marine Weather Net

Harpswell, ME Weather Forecast


Marine Forecast: Casco Bay


Harpswell, Maine

 Lat: 43.85N, Lon: 70.36W

Current Conditions Updated: 856 AM EDT THU AUG 27 2026

Mostly Clear
Temp: 67°F
  • Humidity:
  • 93%
  • Winds:
  • N/A
  • Gusts:
  • N/A MPH
  • Barometer:
  • 30.07 in.
  • Dewpoint:
  • 65°F
  • Heat index:
  • 67°F

  • Sunrise:
  • 5:57 AM EDT
  • Sunset:
  • 7:24 PM EDT
  • Moonrise:
  • 7:15 PM EDT
  • Moonset:
  • 5:13 AM EDT

TODAY

PARTLY SUNNY
Hi: 80°F
Lo: 65°F
Precip: 50%

FRIDAY

CHANCE OF SHOWERS
Hi: 81°F
Lo: 55°F
Precip: 40%

SATURDAY

MOSTLY SUNNY
Hi: 80°F
Lo: 55°F

SUNDAY

PARTLY SUNNY
Hi: 81°F
Lo: 60°F
Weather Forecast In Detail:
Forecast Issued: 801 AM EDT Thu Aug 27 2026

Today...Partly sunny. A chance of showers and thunderstorms this afternoon. Highs around 80. South winds 10 to 15 mph. Chance of rain 50 percent.
Tonight...Partly cloudy with a chance of showers and thunderstorms in the evening, then mostly cloudy with a slight chance of showers after midnight. Humid with lows in the lower 60s. South winds around 10 mph. Gusts up to 25 mph in the evening. Chance of rain 50 percent.
Friday...Mostly cloudy. A slight chance of showers and thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. Humid with highs in the lower 80s. Light and variable winds, becoming south around 10 mph in the afternoon. Chance of rain 40 percent.
Friday Night...Partly cloudy. Lows in the mid 50s. Light and variable winds.
Saturday...Mostly sunny. Highs around 80. Light and variable winds, becoming west around 10 mph in the afternoon.
Saturday Night...Mostly clear in the evening, then becoming partly cloudy. Lows in the mid 50s.
Sunday...Partly sunny. Highs in the lower 80s.
Sunday Night...Partly cloudy. Lows around 60.
Monday...Partly sunny. Highs in the upper 70s.
Monday Night...Partly cloudy. Lows in the mid 50s.
Tuesday...Partly sunny. Highs in the lower 70s.
Tuesday Night...Partly cloudy in the evening, then becoming mostly cloudy. A chance of showers. Lows in the mid 50s. Chance of rain 50 percent.
Wednesday...Mostly cloudy with a 50 percent chance of showers. Highs in the lower 70s.
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