Harlech Castle (Gwynedd) weather

Find a forecast

Forecast days

Today

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

Sunrise: 06:56

Sunset: 19:24

Light rain changing to overcast in the afternoon.

L UV

L Pollution

No pollen data.

Next high tide: 07:04 for
Harlech (Beach)

Eryri / Snowdonia (Mountain region)

Today

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

Maximum daytime temperature: 18° Celsius; Minimum nighttime temperature: 13° Celsius;

Sunrise: 06:58

Sunset: 19:21

Light rain.

L UV

L Pollution

No pollen data.

First high tide: 07:54 for
Harlech (Beach)

Eryri / Snowdonia (Mountain region)

Fri 19 Sep

Maximum daytime temperature: 18° Celsius; Minimum nighttime temperature: 13° Celsius;
Sat 20 Sep

Maximum daytime temperature: 16° Celsius; Minimum nighttime temperature: 9° Celsius;

Sunrise: 06:59

Sunset: 19:19

Light rain.

M UV

L Pollution

No pollen data.

First high tide: 08:33 for
Harlech (Beach)

Eryri / Snowdonia (Mountain region)

Sat 20 Sep

Maximum daytime temperature: 16° Celsius; Minimum nighttime temperature: 9° Celsius;
Sun 21 Sep

Maximum daytime temperature: 14° Celsius; Minimum nighttime temperature: 7° Celsius;

Sunrise: 07:01

Sunset: 19:17

Light showers changing to partly cloudy by nighttime.

M UV

L Pollution

No pollen data.

First high tide: 09:07 for
Harlech (Beach)

Eryri / Snowdonia (Mountain region)

Sun 21 Sep

Maximum daytime temperature: 14° Celsius; Minimum nighttime temperature: 7° Celsius;
Mon 22 Sep

Maximum daytime temperature: 14° Celsius; Minimum nighttime temperature: 5° Celsius;

Sunrise: 07:03

Sunset: 19:14

Sunny intervals changing to partly cloudy by early evening.

M UV

No pollution data.

No pollen data.

First high tide: 09:39 for
Harlech (Beach)

Eryri / Snowdonia (Mountain region)

Mon 22 Sep

Maximum daytime temperature: 14° Celsius; Minimum nighttime temperature: 5° Celsius;
Tue 23 Sep

Maximum daytime temperature: 15° Celsius; Minimum nighttime temperature: 5° Celsius;

Sunrise: 07:05

Sunset: 19:12

Sunny intervals changing to cloudy by late morning.

M UV

No pollution data.

No pollen data.

First high tide: 10:07 for
Harlech (Beach)

Tue 23 Sep

Maximum daytime temperature: 15° Celsius; Minimum nighttime temperature: 5° Celsius;
Wed 24 Sep

Maximum daytime temperature: 16° Celsius; Minimum nighttime temperature: 6° Celsius;

Sunrise: 07:06

Sunset: 19:09

Sunny intervals changing to cloudy by lunchtime.

M UV

No pollution data.

No pollen data.

First high tide: 10:35 for
Harlech (Beach)

Wed 24 Sep

Maximum daytime temperature: 16° Celsius; Minimum nighttime temperature: 6° Celsius;

Light rain changing to overcast in the afternoon.

Sunrise: 06:56

Sunset: 19:24

L UV

L Pollution

No pollen data.

Next high tide: 07:04 for

Harlech (Beach)

Eryri / Snowdonia (Mountain region)

7 day forecast for Harlech Castle

Today (18 September 2025)

