St Mawes (Cornwall) weather

Find a forecast

Forecast days

Thu 10 Sep

Maximum daytime temperature: 19° Celsius; Minimum nighttime temperature: 14° Celsius;

Sunrise: 06:48

Sunset: 19:45
Partly cloudy.

M UV

L Pollution

L Pollen
Next low tide: 00:34 tomorrow for
Gyllyngvase
Porthcurnick (Beach)

2.6 miles
Thu 10 Sep

Maximum daytime temperature: 19 degrees Celsius; Minimum nighttime temperature: 14 degrees Celsius;
Fri 11 Sep

Maximum daytime temperature: 20° Celsius; Minimum nighttime temperature: 12° Celsius;

Sunrise: 06:50

Sunset: 19:42
Sunny intervals.

M UV

L Pollution

L Pollen
First high tide: 06:10 for
Gyllyngvase
Porthcurnick (Beach)

2.6 miles
Fri 11 Sep

Maximum daytime temperature: 20 degrees Celsius; Minimum nighttime temperature: 12 degrees Celsius;
Sat 12 Sep

Maximum daytime temperature: 20° Celsius; Minimum nighttime temperature: 18° Celsius;

Sunrise: 06:51

Sunset: 19:40
Sunny intervals changing to overcast by early evening.

M UV

L Pollution

L Pollen
First high tide: 06:49 for
Gyllyngvase
Porthcurnick (Beach)

2.6 miles
Sat 12 Sep

Maximum daytime temperature: 20 degrees Celsius; Minimum nighttime temperature: 18 degrees Celsius;
Sun 13 Sep

Maximum daytime temperature: 21° Celsius; Minimum nighttime temperature: 17° Celsius;

Sunrise: 06:53

Sunset: 19:38
Mist changing to overcast by late morning.

M UV

L Pollution

L Pollen
First high tide: 07:25 for
Gyllyngvase
Porthcurnick (Beach)

2.6 miles
Sun 13 Sep

Maximum daytime temperature: 21 degrees Celsius; Minimum nighttime temperature: 17 degrees Celsius;
Mon 14 Sep

Maximum daytime temperature: 21° Celsius; Minimum nighttime temperature: 17° Celsius;

Sunrise: 06:54

Sunset: 19:36
Mist changing to sunny intervals by late morning.

M UV

L Pollution

L Pollen
First high tide: 07:58 for
Gyllyngvase
Porthcurnick (Beach)

2.6 miles
Mon 14 Sep

Maximum daytime temperature: 21 degrees Celsius; Minimum nighttime temperature: 17 degrees Celsius;
Tue 15 Sep

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

Sunrise: 06:56

Sunset: 19:34
Sunny intervals changing to overcast in the afternoon.

M UV

No pollution data.

No pollen data.
First high tide: 08:29 for
Gyllyngvase
Porthcurnick (Beach)

2.6 miles
Tue 15 Sep

Maximum daytime temperature: 19 degrees Celsius; Minimum nighttime temperature: 15 degrees Celsius;
Wed 16 Sep

Maximum daytime temperature: 18° Celsius; Minimum nighttime temperature: 15° Celsius;

Sunrise: 06:57

Sunset: 19:31
Overcast.

M UV

No pollution data.

No pollen data.
First high tide: 08:59 for
Gyllyngvase
Porthcurnick (Beach)

2.6 miles
Wed 16 Sep

Maximum daytime temperature: 18 degrees Celsius; Minimum nighttime temperature: 15 degrees Celsius;

Partly cloudy.

Sunrise: 06:48

Sunset: 19:45

M UV

L Pollution

L Pollen

Next low tide: 00:34 tomorrow for

Gyllyngvase

7 day forecast for St Mawes

Today (10 September 2026)

Time	23:00
Weather symbols
Chance of precipitation	10%
Temperature (°C)	17°
Feels like temperature (°C)	17°
Wind direction and speed (mph)	W 6
Wind gust (mph)	15
Visibility (description)	M
Humidity	96%
UV	-

Friday (11 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	10%	10%	40%	50%	40%	10%	20%	10%	<5%	10%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%
Temperature (°C)	16°	15°	15°	16°	15°	15°	15°	15°	16°	17°	18°	19°	20°	20°	20°	20°	20°	20°	19°	18°	15°	14°	13°	12°
Feels like temperature (°C)	16°	15°	15°	15°	15°	15°	15°	14°	15°	17°	17°	18°	18°	18°	19°	18°	19°	19°	18°	17°	15°	13°	13°	12°
Wind direction and speed (mph)	W 6	W 6	W 6	W 6	W 7	WNW 7	WNW 7	WNW 7	WNW 7	WNW 7	NW 9	NW 9	NW 9	NW 9	NW 9	NW 9	NW 8	NW 8	NW 7	NW 7	NW 5	NW 4	WNW 3	W 3
Wind gust (mph)	15	15	15	16	16	15	15	14	14	14	15	14	14	14	14	14	13	12	12	12	10	9	8	10
Visibility (description)	M	M	M	G	M	M	G	G	G	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	G	G
Humidity	96%	96%	95%	96%	96%	95%	95%	94%	92%	84%	76%	72%	66%	65%	64%	64%	65%	65%	65%	75%	85%	87%	90%	91%
UV	-	-	-	-	-	-	1	1	1	2	3	4	5	4	4	3	2	1	1	1	-	-	-	-

