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.

Saturday
16th Aug
23

17

14

7
Sunday
17th Aug
25

18

10

7
Monday
18th Aug
20

15

10

7
Tuesday
19th Aug
17

15

0

6
Wednesday
20th Aug
16

14

0

1

5-day weather forecast updated at 04:00 on Saturday 16th August 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 Saturday 16th August 2025

Expect clear skies in Portland, Maine with a maximum temperature of 23°C, maximum UV of 7 (High) and 14 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 18 kph from the south.

23
°C maximum temperature
17
°C minimum temperature
clear skies
14
hours of sunshine
7
UV index (High)
0
mm of rainfall expected
0
no heat & humidity
18
kph wind from S

Portland weather for Sunday 17th August 2025

Expect scattered clouds in Portland, Maine with a maximum temperature of 25°C, maximum UV of 7 (High) and 10 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 17 kph from the north.

25
°C maximum temperature
18
°C minimum temperature
scattered clouds
10
hours of sunshine
7
UV index (High)
0
mm of rainfall expected
25
°C wind chill
17
kph wind from N

Portland weather for Monday 18th August 2025

Expect scattered clouds in Portland, Maine with a maximum temperature of 20°C, maximum UV of 7 (High) and 10 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 18 kph from the north.

20
°C maximum temperature
15
°C minimum temperature
scattered clouds
10
hours of sunshine
7
UV index (High)
0
mm of rainfall expected
0
no heat & humidity
18
kph wind from N

Portland weather for Tuesday 19th August 2025

Expect overcast skies in Portland, Maine with a maximum temperature of 17°C, maximum UV of 6 (High) and no hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 12 kph from the south-east.

17
°C maximum temperature
15
°C minimum temperature
overcast skies
0
hours of sunshine
6
UV index (High)
0
mm of rainfall expected
17
°C wind chill
12
kph wind from SE

Portland weather for Wednesday 20th August 2025

Expect overcast skies in Portland, Maine with a maximum temperature of 16°C, maximum UV of 1 (Low) and no hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 14 kph from the south-east.

16
°C maximum temperature
14
°C minimum temperature
overcast skies
0
hours of sunshine
1
UV index (Low)
0
mm of rainfall expected
0
no heat & humidity
14
kph wind from SE

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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