Marine Weather Net

Harpswell, ME Weather Forecast


Marine Forecast: Casco Bay


Harpswell, Maine

 Lat: 43.85N, Lon: 70.36W

Current Conditions Updated: 156 PM EDT SAT SEP 5 2026

Mostly Cloudy
Temp: 70°F
  • Humidity:
  • 59%
  • Winds:
  • 12 MPH NNE
  • Gusts:
  • N/A MPH
  • Barometer:
  • 29.86 in.
  • Dewpoint:
  • 55°F
  • Heat index:
  • 76°F

  • Sunrise:
  • 6:06 AM EDT
  • Sunset:
  • 7:10 PM EDT
  • Moonrise:
  • N/A EDT
  • Moonset:
  • 3:57 PM EDT

TODAY

PARTLY SUNNY
Hi: 71°F
Lo: 49°F
Precip: 20%

SUNDAY

MOSTLY SUNNY
Hi: 75°F
Lo: 49°F

LABOR DAY

SUNNY

Hi: 79°F
Lo: 51°F

TUESDAY

MOSTLY SUNNY
Hi: 79°F
Lo: 51°F
Weather Forecast In Detail:
Forecast Issued: 1051 AM EDT Sat Sep 05 2026

Today...Partly sunny with isolated showers. Highs in the lower 70s. North winds around 10 mph with gusts up to 20 mph. Chance of rain 20 percent.
Tonight...Partly cloudy. Isolated showers in the evening. Lows in the upper 40s. North winds around 10 mph with gusts up to 20 mph in the evening, becoming light and variable. Chance of rain 20 percent.
Sunday...Mostly sunny. Highs in the mid 70s. North winds around 10 mph with gusts up to 20 mph.
Sunday Night...Mostly clear. Lows in the upper 40s. Northwest winds around 10 mph in the evening, becoming light and variable.
Labor Day...Sunny. Highs in the upper 70s. Northwest winds around 10 mph with gusts up to 20 mph.
Monday Night...Mostly clear. Lows in the lower 50s.
Tuesday...Mostly sunny. Highs in the upper 70s.
Tuesday Night...Partly cloudy. Lows in the lower 50s.
Wednesday...Partly sunny in the morning, then mostly cloudy with a chance of showers in the afternoon. Highs in the lower 70s. Chance of rain 40 percent.
Wednesday Night...Showers likely, mainly in the evening. Lows around 60. Chance of rain 60 percent.
Thursday...Partly sunny. Highs in the upper 70s.
Thursday Night...Partly cloudy. Lows around 50.
Friday...Partly sunny. Highs in the lower 70s.
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