Isle of Portland (Dorset) weather

Find a forecast

Forecast days

Tue 15 Sep

Maximum daytime temperature: 20° Celsius; Minimum nighttime temperature: 15° Celsius;

Sunrise: 06:46

Sunset: 19:24

Sunny.

M UV

L Pollution

No pollen data.

Next low tide: 14:46 for
Church Ope Cove (Beach)

Tue 15 Sep

Maximum daytime temperature: 20 degrees Celsius; Minimum nighttime temperature: 15 degrees Celsius;
Wed 16 Sep

Maximum daytime temperature: 19° Celsius; Minimum nighttime temperature: 16° Celsius;

Sunrise: 06:47

Sunset: 19:21

Sunny intervals changing to partly cloudy by early evening.

M UV

L Pollution

No pollen data.

First high tide: 10:18 for
Church Ope Cove (Beach)

Wed 16 Sep

Maximum daytime temperature: 19 degrees Celsius; Minimum nighttime temperature: 16 degrees Celsius;
Thu 17 Sep

Maximum daytime temperature: 19° Celsius; Minimum nighttime temperature: 15° Celsius;

Sunrise: 06:49

Sunset: 19:19

Light showers changing to sunny intervals by late morning.

M UV

L Pollution

No pollen data.

First high tide: 10:41 for
Church Ope Cove (Beach)

Thu 17 Sep

Maximum daytime temperature: 19 degrees Celsius; Minimum nighttime temperature: 15 degrees Celsius;
Fri 18 Sep

Maximum daytime temperature: 18° Celsius; Minimum nighttime temperature: 17° Celsius;

Sunrise: 06:50

Sunset: 19:17

Sunny intervals changing to cloudy in the afternoon.

M UV

L Pollution

No pollen data.

First high tide: 11:08 for
Church Ope Cove (Beach)

Fri 18 Sep

Maximum daytime temperature: 18 degrees Celsius; Minimum nighttime temperature: 17 degrees Celsius;
Sat 19 Sep

Maximum daytime temperature: 20° Celsius; Minimum nighttime temperature: 17° Celsius;

Sunrise: 06:52

Sunset: 19:15

Cloudy.

M UV

L Pollution

No pollen data.

First high tide: 11:41 for
Church Ope Cove (Beach)

Sat 19 Sep

Maximum daytime temperature: 20 degrees Celsius; Minimum nighttime temperature: 17 degrees Celsius;
Sun 20 Sep

Maximum daytime temperature: 20° Celsius; Minimum nighttime temperature: 16° Celsius;

Sunrise: 06:53

Sunset: 19:12

Cloudy changing to sunny intervals by lunchtime.

M UV

No pollution data.

No pollen data.

First high tide: 00:15 for
Church Ope Cove (Beach)

Sun 20 Sep

Maximum daytime temperature: 20 degrees Celsius; Minimum nighttime temperature: 16 degrees Celsius;
Mon 21 Sep

Maximum daytime temperature: 21° Celsius; Minimum nighttime temperature: 16° Celsius;

Sunrise: 06:55

Sunset: 19:10

Mist changing to cloudy by late morning.

M UV

No pollution data.

No pollen data.

First high tide: 01:32 for
Church Ope Cove (Beach)

Mon 21 Sep

Maximum daytime temperature: 21 degrees Celsius; Minimum nighttime temperature: 16 degrees Celsius;

Sunny.

Sunrise: 06:46

Sunset: 19:24

M UV

L Pollution

No pollen data.

