South Portland, ME Weather Forecast & Alerts

Current conditions, 5-day forecast, and active NWS weather alerts for South Portland, ME.

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Current Conditions — South Portland, ME

PORTLAND (KPWM)

Cloudy

46.4 F
Humidity:66%
Wind Speed: 12.7 mph
Barometer:29.66 in
Dewpoint:35.6 F
Visibility:10.00 mi
Precip:--
Heat Index:NA
Wind Chill:40.6 F
May 3 2026, 12:45 PM EDT
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5-Day Forecast — South Portland, ME

Sunday

High 53 °F
Mostly Cloudy
Sunday
Night
Low 41 °F
Partly Cloudy
Monday

High 62 °F
Partly Sunny
Monday
Night
Low 50 °F
Partly Cloudy
Tuesday

High 66 °F
Partly Sunny
Tuesday
Night
Low 53 °F
Chance of Rain
Wednesday

High 59 °F
Rain Showers Likely
Wednesday
Night
Low 48 °F
Rain
Thursday

High 53 °F
Rain Showers Likely

Detailed Forecast — South Portland, ME

Sunday
Mostly Cloudy. High near 53°F. Wind 18 to 22 mph, with gusts as high as 33 mph.
Sunday Night
Partly Cloudy. Low around 41°F. Wind 8 to 18 mph, with gusts as high as 25 mph.
Monday
Partly Sunny. High near 62°F. Wind 10 to 14 mph, with gusts as high as 25 mph.
Monday Night
Partly Cloudy. Low around 50°F. Wind 9 to 10 mph, with gusts as high as 20 mph.
Tuesday
Partly Sunny. High near 66°F. Wind 12 to 18 mph, with gusts as high as 28 mph.
Tuesday Night
Chance of Rain. Low around 53°F. Wind 14 to 16 mph, with gusts as high as 25 mph.
Wednesday
Rain Showers Likely. High near 59°F. Wind 14 to 16 mph, with gusts as high as 25 mph.
Wednesday Night
Rain. Low around 48°F. Wind 3 to 10 mph, with gusts as high as 20 mph.
Thursday
Rain Showers Likely. High near 53°F. Wind 2 to 7 mph, with gusts as high as 14 mph.
Thursday Night
Rain Likely. Low around 44°F. Wind around 3 mph, with gusts as high as 7 mph.
Friday
Slight Chance of Rain Showers. High near 55°F. Wind 6 to 12 mph, with gusts as high as 22 mph.
Friday Night
Partly Cloudy. Low around 42°F. Wind 3 to 5 mph, with gusts as high as 9 mph.
Saturday
Slight Chance of Rain Showers. High near 55°F. Wind 3 to 9 mph, with gusts as high as 17 mph.
ME Radar
Current Radar • ME
Day 1 Outlook • May 3, 2026

Observation History — South Portland, ME

Time Wind
(mph)		 Vis
(mi)		 Weather Precip (in) Temperature (F) Relative
Humidity		 Wind
Chill
(F)		 Heat
Index
(F)		 Pressure
Air Dwpt altimeter
(in)		 sea level
(mb)
12:45 PM EDT 12.7 10.00 Cloudy -- 46.4 35.6 66% 40.6 NA 29.66 1004.4
12:40 PM EDT 17.3 G 29.9 10.00 Cloudy -- 46.4 35.6 66% 39.6 NA 29.66 1004.4
12:35 PM EDT 18.4 G 27.6 10.00 Cloudy -- 46.4 35.6 66% 39.2 NA 29.66 1004.4
12:30 PM EDT G 24.2 10.00 Cloudy -- 46.4 35.6 66% NA NA 29.66 1004.4
12:25 PM EDT 17.3 10.00 Cloudy -- 46.4 35.6 66% 39.6 NA 29.66 1004.4
12:10 PM EDT 10.00 Cloudy -- 46.4 35.6 66% NA NA 29.67 1004.7
12:05 PM EDT G 27.6 10.00 Cloudy -- 46.4 37.4 71% NA NA 29.67 1004.7
12:00 PM EDT 18.4 G 24.2 10.00 Cloudy -- 46.4 37.4 71% 39.2 NA 29.67 1004.7
11:50 AM EDT 18.4 G 24.2 10.00 Cloudy -- 46.4 37.4 71% 39.2 NA 29.67 1004.7
11:35 AM EDT 15.0 G 21.9 10.00 Cloudy -- 46.4 37.4 71% 40.1 NA 29.67 1004.7
11:30 AM EDT 19.6 G 27.6 10.00 Cloudy and Windy -- 46.4 37.4 71% 39.0 NA 29.67 1004.7
11:20 AM EDT 18.4 10.00 Cloudy -- 46.4 37.4 71% 39.2 NA 29.67 1004.7
11:10 AM EDT 15.0 G 20.7 10.00 Cloudy -- 46.4 37.4 71% 40.1 NA 29.68 1005.1
11:05 AM EDT 15.0 10.00 Cloudy -- 46.4 39.2 76% 40.1 NA 29.67 1004.7
10:50 AM EDT 12.7 10.00 Cloudy -- 44.6 39.2 81% 38.5 NA 29.68 1005.1
10:45 AM EDT 16.1 G 24.2 10.00 Cloudy -- 44.6 39.2 81% 37.4 NA 29.68 1005.1
10:35 AM EDT 10.4 G 17.3 10.00 Cloudy -- 44.6 39.2 81% 39.2 NA 29.68 1005.1
10:30 AM EDT 12.7 G 19.6 10.00 Cloudy -- 44.6 39.2 81% 38.5 NA 29.68 1005.1
10:25 AM EDT 13.8 10.00 Cloudy -- 44.6 39.2 81% 38.1 NA 29.68 1005.1
10:20 AM EDT 12.7 10.00 Cloudy -- 44.6 39.2 81% 38.5 NA 29.69 1005.4
10:10 AM EDT 12.7 10.00 Cloudy -- 44.6 39.2 81% 38.5 NA 29.69 1005.4
10:05 AM EDT NW 11.5 10.00 Cloudy -- 44.6 39.2 81% 38.8 NA 29.69 1005.4
10:00 AM EDT 12.7 10.00 Cloudy -- 44.6 39.2 81% 38.5 NA 29.70 1005.8
09:50 AM EDT 9.2 10.00 Cloudy -- 44.6 39.2 81% 39.7 NA 29.70 1005.8

Regional Weather Observation

PORTLAND (KPWM)

Cloudy
46.4 F

FRYEBURG (KIZG)

Cloudy
48.2 F

AUBURN/LEWISTON (KLEW)

Cloudy
46.4 F

SANFORD MUNI (KSFM)

Cloudy
46.4 F

ROCHESTER (KDAW)

Cloudy
48.2 F

WISCASSET (KIWI)

Light Rain
44.6 F
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