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Matinicus Harbor, ME - Wheaton Island Marine Weather Forecast

Station MISM1 - Matinicus Rock, ME

August 18, 2026 1:00 am EDT
Location: 43.784N 68.855W
Wind Direction: SE (130°)
Wind Speed: 5.1 knots
Wind Gust: 5.1 knots
Atmospheric Pressure: 29.87 in (1011.6 mb)
Pressure Tendency: +0.00 in (+0.0 mb)
Air Temperature: 62.4°F (16.9°C)
Dew Point: 62.4°F (16.9°C)


Overnight - 59°F
Aug 18, 2026
5 to 10 mph E
Areas Of Fog
Areas of fog and scattered rain showers before 3am, then a chance of rain showers and areas of fog between 3am and 4am, then areas of fog and scattered rain showers. Cloudy, with a low around 59. East wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
Tuesday - 66°F
Aug 18, 2026
10 mph NE
Areas Of Fog then Mostly Cloudy
Areas of fog and scattered rain showers before 10am. Mostly cloudy, with a high near 66. Northeast wind around 10 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Tuesday Night - 59°F
Aug 18, 2026
5 mph N
Areas Of Fog
Areas of fog after 10pm. Mostly cloudy, with a low around 59. North wind around 5 mph.
Wednesday - 69°F
Aug 19, 2026
5 to 10 mph W
Areas Of Fog then Partly Sunny
Areas of fog before 8am. Partly sunny, with a high near 69. West wind 5 to 10 mph.
Wednesday Night - 61°F
Aug 19, 2026
10 mph SW
Mostly Cloudy
Mostly cloudy, with a low around 61. Southwest wind around 10 mph.
Thursday - 69°F
Aug 20, 2026
5 to 10 mph W
Mostly Sunny
Mostly sunny, with a high near 69.
Thursday Night - 60°F
Aug 20, 2026
5 to 10 mph W
Mostly Cloudy
Mostly cloudy, with a low around 60.
Friday - 68°F
Aug 21, 2026
5 mph E
Mostly Sunny
Mostly sunny, with a high near 68.
Friday Night - 60°F
Aug 21, 2026
5 to 10 mph E
Partly Cloudy
Partly cloudy, with a low around 60.
Saturday - 67°F
Aug 22, 2026
5 to 10 mph E
Slight Chance Rain Showers
A slight chance of rain showers after 8am. Partly sunny, with a high near 67.
Saturday Night - 60°F
Aug 22, 2026
10 mph SE
Chance Rain Showers
A chance of rain showers. Mostly cloudy, with a low around 60. Chance of precipitation is 30%.
Sunday - 68°F
Aug 23, 2026
10 mph E
Chance Rain Showers
A chance of rain showers. Mostly cloudy, with a high near 68. Chance of precipitation is 40%.
Sunday Night - 61°F
Aug 23, 2026
10 mph S
Chance Rain Showers
A chance of rain showers. Mostly cloudy, with a low around 61. Chance of precipitation is 50%.
Monday - 69°F
Aug 24, 2026
10 to 15 mph SW
Chance Rain Showers
A chance of rain showers before 4pm. Partly sunny, with a high near 69.

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