Current Conditions

South Portland, Maine

63°F17°C

Cloudy

Wind

ESE 4 mph7 km/h

Humidity

95%

Cloud Cover

64%

As of Tuesday, September 1, 2026 at 11:52 PM EDT

Today's Outlook

Night

Overcast, with a low around 62°F16°C. Breezy from the ESE at 7 to 8 mph12 to 14 km/h.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Cloudy	High 65°F18°C	Low 61°F16°C	Precip 0.01 in0.2 mm7%	Cloud 90%	Wind ESE 7 mph12 km/h	Wednesday: Overcast and mild, with a high of 65°F18°C. Breezy from the ESE at 8 mph12 km/h. Wednesday Night: Overcast, with a low around 62°F16°C. Breezy from the ESE at 7 to 8 mph12 to 14 km/h.
Rain	High 67°F20°C	Low 64°F18°C	Precip 0.85 in21.6 mm99%	Cloud 88%	Wind SSE 8 mph13 km/h	Thursday: Overcast and mild, with a high of 67°F20°C. Breezy from the SSE at 9 to 11 mph14 to 17 km/h. 99% chance of rain throughout the day. Thursday Night: Overcast, with a low around 64°F18°C. Breezy from the SSE at 7 to 11 mph12 to 18 km/h. 90% chance of rain overnight.
Drizzle	High 71°F22°C	Low 64°F18°C	Precip 0.04 in1 mm30%	Cloud 54%	Wind NW 6 mph9 km/h	Friday: Partly cloudy and warm, with a high of 71°F22°C and morning low of 64°F18°C. Light wind from the WNW around 5 mph8 km/h. 30% chance of drizzle in the afternoon. Friday Night: Mostly cloudy, with a low around 64°F18°C. Breezy from the NW at 6 to 10 mph10 to 16 km/h. 13% chance of drizzle before dawn.
Drizzle	High 67°F19°C	Low 62°F17°C	Precip 0.05 in1.3 mm21%	Cloud 57%	Wind N 13 mph22 km/h	Saturday: Mostly cloudy and mild, with a high of 67°F19°C. Breezy from the N at 14 to 15 mph23 to 24 km/h. 21% chance of drizzle throughout the day. Saturday Night: Partly cloudy, with a low around 62°F17°C. Breezy from the N at 13 to 15 mph21 to 24 km/h. 18% chance of drizzle in the evening.
Drizzle	High 67°F20°C	Low 59°F15°C	Precip 0.03 in0.8 mm13%	Cloud 54%	Wind N 13 mph21 km/h	Sunday: Mostly cloudy and mild, with a high of 67°F20°C and morning low of 59°F15°C. Windy from the N at 14 to 16 mph23 to 26 km/h. 13% chance of drizzle in the morning. Sunday Night: Partly cloudy, with a low around 59°F15°C. Breezy from the N at 12 to 15 mph20 to 24 km/h. 13% chance of drizzle overnight.
Clear	High 70°F21°C	Low 59°F15°C	Precip 0 in0 mm—	Cloud 23%	Wind NW 8 mph13 km/h	Monday: Mostly clear and warm, with a high of 70°F21°C and morning low of 60°F16°C. Breezy from the NW at 7 to 9 mph12 to 15 km/h. Monday Night: Partly cloudy, with a low around 59°F15°C. Breezy from the NW at 9 to 11 mph15 to 17 km/h.
Partly Cloudy	High 69°F21°C	Low 61°F16°C	Precip 0.01 in0.3 mm5%	Cloud 45%	Wind WNW 9 mph14 km/h	Tuesday: Partly cloudy and warm, with a high of 69°F21°C and morning low of 62°F16°C. Breezy from the WNW at 8 to 9 mph14 to 15 km/h. Tuesday Night: Partly cloudy, with a low around 61°F16°C. Breezy from the WNW at 9 mph14 km/h.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	WednesdaySep 2	65°F18°C	61°F16°C	0.01 in0.2 mm· 7%	90%	Cloudy	ESE 7 mph12 km/h
DayOvercast and mild, with a high of 65°F18°C. Breezy from the ESE at 8 mph12 km/h. NightOvercast, with a low around 62°F16°C. Breezy from the ESE at 7 to 8 mph12 to 14 km/h.
	ThursdaySep 3	67°F20°C	64°F18°C	0.85 in21.6 mm· 99%	88%	Rain	SSE 8 mph13 km/h
