Marine Weather Net

Portland, ME Weather Forecast


Marine Forecast: Casco Bay


Portland, Maine

 Lat: 43.66N, Lon: 70.26W

Current Conditions Updated: 451 AM EST SAT DEC 13 2025

Clear


Temp: 14°F
  • Humidity:
  • 87%
  • Winds:
  • N/A
  • Gusts:
  • N/A MPH
  • Barometer:
  • 30.03 in.
  • Dewpoint:
  • 11°F
  • Heat index:
  • 14°F

  • Sunrise:
  • 7:04 AM EST
  • Sunset:
  • 4:03 PM EST
  • Moonrise:
  • 12:53 AM EST
  • Moonset:
  • 12:24 PM EST

TODAY

SNOW SHOWERS
Hi: 35°F
Lo: 20°F
Precip: 20%

SUNDAY

SNOW SHOWERS
Hi: 30°F
Lo: 12°F
Precip: 40%

MONDAY

MOSTLY SUNNY
Hi: 25°F
Lo: 13°F

TUESDAY

PARTLY SUNNY
Hi: 31°F
Lo: 18°F
Weather Forecast In Detail:
Forecast Issued: 1244 AM EST Sat Dec 13 2025

Today...Partly sunny this morning, then mostly cloudy with a slight chance of snow showers this afternoon. Highs in the mid 30s. Light and variable winds, becoming southwest around 10 mph with gusts up to 20 mph this afternoon. Chance of snow 20 percent.
Tonight...Cloudy with a 20 percent chance of snow showers. Lows around 20. Light and variable winds. Gusts up to 20 mph in the evening.
Sunday...Mostly cloudy with a 40 percent chance of snow showers. Highs around 30. North winds around 10 mph. Gusts up to 25 mph in the afternoon.
Sunday Night...Partly cloudy in the evening, then clearing. Lows around 12. Northwest winds around 10 mph with gusts up to 25 mph. Wind chill values as low as 1 below.
Monday...Mostly sunny. Highs in the mid 20s. Northwest winds 10 to 15 mph with gusts up to 25 mph. Wind chill values as low as 3 below in the morning.
Monday Night...Mostly cloudy. Lows 10 to 15.
Tuesday...Partly sunny. Highs in the lower 30s.
Tuesday Night...Partly cloudy in the evening, then becoming mostly cloudy. Lows 15 to 20.
Wednesday...Mostly cloudy in the morning, then becoming partly sunny. Highs in the upper 30s.
Wednesday Night...Partly cloudy. Lows around 20.
Thursday...Partly sunny in the morning, then becoming mostly cloudy. Highs in the lower 40s.
Thursday Night...Rain likely. Lows in the upper 20s. Temperatures rising into the upper 30s after midnight. Chance of rain 60 percent.
Friday...Partly sunny. A chance of rain in the morning. Highs in the lower 40s. Temperatures falling into the lower 30s in the afternoon. Chance of rain 50 percent.
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