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Porth Trecastell (Beach) (Isle of Anglesey) weather

Here are our top tips to keep you, your friends and family safe at the beach with links to Royal National Lifeboat Institution (RNLI) and Met Office advice.

Forecast days

Light showers changing to partly cloudy by nighttime.
Beach safety today
Large, powerful waves and strong wind
  • • only experts should take part in water activities

Tide: Next low tide (1.2m) at

Sunrise iconSunrise:
Sunset iconSunset:
L UV
L Pollution
No pollen data.

7 day forecast for Porth Trecastell (Beach)

Today (21 October 2025)
Time
14:00
15:00
16:00
17:00
18:00
19:00
20:00
21:00
22:00
23:00
Weather symbols Light shower day Cloudy Light shower day Light shower day Light shower night Light shower night Light shower night Partly cloudy night Partly cloudy night Partly cloudy night
Chance of precipitation
50%
50%
50%
60%
60%
60%
60%
50%
40%
30%
Temperature
13°
13°
13°
13°
12°
12°
12°
11°
11°
11°
Feels like temperature (°C)
9°
9°
9°
9°
9°
9°
8°
8°
8°
7°
Wind direction and speed
W
23
WNW
23
WNW
23
WNW
21
WNW
20
WNW
18
WNW
18
WNW
18
WNW
18
WNW
18
Wind gust (mph)
36
36
34
32
30
30
30
29
28
27
Visibility
E
E
E
E
E
E
E
E
E
E
Humidity
84%
81%
79%
76%
76%
75%
75%
75%
76%
75%
UV 1 1 1 1 1 - - - - -
Wind direction and speed
23
23
23
21
20
18
18
18
18
18
Height of waves offshore (m)
1.5
1.6
1.6
1.5
1.5
1.4
1.3
1.3
1.2
1.2
Period of waves offshore (s)
5
6
6
6
6
6
6
6
5
5
Direction of waves offshore
Wednesday (22 October 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 Partly cloudy night Partly cloudy night Partly cloudy night Partly cloudy night Partly cloudy night Partly cloudy night Partly cloudy night Partly cloudy night Sunny intervals Sunny intervals Sunny intervals Sunny intervals Sunny intervals Sunny intervals Sunny intervals Sunny intervals Sunny intervals Sunny intervals Partly cloudy night Partly cloudy night Partly cloudy night Partly cloudy night Cloudy Cloudy
Chance of precipitation
10%
30%
30%
20%
30%
30%
30%
30%
20%
20%
30%
20%
10%
10%
10%
20%
10%
10%
10%
20%
20%
30%
30%
40%
Temperature (°C)
10°
10°
10°
10°
10°
10°
9°
9°
8°
9°
11°
12°
12°
13°
13°
13°
12°
12°
10°
9°
9°
9°
9°
9°
Feels like temperature (°C)
7°
7°
7°
7°
7°
7°
6°
6°
6°
7°
9°
10°
10°
11°
11°
10°
10°
9°
8°
7°
6°
6°
6°
6°
Wind direction and speed (mph)
WNW
18
WNW
16
WNW
16
WNW
15
WNW
15
WNW
14
WNW
13
W
12
W
11
W
10
WSW
10
WSW
10
SW
10
SW
10
SSW
11
SSW
11
S
11
SSE
12
SE
12
ESE
11
ESE
12
E
12
E
12
E
13
Wind gust (mph)
25
23
23
22
21
20
18
16
15
15
15
15
15
16
16
16
16
15
15
17
19
21
21
21
Visibility (description)
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
VG
Humidity
75%
75%
75%
75%
74%
74%
73%
68%
67%
67%
65%
66%
66%
66%
65%
65%
66%
66%
66%
70%
75%
76%
76%
77%
UV - - - - - - - 1 1 1 1 1 2 2 2 1 1 1 1 - - - - -
Wind direction and speed (mph)
18
16
16
15
15
14
13
12
11
10
10
10
10
10
11
11
11
12
12
11
12
12
12
13
Height of waves offshore (m)
1.2
1.1
1.1
1.0
1.0
0.9
0.8
0.8
0.7
0.7
0.6
0.6
0.6
0.6
0.5
0.5
0.5
0.5
0.4
0.4
0.4
0.4
0.4
0.4
Period of waves offshore (s)
5
5
5
5
5
5
5
5
5
5
4
6
8
8
8
7
7
7
7
7
7
9
10
10
Direction of waves offshore
Thursday (23 October 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 Light rain Light rain Heavy rain Heavy rain Heavy rain Heavy rain Heavy rain Light rain Light rain Light shower day Light shower day Light rain Heavy rain Light rain Light rain Light rain Light rain Light rain Light rain Overcast Overcast Overcast Overcast Overcast
Chance of precipitation
50%
60%
70%
70%
80%
80%
80%
70%
70%
70%
70%
70%
70%
70%
70%
70%
70%
70%
60%
50%
40%
40%
40%
40%
Temperature (°C)
9°
9°
9°
9°
9°
9°
9°
9°
9°
9°
10°
10°
10°
10°
10°
10°
9°
9°
9°
9°
9°
8°
8°
8°
Feels like temperature (°C)
6°
6°
6°
6°
6°
6°
6°
6°
5°
5°
6°
6°
6°
5°
5°
5°
5°
4°
4°
4°
4°
3°
3°
3°
Wind direction and speed (mph)
E
14
ENE
14
ENE
13
ENE
13
NE
14
NE
15
NNE
17
NNE
19
N
21
N
22
N
23
NNW
25
NNW
28
NNW
30
NNW
31
NW
31
NW
32
NW
33
NW
33
NW
33
WNW
33
WNW
32
WNW
31
WNW
31
Wind gust (mph)
21
22
22
20
20
21
21
20
24
28
33
41
44
44
50
46
46
48
46
44
43
42
42
40
Visibility (description)
VG
VG
VG
VG
VG
VG
VG
VG
VG
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
Humidity
79%
80%
80%
81%
84%
84%
83%
82%
82%
80%
75%
74%
77%
77%
78%
74%
71%
70%
70%
69%
70%
71%
73%
74%
UV - - - - - - - - 1 1 1 1 1 1 1 1 1 1 1 - - - - -
Wind direction and speed (mph)
14
14
13
13
14
15
17
19
21
22
23
25
28
30
31
31
32
33
33
33
33
32
31
31
Height of waves offshore (m)
0.4
0.4
0.5
0.5
0.5
0.5
0.6
0.7
0.9
1.0
1.3
1.8
2.0
2.0
2.0
2.0
1.9
1.9
2.0
2.0
2.0
2.0
2.0
2.0
Period of waves offshore (s)
10
10
10
10
9
9
9
9
8
5
6
7
7
7
7
7
7
7
7
7
7
7
7
7
Direction of waves offshore
Friday (24 October 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 Overcast Overcast Overcast Overcast Overcast Overcast Overcast Overcast Light shower day Light rain Light shower day Light shower day Light shower day Light shower day Light shower day Light shower day Light shower day Light shower day Light shower night Light shower night Light shower night Light shower night Light shower night Light shower night
Chance of precipitation
30%
30%
50%
50%
30%
40%
40%
40%
50%
50%
60%
60%
50%
50%
60%
60%
70%
70%
70%
70%
70%
70%
60%
60%
Temperature (°C)
8°
8°
8°
8°
8°
9°
9°
9°
9°
9°
9°
10°
10°
10°
11°
11°
11°
10°
10°
10°
10°
10°
10°
10°
Feels like temperature (°C)
3°
3°
3°
4°
4°
4°
4°
4°
4°
5°
5°
6°
6°
7°
7°
7°
7°
7°
6°
6°
6°
6°
6°
6°
Wind direction and speed (mph)
WNW
31
WNW
30
WNW
28
WNW
28
W
27
WNW
27
W
26
WNW
26
WNW
25
W
24
WNW
24
WNW
24
WNW
23
NW
22
WNW
22
NW
22
NW
22
NW
22
NW
21
NNW
20
NNW
20
NNW
20
NNW
20
NNW
20
Wind gust (mph)
38
38
36
35
33
32
31
30
28
28
28
28
25
26
24
24
24
24
23
22
22
22
20
24
Visibility (description)
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
Humidity
73%
70%
74%
75%
75%
75%
77%
77%
77%
77%
78%
78%
78%
77%
78%
75%
76%
75%
75%
76%
76%
78%
76%
77%
UV - - - - - - - - 1 1 1 1 1 2 1 1 1 1 1 - - - - -
Wind direction and speed (mph)
31
30
28
28
27
27
26
26
25
24
24
24
23
22
22
22
22
22
21
20
20
20
20
20
Height of waves offshore (m)
1.9
1.9
2.0
2.0
1.9
1.9
2.1
2.2
2.2
2.1
2.0
1.9
1.8
1.7
1.6
1.5
1.4
1.3
1.3
1.3
1.3
1.3
1.3
1.3
Period of waves offshore (s)
6
6
7
7
6
6
6
7
7
7
7
7
7
7
7
7
8
8
8
8
9
9
7
7
Direction of waves offshore
Saturday (25 October 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 Light shower night Light shower night Light shower night Light shower night Light shower night Light shower night Cloudy Partly cloudy night Cloudy Light shower day Sunny intervals Sunny intervals Sunny intervals Cloudy Light shower day Light shower day Light shower day Cloudy Cloudy Light shower night Light shower night Light shower night Light shower night Cloudy
Chance of precipitation
60%
60%
50%
60%
50%
50%
50%
40%
50%
50%
50%
50%
40%
50%
50%
50%
50%
50%
50%
60%
60%
60%
60%
60%
Temperature (°C)
9°
9°
9°
9°
9°
9°
9°
8°
8°
8°
9°
9°
10°
10°
10°
10°
10°
9°
9°
8°
8°
8°
8°
8°
Feels like temperature (°C)
5°
5°
5°
5°
5°
5°
4°
4°
4°
4°
5°
6°
6°
7°
6°
6°
6°
5°
5°
4°
4°
4°
4°
3°
Wind direction and speed (mph)
N
20
N
20
N
21
NNW
21
N
21
N
21
NNW
21
N
21
NNW
20
N
19
N
19
NNW
20
NNW
20
N
20
NNW
20
NNW
20
NNW
21
NNW
21
NNW
20
NNW
20
N
20
NNW
21
N
21
NNW
21
Wind gust (mph)
25
28
26
26
30
30
30
30
30
34
33
32
30
31
31
31
31
33
32
31
33
32
30
29
Visibility (description)
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
VG
Humidity
77%
76%
74%
71%
71%
71%
71%
71%
71%
72%
71%
71%
71%
67%
68%
67%
68%
67%
67%
67%
66%
67%
66%
67%
UV - - - - - - - - 1 1 1 1 1 1 1 1 1 1 - - - - - -
Wind direction and speed (mph)
20
20
21
21
21
21
21
21
20
19
19
20
20
20
20
20
21
21
20
20
20
21
21
21
Height of waves offshore (m)
1.4
1.4
1.4
1.4
1.4
1.5
1.4
1.3
1.3
1.3
1.3
1.3
1.3
1.3
1.4
1.4
1.3
1.4
1.4
1.4
1.3
1.2
1.1
1.1
Period of waves offshore (s)
6
7
7
7
7
7
7
7
7
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
Direction of waves offshore
Sunday (26 October 2025)
Time
00:00
01:00
03:00
06:00
09:00
12:00
15:00
18:00
21:00
Weather symbols Cloudy Cloudy Overcast Overcast Overcast Overcast Drizzle Cloudy Cloudy
Chance of precipitation
60%
40%
40%
40%
20%
40%
50%
40%
30%
Temperature (°C)
8°
8°
8°
8°
9°
11°
10°
10°
10°
Feels like temperature (°C)
4°
3°
4°
4°
6°
7°
7°
7°
6°
Wind direction and speed (mph)
NNW
21
NNW
20
NNW
22
NNW
21
NW
21
WNW
20
W
21
W
21
WNW
24
Wind gust (mph)
28
30
29
30
29
28
28
30
31
Visibility (description)
VG
VG
VG
VG
G
G
G
G
G
Humidity
69%
69%
71%
70%
70%
71%
72%
78%
78%
UV - - - - 1 1 1 - -
Wind direction and speed (mph)
21
20
22
21
21
20
21
21
24
Height of waves offshore (m)
1.1
1.1
1.2
1.0
1.1
1.2
1.3
1.4
1.5
Period of waves offshore (s)
6
6
6
6
6
6
6
6
6
Direction of waves offshore
Monday (27 October 2025)
Time
00:00
03:00
06:00
09:00
12:00
15:00
18:00
21:00
Weather symbols Partly cloudy night Partly cloudy night Sunny intervals Sunny intervals Sunny intervals Sunny intervals Partly cloudy night Partly cloudy night
Chance of precipitation
50%
40%
40%
30%
30%
30%
30%
30%
Temperature (°C)
10°
11°
11°
11°
12°
12°
11°
11°
Feels like temperature (°C)
6°
6°
6°
7°
8°
8°
7°
6°
Wind direction and speed (mph)
WNW
25
WNW
26
WNW
26
WNW
26
WNW
26
WNW
24
WNW
25
WNW
26
Wind gust (mph)
30
34
34
34
31
32
34
32
Visibility (description)
G
G
G
VG
VG
G
G
VG
Humidity
78%
78%
79%
77%
76%
75%
75%
74%
UV - - - 1 1 1 - -
Wind direction and speed (mph)
25
 – – – – – – –
Height of waves offshore (m)
1.6
 – – – – – – –
Period of waves offshore (s)
6
 – – – – – – –
Direction of waves offshore
–
–
–
–
–
–
–

