Live Weather & Forecast
Weather in South Portland
Maine, United States · Real-time conditions & 3-day outlook
6°C
Feels like 1°C
42°F / Feels 33°F
Light rain
South Portland, Maine
🌞 Daytime
Updated: 2026-04-13 06:30
Humidity
96%
Wind
31.7 km/h S
Wind Gust
47.4 km/h
Pressure
1021 mb
Visibility
11 km
UV Index
0
(Low)
Precipitation
0.59 mm
Cloud Cover
100%
Dew Point
4.3°C
Wind Degree
187°
Air Quality Index
US EPA: Good
UK DEFRA: Low (1)
CO
175.9 μg/m³
NO₂
6 μg/m³
O₃
93 μg/m³
SO₂
2.9 μg/m³
PM 2.5
5.3 μg/m³
PM 10
6.3 μg/m³
Today's Hourly Forecast
24-hour breakdown for South Portland, Maine
12 AM
5°
Patchy rain nearby
1 AM
5°
Patchy rain nearby
2 AM
5°
Patchy rain nearby
3 AM
5°
Patchy rain nearby
4 AM
5°
Patchy rain nearby
5 AM
5°
Patchy rain nearby
6 AM
6°
Light rain
7 AM
6°
Patchy rain nearby
8 AM
6°
Patchy rain nearby
9 AM
7°
Patchy rain nearby
10 AM
9°
Sunny
11 AM
11°
Sunny
12 PM
13°
Sunny
1 PM
14°
Sunny
2 PM
15°
Sunny
3 PM
17°
Sunny
4 PM
17°
Patchy rain nearby
5 PM
17°
Patchy rain nearby
6 PM
15°
Patchy rain nearby
7 PM
12°
Sunny
8 PM
13°
Partly Cloudy
9 PM
14°
Clear
10 PM
13°
Clear
11 PM
13°
Clear
3-Day Forecast
Daily overview for South Portland, Maine
Today
Patchy rain nearby
18°
/
5°
🌧️ 88% chance of rain
💧 Avg. humidity: 84%
💨 Max wind: 32.4 km/h
🌧️ Total precip: 2.7 mm
☀️ UV Index: 0.8
🌅 Sunrise: 06:02 AM
🌇 Sunset: 07:22 PM
🌙 Waning Crescent
🌑 Moon: 23% lit
Tue, Apr 14
Partly Cloudy
14°
/
5°
🌧️ 0% chance of rain
💧 Avg. humidity: 89%
💨 Max wind: 20.5 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.5
🌅 Sunrise: 06:00 AM
🌇 Sunset: 07:24 PM
🌙 Waning Crescent
🌑 Moon: 15% lit
Wed, Apr 15
Overcast
7°
/
5°
🌧️ 0% chance of rain
💧 Avg. humidity: 96%
💨 Max wind: 14.4 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 0.9
🌅 Sunrise: 05:58 AM
🌇 Sunset: 07:25 PM
🌙 Waning Crescent
🌑 Moon: 8% lit
Best Time to Visit South Portland
Plan your trip to South Portland, United States around the most favorable weather conditions.
Peak Season
June – September
Warm, dry summers — ideal for outdoor activities.
Shoulder Season
April – May, October
Fewer crowds, moderate prices, mild weather.
Off Season
November – March
Cooler temperatures; some regions may experience rain or snow.
Frequently Asked Questions
What is the current weather in South Portland?
Current conditions in South Portland: Light rain, temperature 6°C, humidity 96%.
What is the best time to visit South Portland?
The best time to visit South Portland is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in South Portland?
South Portland is located at approximately 43.6° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in South Portland?
The wettest period in South Portland is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to South Portland?
For visits to South Portland during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What country is South Portland in?
South Portland is located in United States, in the state of Maine.
What are the public holidays in South Portland in 2026?
View the 2026 public holidays for South Portland on our Holidays page.
What are the GPS coordinates used for the weather forecast in South Portland?
The weather forecast for South Portland uses coordinates 43.6382, -70.2529.