Marine Weather Net

Castine, ME Weather Forecast


Marine Forecast: Penobscot Bay


Castine, Maine

 Lat: 44.39N, Lon: 68.8W

Current Conditions Updated: 1256 AM EDT TUE SEP 8 2026

Clear


Temp: 63°F
  • Humidity:
  • 65%
  • Winds:
  • N/A
  • Gusts:
  • N/A MPH
  • Barometer:
  • 30.04 in.
  • Dewpoint:
  • 51°F
  • Heat index:
  • 63°F

  • Sunrise:
  • 6:03 AM EDT
  • Sunset:
  • 6:59 PM EDT
  • Moonrise:
  • 2:48 AM EDT
  • Moonset:
  • 5:51 PM EDT

TONIGHT

PARTLY CLOUDY
Lo: 59°F

TUESDAY

PARTLY SUNNY
Hi: 75°F
Lo: 49°F
Precip: 30%

WEDNESDAY

MOSTLY CLOUDY
Hi: 69°F
Lo: 59°F

THURSDAY

PARTLY SUNNY
Hi: 80°F
Lo: 59°F
Precip: 70%
Weather Forecast In Detail:
Forecast Issued: 818 PM EDT Mon Sep 07 2026

Rest Of Tonight...Clear early this evening, then becoming partly cloudy. Lows in the upper 50s. Northwest winds around 5 mph with gusts up to 15 mph.
Tuesday...Partly sunny with scattered showers in the morning, then sunny in the afternoon. Highs in the mid 70s. North winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 30 percent.
Tuesday Night...Mostly clear. Lows in the upper 40s. Northeast winds 5 to 10 mph.
Wednesday...Mostly cloudy. Highs in the upper 60s. Southeast winds around 5 mph, increasing to south 10 to 15 mph in the afternoon.
Wednesday Night...Rain, brisk with lows in the upper 50s. South winds 10 to 15 mph, increasing to southwest 15 to 25 mph after midnight. Chance of rain 90 percent.
Thursday...Mostly cloudy with rain likely in the morning, then partly sunny with a slight chance of rain in the afternoon. Highs around 80. Chance of rain 70 percent.
Thursday Night...Partly cloudy. Lows in the upper 50s.
Friday...Sunny. Highs in the lower 70s.
Friday Night...Clear. Lows in the lower 50s.
Saturday...Sunny. Highs in the lower 70s.
Saturday Night...Mostly clear in the evening, then becoming partly cloudy. Lows in the lower 50s.
Sunday...Partly sunny. Highs in the lower 70s.
Sunday Night...Partly cloudy. A chance of showers in the evening. Lows in the mid 50s. Chance of rain 30 percent.
Monday...Partly sunny. Highs in the lower 70s.
SHARE THIS PAGE: