Portland weather live forecast

Today's maximum temperature in Portland is expected to be 5°C. Select a day from the live weather forecast for Portland, Maine, USA for more weather parameters.

Thursday
18th Dec
5

-2

7

1
Friday
19th Dec
12

1

0

0
Saturday
20th Dec
1

-3

8

1
Sunday
21st Dec
5

-4

5

1
Monday
22nd Dec
-4

-7

7

1

5-day weather forecast updated at 04:00 on Thursday 18th December 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 December 2025

Expect sunshine and showers in Portland, Maine with a maximum temperature of 5°C, maximum UV of 1 (Low) and 7 hours of bright sunshine. There are 0-2 mm of rainfall expected with 27% chance of some rain and a gentle breeze of 17 kph from the south.

5
°C maximum temperature
-2
°C minimum temperature
sunshine and showers
7
hours of sunshine
1
UV index (Low)
27
% chance of some rain
<2
mm of rainfall expected
2
°C wind chill
17
kph wind from S

Portland weather for Friday 19th December 2025

Expect mostly cloudy with rain in Portland, Maine with a maximum temperature of 12°C and no hours of bright sunshine. There are 10-20 mm of rainfall expected with 99% chance of some rain and a fresh breeze of 38 kph from the south.

12
°C maximum temperature
1
°C minimum temperature
mostly cloudy with rain
0
hours of sunshine
0
UV index (None)
99
% chance of some rain
<20
mm of rainfall expected
12
°C wind chill
38
kph wind from S

Portland weather for Saturday 20th December 2025

Expect scattered clouds in Portland, Maine with a maximum temperature of 1°C, maximum UV of 1 (Low) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a fresh breeze of 29 kph from the west.

1
°C maximum temperature
-3
°C minimum temperature
scattered clouds
8
hours of sunshine
1
UV index (Low)
0
mm of rainfall expected
-5
°C wind chill
29
kph wind from W

Portland weather for Sunday 21st December 2025

Expect sunshine and showers in Portland, Maine with a maximum temperature of 5°C, maximum UV of 1 (Low) and 5 hours of bright sunshine. There are 0-2 mm of rainfall expected with 21% chance of some rain and a moderate breeze of 25 kph from the west.

5
°C maximum temperature
-4
°C minimum temperature
sunshine and showers
5
hours of sunshine
1
UV index (Low)
21
% chance of some rain
<2
mm of rainfall expected
1
°C wind chill
25
kph wind from W

Portland weather for Monday 22nd December 2025

Expect scattered clouds in Portland, Maine with a maximum temperature of -4°C, maximum UV of 1 (Low) and 7 hours of bright sunshine. There are 0 cm of snow expected and a moderate breeze of 22 kph from the north-west.