Portsmouth weather live forecast

Today's maximum temperature in Portsmouth is expected to be 81°F. Select a day from the live weather forecast for Portsmouth, Dominica for more weather parameters.

Thursday
18th Dec
81

75

5

7
Friday
19th Dec
82

75

6

7
Saturday
20th Dec
82

75

6

7
Sunday
21st Dec
82

75

6

8
Monday
22nd Dec
82

75

6

8

5-day weather forecast updated at 04:03 on Thursday 18th December 2025 GMT

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

Portsmouth weather forecast by day

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

Portsmouth weather for Thursday 18th December 2025

Expect isolated thunderstorms in Portsmouth, Dominica with a maximum temperature of 81°F, low levels of heat & humidity, maximum UV of 7 (High) and 5 hours of bright sunshine. There are 2-5 mm of rainfall expected with 82% chance of some rain and a gentle breeze of 11 mph from the east.

81
°F maximum temperature
75
°F minimum temperature
isolated thunderstorms
5
hours of sunshine
7
UV index (High)
82
% chance of some rain
<5
mm of rainfall expected
L
low heat & humidity
11
mph wind from E

Portsmouth weather for Friday 19th December 2025

Expect sunshine and showers in Portsmouth, Dominica with a maximum temperature of 82°F, low levels of heat & humidity, maximum UV of 7 (High) and 6 hours of bright sunshine. There are 0-2 mm of rainfall expected with 39% chance of some rain and a gentle breeze of 11 mph from the east.

82
°F maximum temperature
75
°F minimum temperature
sunshine and showers
6
hours of sunshine
7
UV index (High)
39
% chance of some rain
<2
mm of rainfall expected
L
low heat & humidity
11
mph wind from E

Portsmouth weather for Saturday 20th December 2025

Expect sunshine and showers in Portsmouth, Dominica with a maximum temperature of 82°F, low levels of heat & humidity, maximum UV of 7 (High) and 6 hours of bright sunshine. There are 5-10 mm of rainfall expected with 78% chance of some rain and a gentle breeze of 9 mph from the east.

82
°F maximum temperature
75
°F minimum temperature
sunshine and showers
6
hours of sunshine
7
UV index (High)
78
% chance of some rain
<10
mm of rainfall expected
L
low heat & humidity
9
mph wind from E

Portsmouth weather for Sunday 21st December 2025

Expect sunshine and showers in Portsmouth, Dominica with a maximum temperature of 82°F, low levels of heat & humidity, maximum UV of 8 (Very High) and 6 hours of bright sunshine. There are 0-2 mm of rainfall expected with 55% chance of some rain and a gentle breeze of 10 mph from the east.

82
°F maximum temperature
75
°F minimum temperature
sunshine and showers
6
hours of sunshine
8
UV index (Very High)
55
% chance of some rain
<2
mm of rainfall expected
L
low heat & humidity
10
mph wind from E

Portsmouth weather for Monday 22nd December 2025

Expect sunshine and showers in Portsmouth, Dominica with a maximum temperature of 82°F, low levels of heat & humidity, maximum UV of 8 (Very High) and 6 hours of bright sunshine. There are 2-5 mm of rainfall expected with 72% chance of some rain and a gentle breeze of 9 mph from the east.