Harlech Castle (Gwynedd) weather

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Forecast days

Today

Maximum daytime temperature: 22° Celsius; Minimum nighttime temperature: 12° Celsius;

Sunrise: 05:24

Sunset: 21:03

Clear.

H UV

M Pollution

M Pollen

Next high tide: 09:41 tomorrow for
Harlech (Beach)

Eryri / Snowdonia (Mountain region)

Today

Maximum daytime temperature: 22° Celsius; Minimum nighttime temperature: 12° Celsius;
Tue 13 May

Maximum daytime temperature: 25° Celsius; Minimum nighttime temperature: 11° Celsius;

Sunrise: 05:22

Sunset: 21:05

Sunny.

H UV

L Pollution

M Pollen

First high tide: 09:41 for
Harlech (Beach)

Eryri / Snowdonia (Mountain region)

Tue 13 May

Maximum daytime temperature: 25° Celsius; Minimum nighttime temperature: 11° Celsius;
Wed 14 May

Maximum daytime temperature: 23° Celsius; Minimum nighttime temperature: 7° Celsius;

Sunrise: 05:21

Sunset: 21:06

Sunny.

H UV

M Pollution

M Pollen

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

Eryri / Snowdonia (Mountain region)

Wed 14 May

Maximum daytime temperature: 23° Celsius; Minimum nighttime temperature: 7° Celsius;
Thu 15 May

Maximum daytime temperature: 20° Celsius; Minimum nighttime temperature: 7° Celsius;

Sunrise: 05:19

Sunset: 21:08

Sunny.

H UV

L Pollution

L Pollen

First high tide: 10:39 for
Harlech (Beach)

Eryri / Snowdonia (Mountain region)

Thu 15 May

Maximum daytime temperature: 20° Celsius; Minimum nighttime temperature: 7° Celsius;
Fri 16 May

Maximum daytime temperature: 21° Celsius; Minimum nighttime temperature: 6° Celsius;

Sunrise: 05:17

Sunset: 21:09

Sunny.

H UV

L Pollution

L Pollen

First high tide: 11:11 for
Harlech (Beach)

Eryri / Snowdonia (Mountain region)

Fri 16 May

Maximum daytime temperature: 21° Celsius; Minimum nighttime temperature: 6° Celsius;
Sat 17 May

Maximum daytime temperature: 20° Celsius; Minimum nighttime temperature: 6° Celsius;

Sunrise: 05:16

Sunset: 21:11

Sunny.

H UV

No pollution data.

No pollen data.

First high tide: 11:50 for
Harlech (Beach)

Eryri / Snowdonia (Mountain region)

Sat 17 May

Maximum daytime temperature: 20° Celsius; Minimum nighttime temperature: 6° Celsius;
Sun 18 May

Maximum daytime temperature: 20° Celsius; Minimum nighttime temperature: 6° Celsius;

Sunrise: 05:14

Sunset: 21:12

Sunny.

H UV

No pollution data.

No pollen data.

First high tide: 00:11 for
Harlech (Beach)

Sun 18 May

Maximum daytime temperature: 20° Celsius; Minimum nighttime temperature: 6° Celsius;
Mon 19 May

Maximum daytime temperature: 20° Celsius; Minimum nighttime temperature: 6° Celsius;

Sunrise: 05:13

Sunset: 21:14

Sunny.

H UV

No pollution data.

No pollen data.

First high tide: 01:01 for
Harlech (Beach)

Mon 19 May

Maximum daytime temperature: 20° Celsius; Minimum nighttime temperature: 6° Celsius;

Clear.

Sunrise: 05:24

Sunset: 21:03

H UV

M Pollution

M Pollen

Next high tide: 09:41 tomorrow for

Harlech (Beach)

Eryri / Snowdonia (Mountain region)

8 day forecast for Harlech Castle

Today (12 May 2025)

Time	23:00
Weather symbols
Chance of precipitation	10%
Temperature (°C)	15°
Feels like temperature (°C)	14°
Wind direction and speed (mph)	ENE 7
Wind gust (mph)	14
Visibility (description)	VG
Humidity	68%
UV	-

Tuesday (13 May 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	10%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	10%	10%	10%	<5%	<5%	<5%	<5%	<5%	<5%	<5%
Temperature (°C)	15°	14°	14°	14°	13°	13°	12°	13°	15°	18°	19°	21°	22°	22°	23°	23°	23°	23°	22°	21°	19°	17°	16°	15°
Feels like temperature (°C)	13°	13°	12°	12°	12°	11°	11°	12°	14°	16°	17°	18°	19°	20°	21°	21°	20°	20°	20°	19°	17°	15°	13°	12°
Wind direction and speed (mph)	ENE 8	ENE 8	ENE 8	ENE 9	ENE 9	ENE 8	ENE 8	NE 8	NE 8	ENE 9	E 10	ESE 10	ESE 11	ESE 10	E 9	ENE 8	ESE 9	E 10	E 10	E 9	E 9	ENE 10	ENE 12	ENE 14
Wind gust (mph)	15	15	16	17	17	18	17	16	18	19	22	24	25	25	22	22	25	24	22	20	18	18	21	23
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	67%	69%	70%	72%	72%	71%	70%	67%	60%	55%	47%	41%	41%	40%	40%	39%	38%	40%	42%	44%	48%	46%	42%	41%
UV	-	-	-	-	-	1	1	1	2	3	4	5	6	6	5	4	3	2	1	1	1	1	-	-

Wednesday (14 May 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	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%	<5%
Temperature (°C)	15°	14°	12°	12°	17°	20°	21°	20°	15°
Feels like temperature (°C)	11°	11°	10°	10°	15°	18°	19°	17°	13°
Wind direction and speed (mph)	E 14	ENE 14	ENE 13	ENE 10	ENE 8	E 7	N 7	NE 11	ENE 12
Wind gust (mph)	23	23	23	20	21	17	20	20	21
Visibility (description)	VG	VG	VG	VG	VG	VG	VG	VG	VG
Humidity	41%	43%	48%	48%	40%	36%	34%	47%	59%
UV	-	-	-	1	4	6	3	1	-

Thursday (15 May 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%	<5%	<5%	<5%	<5%	<5%
Temperature (°C)	12°	9°	9°	15°	18°	19°	18°	13°
Feels like temperature (°C)	10°	8°	8°	13°	15°	16°	15°	11°
Wind direction and speed (mph)	ENE 11	NNE 5	NNE 5	NNE 8	NNE 10	NNE 12	NNE 10	NE 7
Wind gust (mph)	19	10	15	21	24	23	20	17
Visibility (description)	VG	VG	VG	VG	VG	VG	VG	VG
Humidity	56%	65%	63%	48%	40%	40%	43%	62%
UV	-	-	1	4	6	3	1	-

Friday (16 May 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%	<5%	<5%	<5%	<5%	<5%
Temperature (°C)	10°	8°	10°	16°	19°	20°	19°	14°
Feels like temperature (°C)	9°	7°	9°	14°	17°	17°	16°	12°
Wind direction and speed (mph)	NNE 7	NE 5	NNE 4	NNE 7	NNE 9	NNE 10	NE 10	NE 8
Wind gust (mph)	15	13	14	20	22	21	19	14
Visibility (description)	VG	VG	VG	VG	VG	VG	VG	VG
Humidity	64%	71%	62%	42%	39%	40%	42%	52%
UV	-	-	1	4	6	3	1	-

Saturday (17 May 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%	<5%	<5%	<5%	<5%	<5%
Temperature (°C)	11°	9°	10°	15°	18°	19°	18°	11°
Feels like temperature (°C)	10°	8°	9°	14°	16°	17°	17°	11°
Wind direction and speed (mph)	NE 6	NE 5	NNE 4	NE 6	NNE 7	NNW 8	NE 8	ENE 4
Wind gust (mph)	11	9	11	15	15	16	13	6
Visibility (description)	VG	VG	VG	VG	VG	VG	VG	VG
Humidity	60%	71%	71%	55%	47%	46%	52%	87%
UV	-	-	1	4	6	3	1	-

Sunday (18 May 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%	<5%	<5%	<5%	<5%	<5%
Temperature (°C)	9°	8°	11°	16°	19°	19°	18°	11°
Feels like temperature (°C)	8°	7°	11°	16°	17°	17°	16°	11°
Wind direction and speed (mph)	NE 3	NE 3	ENE 3	ENE 5	NNE 7	NNE 9	NE 8	NE 4
Wind gust (mph)	6	6	8	13	16	16	13	6
Visibility (description)	G	G	VG	VG	VG	VG	VG	VG
Humidity	91%	95%	83%	59%	46%	43%	51%	86%
UV	-	-	1	4	6	3	1	-

