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 morePorth Tywyn Mawr (Sandy Beach) (Isle of Anglesey) weather
Find a forecast
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.
- Head to a lifeguarded beach; check the RNLI lifeguarded beach tool
- Follow RNLI Float to Live advice if you find yourself struggling in the water
- Know what to do if you get caught in a rip current (RNLI)
- Check the tide times to avoid getting cut off by the tide coming in
- Call 999 and ask for the coastguard in an emergency
- Learn more about staying safe at the beach
Forecast days
-
Maximum daytime temperature: 21° Celsius; Minimum nighttime temperature: 13° Celsius;
Maximum daytime temperature: 21° Celsius; Minimum nighttime temperature: 13° Celsius; -
Maximum daytime temperature: 19° Celsius; Minimum nighttime temperature: 13° Celsius;
Maximum daytime temperature: 19° Celsius; Minimum nighttime temperature: 13° Celsius; -
Maximum daytime temperature: 21° Celsius; Minimum nighttime temperature: 13° Celsius;
Maximum daytime temperature: 21° Celsius; Minimum nighttime temperature: 13° Celsius; -
Maximum daytime temperature: 21° Celsius; Minimum nighttime temperature: 15° Celsius;
Maximum daytime temperature: 21° Celsius; Minimum nighttime temperature: 15° Celsius; -
Maximum daytime temperature: 22° Celsius; Minimum nighttime temperature: 14° Celsius;
Maximum daytime temperature: 22° Celsius; Minimum nighttime temperature: 14° Celsius;
-
Maximum daytime temperature: 21° Celsius; Minimum nighttime temperature: 13° Celsius;
Maximum daytime temperature: 21° Celsius; Minimum nighttime temperature: 13° Celsius;
-
Maximum daytime temperature: 21° Celsius; Minimum nighttime temperature: 14° Celsius;
Maximum daytime temperature: 21° Celsius; Minimum nighttime temperature: 14° Celsius;
Light showers.
Beach safety today
Use caution in the sea. Waves can be bigger or stronger than you expect, strong rips likely, strong wind may blow you off course
- • unsafe for novice surfers
- • paddle boarding/kayaking not recommended at any level
Tide: Next high tide (5.5m) at
Sunrise:
Sunset:
7 day forecast for Porth Tywyn Mawr (Sandy Beach)
Today (14 July 2025)
| Time |
21:00
|
22:00
|
23:00
|
|---|---|---|---|
| Weather symbols |  |
 |
 |
| Chance of precipitation |
60%
|
60%
|
40%
|
| Temperature |
16°
|
15°
|
15°
|
| Feels like temperature (°C) |
12°
|
11°
|
11°
|
| Wind direction and speed |
SSW
21
|
SSW
21
|
SSW
19
|
| Wind gust (mph) |
36
|
36
|
35
|
| Visibility |
E
|
E
|
E
|
| Humidity |
73%
|
76%
|
81%
|
| UV | 1 | - | - |
| Wind direction and speed |
22
|
21
|
20
|
| Height of waves offshore (m) |
0.6
|
0.7
|
0.9
|
| Period of waves offshore (s) |
7
|
7
|
8
|
| Direction of waves offshore |
|
|
|
Tuesday (15 July 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 |
20%
|
40%
|
70%
|
80%
|
90%
|
80%
|
80%
|
80%
|
90%
|
≥95%
|
≥95%
|
90%
|
70%
|
60%
|
70%
|
70%
|
70%
|
60%
|
50%
|
30%
|
20%
|
10%
|
<5%
|
10%
|
| Temperature (°C) |
15°
|
15°
|
15°
|
14°
|
14°
|
14°
|
14°
|
14°
|
15°
|
15°
|
15°
|
15°
|
15°
|
16°
|
17°
|
16°
|
17°
|
17°
|
17°
|
17°
|
17°
|
16°
|
16°
|
16°
|
| Feels like temperature (°C) |
11°
|
11°
|
11°
|
11°
|
10°
|
10°
|
10°
|
11°
|
11°
|
11°
|
11°
|
11°
|
11°
|
12°
|
13°
|
13°
|
13°
|
14°
|
14°
|
14°
|
14°
|
14°
|
14°
|
13°
|
| Wind direction and speed (mph) |
SSW
19
|
SSW
19
|
SSW
20
|
SSW
20
|
SSW
21
|
SSW
22
|
SSW
22
|
SSW
21
|
SSW
21
|
SSW
22
|
SSW
23
|
SW
23
|
SW
22
|
SW
21
|
SW
20
|
SW
19
|
SW
18
|
WSW
18
|
WSW
16
|
W
16
|
W
15
|
W
14
|
W
13
|
W
13
|
| Wind gust (mph) |
33
|