Time	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	80%	50%	60%	80%	90%	90%	80%	70%	50%	50%	50%	40%	50%	50%	40%	40%	40%	50%	50%
Temperature (°C)	15°	15°	15°	15°	15°	16°	17°	17°	17°	18°	18°	18°	18°	18°	17°	17°	17°	17°	17°
Feels like temperature (°C)	13°	13°	13°	13°	13°	14°	14°	14°	14°	14°	14°	14°	14°	14°	14°	14°	14°	14°	14°
Wind direction and speed (mph)	SW 10	SW 9	SSW 9	SSW 9	SSW 11	SSW 15	SSW 18	SSW 20	SSW 20	SSW 20	SSW 21	SSW 21	SSW 21	SSW 21	SSW 20	SSW 20	SSW 19	SSW 19	SSW 20
Wind gust (mph)	21	20	19	20	24	32	36	38	38	39	40	39	38	38	37	36	36	36	35
Visibility (description)	VG	VG	G	G	M	M	M	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG
Humidity	86%	87%	88%	92%	97%	98%	98%	96%	93%	92%	89%	88%	90%	90%	92%	92%	92%	92%	92%
UV	-	1	1	1	1	1	1	1	2	1	1	1	1	1	1	-	-	-	-

Friday (19 September 2025)

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	50%	50%	50%	50%	50%	60%	60%	70%	70%	70%	80%	80%	80%	90%	90%	90%	80%	80%	80%	80%	80%	70%	80%	80%
Temperature (°C)	17°	17°	17°	17°	17°	16°	16°	16°	16°	16°	16°	16°	16°	16°	16°	16°	16°	16°	16°	15°	15°	15°	15°	15°
Feels like temperature (°C)	14°	14°	14°	14°	13°	13°	13°	13°	13°	14°	14°	14°	15°	15°	15°	15°	15°	15°	14°	14°	14°	14°	14°	14°
Wind direction and speed (mph)	SSW 20	S 19	S 19	S 19	S 19	S 18	S 18	S 17	SSW 16	SSW 14	SSW 14	SSW 14	SSW 13	SSW 12	SW 12	SSW 11	SSW 10	SSW 9	SSW 10	SSW 9	S 7	S 7	SSW 6	S 7
Wind gust (mph)	34	34	34	34	34	33	32	30	24	22	19	20	21	19	18	15	13	12	12	12	13	12	10	10
Visibility (description)	VG	VG	VG	VG	VG	VG	VG	G	G	G	G	G	VG	VG	G	G	G	VG	G	G	VG	VG	VG	G
Humidity	92%	92%	91%	90%	90%	91%	92%	93%	95%	95%	95%	95%	95%	95%	93%	92%	92%	93%	94%	96%	96%	96%	95%	95%
UV	-	-	-	-	-	-	1	1	1	1	1	1	1	2	2	1	1	1	1	1	-	-	-	-

Saturday (20 September 2025)

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	80%	80%	70%	70%	60%	70%	60%	60%	70%	80%	80%	80%	80%	80%	80%	70%	70%	70%	70%	80%	80%	80%	80%	80%
Temperature (°C)	15°	14°	14°	14°	14°	14°	14°	14°	13°	14°	14°	14°	14°	15°	15°	15°	15°	14°	14°	14°	13°	13°	12°	12°
Feels like temperature (°C)	14°	14°	13°	13°	13°	13°	13°	13°	13°	13°	13°	13°	13°	13°	13°	13°	13°	12°	12°	11°	11°	10°	10°	10°
Wind direction and speed (mph)	SSE 7	S 6	SSE 7	SE 7	ESE 6	ESE 7	E 7	ESE 7	E 6	NE 7	NE 7	ENE 8	NE 8	NE 9	E 10	NW 11	NE 12	ESE 12	SE 12	W 13	N 13	W 13	NNW 12	N 12
Wind gust (mph)	11	11	10	11	10	11	10	12	12	14	16	16	15	15	15	17	17	19	20	21	22	23	23	21
Visibility (description)	G	G	G	G	G	G	G	G	G	G	M	M	M	M	G	G	G	VG	G	G	VG	VG	VG	VG
Humidity	95%	96%	96%	94%	94%	94%	93%	93%	93%	90%	91%	89%	91%	88%	86%	85%	85%	87%	86%	87%	87%	87%	87%	87%
UV	-	-	-	-	-	-	1	1	1	1	1	1	1	2	1	2	1	1	1	1	-	-	-	-

Sunday (21 September 2025)

