Marine Weather Net

Portland, ME Weather Forecast


Marine Forecast: Casco Bay


Portland, Maine

 Lat: 43.66N, Lon: 70.26W

Current Conditions Updated: 1152 PM EST SUN NOV 16 2025

Overcast
Temp: 35°F
  • Humidity:
  • 69%
  • Winds:
  • 12 MPH W
  • Gusts:
  • 21 MPH
  • Barometer:
  • 29.21 in.
  • Dewpoint:
  • 26°F
  • Heat index:
  • 35°F

  • Sunrise:
  • 6:35 AM EST
  • Sunset:
  • 4:13 PM EST
  • Moonrise:
  • 4:05 AM EST
  • Moonset:
  • 2:38 PM EST

TONIGHT

SNOW SHOWERS
Lo: 30°F
Precip: 20%

MONDAY

SNOW SHOWERS
Hi: 41°F
Lo: 29°F
Precip: 20%

TUESDAY

MOSTLY SUNNY
Hi: 41°F
Lo: 25°F

WEDNESDAY

MOSTLY SUNNY
Hi: 45°F
Lo: 25°F
Weather Forecast In Detail:
Forecast Issued: 1120 PM EST Sun Nov 16 2025

Overnight...Isolated rain showers late this evening. Mostly cloudy with isolated snow showers. Lows around 30. West winds 10 to 15 mph with gusts up to 30 mph. Chance of precipitation 20 percent.
Monday...Mostly cloudy with isolated rain or snow showers in the morning, then partly sunny in the afternoon. Highs in the lower 40s. West winds 15 to 20 mph with gusts up to 30 mph. Chance of precipitation 20 percent.
Monday Night...Mostly clear. Lows in the upper 20s. West winds 10 to 15 mph with gusts up to 30 mph.
Tuesday...Mostly sunny. Highs in the lower 40s. West winds 10 to 15 mph with gusts up to 25 mph.
Tuesday Night...Mostly clear. Lows in the mid 20s. West winds around 10 mph with gusts up to 20 mph in the evening, becoming light and variable.
Wednesday...Mostly sunny. Highs in the mid 40s.
Wednesday Night...Mostly clear in the evening, then becoming partly cloudy. Lows in the mid 20s.
Thursday...Mostly cloudy in the morning, then becoming partly sunny. Highs in the mid 40s.
Thursday Night...Partly cloudy in the evening, then becoming mostly cloudy. Lows in the upper 20s.
Friday...A chance of rain in the morning, then rain likely in the afternoon. Highs in the upper 40s. Chance of rain 70 percent.
Friday Night...Rain likely, mainly in the evening. Lows in the mid 30s. Chance of rain 60 percent.
Saturday...Partly sunny. A chance of rain in the morning. Highs in the upper 40s. Chance of rain 40 percent.
Saturday Night...Partly cloudy. Lows in the upper 20s.
Sunday...Partly sunny. Highs in the mid 40s.
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