Saturday (12 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%	<5%	<5%	<5%	<5%	<5%	<5%	10%	10%	10%	20%	30%	30%
Temperature (°C)	12°	13°	13°	13°	13°	14°	15°	15°	17°	18°	19°	20°	20°	20°	20°	20°	20°	20°	20°	19°	19°	19°	19°	19°
Feels like temperature (°C)	12°	13°	12°	13°	13°	14°	14°	15°	16°	17°	17°	18°	18°	18°	18°	18°	18°	18°	18°	18°	18°	18°	18°	18°
Wind direction and speed (mph)	SW 3	SW 3	SW 5	SW 5	SW 5	SW 6	SW 7	SSW 7	SSW 7	SSW 9	SW 11	SW 13	SW 14	SW 14	SW 14	SW 14	SW 14	SW 13	SW 13	SW 11	SW 11	SW 11	SW 11	WSW 11
Wind gust (mph)	11	12	14	15	15	16	17	18	20	22	23	24	24	24	25	24	24	24	24	24	23	23	23	23
Visibility (description)	G	G	G	G	G	G	G	G	VG	VG	VG	VG	VG	VG	VG	VG	G	G	VG	G	M	G	M	M
Humidity	92%	92%	93%	93%	93%	93%	93%	92%	87%	84%	76%	75%	75%	75%	75%	75%	77%	82%	84%	85%	87%	89%	91%	92%
UV	-	-	-	-	-	-	1	1	1	2	3	4	4	4	4	3	2	1	1	1	-	-	-	-

Sunday (13 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	40%	40%	50%	60%	60%	50%	50%	50%	40%	40%	30%	20%	10%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	10%	10%
Temperature (°C)	19°	19°	19°	19°	19°	18°	18°	18°	18°	19°	19°	20°	20°	21°	21°	21°	21°	21°	20°	20°	19°	19°	18°	18°
Feels like temperature (°C)	18°	18°	18°	18°	18°	18°	19°	18°	18°	19°	19°	20°	20°	21°	21°	21°	20°	21°	20°	20°	19°	19°	18°	18°
Wind direction and speed (mph)	WSW 10	WSW 9	WSW 9	WSW 9	WSW 8	WSW 7	WSW 7	WSW 7	WSW 7	W 7	W 7	W 7	W 7	WSW 7	WSW 7	WSW 8	WSW 9	WSW 8	W 8	WSW 7	WSW 6	WSW 6	SW 6	SW 6
Wind gust (mph)	23	23	22	21	21	20	19	17	16	16	16	16	16	16	17	17	16	16	15	14	13	13	14	13
Visibility (description)	M	M	M	M	M	M	M	P	P	M	M	M	M	M	M	M	M	M	M	M	M	M	P	P
Humidity	93%	93%	94%	95%	96%	97%	97%	98%	97%	96%	95%	92%	89%	86%	84%	82%	82%	84%	85%	87%	92%	95%	96%	97%
UV	-	-	-	-	-	-	1	1	1	1	2	2	3	3	3	2	1	1	1	1	-	-	-	-

Monday (14 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	10%	<5%	<5%	10%	10%	10%	10%	10%	10%	10%	<5%	<5%	10%	10%	10%	10%	<5%	10%	10%	10%	10%	10%	10%	20%
Temperature (°C)	18°	18°	18°	18°	18°	18°	18°	18°	18°	19°	20°	20°	20°	21°	21°	21°	21°	20°	20°	19°	19°	19°	19°	19°
Feels like temperature (°C)	18°	18°	18°	18°	18°	18°	18°	18°	18°	19°	20°	19°	20°	20°	20°	20°	20°	20°	19°	19°	19°	19°	19°	19°
Wind direction and speed (mph)	SW 6	SW 6	SW 6	SW 6	SW 6	SW 6	SSW 6	SSW 7	SSW 7	SSW 7	SSW 8	SSW 9	SSW 9	SSW 10	SSW 11	SSW 10	SSW 10	SW 9	SW 9	SW 9	SW 7	SW 7	SW 7	SW 7
Wind gust (mph)	13	14	14	14	14	14	14	15	16	17	18	18	18	19	19	20	18	18	17	16	17	17	16	16
Visibility (description)	P	P	P	P	P	P	P	P	P	M	M	M	G	G	G	G	G	G	G	G	G	M	M	M
Humidity	97%	97%	97%	97%	97%	98%	97%	97%	95%	92%	87%	86%	83%	81%	81%	82%	83%	84%	86%	88%	91%	93%	93%	95%
UV	-	-	-	-	-	-	1	1	1	1	2	3	3	3	3	2	1	1	1	1	-	-	-	-