DayOvercast and mild, with a high of 67°F20°C. Breezy from the SSE at 9 to 11 mph14 to 17 km/h. 99% chance of rain throughout the day. NightOvercast, with a low around 64°F18°C. Breezy from the SSE at 7 to 11 mph12 to 18 km/h. 90% chance of rain overnight.
	FridaySep 4	71°F22°C	64°F18°C	0.04 in1 mm· 30%	54%	Drizzle	NW 6 mph9 km/h
DayPartly cloudy and warm, with a high of 71°F22°C and morning low of 64°F18°C. Light wind from the WNW around 5 mph8 km/h. 30% chance of drizzle in the afternoon. NightMostly cloudy, with a low around 64°F18°C. Breezy from the NW at 6 to 10 mph10 to 16 km/h. 13% chance of drizzle before dawn.
	SaturdaySep 5	67°F19°C	62°F17°C	0.05 in1.3 mm· 21%	57%	Drizzle	N 13 mph22 km/h
DayMostly cloudy and mild, with a high of 67°F19°C. Breezy from the N at 14 to 15 mph23 to 24 km/h. 21% chance of drizzle throughout the day. NightPartly cloudy, with a low around 62°F17°C. Breezy from the N at 13 to 15 mph21 to 24 km/h. 18% chance of drizzle in the evening.
	SundaySep 6	67°F20°C	59°F15°C	0.03 in0.8 mm· 13%	54%	Drizzle	N 13 mph21 km/h
DayMostly cloudy and mild, with a high of 67°F20°C and morning low of 59°F15°C. Windy from the N at 14 to 16 mph23 to 26 km/h. 13% chance of drizzle in the morning. NightPartly cloudy, with a low around 59°F15°C. Breezy from the N at 12 to 15 mph20 to 24 km/h. 13% chance of drizzle overnight.
	MondaySep 7	70°F21°C	59°F15°C	0 in0 mm· —	23%	Clear	NW 8 mph13 km/h
DayMostly clear and warm, with a high of 70°F21°C and morning low of 60°F16°C. Breezy from the NW at 7 to 9 mph12 to 15 km/h. NightPartly cloudy, with a low around 59°F15°C. Breezy from the NW at 9 to 11 mph15 to 17 km/h.
	TuesdaySep 8	69°F21°C	61°F16°C	0.01 in0.3 mm· 5%	45%	Partly Cloudy	WNW 9 mph14 km/h
DayPartly cloudy and warm, with a high of 69°F21°C and morning low of 62°F16°C. Breezy from the WNW at 8 to 9 mph14 to 15 km/h. NightPartly cloudy, with a low around 61°F16°C. Breezy from the WNW at 9 mph14 km/h.
	WednesdaySep 9	67°F19°C	60°F16°C	0.05 in1.3 mm· 16%	67%	Drizzle	SSW 9 mph15 km/h
DayMostly cloudy and mild, with a high of 67°F19°C and morning low of 61°F16°C. Breezy from the SSW at 9 to 11 mph15 to 18 km/h. 12% chance of drizzle in the afternoon. NightMostly cloudy, with a low around 60°F16°C. Breezy from the SW at 10 to 11 mph16 to 18 km/h. 16% chance of drizzle throughout the night.
	ThursdaySep 10	70°F21°C	64°F18°C	0.15 in3.8 mm· 32%	65%	Showers	SW 11 mph18 km/h
DayMostly cloudy and warm, with a high of 70°F21°C and morning low of 64°F18°C. Breezy from the SW at 11 to 12 mph18 to 19 km/h. 29% chance of showers throughout the day. NightMostly cloudy, with a low around 64°F18°C. Breezy from the SW at 11 mph18 km/h. 32% chance of showers throughout the night.
	FridaySep 11	69°F21°C	64°F18°C	0.09 in2.4 mm· 14%	49%	Drizzle	W 10 mph16 km/h
DayPartly cloudy and warm, with a high of 69°F21°C and morning low of 64°F18°C. Breezy from the W at 10 to 11 mph16 to 17 km/h. 14% chance of drizzle throughout the day. NightPartly cloudy, with a low around 64°F18°C. Breezy from the W at 10 mph17 km/h. 12% chance of drizzle throughout the night.
	SaturdaySep 12	67°F20°C	62°F17°C	0.11 in2.7 mm· 20%	54%	Showers	WSW 10 mph16 km/h