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	80%	90%	90%	80%	80%	80%	70%	60%	60%	60%	60%	60%	50%	50%	50%	50%	60%	60%	60%	50%	50%	40%	30%	30%
Temperature (°C)	12°	12°	12°	11°	11°	11°	10°	10°	10°	10°	11°	12°	12°	12°	13°	13°	12°	12°	12°	11°	11°	10°	10°	10°
Feels like temperature (°C)	10°	10°	9°	9°	8°	8°	8°	8°	8°	8°	9°	9°	9°	10°	10°	10°	10°	10°	9°	9°	8°	8°	8°	8°
Wind direction and speed (mph)	NNW 12	N 12	N 12	NNE 12	N 12	N 11	N 11	N 11	N 11	N 12	NNE 13	N 13	N 14	N 14	N 14	N 14	N 13	NNE 12	NNE 12	NNE 11	NNE 10	NE 10	NNE 9	NNE 9
Wind gust (mph)	19	20	21	24	25	24	23	22	26	28	30	30	30	30	28	28	26	27	25	22	21	20	19	18
Visibility (description)	E	E	E	E	E	E	E	VG	VG	VG	E	E	E	E	E	E	E	E	E	VG	VG	VG	VG	VG
Humidity	87%	87%	87%	87%	88%	87%	87%	86%	85%	83%	80%	78%	74%	71%	68%	68%	73%	69%	74%	74%	75%	77%	78%	77%
UV	-	-	-	-	-	-	-	1	1	1	2	3	3	3	2	2	1	1	1	1	-	-	-	-

Monday (22 September 2025)

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%	20%	20%	10%	10%	20%	20%	10%	10%	10%	20%	20%	20%	20%	20%	20%	20%	20%	10%	<5%	<5%	–	–	–
Temperature (°C)	10°	10°	9°	9°	9°	9°	9°	8°	9°	10°	12°	12°	13°	13°	13°	13°	13°	13°	12°	11°	9°	8°	8°	8°
Feels like temperature (°C)	8°	8°	8°	7°	7°	7°	7°	6°	7°	9°	9°	10°	11°	11°	11°	11°	11°	10°	10°	9°	7°	7°	7°	7°
Wind direction and speed (mph)	NNE 8	NNE 8	NNE 7	NNE 7	NNE 7	NNE 7	NNE 7	NNE 7	NNE 7	NNE 8	NNE 10	NNE 11	NNE 12	NNE 12	NNE 12	NNE 12	NNE 12	NNE 11	NNE 10	NNE 8	NNE 6	NE 6	NNE 5	–
Wind gust (mph)	17	16	15	15	14	14	14	13	16	21	24	24	24	24	24	24	24	23	19	15	13	–	–	–
Visibility (description)	VG	E	E	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	VG	G	G
Humidity	77%	76%	77%	77%	79%	80%	81%	83%	81%	74%	67%	63%	59%	56%	55%	55%	56%	57%	63%	73%	80%	84%	92%	92%
UV	-	-	-	-	-	-	-	1	1	1	2	3	4	4	3	2	2	1	1	1	-	-	-	-

Tuesday (23 September 2025)

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%	10%	10%	10%	10%	10%	<5%	<5%
Temperature (°C)	8°	7°	7°	6°	12°	14°	14°	11°	9°
Feels like temperature (°C)	6°	6°	5°	5°	11°	12°	12°	10°	7°
Wind direction and speed (mph)	–	N 4	N 4	NNE 4	N 7	N 9	N 9	N 7	N 5
Wind gust (mph)	–	4	5	6	13	14	13	8	5
Visibility (description)	G	G	G	G	VG	VG	VG	VG	G
Humidity	95%	95%	96%	96%	73%	61%	60%	83%	94%
UV	-	-	-	1	2	3	1	1	-

Wednesday (24 September 2025)

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%	10%	<5%	<5%	<5%	10%
Temperature (°C)	8°	7°	7°	12°	15°	15°	12°	10°
Feels like temperature (°C)	7°	6°	6°	11°	13°	13°	11°	9°
Wind direction and speed (mph)	NNE 4	NNE 5	NE 5	ENE 6	E 9	WNW 8	NNW 7	NE 5
Wind gust (mph)	5	5	5	10	12	11	7	5
Visibility (description)	G	G	G	VG	VG	VG	VG	G
Humidity	95%	96%	97%	76%	65%	66%	86%	95%
UV	-	-	1	2	3	1	1	-

UK video forecast

Harlech Castle weather map

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WARNING

Flood alerts in force for Wales

Natural Resources Wales

Wales weather forecast

Headline:

Often cloudy with patchy rain at times.

