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Ellsworth, ME - Union River Marine Weather Forecast

Station ATGM1 - 8413320 - Bar Harbor, ME

August 18, 2026 12:30 am EDT
Location: 44.392N 68.204W
Wind Direction: SSE (160°)
Wind Speed: 1.0 knots
Wind Gust: 5.1 knots
Atmospheric Pressure: 29.86 in (1011.2 mb)
Air Temperature: 61.3°F (16.3°C)
Water Temperature: 54.9°F (12.7°C)


Overnight - 58°F
Aug 18, 2026
3 mph E
Areas Of Fog
Areas of fog and isolated rain showers. Cloudy, with a low around 58. East wind around 3 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Tuesday - 69°F
Aug 18, 2026
3 to 7 mph E
Areas Of Fog
Areas of fog and scattered rain showers. Mostly cloudy, with a high near 69. East wind 3 to 7 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Tuesday Night - 61°F
Aug 18, 2026
1 to 5 mph N
Areas Of Fog
Areas of fog and a slight chance of rain showers. Mostly cloudy, with a low around 61. North wind 1 to 5 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Wednesday - 72°F
Aug 19, 2026
1 to 8 mph W
Areas Of Fog then Partly Sunny
Areas of fog before 9am. Partly sunny, with a high near 72. West wind 1 to 8 mph.
Wednesday Night - 61°F
Aug 19, 2026
1 to 7 mph SW
Patchy Fog
Patchy fog between 9pm and 5am. Mostly cloudy, with a low around 61. Southwest wind 1 to 7 mph.
Thursday - 74°F
Aug 20, 2026
1 to 7 mph W
Mostly Sunny
Mostly sunny, with a high near 74. West wind 1 to 7 mph.
Thursday Night - 59°F
Aug 20, 2026
1 to 6 mph W
Partly Cloudy
Partly cloudy, with a low around 59. West wind 1 to 6 mph.
Friday - 73°F
Aug 21, 2026
2 to 6 mph E
Mostly Sunny
Mostly sunny, with a high near 73.
Friday Night - 58°F
Aug 21, 2026
0 to 5 mph NW
Partly Cloudy
Partly cloudy, with a low around 58.
Saturday - 71°F
Aug 22, 2026
2 to 7 mph E
Partly Sunny then Slight Chance Rain Showers
A slight chance of rain showers after noon. Partly sunny, with a high near 71. Chance of precipitation is 20%.
Saturday Night - 59°F
Aug 22, 2026
5 mph E
Chance Rain Showers
A chance of rain showers. Mostly cloudy, with a low around 59. Chance of precipitation is 30%.
Sunday - 70°F
Aug 23, 2026
5 to 8 mph E
Chance Rain Showers
A chance of rain showers. Mostly cloudy, with a high near 70. Chance of precipitation is 40%.
Sunday Night - 60°F
Aug 23, 2026
3 to 7 mph SE
Chance Rain Showers
A chance of rain showers. Mostly cloudy, with a low around 60. Chance of precipitation is 50%.
Monday - 72°F
Aug 24, 2026
5 to 9 mph SW
Chance Rain Showers
A chance of rain showers before 5pm. Partly sunny, with a high near 72.

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