Monday (19 May 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%	10%	<5%	<5%	<5%
Temperature (°C)	9°	8°	11°	16°	18°	19°	18°	12°
Feels like temperature (°C)	9°	7°	10°	14°	16°	17°	16°	11°
Wind direction and speed (mph)	ENE 4	ENE 4	ENE 4	E 6	ESE 8	SE 9	E 8	ENE 4
Wind gust (mph)	5	6	9	13	15	14	9	4
Visibility (description)	G	G	VG	VG	VG	VG	VG	VG
Humidity	91%	93%	81%	62%	48%	42%	48%	87%
UV	-	-	1	4	6	3	1	-

News

Thundery showers in the south, before a return to warm, dry weather for all

A temporary interruption to the fine spell of weather continues on Monday and Tuesday for some, before more settled and warm conditions return for the majority…

UK video forecast

Harlech Castle weather map

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Wales weather forecast

Headline:

Showers easing this evening. Chance of further thunderstorms on Tuesday.

This Evening and Tonight:

Any showers or thunderstorms gradually easing to leave a largely dry night, with some clear spells. Some isolated mist and fog patches forming in places by dawn. Generally mild. Minimum temperature 5 °C.

Tuesday:

Early mist and fog patches clearing to give a mostly fine day, with warm sunny spells. Chance of heavy, possibly thundery showers breaking out in the south during the afternoon. Maximum temperature 24 °C.

Outlook for Wednesday to Friday:

Staying fine and settled through the remainder of the week. Dry with plenty of sunshine by day, with clear skies overnight. Temperatures staying above average, but with some cooler nights.

Updated: 17:00 (UTC+1) on Mon 12 May 2025

UK long range weather forecast

Dry, fine, and largely sunny conditions are expected to continue for the vast majority as a slow moving area of high pressure remains dominant. The weather will continue to be warm or very warm, especially in the west, but it will likely be cooler in the east as some coastal areas see more persistent low cloud at times, compared with previous days. There is an increasing chance that conditions will turn wetter and more unsettled through the mid- to latter-part of next week, possibly following a hotter spell, as areas of rain and strengthening winds threaten from the west and/or south (the latter bringing a risk of thunderstorms) This would most likely to be accompanied by temperatures dropping nearer to average for the time of year.

Updated: 15:00 (UTC+1) on Mon 12 May 2025

The start of the period may see some more in the way of rain and showers across, especially across western parts. Fine and dry weather is more likely to prevail towards the south and east and may start to develop more widely, but occasional spells of rain and showers are still possible, with potential for thunderstorms on some days. Overall, temperatures will most likely be around or above normal for the time of year.

Updated: 16:00 (UTC+1) on Mon 12 May 2025

Harlech Castle (Gwynedd) weather

Find a forecast

Forecast days

Today

Today

Tue 13 May

Tue 13 May

Wed 14 May

Wed 14 May

Thu 15 May

Thu 15 May

Fri 16 May

Fri 16 May

Sat 17 May

Sat 17 May

Sun 18 May

Sun 18 May

Mon 19 May

Mon 19 May

8 day forecast for Harlech Castle

Tooltip header

Thundery showers in the south, before a return to warm, dry weather for all

UK video forecast

Wales weather forecast

Headline:

This Evening and Tonight:

Tuesday:

Outlook for Wednesday to Friday:

UK long range weather forecast

Nearest forecasts

More from the Met Office

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When does winter start?

What is the difference between mist, fog and haze?

When does autumn start?

4 tips for staying safe in extreme heat

Website feedback

Harlech Castle (Gwynedd) weather

Find a forecast

Forecast days

Today

Today

Tue 13 May

Tue 13 May

Wed 14 May

Wed 14 May

Thu 15 May

Thu 15 May

Fri 16 May

Fri 16 May

Sat 17 May

Sat 17 May

Sun 18 May

Sun 18 May

Mon 19 May

Mon 19 May

8 day forecast for Harlech Castle

Thundery showers in the south, before a return to warm, dry weather for all

UK video forecast

Wales weather forecast

Monday 12 May - Friday 16 May

Headline:

This Evening and Tonight:

Tuesday:

Outlook for Wednesday to Friday:

UK long range weather forecast

Saturday 17 May - Monday 26 May

Tuesday 27 May - Tuesday 10 Jun

Nearest forecasts

More from the Met Office

Causes of climate change

6 facts about the winter solstice

When does winter start?

What is the difference between mist, fog and haze?

When does autumn start?

4 tips for staying safe in extreme heat

Website feedback