34
|
34
|
36
|
39
|
40
|
39
|
41
|
42
|
42
|
39
|
41
|
41
|
34
|
31
|
29
|
31
|
30
|
29
|
28
|
24
|
23
|
21
|
23
|
| Visibility (description) |
E
|
E
|
E
|
E
|
VG
|
M
|
G
|
G
|
M
|
M
|
M
|
M
|
G
|
E
|
E
|
E
|
E
|
E
|
E
|
E
|
E
|
E
|
E
|
E
|
| Humidity |
85%
|
85%
|
85%
|
86%
|
89%
|
90%
|
92%
|
91%
|
92%
|
92%
|
92%
|
92%
|
90%
|
87%
|
83%
|
82%
|
79%
|
78%
|
77%
|
76%
|
78%
|
82%
|
82%
|
80%
|
| UV | - | - | - | - | - | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 4 | 7 | 7 | 6 | 5 | 3 | 2 | 1 | 1 | 1 | - | - |
| Wind direction and speed (mph) |
19
|
19
|
20
|
20
|
21
|
22
|
22
|
21
|
21
|
22
|
23
|
23
|
22
|
21
|
20
|
19
|
18
|
18
|
16
|
16
|
15
|
14
|
13
|
13
|
| Height of waves offshore (m) |
1.0
|
1.0
|
0.9
|
0.9
|
0.8
|
0.7
|
0.7
|
0.8
|
0.9
|
0.9
|
1.1
|
1.4
|
1.5
|
1.4
|
1.3
|
1.1
|
0.9
|
0.7
|
0.6
|
0.5
|
0.5
|
0.5
|
0.5
|
0.6
|
| Period of waves offshore (s) |
8
|
9
|
9
|
9
|
9
|
6
|
3
|
4
|
4
|
8
|
9
|
9
|
9
|
9
|
9
|
9
|
10
|
10
|
11
|
4
|
4
|
4
|
11
|
10
|
| Direction of waves offshore |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Wednesday (16 July 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%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
10%
|
30%
|
| Temperature (°C) |
15°
|
15°
|
14°
|
15°
|
17°
|
18°
|
18°
|
17°
|
15°
|
| Feels like temperature (°C) |
13°
|
13°
|
12°
|
13°
|
16°
|
17°
|
17°
|
17°
|
15°
|
| Wind direction and speed (mph) |
WNW
13
|
WNW
14
|
WNW
11
|
NW
9
|
NW
7
|
WNW
8
|
W
7
|
WSW
5
|
S
4
|
| Wind gust (mph) |
23
|
22
|
18
|
15
|
11
|
11
|
10
|
9
|
8
|
| Visibility (description) |
E
|
E
|
VG
|
VG
|
VG
|
E
|
E
|
VG
|
VG
|
| Humidity |
79%
|
82%
|
87%
|
85%
|
76%
|
68%
|
65%
|
69%
|
85%
|
| UV | - | - | - | 1 | 5 | 7 | 4 | 1 | - |
| Wind direction and speed (mph) |
13
|
14
|
11
|
9
|
7
|
8
|
7
|
5
|
4
|
| Height of waves offshore (m) |
0.7
|
0.8
|
0.6
|
0.5
|
0.4
|
0.4
|
0.3
|
0.2
|
0.1
|
| Period of waves offshore (s) |
10
|
10
|
9
|
4
|
4
|
8
|
8
|
4
|
7
|
| Direction of waves offshore |
|
|
|
|
|
|
|
|
|
Thursday (17 July 2025)
| Time |
01:00
|
04:00
|
07:00
|
10:00
|
13:00
|
16:00
|
19:00
|
22:00
|
|---|---|---|---|---|---|---|---|---|
| Weather symbols | |
 |
|
|
|
|
|
|
| Chance of precipitation |
30%
|
30%
|
30%
|
30%
|
30%
|
20%
|
20%
|
30%
|
| Temperature (°C) |
15°
|
14°
|
16°
|
18°
|
18°
|
18°
|
18°
|
16°
|
| Feels like temperature (°C) |
14°
|
14°
|
15°
|
17°
|
17°
|
16°
|
16°
|
15°
|
| Wind direction and speed (mph) |
SSE
5
|
SSE
6
|
S
7
|
S
10
|
SSW
12
|
SSW
13
|
SSW
12
|
S
9
|
| Wind gust (mph) |
10
|
11
|
11
|
13
|
15
|
17
|
16
|
15
|
| Visibility (description) |
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
E
|
VG
|
| Humidity |
89%
|
93%
|
91%
|
90%
|
85%
|
83%
|
85%
|
94%
|
| UV | - | - | 1 | 2 | 5 | 3 | 1 | - |
| Wind direction and speed (mph) |
5
|
6
|
7
|
10
|
12
|
13
|
12
|
9
|
| Height of waves offshore (m) |
0.2
|
0.5
|
0.6
|
0.6
|
0.6
|
0.6
|
0.6
|
0.6
|
| Period of waves offshore (s) |
6
|
3
|
4
|
4
|
4
|
5
|
5
|
5
|
| Direction of waves offshore |
|
|
|
|
|
|
|
|
Friday (18 July 2025)
| Time |
01:00
|
04:00
|
07:00
|
10:00
|
13:00
|
16:00
|
19:00
|
22:00
|
|---|---|---|---|---|---|---|---|---|
| Weather symbols | |
|
|
|
|
|
|
|
| Chance of precipitation |
20%
|
30%
|
20%
|
20%
|
20%
|
10%
|
10%
|
10%
|
| Temperature (°C) |
16°
|
15°
|
16°
|
18°
|
19°
|
19°
|
18°
|
16°
|
| Feels like temperature (°C) |
15°
|
15°
|
15°
|
17°
|
17°
|
18°
|
17°
|
16°
|
| Wind direction and speed (mph) |
S
7
|
S
6
|
S
6
|
SW
8
|
SW
9
|
SW
8
|
SSW
8
|
S
5
|
| Wind gust (mph) |
13
|
13
|
11
|
12
|
12
|