Tuesday (15 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	20%	20%	10%	10%	<5%	<5%	<5%	<5%	<5%
Temperature (°C)	18°	18°	18°	18°	18°	19°	18°	17°	16°
Feels like temperature (°C)	18°	18°	18°	17°	16°	16°	15°	14°	14°
Wind direction and speed (mph)	WSW 7	WSW 7	WNW 8	NW 8	NW 13	NW 14	NW 15	NW 13	NW 11
Wind gust (mph)	16	18	19	23	27	28	27	23	19
Visibility (description)	M	M	G	G	G	VG	G	VG	G
Humidity	95%	95%	92%	90%	75%	66%	65%	71%	73%
UV	-	-	-	1	2	4	2	1	-

Wednesday (16 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%	10%	<5%	<5%	<5%	10%	10%
Temperature (°C)	16°	15°	15°	16°	18°	18°	17°	16°
Feels like temperature (°C)	14°	14°	14°	15°	16°	16°	16°	15°
Wind direction and speed (mph)	NW 10	NW 9	NW 9	NW 9	WNW 9	WNW 10	WNW 9	W 8
Wind gust (mph)	18	17	18	20	21	20	16	14
Visibility (description)	G	G	G	G	VG	VG	G	G
Humidity	75%	78%	83%	76%	72%	73%	78%	86%
UV	-	-	1	2	4	2	1	-

UK video forecast

St Mawes weather map

View the weather with our interactive map

Loading map...

Flood alerts in force for England

Environment Agency

South West England weather forecast

Headline:

Changeable next few days, with sunshine and some showery rain.

This Evening and Tonight:

A band of increasingly light and patchy rain will move eastwards across the region during the evening followed by clear spells and a few showers overnight. Milder than last night with winds easing by dawn. Minimum temperature 10 °C.

Friday:

Isolated showers first thing Friday morning, but dissipating under a ridge of high pressure. This leaves brighter spells in the afternoon, especially in the west. Temperatures will be near average. Maximum temperature 21 °C.

Outlook for Saturday to Monday:

Some wet and windy weather returns later on Saturday. Sunday looks rather cloudy with patchy rain, though with lighter winds. Staying mixed into next week with bright spells and showers.

Updated: 16:00 (UTC+1) on Thu 10 Sep 2026

UK long range weather forecast

Remaining changeable, with occasional rain or showers arriving from the North Atlantic, most frequent across northern and western parts of the UK, where some strong winds will also be possible at times. However, there will also be some reasonable dry and more settled periods, especially across southern areas. Later in the month, high pressure may become more dominant in the vicinity of the UK, perhaps bringing more widely settled conditions for a time, especially away from the far north. Temperatures for the period as a whole will probably be close to average overall, but there is scope for some rather warm days at times, along with occasional relatively cool nights.

Updated: 13:00 (UTC+1) on Thu 10 Sep 2026

High pressure initially close to the UK, with a continuation of more settled conditions at times, may start to weaken its influence on the weather later in the month and into early October. As a result, it may become more changeable with a greater chance of rain or showers in places, and perhaps some strong winds at times too. Temperatures will likely be a little above average overall, with relatively cool nights possible at first tending to reduce in frequency later in the period.

Updated: 14:00 (UTC+1) on Thu 10 Sep 2026

St Mawes (Cornwall) weather

Find a forecast

Forecast days

Thu 10 Sep

Thu 10 Sep

Fri 11 Sep

Fri 11 Sep

Sat 12 Sep

Sat 12 Sep

Sun 13 Sep

Sun 13 Sep

Mon 14 Sep

Mon 14 Sep

Tue 15 Sep

Tue 15 Sep

Wed 16 Sep

Wed 16 Sep

7 day forecast for St Mawes

Tooltip header

UK video forecast

South West England weather forecast

Headline:

This Evening and Tonight:

Friday:

Outlook for Saturday to Monday:

UK long range weather forecast

Nearest forecasts

St Mawes (Cornwall) weather

Find a forecast

Forecast days

Thu 10 Sep

Thu 10 Sep

Fri 11 Sep

Fri 11 Sep

Sat 12 Sep

Sat 12 Sep

Sun 13 Sep

Sun 13 Sep

Mon 14 Sep

Mon 14 Sep

Tue 15 Sep

Tue 15 Sep

Wed 16 Sep

Wed 16 Sep

7 day forecast for St Mawes

UK video forecast

South West England weather forecast

Thursday 10 Sep - Monday 14 Sep

Headline:

This Evening and Tonight:

Friday:

Outlook for Saturday to Monday:

UK long range weather forecast

Tuesday 15 Sep - Thursday 24 Sep

Friday 25 Sep - Friday 9 Oct

Nearest forecasts