Marine Weather Net

Castine, ME Weather Forecast


Marine Forecast: Penobscot Bay


Castine, Maine

 Lat: 44.39N, Lon: 68.8W

Current Conditions Updated: 1056 PM EDT SAT JUN 6 2026

Overcast
Temp: 52°F
  • Humidity:
  • 96%
  • Winds:
  • 7 MPH E
  • Gusts:
  • N/A MPH
  • Barometer:
  • 29.68 in.
  • Dewpoint:
  • 51°F
  • Heat index:
  • 52°F

  • Sunrise:
  • 4:50 AM EDT
  • Sunset:
  • 8:15 PM EDT
  • Moonrise:
  • 12:12 AM EDT
  • Moonset:
  • 10:26 AM EDT

TONIGHT

CHANCE OF SHOWERS
Lo: 51°F
Precip: 50%

SUNDAY

CHANCE OF SHOWERS
Hi: 75°F
Lo: 47°F
Precip: 80%

MONDAY

SUNNY

Hi: 75°F
Lo: 51°F

TUESDAY

SUNNY

Hi: 81°F
Lo: 55°F
Weather Forecast In Detail:
Forecast Issued: 400 PM EDT Sat Jun 06 2026

Tonight...Mostly cloudy. Scattered showers, mainly this evening. Lows in the lower 50s. South winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 50 percent.
Sunday...Mostly cloudy. Scattered showers in the morning, then widespread showers in the afternoon. Not as cool with highs in the mid 70s. Temperature falling into the upper 60s in the afternoon. Southwest winds 5 to 10 mph with gusts up to 20 mph, becoming west 10 to 15 mph with gusts up to 30 mph in the afternoon. Chance of rain 80 percent.
Sunday Night...Mostly cloudy with a chance of showers in the evening, then partly cloudy after midnight. Less humid with lows in the upper 40s. North winds 10 to 15 mph with gusts up to 30 mph. Chance of rain 50 percent.
Monday...Sunny. Highs in the mid 70s. North winds 10 to 15 mph with gusts up to 30 mph.
Monday Night...Mostly clear in the evening, then becoming partly cloudy. Lows in the lower 50s. Southwest winds around 5 mph.
Tuesday...Sunny. Highs in the lower 80s.
Tuesday Night...Mostly clear in the evening, then becoming partly cloudy. Lows in the mid 50s.
Wednesday...Mostly sunny. Highs in the lower 80s.
Wednesday Night...Partly cloudy in the evening, then becoming mostly cloudy. Lows in the mid 50s.
Thursday...Mostly sunny. Highs in the upper 70s.
Thursday Night...Partly cloudy in the evening, then becoming mostly cloudy. Lows in the mid 50s.
Friday...Partly sunny. Highs in the upper 70s.
Friday Night...Mostly cloudy. Lows in the upper 50s.
Saturday...Mostly sunny. Highs around 80.
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