Station CASM1 - 8418150 - Portland, ME
May 17, 2026 12:48 am EDTLocation: 43.656N 70.246W
Wind Direction: SSW (200°)
Wind Speed: 12.1 knots
Wind Gust: 14.0 knots
Atmospheric Pressure: 29.75 in (1007.5 mb)
Overnight - 53°F
May 17, 2026
15 to 20 mph SW
Rain Showers Likely
Rain showers likely before 4am. Partly cloudy, with a low around 53. Southwest wind 15 to 20 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
Sunday - 67°F
May 17, 2026
10 to 15 mph W
Sunny
Sunny, with a high near 67. West wind 10 to 15 mph. New rainfall amounts less than a tenth of an inch possible.
Sunday Night - 49°F
May 17, 2026
5 to 15 mph N
Partly Cloudy
Partly cloudy, with a low around 49. North wind 5 to 15 mph.
Monday - 56°F
May 18, 2026
5 to 15 mph E
Mostly Sunny
Mostly sunny, with a high near 56. East wind 5 to 15 mph.
Monday Night - 50°F
May 18, 2026
10 to 15 mph S
Partly Cloudy
Partly cloudy, with a low around 50. South wind 10 to 15 mph.
Tuesday - 70°F
May 19, 2026
15 mph SW
Mostly Sunny then Slight Chance Rain Showers
A slight chance of rain showers after 4pm. Mostly sunny, with a high near 70.
Tuesday Night - 60°F
May 19, 2026
15 mph SW
Slight Chance Rain Showers then Partly Cloudy
A slight chance of rain showers before 8pm. Partly cloudy, with a low around 60.
Wednesday - 70°F
May 20, 2026
15 mph SW
Mostly Sunny then Chance Showers And Thunderstorms
A slight chance of rain showers between noon and 2pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 70. Chance of precipitation is 50%.
Wednesday Night - 51°F
May 20, 2026
10 to 15 mph W
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Mostly cloudy, with a low around 51. Chance of precipitation is 50%.
Thursday - 57°F
May 21, 2026
10 to 15 mph NW
Partly Sunny
Partly sunny, with a high near 57.
Thursday Night - 46°F
May 21, 2026
5 to 10 mph NW
Partly Cloudy
Partly cloudy, with a low around 46.
Friday - 54°F
May 22, 2026
5 to 15 mph E
Mostly Sunny
Mostly sunny, with a high near 54.
Friday Night - 46°F
May 22, 2026
5 to 10 mph W
Mostly Cloudy
Mostly cloudy, with a low around 46.
Saturday - 54°F
May 23, 2026
5 to 10 mph E
Mostly Sunny
Mostly sunny, with a high near 54.