Next low tide: 14:46 for

Church Ope Cove (Beach)

7 day forecast for Isle of Portland

Today (15 September 2026)

Time	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
Weather symbols
Chance of precipitation	<5%	<5%	<5%	<5%	<5%	10%	10%	<5%	<5%	<5%	<5%
Temperature (°C)	20°	20°	20°	20°	19°	18°	18°	17°	17°	16°	16°
Feels like temperature (°C)	16°	16°	15°	14°	14°	14°	13°	13°	13°	13°	13°
Wind direction and speed (mph)	W 18	W 19	WNW 21	WNW 22	WNW 22	WNW 21	WNW 21	WNW 19	NW 18	WNW 18	WNW 18
Wind gust (mph)	26	29	29	28	28	27	27	27	25	25	24
Visibility (description)	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG
Humidity	73%	66%	63%	57%	56%	62%	64%	65%	67%	71%	74%
UV	5	4	3	2	1	1	1	-	-	-	-

Wednesday (16 September 2026)

Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
Weather symbols
Chance of precipitation	<5%	<5%	10%	20%	10%	10%	20%	20%	20%	20%	20%	20%	30%	30%	10%	10%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	10%
Temperature (°C)	16°	16°	16°	16°	16°	15°	15°	15°	15°	16°	16°	17°	18°	18°	18°	18°	18°	18°	18°	17°	17°	16°	16°	16°
Feels like temperature (°C)	13°	13°	13°	13°	13°	12°	12°	12°	13°	13°	14°	15°	15°	15°	15°	15°	15°	14°	14°	14°	13°	13°	12°	12°
Wind direction and speed (mph)	NW 18	NW 17	NW 17	NW 16	NW 16	NW 16	NW 15	NW 15	NW 14	NW 14	NW 14	WNW 13	WNW 13	WNW 15	WNW 15	W 16	W 16	WNW 18	WNW 17	WNW 17	WNW 17	W 18	W 19	W 20
Wind gust (mph)	24	23	23	24	23	23	22	22	22	22	21	21	21	21	21	21	22	23	23	24	24	25	27	28
Visibility (description)	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG
Humidity	75%	75%	76%	76%	76%	75%	75%	75%	76%	75%	75%	74%	70%	66%	66%	65%	64%	64%	64%	65%	65%	65%	66%	67%
UV	-	-	-	-	-	-	1	1	1	2	3	4	4	4	4	3	2	1	1	1	-	-	-	-

Thursday (17 September 2026)

Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
Weather symbols
Chance of precipitation	20%	10%	20%	30%	40%	50%	70%	70%	60%	50%	20%	10%	<5%	<5%	10%	<5%	10%	10%	10%	10%	<5%	<5%	<5%	<5%
Temperature (°C)	16°	16°	16°	16°	16°	16°	17°	17°	17°	17°	17°	18°	18°	18°	19°	19°	18°	18°	17°	17°	16°	16°	16°	16°
Feels like temperature (°C)	12°	12°	12°	12°	12°	12°	12°	12°	12°	12°	13°	13°	14°	14°	14°	14°	13°	13°	13°	13°	12°	12°	12°	12°
Wind direction and speed (mph)	W 21	WSW 22	WSW 22	WSW 23	WSW 23	WSW 24	WSW 25	WSW 25	WSW 25	W 22	W 21	WNW 21	WNW 21	WNW 20	WNW 20	WNW 20	WNW 20	WNW 20	WNW 19	WNW 19	WNW 20	WNW 19	WNW 19	WNW 19
Wind gust (mph)	30	30	32	32	33	34	34	34	33	29	27	27	28	28	29	28	27	28	27	27	28	27	26	26
Visibility (description)	G	G	G	G	G	M	M	M	M	M	M	M	G	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG
Humidity	71%	72%	74%	76%	77%	81%	84%	85%	85%	83%	76%	69%	66%	64%	60%	58%	58%	62%	62%	64%	64%	65%	66%	66%
UV	-	-	-	-	-	-	1	1	1	1	3	4	5	5	4	3	2	1	1	1	-	-	-	-

Friday (18 September 2026)

Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
Weather symbols
Chance of precipitation	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	10%	10%	10%	30%	40%	60%	70%	70%	60%	50%	50%	50%
Temperature (°C)	16°	16°	16°	16°	16°	16°	15°	16°	16°	16°	17°	17°	18°	18°	18°	18°	18°	17°	17°	17°	17°	17°	17°	17°
Feels like temperature (°C)	12°	12°	13°	12°	13°	13°	13°	13°	13°	13°	14°	14°	14°	14°	14°	13°	13°	12°	12°	12°	12°	12°	12°	12°
Wind direction and speed (mph)	WNW 18	WNW 18	WNW 18	WNW 18	WNW 16	WNW 15	WNW 15	WNW 15	WNW 14	W 13	W 13	WSW 15	WSW 16	WSW 18	WSW 20	WSW 22	WSW 22	WSW 25	WSW 25	SW 25	SW 27	SW 28	WSW 28	WSW 28
Wind gust (mph)	26	25	25	24	23	23	22	21	19	20	21	22	25	28	30	31	33	34	35	36	36	36	37	36
Visibility (description)	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	G	G	M	M	M	M	M	M	M
Humidity	67%	68%	67%	67%	67%	66%	66%	66%	66%	66%	66%	66%	66%	68%	72%	74%	75%	77%	78%	81%	84%	85%	88%	89%
UV	-	-	-	-	-	-	1	1	1	2	3	4	4	4	3	2	1	1	1	1	-	-	-	-

Saturday (19 September 2026)

Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
Weather symbols
Chance of precipitation	30%	30%	20%	20%	10%	10%	20%	10%	10%	20%	20%	20%	20%	20%	20%	20%	20%	10%	10%	10%	10%	10%	10%	<5%
Temperature (°C)	17°	17°	17°	17°	17°	18°	18°	17°	18°	18°	18°	19°	19°	19°	19°	19°	19°	19°	19°	18°	18°	18°	18°	18°
Feels like temperature (°C)	12°	13°	13°	13°	13°	13°	13°	13°	13°	14°	14°	14°	14°	15°	14°	14°	14°	14°	15°	15°	14°	14°	14°	14°
Wind direction and speed (mph)	WSW 28	WSW 26	WSW 25	WSW 24	WSW 23	WSW 23	WSW 23	WSW 22	WSW 22	WSW 22	WSW 22	WSW 23	WSW 24	WSW 24	WSW 25	WSW 25	WSW 25	WSW 23	WSW 22	WSW 21	WSW 21	WSW 21	WSW 19	WSW 19
Wind gust (mph)	36	35	33	32	31	31	31	31	31	31	30	31	31	31	31	31	31	30	30	29	28	28	27	27
Visibility (description)	M	M	M	M	M	M	M	M	M	M	M	M	M	M	M	M	M	M	M	M	M	M	M	M
Humidity	90%	90%	90%	91%	91%	89%	88%	88%	88%	88%	87%	88%	88%	89%	90%	90%	91%	90%	89%	89%	90%	89%	89%	90%
UV	-	-	-	-	-	-	1	1	1	1	3	3	3	4	3	2	1	1	1	1	-	-	-	-

Sunday (20 September 2026)

Time	00:00	01:00	04:00	07:00	10:00	13:00	16:00	19:00	22:00
Weather symbols
Chance of precipitation	10%	<5%	<5%	<5%	<5%	10%	<5%	<5%	<5%
Temperature (°C)	18°	18°	18°	17°	18°	19°	19°	18°	17°
Feels like temperature (°C)	14°	14°	15°	15°	16°	18°	18°	16°	16°
Wind direction and speed (mph)	WSW 19	WSW 19	WSW 18	WSW 15	WSW 13	WSW 13	WSW 13	WSW 13	W 10
Wind gust (mph)	26	25	22	20	21	21	20	18	15
Visibility (description)	M	M	M	M	G	G	G	G	G
Humidity	91%	91%	91%	92%	93%	91%	90%	92%	92%
UV	-	-	-	1	2	4	2	1	-

Monday (21 September 2026)

