Marine Weather Net

Yarmouth, ME Weather Forecast


Marine Forecast: Casco Bay


Yarmouth, Maine

 Lat: 43.80N, Lon: 70.19W

Current Conditions Updated: 451 PM EST WED DEC 17 2025

Overcast
Temp: 38°F
  • Humidity:
  • 59%
  • Winds:
  • 6 MPH SW
  • Gusts:
  • N/A MPH
  • Barometer:
  • 29.73 in.
  • Dewpoint:
  • 25°F
  • Heat index:
  • 38°F

  • Sunrise:
  • 7:07 AM EST
  • Sunset:
  • 4:03 PM EST
  • Moonrise:
  • 5:11 AM EST
  • Moonset:
  • 1:58 PM EST

TONIGHT

MOSTLY CLEAR
Lo: 21°F

THURSDAY

PARTLY SUNNY
Hi: 45°F
Lo: 35°F

FRIDAY

RAIN
Hi: 51°F
Lo: 21°F
Precip: 100%

SATURDAY

PARTLY SUNNY
Hi: 39°F
Lo: 25°F
Weather Forecast In Detail:
Forecast Issued: 131 PM EST Wed Dec 17 2025

Tonight...Mostly clear. Lows in the lower 20s. West winds around 10 mph with gusts up to 25 mph this evening, becoming light and variable.
Thursday...Partly sunny. Highs in the mid 40s. Light and variable winds, becoming south around 10 mph with gusts up to 25 mph in the afternoon.
Thursday Night...Partly cloudy with a slight chance of rain in the evening, then cloudy with rain likely after midnight. Lows in the mid 30s. Temperatures rising into the mid 40s after midnight. South winds 10 to 15 mph with gusts up to 30 mph. Chance of rain 70 percent.
Friday...Rain. Highs in the lower 50s. South winds 15 to 25 mph with gusts up to 45 mph. Chance of rain near 100 percent.
Friday Night...Partly cloudy. A chance of rain in the evening. Lows in the lower 20s. West winds 10 to 15 mph with gusts up to 35 mph. Chance of rain 50 percent.
Saturday...Partly sunny. Highs in the upper 30s.
Saturday Night...Cloudy. A chance of rain and snow after midnight. Lows in the mid 20s. Chance of precipitation 40 percent.
Sunday...Mostly cloudy with a chance of rain and snow in the morning, then partly sunny in the afternoon. Highs in the lower 40s. Chance of precipitation 40 percent.
Sunday Night...Partly cloudy. Lows 15 to 20.
Monday...Mostly sunny. Highs in the mid 20s.
Monday Night...Mostly clear in the evening, then becoming partly cloudy. Lows around 10 above.
Tuesday...Partly sunny in the morning, then mostly cloudy with a chance of snow and rain in the afternoon. Highs in the lower 30s. Chance of precipitation 40 percent.
Tuesday Night...Mostly cloudy in the evening, then becoming partly cloudy. A chance of rain in the evening. A chance of snow. Lows around 20. Chance of precipitation 40 percent.
Wednesday...Partly sunny. Highs in the lower 30s.
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