DayMostly cloudy and mild, with a high of 67°F20°C and morning low of 62°F17°C. Breezy from the WSW at 10 to 11 mph16 to 17 km/h. 19% chance of showers throughout the day. NightMostly cloudy, with a low around 62°F17°C. Breezy from the W at 10 mph16 km/h. 20% chance of drizzle throughout the night.
	SundaySep 13	67°F19°C	61°F16°C	0.1 in2.6 mm· 19%	50%	Showers	WSW 10 mph17 km/h
DayPartly cloudy and mild, with a high of 67°F19°C and morning low of 61°F16°C. Breezy from the SW at 10 to 11 mph16 to 18 km/h. 18% chance of showers throughout the day. NightMostly cloudy, with a low around 61°F16°C. Breezy from the WSW at 11 mph17 km/h. 19% chance of showers throughout the night.
	MondaySep 14	67°F20°C	61°F16°C	0.07 in1.9 mm· 13%	52%	Drizzle	WSW 10 mph16 km/h
DayMostly cloudy and mild, with a high of 67°F20°C and morning low of 62°F16°C. Breezy from the WSW at 10 to 11 mph17 to 17 km/h. 13% chance of drizzle throughout the day. NightMostly cloudy, with a low around 61°F16°C. Breezy from the WSW at 10 to 11 mph16 to 17 km/h. 12% chance of drizzle throughout the night.
	TuesdaySep 15	65°F19°C	60°F16°C	0.13 in3.2 mm· 20%	54%	Showers	SW 10 mph16 km/h
DayMostly cloudy and mild, with a high of 65°F19°C and morning low of 60°F16°C. Breezy from the SSW at 10 to 11 mph16 to 18 km/h. 20% chance of showers throughout the day. NightMostly cloudy, with a low around 60°F16°C. Breezy from the WSW at 10 mph16 km/h. 16% chance of showers throughout the night.
	WednesdaySep 16	66°F19°C	60°F16°C	0.1 in2.5 mm· 20%	52%	Drizzle	WSW 9 mph15 km/h
DayMostly cloudy and mild, with a high of 66°F19°C and morning low of 60°F16°C. Breezy from the SW at 9 to 10 mph15 to 16 km/h. 16% chance of drizzle throughout the day. NightPartly cloudy, with a low around 60°F16°C. Breezy from the WSW at 9 to 10 mph15 to 16 km/h. 20% chance of drizzle throughout the night.

Nearby Cities

Portland1 mi2 km South Portland Gardens4 mi6 km Westbrook7 mi11 km West Scarborough9 mi14 km Saco14 mi23 km Biddeford15 mi24 km

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.

WeatherMesh consistently outperforms legacy models in independent benchmarks. View Benchmarks →

Access WeatherMesh forecasts programmatically via our API. API Documentation →

How to Access Weather Forecasts

Pattern	Example	Description
/weather/{country}/{city}/	/weather/united-states/san-francisco/	City forecast (canonical URL)
/weather/{city}/	/weather/tokyo/	Shorthand — redirects to most populous match
/weather/{country}/{region}/{city}/	/weather/united-states/california/san-francisco/	With region — redirects to canonical
/weather/nearby?lat={lat}&lon={lon}	/weather/nearby?lat=48.1&lon=11.5	Find nearest city by coordinates
/weather/{country}/	/weather/germany/	Country index — all cities by region

Country and city names use lowercase slugs with hyphens (e.g. united-states, san-francisco). Arbitrary city names are supported — if not in our database, we geocode the name and serve the forecast for that location.

For programmatic access, use theWindBorne Forecast APIwhich returns structured JSON for any coordinates worldwide.

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