Time	01:00	04:00	07:00	10:00	13:00	16:00	19:00	22:00
Weather symbols
Chance of precipitation	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%
Temperature (°C)	17°	17°	16°	18°	20°	20°	18°	17°
Feels like temperature (°C)	16°	16°	16°	18°	19°	20°	17°	16°
Wind direction and speed (mph)	W 9	W 9	W 9	WSW 9	SW 9	SW 9	SW 9	WSW 9
Wind gust (mph)	14	12	11	12	13	13	11	9
Visibility (description)	P	VP	VP	P	M	G	G	P
Humidity	94%	96%	96%	95%	92%	90%	92%	93%
UV	-	-	1	2	4	2	1	-

UK video forecast

Isle of Portland weather map

View the weather with our interactive map

Loading map...

in force for England

Flood warnings may be in force for England

Environment Agency

South West England weather forecast

Headline:

Turning much fresher with bright spells and showers.

Today:

A cloudy start, with outbreaks of rain sinking southeastwards. Turning drier and brighter from the west by mid-morning with plenty of dry and sunny spells. Isolated showers may form later but feeling much fresher than of late. Maximum temperature 21 °C.

Tonight:

Showers continuing in places within the northwesterly breeze, gusty around coastal areas. Turning cloudier overnight, feeling cooler than previous nights. Minimum temperature 10 °C.

Wednesday:

Winds ease through the day as they shift from a northwesterly to a wester. Showers continuing across the region, however, these will be lighter. Temperatures around average for September. Maximum temperature 19 °C.

Outlook for Thursday to Saturday:

A wet and windy day for Thursday but things starting to turn more settled again by Friday. Westerly winds develop with the odd light shower. Temperature near normal.

Updated: 04:00 (UTC+1) on Tue 15 Sep 2026

UK long range weather forecast

The first part of this period will likely see a build of pressure across much of the UK, with Atlantic weather fronts becoming more confined to northern and northwestern areas. As such, plenty of dry and increasingly warm and perhaps rather humid weather will develop, whilst the bulk of the rain and possible strong winds are more likely to affect the northwest of the UK. Many areas may remain mostly settled towards the end of September, but there is the possibility of areas of low pressure moving in from the Atlantic bringing more widely unsettled conditions.

Updated: 13:00 (UTC+1) on Tue 15 Sep 2026

A changeable theme is likely to continue, with further spells of rain and showers arriving from the North Atlantic, perhaps accompanied by strong winds at times. These are more likely to affect northern and western parts, but could also affect the wider UK if such systems push east or southeastwards. Some settled spells are also possible during this period, these most likely in the south. Temperatures for the period as a whole will probably be close to average overall.

Updated: 14:00 (UTC+1) on Mon 14 Sep 2026

Isle of Portland (Dorset) weather

Find a forecast

Forecast days

Tue 15 Sep

Tue 15 Sep

Wed 16 Sep

Wed 16 Sep

Thu 17 Sep

Thu 17 Sep

Fri 18 Sep

Fri 18 Sep

Sat 19 Sep

Sat 19 Sep

Sun 20 Sep

Sun 20 Sep

Mon 21 Sep

Mon 21 Sep

7 day forecast for Isle of Portland

Tooltip header

UK video forecast

South West England weather forecast

Headline:

Today:

Tonight:

Wednesday:

Outlook for Thursday to Saturday:

UK long range weather forecast

Nearest forecasts

Isle of Portland (Dorset) weather

Find a forecast

Forecast days

Tue 15 Sep

Tue 15 Sep

Wed 16 Sep

Wed 16 Sep

Thu 17 Sep

Thu 17 Sep

Fri 18 Sep

Fri 18 Sep

Sat 19 Sep

Sat 19 Sep

Sun 20 Sep

Sun 20 Sep

Mon 21 Sep

Mon 21 Sep

7 day forecast for Isle of Portland

UK video forecast

South West England weather forecast

Tuesday 15 Sep - Saturday 19 Sep

Headline:

Today:

Tonight:

Wednesday:

Outlook for Thursday to Saturday:

UK long range weather forecast

Sunday 20 Sep - Tuesday 29 Sep

Tuesday 29 Sep - Tuesday 13 Oct

Nearest forecasts