Marine Weather Net

Castine, ME Weather Forecast


Marine Forecast: Penobscot Bay


Castine, Maine

 Lat: 44.39N, Lon: 68.8W

Current Conditions Updated: 856 AM EDT WED MAY 13 2026

Clear


Temp: 51°F
  • Humidity:
  • 40%
  • Winds:
  • 6 MPH ENE
  • Gusts:
  • N/A MPH
  • Barometer:
  • 30.11 in.
  • Dewpoint:
  • 28°F
  • Heat index:
  • 51°F

  • Sunrise:
  • 5:08 AM EDT
  • Sunset:
  • 7:52 PM EDT
  • Moonrise:
  • 3:08 AM EDT
  • Moonset:
  • 4:16 PM EDT

TODAY

PARTLY SUNNY
Hi: 59°F
Lo: 45°F
Precip: 50%

THURSDAY

CHANCE OF SHOWERS
Hi: 60°F
Lo: 45°F
Precip: 50%

FRIDAY

SHOWERS
Hi: 59°F
Lo: 45°F
Precip: 70%

SATURDAY

MOSTLY SUNNY
Hi: 69°F
Lo: 50°F
Weather Forecast In Detail:
Forecast Issued: 817 AM EDT Wed May 13 2026

Today...Partly sunny this morning, then mostly cloudy with a chance of rain this afternoon. Highs in the upper 50s. West winds around 5 mph, becoming south with gusts up to 20 mph this afternoon. Chance of rain 50 percent.
Tonight...Cloudy. A chance of rain in the evening. Patchy fog. Lows in the mid 40s. Southeast winds 5 to 10 mph. Chance of rain 40 percent.
Thursday...Mostly cloudy. Patchy fog in the morning. A chance of showers in the afternoon. Highs around 60. Southeast winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 50 percent.
Thursday Night...A chance of showers in the evening, then showers likely after midnight. Lows in the mid 40s. East winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 70 percent.
Friday...Showers likely. Highs in the upper 50s. Northeast winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 70 percent.
Friday Night...Mostly cloudy with a chance of showers in the evening, then partly cloudy after midnight. Lows in the mid 40s. Chance of rain 40 percent.
Saturday...Mostly sunny. Highs in the upper 60s.
Saturday Night...Mostly clear. Lows around 50.
Sunday...Sunny. Highs in the lower 70s.
Sunday Night...Mostly clear. Lows in the upper 40s.
Monday...Mostly sunny in the morning, then becoming partly sunny. Highs in the upper 60s.
Monday Night...Partly cloudy. Lows in the upper 40s.
Tuesday...Partly sunny. Highs in the upper 60s.
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