Marine Weather Net

Portland, ME Weather Forecast


Marine Forecast: Casco Bay


Portland, Maine

 Lat: 43.66N, Lon: 70.26W

Current Conditions Updated: 1251 PM EDT SAT MAY 23 2026

Mostly Cloudy
Temp: 61°F
  • Humidity:
  • 34%
  • Winds:
  • 10 MPH SE
  • Gusts:
  • N/A MPH
  • Barometer:
  • 30.54 in.
  • Dewpoint:
  • 33°F
  • Heat index:
  • 61°F

  • Sunrise:
  • 5:07 AM EDT
  • Sunset:
  • 8:06 PM EDT
  • Moonrise:
  • 12:28 PM EDT
  • Moonset:
  • 1:31 AM EDT

TODAY

PARTLY SUNNY
Hi: 65°F
Lo: 45°F

SUNDAY

RAIN
Hi: 55°F
Lo: 45°F
Precip: 90%

MEMORIAL DAY

SHOWERS
Hi: 69°F
Lo: 49°F
Precip: 70%

TUESDAY

PARTLY SUNNY
Hi: 79°F
Lo: 55°F
Weather Forecast In Detail:
Forecast Issued: 801 AM EDT Sat May 23 2026

BEACH HAZARDS STATEMENT IN EFFECT UNTIL 8 PM EDT THIS EVENING
Today...Partly sunny this morning, then becoming mostly cloudy. Highs in the mid 60s. Light and variable winds, becoming southeast around 10 mph this afternoon.
Tonight...Cloudy. Lows in the mid 40s. Light and variable winds.
Sunday...Cloudy. Rain in the afternoon. Highs in the mid 50s. Southeast winds around 10 mph. Chance of rain 90 percent.
Sunday Night...Rain. Lows in the mid 40s. East winds around 10 mph in the evening, becoming light and variable. Chance of rain near 100 percent.
Memorial Day...Cloudy. Showers likely in the morning. Highs in the upper 60s. Light and variable winds. Chance of rain 70 percent.
Monday Night...Partly cloudy. Lows in the upper 40s.
Tuesday...Partly sunny. Highs in the upper 70s.
Tuesday Night...Partly cloudy. Lows in the mid 50s.
Wednesday...Partly sunny. A chance of showers in the afternoon. Highs in the upper 70s. Chance of rain 40 percent.
Wednesday Night...Partly cloudy. A chance of showers in the evening. Lows around 50. Chance of rain 40 percent.
Thursday...Partly sunny with a 30 percent chance of showers. Highs in the upper 60s.
Thursday Night...Partly cloudy. A chance of showers in the evening. Lows in the upper 40s. Chance of rain 30 percent.
Friday...Partly sunny with a 30 percent chance of showers. Highs in the mid 60s.
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