Station CASM1 - 8418150 - Portland, ME
August 18, 2026 6:30 am EDTLocation: 43.656N 70.246W
Wind Direction: NNE (20°)
Wind Speed: 1.0 knots
Wind Gust: 1.9 knots
Atmospheric Pressure: 29.81 in (1009.6 mb)
Air Temperature: 65.3°F (18.5°C)
Water Temperature: 59.7°F (15.4°C)
Today - 69°F
Aug 18, 2026
0 to 5 mph E
Areas Of Fog then Partly Sunny
Areas of fog before 11am. Partly sunny, with a high near 69. East wind 0 to 5 mph.
Tonight - 63°F
Aug 18, 2026
0 to 5 mph SW
Patchy Fog
Patchy fog between 11pm and 4am. Mostly cloudy, with a low around 63. Southwest wind 0 to 5 mph.
Wednesday - 72°F
Aug 19, 2026
0 to 10 mph SW
Partly Sunny
Partly sunny, with a high near 72. Southwest wind 0 to 10 mph.
Wednesday Night - 64°F
Aug 19, 2026
5 to 10 mph SW
Mostly Cloudy
Mostly cloudy, with a low around 64. Southwest wind 5 to 10 mph.
Thursday - 72°F
Aug 20, 2026
0 to 10 mph N
Mostly Sunny
Mostly sunny, with a high near 72. North wind 0 to 10 mph.
Thursday Night - 62°F
Aug 20, 2026
0 to 5 mph W
Partly Cloudy
Partly cloudy, with a low around 62.
Friday - 72°F
Aug 21, 2026
5 to 10 mph NE
Mostly Sunny
Mostly sunny, with a high near 72.
Friday Night - 62°F
Aug 21, 2026
5 to 10 mph NW
Partly Cloudy
Partly cloudy, with a low around 62.
Saturday - 69°F
Aug 22, 2026
5 to 10 mph E
Mostly Sunny then Chance Rain Showers
A chance of rain showers after 1pm. Mostly sunny, with a high near 69. Chance of precipitation is 30%.
Saturday Night - 62°F
Aug 22, 2026
5 to 10 mph E
Chance Rain Showers
A chance of rain showers. Mostly cloudy, with a low around 62. Chance of precipitation is 50%.
Sunday - 70°F
Aug 23, 2026
10 mph NE
Rain Showers Likely
Rain showers likely. Mostly cloudy, with a high near 70. Chance of precipitation is 60%.
Sunday Night - 62°F
Aug 23, 2026
10 mph SE
Chance Showers And Thunderstorms
A chance of rain showers before 8pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 62. Chance of precipitation is 50%.
Monday - 71°F
Aug 24, 2026
10 mph SW
Slight Chance Rain Showers
A slight chance of rain showers. Partly sunny, with a high near 71.
Monday Night - 62°F
Aug 24, 2026
10 mph W
Slight Chance Rain Showers then Partly Cloudy
A slight chance of rain showers before 8pm. Partly cloudy, with a low around 62.