12
|
12
|
11
|
| Visibility (description) |
VG
|
VG
|
VG
|
VG
|
E
|
E
|
VG
|
VG
|
| Humidity |
95%
|
94%
|
92%
|
82%
|
73%
|
71%
|
74%
|
90%
|
| UV | - | - | 1 | 4 | 7 | 5 | 1 | - |
| Wind direction and speed (mph) |
7
|
6
|
6
|
8
|
9
|
8
|
8
|
5
|
| Height of waves offshore (m) |
0.6
|
0.5
|
0.4
|
0.4
|
0.3
|
0.4
|
0.3
|
0.3
|
| Period of waves offshore (s) |
6
|
5
|
5
|
5
|
4
|
3
|
4
|
7
|
| Direction of waves offshore |
|
|
|
|
|
|
|
|
Saturday (19 July 2025)
| Time |
01:00
|
04:00
|
07:00
|
10:00
|
13:00
|
16:00
|
19:00
|
22:00
|
|---|---|---|---|---|---|---|---|---|
| Weather symbols | |
|
|
|
|
|
|
|
| Chance of precipitation |
20%
|
20%
|
30%
|
30%
|
30%
|
30%
|
30%
|
30%
|
| Temperature (°C) |
15°
|
15°
|
16°
|
18°
|
19°
|
19°
|
18°
|
16°
|
| Feels like temperature (°C) |
15°
|
15°
|
15°
|
17°
|
18°
|
18°
|
17°
|
15°
|
| Wind direction and speed (mph) |
S
5
|
S
4
|
S
5
|
SW
7
|
SW
9
|
WSW
9
|
SW
9
|
NNE
8
|
| Wind gust (mph) |
9
|
8
|
10
|
11
|
13
|
12
|
10
|
9
|
| Visibility (description) |
VG
|
G
|
G
|
VG
|
VG
|
VG
|
VG
|
G
|
| Humidity |
93%
|
95%
|
91%
|
80%
|
76%
|
76%
|
77%
|
93%
|
| UV | - | - | 1 | 4 | 7 | 4 | 1 | - |
| Wind direction and speed (mph) |
5
|
4
|
5
|
7
|
9
|
9
|
9
|
8
|
| Height of waves offshore (m) |
0.3
|
0.2
|
0.2
|
0.1
|
0.5
|
0.6
|
0.5
|
0.4
|
| Period of waves offshore (s) |
5
|
8
|
8
|
8
|
3
|
4
|
5
|
5
|
| Direction of waves offshore |
|
|
|
|
|
|
|
|
Sunday (20 July 2025)
| Time |
01:00
|
04:00
|
07:00
|
10:00
|
13:00
|
16:00
|
19:00
|
22:00
|
|---|---|---|---|---|---|---|---|---|
| Weather symbols | |
|
|
|
|
|
|
|
| Chance of precipitation |
30%
|
40%
|
40%
|
40%
|
40%
|
30%
|
30%
|
30%
|
| Temperature (°C) |
15°
|
14°
|
15°
|
18°
|
19°
|
19°
|
19°
|
17°
|
| Feels like temperature (°C) |
15°
|
14°
|
14°
|
16°
|
17°
|
18°
|
17°
|
16°
|
| Wind direction and speed (mph) |
S
7
|
SSE
7
|
S
7
|
S
9
|
WNW
11
|
NW
11
|
WNW
10
|
WNW
8
|
| Wind gust (mph) |
8
|
7
|
11
|
16
|
19
|
18
|
16
|
11
|
| Visibility (description) |
G
|
G
|
G
|
G
|
G
|
VG
|
VG
|
G
|
| Humidity |
93%
|
95%
|
92%
|
82%
|
76%
|
70%
|
77%
|
91%
|
| UV | - | - | 1 | 3 | 6 | 4 | 1 | - |
| Wind direction and speed (mph) |
7
|
– | – | – | – | – | – | – |
| Height of waves offshore (m) |
0.4
|
– | – | – | – | – | – | – |
| Period of waves offshore (s) |
5
|
– | – | – | – | – | – | – |
| Direction of waves offshore |
|
–
|
–
|
–
|
–
|
–
|
–
|
–
|
Tooltip header
Tide times
Monday 14 July
Tide times and heights are from Holyhead tidal station which is 2.3 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 14 July
Tide times and heights are from Holyhead tidal station which is 2.3 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 14 July
Tide times and heights are from Holyhead tidal station which is 2.3 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 14 July
Tide times and heights are from Holyhead tidal station which is 2.3 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 15 July
Tide times and heights are from Holyhead tidal station which is 2.3 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 15 July
Tide times and heights are from Holyhead tidal station which is 2.3 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 15 July
Tide times and heights are from Holyhead tidal station which is 2.3 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 15 July
Tide times and heights are from Holyhead tidal station which is 2.3 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 16 July
Tide times and heights are from Holyhead tidal station which is 2.3 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 16 July
