Five day weather forecast for Isle Of Portland, Dorset
Monday 16th
18:00 - Sunny
17°C

W
7mph
(9mph)
Humidity:
84
Visibility:
Very good
21:00 - Clear
15°C

WNW
7mph
(9mph)
Humidity:
93
Visibility:
Very good
Tuesday 17th
00:00 - Clear
15°C

NE
7mph
(11mph)
Humidity:
87
Visibility:
Very good
03:00 - Clear
13°C

E
7mph
(7mph)
Humidity:
90
Visibility:
Good
06:00 - Partly cloudy
15°C

N
4mph
(7mph)
Humidity:
84
Visibility:
Good
09:00 - Sunny
17°C

W
7mph
(9mph)
Humidity:
71
Visibility:
Very good
12:00 - Sunny
18°C

SW
9mph
(13mph)
Humidity:
68
Visibility:
Very good
15:00 - Sunny
18°C

WSW
11mph
(18mph)
Humidity:
72
Visibility:
Very good
18:00 - Partly cloudy
17°C

WSW
11mph
(16mph)
Humidity:
77
Visibility:
Very good
21:00 - Clear
16°C

NNW
9mph
(16mph)
Humidity:
79
Visibility:
Very good
Wednesday 18th
00:00 - Clear
15°C

NNW
9mph
(16mph)
Humidity:
84
Visibility:
Very good
03:00 - Partly cloudy
14°C

NNW
9mph
(13mph)
Humidity:
93
Visibility:
Very good
06:00 - Partly cloudy
15°C

NNW
7mph
(11mph)
Humidity:
89
Visibility:
Very good
09:00 - Sunny
18°C

WNW
7mph
(11mph)
Humidity:
77
Visibility:
Very good
12:00 - Sunny
19°C

WSW
7mph
(13mph)
Humidity:
70
Visibility:
Very good
15:00 - Sunny
19°C

WSW
9mph
(13mph)
Humidity:
68
Visibility:
Very good
18:00 - Sunny
18°C

W
9mph
(13mph)
Humidity:
72
Visibility:
Very good
21:00 - Clear
16°C

NW
11mph
(16mph)
Humidity:
82
Visibility:
Very good
Thursday 19th
00:00 - Clear
16°C

NNW
9mph
(16mph)
Humidity:
85
Visibility:
Very good
03:00 - Clear
15°C

NE
13mph
(18mph)
Humidity:
85
Visibility:
Very good
06:00 - Sunny
16°C

ENE
13mph
(18mph)
Humidity:
77
Visibility:
Very good
09:00 - Sunny
19°C

ESE
13mph
(20mph)
Humidity:
69
Visibility:
Very good
12:00 - Sunny
19°C

ESE
13mph
(25mph)
Humidity:
60
Visibility:
Very good
15:00 - Sunny
20°C

ESE
16mph
(25mph)
Humidity:
54
Visibility:
Very good
18:00 - Sunny
18°C

ESE
13mph
(22mph)
Humidity:
57
Visibility:
Very good
21:00 - Clear
17°C

ESE
18mph
(25mph)
Humidity:
66
Visibility:
Very good
Friday 20th
00:00 - Cloudy
17°C

E
18mph
(27mph)
Humidity:
68
Visibility:
Very good
03:00 - Cloudy
16°C

E
18mph
(27mph)
Humidity:
74
Visibility:
Very good
06:00 - Cloudy
17°C

E
16mph
(25mph)
Humidity:
76
Visibility:
Very good
09:00 - Cloudy
19°C

ESE
16mph
(27mph)
Humidity:
66
Visibility:
Very good
12:00 - Cloudy
19°C

ESE
18mph
(29mph)
Humidity:
55
Visibility:
Very good
15:00 - Sunny
20°C

ESE
18mph
(27mph)
Humidity:
50
Visibility:
Very good
18:00 - Sunny
19°C

ESE
16mph
(25mph)
Humidity:
54
Visibility:
Very good
21:00 - Clear
18°C

E
18mph
(25mph)
Humidity:
62
Visibility:
Very good

Fine for most and feeling very warm in the sunshine.
This Evening and Tonight:
Any cloud gradually melting away to leave some late sunshine for many. Staying dry overnight with fog patches developing inland under the clear skies. Generally mild but becoming locally cool in the countryside. Perhaps turning somewhat cloudier in Cornwall later. Minimum Temperature 8C.
Tuesday:
Any early mist and fog soon clearing, then dry, warm and sunny for most. A little cloudier and cooler in Cornwall and north Devon and slightly breezier than on Monday. Maximum Temperature 22C.
Outlook for Wednesday to Friday:
Generally fine and warm with plenty of strong sunshine. Perhaps cloudier and windier on Friday with a few showers possible. Becoming very warm in places, but cooler on many coasts.
UK Outlook for Saturday 21 Jun 2025 to Monday 30 Jun 2025:
Very warm or hot conditions will likely be the focus of the weather over the weekend and into the start of next week. Temperatures could remain in the low thirties of Celsius across parts of England, with a small chance of approaching mid thirties in some places. Heatwave thresholds may continue to be exceeded across parts of the UK at first. Temperatures overnight will also be very warm and perhaps humid for much of the UK. Across the west of the British Isles, cloudier conditions could bring showers with the odd lightning flash. Winds will also be light for most, and moderate around coasts further west. From early mid week, signs are the heat will ease, with rain and showers, and less hot conditions, perhaps moving in from the west.
Sunrise and Sunset times for Isle Of Portland:
Sunrise: 04:58 Sunset: 21:24