Today:

A cloudy, damp and mild start to Thursday. Cloud breaking in the east with some brighter spells, but drizzle persisting over the hills in the west. Staying windy and humid. Maximum temperature 20 °C.

Tonight:

Remaining cloudy in the west overnight with drizzle persisting over hills. Drier in the east with a few clear spells. Windy in the northwest, but winds easing elsewhere by dawn. Minimum temperature 12 °C.

Friday:

Cloudy in the west with rain and drizzle, turning heavy at times over hills and mountains. Some brighter and drier intervals in the east. Winds continue to ease. Feeling humid. Maximum temperature 20 °C.

Outlook for Saturday to Monday:

Remaining changeable with showers or longer spells of rain on Saturday. Turning colder through Sunday as showery rain clears southeast, leaving sunny spells and showers on Monday.

Updated: 05:00 (UTC+1) on Thu 18 Sep 2025

UK long range weather forecast

Into next week, a northwest-southeast split is most likely. The best of drier spells will be in the north and northwest where some fog and frost patches are possible, but there will be spells or rain or showers in south and eastern areas, near to an area of low pressure. It will also turn colder, as a northerly flow becomes established for a time. Later in the week, more widely drier and settled conditions could develop as high pressure becomes more influential, although probably still with some coastal showers. Temperatures should gradually return closer to average in this period. Later in the period there may be a return to a more changeable pattern but this is uncertain.

Updated: 15:00 (UTC+1) on Wed 17 Sep 2025

By the beginning of October, confidence is very low in the weather regimes most likely to affect the UK. On balance, there will likely be a transition from slow-moving weather patterns to a more changeable period at some stage although the timing on this is highly uncertain. High pressure probably close to the UK, which would offer some occasional periods of dry weather, will likely give way to a more unsettled period with some short lived dry interludes during this time. Temperatures will likely fluctuate either side of, but often close to, average.

Updated: 16:00 (UTC+1) on Wed 17 Sep 2025

Harlech Castle (Gwynedd) weather

Find a forecast

Forecast days

Today

Today

Fri 19 Sep

Fri 19 Sep

Sat 20 Sep

Sat 20 Sep

Sun 21 Sep

Sun 21 Sep

Mon 22 Sep

Mon 22 Sep

Tue 23 Sep

Tue 23 Sep

Wed 24 Sep

Wed 24 Sep

7 day forecast for Harlech Castle

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UK video forecast

Wales weather forecast

Headline:

Today:

Tonight:

Friday:

Outlook for Saturday to Monday:

UK long range weather forecast

Nearest forecasts

More from the Met Office

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Lenticular clouds

What is the difference between mist, fog and haze?

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Harlech Castle (Gwynedd) weather

Find a forecast

Forecast days

Today

Today

Fri 19 Sep

Fri 19 Sep

Sat 20 Sep

Sat 20 Sep

Sun 21 Sep

Sun 21 Sep

Mon 22 Sep

Mon 22 Sep

Tue 23 Sep

Tue 23 Sep

Wed 24 Sep

Wed 24 Sep

7 day forecast for Harlech Castle

UK video forecast

Wales weather forecast

Thursday 18 Sep - Monday 22 Sep

Headline:

Today:

Tonight:

Friday:

Outlook for Saturday to Monday:

UK long range weather forecast

Monday 22 Sep - Wednesday 1 Oct

Thursday 2 Oct - Thursday 16 Oct

Nearest forecasts

More from the Met Office

Causes of climate change

When is hay fever season in the UK?

Lenticular clouds

What is the difference between mist, fog and haze?

What are the different types of rain?

3 tips for staying safe in lightning

Website feedback