Forecast for South Portland, ME | Forecast Periods: 14
Monday
Mar 16
2026
South Portland, ME
Updated: 2:29 PM EDT
48°F
Light Rain Likely
10 mph S
Precipitation: 70%
Rain likely and isolated thunderstorms. Cloudy, with a high near 48. South wind around 10 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
Hourly Forecast
Extended Forecast
Tonight
Mon, Mar 16
41°F
Light Rain
15 mph S
Precipitation: 98%
Rain and isolated thunderstorms. Cloudy. Low around 41, with temperatures rising to around 52 overnight. South wind 15 to 25 mph, with gusts as high as 50 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday
Tue, Mar 17
46°F
Slight Chance Light Rain then Mostly Sunny
15 mph SW
Precipitation: 17%
A slight chance of rain before 7am. Mostly sunny. High near 46, with temperatures falling to around 36 in the afternoon. Southwest wind 15 to 20 mph, with gusts as high as 40 mph. Chance of precipitation is 20%. New rainfall amounts between a tenth and quarter of an inch possible.
Tuesday Night
Tue, Mar 17
15°F
Mostly Clear
5 mph W
Precipitation: 2%
Mostly clear, with a low around 15. West wind 5 to 15 mph, with gusts as high as 30 mph.
Wednesday
Wed, Mar 18
35°F
Sunny
5 mph W
Precipitation: 2%
Sunny, with a high near 35. West wind around 5 mph.
Wednesday Night
Wed, Mar 18
22°F
Mostly Cloudy
0 mph
Precipitation: 0%
Mostly cloudy, with a low around 22.
Thursday
Thu, Mar 19
39°F
Partly Sunny
0 mph S
Precipitation: 5%
Partly sunny, with a high near 39.
Thursday Night
Thu, Mar 19
26°F
Mostly Cloudy then Slight Chance Light Snow
5 mph S
Precipitation: 22%
A slight chance of snow after 1am. Mostly cloudy, with a low around 26.
Friday
Fri, Mar 20
46°F
Slight Chance Light Snow then Slight Chance Light Rain
5 mph SW
Precipitation: 22%
A slight chance of snow before 11am, then a slight chance of rain. Partly sunny, with a high near 46.
Friday Night
Fri, Mar 20
26°F
Chance Light Rain then Chance Rain And Snow
5 mph NW
Precipitation: 36%
A chance of rain before 5am, then a chance of rain and snow. Mostly cloudy, with a low around 26. Chance of precipitation is 40%.
Saturday
Sat, Mar 21
42°F
Chance Rain And Snow
5 mph N
Precipitation: 47%
A chance of rain and snow. Partly sunny, with a high near 42. Chance of precipitation is 50%.
Saturday Night
Sat, Mar 21
22°F
Chance Rain And Snow
5 mph W
Precipitation: 40%
A chance of rain and snow. Mostly cloudy, with a low around 22. Chance of precipitation is 40%.
Sunday
Sun, Mar 22
40°F
Chance Light Snow
5 mph W
Precipitation: 30%
A chance of snow. Partly sunny, with a high near 40. Chance of precipitation is 30%.
Sunday Night
Sun, Mar 22
22°F
Slight Chance Light Snow
5 mph W
Precipitation: 24%
A slight chance of snow. Mostly cloudy, with a low around 22.