Portland weather live forecast

Today's maximum temperature in Portland is expected to be 23°C. Select a day from the live weather forecast for Portland, Maine, USA for more weather parameters.

Thursday
18th Sep
23

16

8

5
Friday
19th Sep
21

13

7

5
Saturday
20th Sep
17

10

12

6
Sunday
21st Sep
18

9

12

5
Monday
22nd Sep
21

10

12

5

5-day weather forecast updated at 04:01 on Thursday 18th September 2025 GMT

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The 5-day weather forecast for Maine (Portland) is provided by the Swiss meteorological agency, meteoblue. Find out more about our data sources.

Portland weather forecast by day

Below are the detailed weather forecasts for Portland for the next 5 days.

Portland weather for Thursday 18th September 2025

Expect broken clouds in Portland, Maine with a maximum temperature of 23°C, maximum UV of 5 (Moderate) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 11 kph from the south.

23
°C maximum temperature
16
°C minimum temperature
broken clouds
8
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
11
kph wind from S

Portland weather for Friday 19th September 2025

Expect scattered clouds in Portland, Maine with a maximum temperature of 21°C, maximum UV of 5 (Moderate) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 16 kph from the north-west.

21
°C maximum temperature
13
°C minimum temperature
scattered clouds
7
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
21
°C wind chill
16
kph wind from NW

Portland weather for Saturday 20th September 2025

Expect clear skies in Portland, Maine with a maximum temperature of 17°C, maximum UV of 6 (High) and 12 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 12 kph from the north.

17
°C maximum temperature
10
°C minimum temperature
clear skies
12
hours of sunshine
6
UV index (High)
0
mm of rainfall expected
0
no heat & humidity
12
kph wind from N

Portland weather for Sunday 21st September 2025

Expect clear skies in Portland, Maine with a maximum temperature of 18°C, maximum UV of 5 (Moderate) and 12 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 15 kph from the south.

18
°C maximum temperature
9
°C minimum temperature
clear skies
12
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
15
kph wind from S

Portland weather for Monday 22nd September 2025

Expect scattered clouds in Portland, Maine with a maximum temperature of 21°C, maximum UV of 5 (Moderate) and 12 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 17 kph from the south.

21
°C maximum temperature
10
°C minimum temperature
scattered clouds
12
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
17
kph wind from S

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Metric (°C / mm) | Imperial (°F / inches)

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Maine - quick facts
Flight time^✝	11 hours
Time difference	UK -5 hours
Language(s)	English
Currency	US Dollar
Electricity	A + B plug (120V)
Driving side	Right
Visa^✝	Yes
Why visit?	Nature
Tourist info	Maine Office of Tourism