Current Conditions

South Portland, Maine

70°F21°C
Partly Cloudy

Wind

SW 7 mph11 km/h

Humidity

78%

Cloud Cover

60%

As of Wednesday, August 12, 2026 at 8:44 PM EDT

Today's Outlook

Night

Mostly cloudy, with a low around 68°F20°C. Light wind from the WSW around 6 mph10 km/h.

7-Day Forecast

DayConditionHigh (°F)Low (°F)Precip (mm)Cloud Cover (%)Wind (mph)
Partly CloudyHigh 74°F23°CLow 68°F20°CPrecip 0 in0.1 mm5%Cloud 59%Wind SW 6 mph10 km/hWednesday: Mostly cloudy and warm, with a high of 74°F23°C. Breezy from the SW at 6 to 7 mph10 to 11 km/h. Wednesday Night: Mostly cloudy, with a low around 68°F20°C. Light wind from the WSW around 6 mph10 km/h.
ShowersHigh 71°F22°CLow 65°F18°CPrecip 0.07 in1.9 mm57%Cloud 47%Wind W 5 mph8 km/hThursday: Partly cloudy and warm, with a high of 71°F22°C and morning low of 66°F19°C. Light wind from the SW around 4 mph7 km/h. 57% chance of showers throughout the day. Thursday Night: Partly cloudy, with a low around 65°F18°C. Breezy from the WNW at 5 to 7 mph8 to 11 km/h. 24% chance of drizzle before dawn.
ClearHigh 74°F23°CLow 64°F18°CPrecip 0 in0 mmCloud 11%Wind NW 10 mph15 km/hFriday: Mostly clear and warm, with a high of 74°F23°C and morning low of 66°F19°C. Breezy from the NW at 11 to 12 mph17 to 20 km/h. Friday Night: Mostly clear, with a low around 64°F18°C. Breezy from the NW at 9 to 10 mph14 to 16 km/h.
ClearHigh 72°F22°CLow 63°F17°CPrecip 0 in0 mmCloud 36%Wind NW 7 mph11 km/hSaturday: Partly cloudy and warm, with a high of 72°F22°C and morning low of 64°F18°C. Breezy from the NW at 7 to 8 mph10 to 13 km/h. Saturday Night: Partly cloudy, with a low around 63°F17°C. Breezy from the WNW at 8 to 9 mph12 to 14 km/h.
RainHigh 68°F20°CLow 63°F17°CPrecip 0.33 in8.3 mm74%Cloud 81%Wind SSE 8 mph13 km/hSunday: Overcast and warm, with a high of 68°F20°C. Breezy from the SSE at 8 to 11 mph12 to 18 km/h. 29% chance of light rain in the afternoon. Sunday Night: Overcast, with a low around 63°F17°C. Breezy from the S at 9 to 14 mph15 to 22 km/h. 74% chance of rain in the evening.
RainHigh 69°F21°CLow 66°F19°CPrecip 0.58 in14.8 mm81%Cloud 76%Wind ESE 11 mph18 km/hMonday: Overcast and warm, with a high of 69°F21°C. Breezy from the NE at 11 to 12 mph17 to 19 km/h. 72% chance of rain throughout the day. Monday Night: Mostly cloudy, with a low around 66°F19°C. Breezy from the SSE at 11 to 14 mph18 to 22 km/h. 81% chance of rain throughout the night.
ClearHigh 71°F22°CLow 64°F18°CPrecip 0.01 in0.3 mm8%Cloud 39%Wind NNW 8 mph12 km/hTuesday: Partly cloudy and warm, with a high of 71°F22°C and morning low of 65°F18°C. Breezy from the N at 7 to 9 mph11 to 14 km/h. Tuesday Night: Partly cloudy, with a low around 64°F18°C. Breezy from the NW at 8 to 9 mph13 to 15 km/h.

15-Day Forecast

Day High Low Precip Cloud Cover Condition Wind
WednesdayAug 1274°F23°C68°F20°C0 in0.1 mm· 5%59%Partly CloudySW 6 mph10 km/h
ThursdayAug 1371°F22°C65°F18°C0.07 in1.9 mm· 57%47%ShowersW 5 mph8 km/h
FridayAug 1474°F23°C64°F18°C0 in0 mm· —11%ClearNW 10 mph15 km/h
SaturdayAug 1572°F22°C63°F17°C0 in0 mm· —36%ClearNW 7 mph11 km/h
SundayAug 1668°F20°C63°F17°C0.33 in8.3 mm· 74%81%RainSSE 8 mph13 km/h
MondayAug 1769°F21°C66°F19°C0.58 in14.8 mm· 81%76%RainESE 11 mph18 km/h
TuesdayAug 1871°F22°C64°F18°C0.01 in0.3 mm· 8%39%ClearNNW 8 mph12 km/h
WednesdayAug 1971°F22°C64°F18°C0.01 in0.3 mm· 6%57%Partly CloudySSW 8 mph13 km/h
ThursdayAug 2071°F22°C66°F19°C0.19 in4.7 mm· 40%67%ShowersSSW 10 mph17 km/h
FridayAug 2172°F22°C66°F19°C0.12 in3 mm· 20%47%ShowersWNW 10 mph16 km/h
SaturdayAug 2270°F21°C64°F18°C0.1 in2.5 mm· 21%48%ShowersW 9 mph14 km/h
SundayAug 2370°F21°C64°F18°C0.1 in2.6 mm· 17%48%ShowersWSW 9 mph14 km/h
MondayAug 2470°F21°C64°F18°C0.08 in2 mm· 16%46%DrizzleWSW 9 mph14 km/h
TuesdayAug 2570°F21°C63°F17°C0.07 in1.7 mm· 14%40%ShowersW 9 mph14 km/h
WednesdayAug 2670°F21°C63°F17°C0.08 in2 mm· 16%41%ShowersWSW 9 mph14 km/h

Nearby Cities

About This Forecast

This forecast is powered by WeatherMesh, the world's most advanced and accurate weather model powered by AI. WeatherMesh is built on proprietary data from WindBorne's Global Sounding Balloon constellation — the world's largest fleet of autonomous, long-duration weather balloons — collecting observations across 100% of Earth, including over oceans and remote regions where no other data exists.

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Coordinates: 43.6415°N, 70.2409°W·Elevation: 7m·Timezone: America/New_York·Population: 25,556