Station CASM1 - 8418150 - Portland, ME
August 18, 2026 12:30 am EDTLocation: 43.656N 70.246W
Wind Direction: NNE (30°)
Wind Speed: 1.9 knots
Wind Gust: 2.9 knots
Atmospheric Pressure: 29.83 in (1010.2 mb)
Air Temperature: 63.7°F (17.6°C)
Water Temperature: 61.3°F (16.3°C)
Overnight - 61°F
Aug 18, 2026
0 to 5 mph E
Areas Of Fog
Areas of fog. Mostly cloudy, with a low around 61. East wind 0 to 5 mph. New rainfall amounts less than a tenth of an inch possible.
Tuesday - 70°F
Aug 18, 2026
5 mph NE
Areas Of Fog then Slight Chance Rain Showers
Areas of fog before 10am, then a slight chance of rain showers between 1pm and 2pm. Mostly cloudy, with a high near 70. Northeast wind around 5 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Tuesday Night - 63°F
Aug 18, 2026
0 to 5 mph NW
Mostly Cloudy then Areas Of Fog
Areas of fog after midnight. Mostly cloudy, with a low around 63. Northwest wind 0 to 5 mph.
Wednesday - 71°F
Aug 19, 2026
0 to 15 mph SW
Areas Of Fog then Mostly Sunny
Areas of fog before 8am. Mostly sunny, with a high near 71. Southwest wind 0 to 15 mph.
Wednesday Night - 64°F
Aug 19, 2026
5 to 15 mph SW
Partly Cloudy
Partly cloudy, with a low around 64. Southwest wind 5 to 15 mph.
Thursday - 72°F
Aug 20, 2026
0 to 10 mph N
Mostly Sunny
Mostly sunny, with a high near 72.
Thursday Night - 62°F
Aug 20, 2026
5 to 10 mph W
Partly Cloudy
Partly cloudy, with a low around 62.
Friday - 71°F
Aug 21, 2026
5 to 10 mph E
Mostly Sunny
Mostly sunny, with a high near 71.
Friday Night - 62°F
Aug 21, 2026
5 to 10 mph E
Partly Cloudy
Partly cloudy, with a low around 62.
Saturday - 69°F
Aug 22, 2026
5 to 10 mph E
Slight Chance Rain Showers
A slight chance of rain showers. Partly sunny, with a high near 69.
Saturday Night - 63°F
Aug 22, 2026
5 to 10 mph SE
Chance Rain Showers
A chance of rain showers. Mostly cloudy, with a low around 63. Chance of precipitation is 30%.
Sunday - 70°F
Aug 23, 2026
5 to 15 mph E
Chance Rain Showers
A chance of rain showers. Mostly cloudy, with a high near 70. Chance of precipitation is 50%.
Sunday Night - 63°F
Aug 23, 2026
5 to 15 mph S
Chance Rain Showers
A chance of rain showers. Mostly cloudy, with a low around 63. Chance of precipitation is 50%.
Monday - 72°F
Aug 24, 2026
5 to 15 mph SW
Chance Rain Showers
A chance of rain showers. Partly sunny, with a high near 72.