Portland weather live forecast

Today's maximum temperature in Portland is expected to be 25°C. Select a day from the live weather forecast for Portland, Maine, USA for more weather parameters.

Saturday
8th Aug
25

20

6

6
Sunday
9th Aug
28

20

9

6
Monday
10th Aug
28

19

10

4
Tuesday
11th Aug
29

20

3

6
Wednesday
12th Aug
27

18

8

7

5-day weather forecast updated at 04:00 on Saturday 8th August 2026 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 8th August 2026

Expect isolated thunderstorms in Portland, Maine with a maximum temperature of 25°C, maximum UV of 6 (High) and 6 hours of bright sunshine. There are 5-10 mm of rainfall expected with 64% chance of some rain and a light breeze of 7 kph from the south-east.

25
°C maximum temperature
20
°C minimum temperature
isolated thunderstorms
6
hours of sunshine
6
UV index (High)
64
% chance of some rain
<10
mm of rainfall expected
25
°C wind chill
7
kph wind from SE

Portland weather for Sunday 9th August 2026

Expect broken clouds in Portland, Maine with a maximum temperature of 28°C, low levels of heat & humidity, maximum UV of 6 (High) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 12 kph from the south-west.

28
°C maximum temperature
20
°C minimum temperature
broken clouds
9
hours of sunshine
6
UV index (High)
0
mm of rainfall expected
L
low heat & humidity
12
kph wind from SW

Portland weather for Monday 10th August 2026

Expect scattered clouds in Portland, Maine with a maximum temperature of 28°C, low levels of heat & humidity, maximum UV of 4 (Moderate) and 10 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 15 kph from the south.

28
°C maximum temperature
19
°C minimum temperature
scattered clouds
10
hours of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
L
low heat & humidity
15
kph wind from S

Portland weather for Tuesday 11th August 2026

Expect broken clouds in Portland, Maine with a maximum temperature of 29°C, low levels of heat & humidity, maximum UV of 6 (High) and 3 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 15 kph from the west.

29
°C maximum temperature
20
°C minimum temperature
broken clouds
3
hours of sunshine
6
UV index (High)
0
mm of rainfall expected
L
low heat & humidity
15
kph wind from W

Portland weather for Wednesday 12th August 2026

Expect scattered clouds in Portland, Maine with a maximum temperature of 27°C, low levels of heat & humidity, maximum UV of 7 (High) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 10 kph from the south.