Tide times

Tuesday 21 October

Tide times and heights are from Porth Trecastell tidal station which is 0.5 miles away. So times may be different at this beach. What does this mean?

Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

Tide times

Tuesday 21 October

Tide times and heights are from Porth Trecastell tidal station which is 0.5 miles away. So times may be different at this beach. What does this mean?

Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

Tide times

Tuesday 21 October

Tide times and heights are from Porth Trecastell tidal station which is 0.5 miles away. So times may be different at this beach. What does this mean?

Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

Tide times

Tuesday 21 October

Tide times and heights are from Porth Trecastell tidal station which is 0.5 miles away. So times may be different at this beach. What does this mean?

Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

Tide times

Wednesday 22 October

Tide times and heights are from Porth Trecastell tidal station which is 0.5 miles away. So times may be different at this beach. What does this mean?

Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

Tide times

Wednesday 22 October

Tide times and heights are from Porth Trecastell tidal station which is 0.5 miles away. So times may be different at this beach. What does this mean?

Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

Tide times

Wednesday 22 October

Tide times and heights are from Porth Trecastell tidal station which is 0.5 miles away. So times may be different at this beach. What does this mean?

Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

Tide times

Wednesday 22 October

Tide times and heights are from Porth Trecastell tidal station which is 0.5 miles away. So times may be different at this beach. What does this mean?

Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

Tide times

Thursday 23 October

Tide times and heights are from Porth Trecastell tidal station which is 0.5 miles away. So times may be different at this beach. What does this mean?

Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

Tide times

Thursday 23 October

Tide times and heights are from Porth Trecastell tidal station which is 0.5 miles away. So times may be different at this beach. What does this mean?

Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

Tide times

Thursday 23 October

Tide times and heights are from Porth Trecastell tidal station which is 0.5 miles away. So times may be different at this beach. What does this mean?

Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

Tide times

Thursday 23 October

Tide times and heights are from Porth Trecastell tidal station which is 0.5 miles away. So times may be different at this beach. What does this mean?

Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

Tide times

Friday 24 October

Tide times and heights are from Porth Trecastell tidal station which is 0.5 miles away. So times may be different at this beach. What does this mean?

Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

Tide times

Friday 24 October

Tide times and heights are from Porth Trecastell tidal station which is 0.5 miles away. So times may be different at this beach. What does this mean?

Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

Tide times

Friday 24 October

Tide times and heights are from Porth Trecastell tidal station which is 0.5 miles away. So times may be different at this beach. What does this mean?

Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

Tide times

Friday 24 October

Tide times and heights are from Porth Trecastell tidal station which is 0.5 miles away. So times may be different at this beach. What does this mean?

Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

Tide times

Saturday 25 October

Tide times and heights are from Porth Trecastell tidal station which is 0.5 miles away. So times may be different at this beach. What does this mean?

Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

Tide times

Saturday 25 October

Tide times and heights are from Porth Trecastell tidal station which is 0.5 miles away. So times may be different at this beach. What does this mean?

Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

Tide times

Saturday 25 October

Tide times and heights are from Porth Trecastell tidal station which is 0.5 miles away. So times may be different at this beach. What does this mean?

Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

Tide times

Saturday 25 October

Tide times and heights are from Porth Trecastell tidal station which is 0.5 miles away. So times may be different at this beach. What does this mean?

Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

Tide times

Sunday 26 October

Tide times and heights are from Porth Trecastell tidal station which is 0.5 miles away. So times may be different at this beach. What does this mean?

Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

Tide times

Sunday 26 October

Tide times and heights are from Porth Trecastell tidal station which is 0.5 miles away. So times may be different at this beach. What does this mean?

Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

Tide times

Sunday 26 October

Tide times and heights are from Porth Trecastell tidal station which is 0.5 miles away. So times may be different at this beach. What does this mean?

Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

Tide times

Sunday 26 October

Tide times and heights are from Porth Trecastell tidal station which is 0.5 miles away. So times may be different at this beach. What does this mean?

Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

Tide times

Monday 27 October

Tide times and heights are from Porth Trecastell tidal station which is 0.5 miles away. So times may be different at this beach. What does this mean?

Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

Tide times

Monday 27 October

Tide times and heights are from Porth Trecastell tidal station which is 0.5 miles away. So times may be different at this beach. What does this mean?

Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

Tide times

Monday 27 October

Tide times and heights are from Porth Trecastell tidal station which is 0.5 miles away. So times may be different at this beach. What does this mean?

Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

Tide times

Monday 27 October

Tide times and heights are from Porth Trecastell tidal station which is 0.5 miles away. So times may be different at this beach. What does this mean?

Contains ADMIRALTY® tidal data: © Crown Copyright and database right.

Tide times explained
News

Wind and rain marking a change in the UK weather

Warnings have been issued as the weather across the UK becomes increasingly mild but wet and windy.

Read more

UK video forecast

Porth Trecastell (Beach) weather map

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Forecast for 14:00, Tue
Updated 12:00 (UTC+1) on Tue 21 Oct 2025

Wales weather forecast

Headline:

Staying unsettled through the week.

Today:

Sunny spells and scattered showers across the country today, with some heavy downpours at times. Winds will strengthen through the day, with a keen westerly wind. Maximum temperature 16 °C.

Tonight:

Showers will gradually ease this evening and skies will clear. Winds will fall light overnight, allowing a few mist and fog patches to develop. Minimum temperature 3 °C.

Wednesday:

Any mist and fog will clear, leaving a largely dry day with sunny spells and light winds. However, heavy rain and strong winds will move into the south later. Maximum temperature 14 °C.

Outlook for Thursday to Saturday:

Unsettled weather is likely to bring heavy showers and strong winds on Thursday and Friday. Colder air will arrive from Friday, with some sunshine likely on Saturday.

Updated:

UK long range weather forecast

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