Station CASM1 - 8418150 - Portland, ME
December 18, 2025 6:48 am ESTLocation: 43.656N 70.246W
Wind Direction: SSW (210°)
Wind Speed: 5.1 knots
Wind Gust: 6.0 knots
Atmospheric Pressure: 30.26 in (1024.6 mb)
Water Temperature: 38.1°F (3.4°C)
Today - 46°F
Dec 18, 2025
5 to 20 mph SW
Mostly Sunny
Mostly sunny, with a high near 46. Southwest wind 5 to 20 mph, with gusts as high as 30 mph.
Tonight - 42°F
Dec 18, 2025
20 to 30 mph S
Mostly Cloudy then Patchy Fog
Patchy fog between 2am and 3am, then patchy fog and a slight chance of rain. Mostly cloudy. Low around 42, with temperatures rising to around 48 overnight. South wind 20 to 30 mph, with gusts as high as 40 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Friday - 52°F
Dec 19, 2025
30 to 35 mph S
Rain
Rain and areas of fog. Cloudy, with a high near 52. South wind 30 to 35 mph, with gusts as high as 50 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Friday Night - 28°F
Dec 19, 2025
25 to 30 mph W
Rain Likely then Partly Cloudy
Rain likely and patchy fog before 10pm. Partly cloudy, with a low around 28. West wind 25 to 30 mph, with gusts as high as 45 mph. Chance of precipitation is 60%. New snow accumulation of less than half an inch possible.
Saturday - 39°F
Dec 20, 2025
15 to 25 mph W
Mostly Sunny
Mostly sunny, with a high near 39. West wind 15 to 25 mph, with gusts as high as 35 mph.
Saturday Night - 34°F
Dec 20, 2025
15 to 25 mph SW
Slight Chance Light Snow
A slight chance of snow between 11pm and 1am, then a chance of rain and snow. Cloudy, with a low around 34. Chance of precipitation is 30%.
Sunday - 44°F
Dec 21, 2025
20 to 25 mph SW
Chance Light Rain
A chance of rain before 1pm. Partly sunny, with a high near 44. Chance of precipitation is 30%.
Sunday Night - 23°F
Dec 21, 2025
25 mph W
Partly Cloudy
Partly cloudy, with a low around 23.
Monday - 27°F
Dec 22, 2025
20 to 25 mph NW
Sunny
Sunny, with a high near 27.
Monday Night - 20°F
Dec 22, 2025
10 to 20 mph NW
Partly Cloudy
Partly cloudy, with a low around 20.
Tuesday - 35°F
Dec 23, 2025
10 to 20 mph W
Chance Light Snow
A chance of snow. Partly sunny, with a high near 35. Chance of precipitation is 40%.
Tuesday Night - 28°F
Dec 23, 2025
15 to 25 mph W
Chance Light Snow
A chance of snow before 4am. Mostly cloudy, with a low around 28. Chance of precipitation is 40%.
Wednesday - 36°F
Dec 24, 2025
15 mph NW
Mostly Sunny
Mostly sunny, with a high near 36.
Wednesday Night - 21°F
Dec 24, 2025
15 to 20 mph NW
Partly Cloudy
Partly cloudy, with a low around 21.