Tide times and heights are from Holyhead tidal station which is 2.3 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 16 July
Tide times and heights are from Holyhead tidal station which is 2.3 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 16 July
Tide times and heights are from Holyhead tidal station which is 2.3 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 17 July
Tide times and heights are from Holyhead tidal station which is 2.3 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 17 July
Tide times and heights are from Holyhead tidal station which is 2.3 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 17 July
Tide times and heights are from Holyhead tidal station which is 2.3 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 17 July
Tide times and heights are from Holyhead tidal station which is 2.3 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 18 July
Tide times and heights are from Holyhead tidal station which is 2.3 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 18 July
Tide times and heights are from Holyhead tidal station which is 2.3 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 18 July
Tide times and heights are from Holyhead tidal station which is 2.3 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 18 July
Tide times and heights are from Holyhead tidal station which is 2.3 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 19 July
Tide times and heights are from Holyhead tidal station which is 2.3 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 19 July
Tide times and heights are from Holyhead tidal station which is 2.3 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 19 July
Tide times and heights are from Holyhead tidal station which is 2.3 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 19 July
Tide times and heights are from Holyhead tidal station which is 2.3 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 20 July
Tide times and heights are from Holyhead tidal station which is 2.3 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 20 July
Tide times and heights are from Holyhead tidal station which is 2.3 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 20 July
Tide times and heights are from Holyhead tidal station which is 2.3 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 20 July
Tide times and heights are from Holyhead tidal station which is 2.3 miles away. So times may be different at this beach. What does this mean?
Contains ADMIRALTY® tidal data: © Crown Copyright and database right.
Porth Tywyn Mawr (Sandy Beach) weather map
View the weather with our interactive map
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Wales weather forecast
Headline:
Largely dry this evening, but turning wet and windy tomorrow.
This Evening and Tonight:
A largely dry evening with late spells of sunshine, although a few showers may continue to affect western areas. Thicker cloud and outbreaks of rain will then arrive into the west by dawn. A fresher night than of late. Minimum temperature 8 °C.
Tuesday:
An unsettled start with heavy spells of thundery rain, especially in the north. Scattered heavy showers following behind with brighter intervals developing through the afternoon. Windy and cooler. Maximum temperature 21 °C.
Outlook for Wednesday to Friday:
Largely fine on Wednesday with sunny spells. An increase risk of showers on Thursday and Friday although still with some sunny intervals. Feeling warmer again.
Updated: