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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: 18° Celsius; Minimum nighttime temperature: 14° Celsius;
Maximum daytime temperature: 18° Celsius; Minimum nighttime temperature: 14° Celsius; -
Maximum daytime temperature: 20° Celsius; Minimum nighttime temperature: 13° Celsius;
Maximum daytime temperature: 20° Celsius; Minimum nighttime temperature: 13° Celsius;
-
Maximum daytime temperature: 18° Celsius; Minimum nighttime temperature: 12° Celsius;
Maximum daytime temperature: 18° Celsius; Minimum nighttime temperature: 12° Celsius; -
Maximum daytime temperature: 18° Celsius; Minimum nighttime temperature: 11° Celsius;
Maximum daytime temperature: 18° Celsius; Minimum nighttime temperature: 11° 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: 14° Celsius;
Maximum daytime temperature: 21° Celsius; Minimum nighttime temperature: 14° Celsius;
-
Maximum daytime temperature: 22° Celsius; Minimum nighttime temperature: 13° Celsius;
Maximum daytime temperature: 22° Celsius; Minimum nighttime temperature: 13° Celsius;
Overcast.
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 low tide (2.2m) at
Sunrise:
Sunset:
7 day forecast for Porth Tywyn Mawr (Sandy Beach)
Today (4 July 2025)
| Time |
22:00
|
23:00
|
|---|---|---|
| Weather symbols |  |
|
| Chance of precipitation |
10%
|
<5%
|
| Temperature |
15°
|
15°
|
| Feels like temperature (°C) |
12°
|
12°
|
| Wind direction and speed |
SW
22
|
SW
20
|
| Wind gust (mph) |
37
|
36
|
| Visibility |
G
|
G
|
| Humidity |
91%
|
92%
|
| UV | - | - |
| Wind direction and speed |
22
|
20
|
| Height of waves offshore (m) |
0.9
|
0.8
|
| Period of waves offshore (s) |
7
|
4
|
| Direction of waves offshore |
|
|
Saturday (5 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 |
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
10%
|
10%
|
10%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
| Temperature (°C) |
15°
|
15°
|
15°
|
15°
|
15°
|
15°
|
15°
|
15°
|
16°
|
16°
|
16°
|
17°
|
17°
|
18°
|
18°
|
18°
|
18°
|
18°
|
18°
|
17°
|
17°
|
17°
|
16°
|
16°
|
| Feels like temperature (°C) |
12°
|
12°
|
12°
|
12°
|
12°
|
13°
|
13°
|
13°
|
14°
|
14°
|
14°
|
15°
|
15°
|
15°
|
15°
|
15°
|
15°
|
16°
|
15°
|
16°
|
15°
|
15°
|
15°
|
15°
|
| Wind direction and speed (mph) |
SW
20
|
SW
20
|
SW
18
|
SW
17
|
SW
15
|
SW
14
|
SW
13
|
SW
12
|
SW
12
|
SW
13
|
SW
14
|
SW
14
|
SW
15
|
SSW
15
|
SSW
15
|
SSW
15
|
SSW
15
|
SW
14
|
SSW
14
|
SW
13
|
SW
12
|
SW
11
|
SW
9
|
WSW
10
|
| Wind gust (mph) |
35
|
34
|
32
|
30
|
28
|
27
|
25
|
25
|
24
|
24
|
25
|
25
|
25
|
25
|
25
|
25
|
24
|
24
|
24
|
23
|
23
|
22
|
21
|
21
|
| Visibility (description) |
G
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
| Humidity |
93%
|
93%
|
94%
|
94%
|
94%
|
94%
|
93%
|
93%
|
91%
|
89%
|
86%
|
86%
|
85%
|
83%
|
83%
|
83%
|
84%
|
84%
|
85%
|
85%
|
87%
|
90%
|
90%
|
88%
|
| UV | - | - | - | - | 1 | 1 | 1 | 1 | 1 | 2 | 3 | 4 | 4 | 5 | 5 | 5 | 3 | 2 | 1 | 1 | 1 | 1 | - | - |
| Wind direction and speed (mph) |
20
|
20
|
18
|
17
|
15
|
14
|
13
|
12
|
12
|
13
|
14
|
14
|
15
|
15
|
15
|
15
|
15
|
14
|
14
|
13
|
12
|
11
|
9
|
10
|
| Height of waves offshore (m) |
0.8
|
0.8
|
0.7
|
0.7
|
0.8
|
0.7
|
0.7
|
0.6
|
0.6
|
0.6
|
0.6
|
0.5
|
0.5
|
0.5
|
0.5
|
0.5
|
0.5
|
0.5
|
0.5
|
0.5
|
0.5
|
0.5
|
0.4
|
0.4
|
| Period of waves offshore (s) |
4
|
5
|
5
|
5
|
7
|
7
|
7
|
8
|
4
|
4
|
4
|
4
|
4
|
4
|
4
|
4
|
4
|
4
|
4
|
7
|
7
|
7
|
4
|
3
|
| Direction of waves offshore |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Sunday (6 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%
|
40%
|
60%
|
40%
|
30%
|
20%
|
20%
|
20%
|
10%
|
| Temperature (°C) |
16°
|
16°
|
14°
|
14°
|
15°
|
16°
|
17°
|
16°
|
15°
|
| Feels like temperature (°C) |
15°
|
14°
|
13°
|
12°
|
12°
|
13°
|
14°
|
13°
|
11°
|
| Wind direction and speed (mph) |
WSW
10
|
W
11
|
W
12
|
WNW
13
|
WNW
14
|
WNW
15
|
WNW
14
|
NW
15
|
NW
19
|
| Wind gust (mph) |
20
|
23
|
25
|
27
|
26
|
24
|
24
|
29
|
36
|
| Visibility (description) |
VG
|
E
|
E
|
E
|
E
|
E
|
E
|
E
|
E
|
| Humidity |
86%
|
85%
|
87%
|
86%
|
84%
|
78%
|
75%
|
77%
|
79%
|
| UV | - | - | - | 1 | 3 | 6 | 4 | 1 | - |
| Wind direction and speed (mph) |
10
|
11
|
12
|
13
|
14
|
15
|
14
|
15
|
19
|
| Height of waves offshore (m) |
0.4
|
0.5
|
0.8
|
0.8
|
0.8
|
0.7
|
0.5
|
0.5
|
0.7
|
| Period of waves offshore (s) |
4
|
4
|
4
|
5
|
5
|
5
|
4
|
4
|
5
|
| Direction of waves offshore |
|
|
|
|
|
|
|
|
|
Monday (7 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%
|
10%
|
10%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
| Temperature (°C) |
14°
|
13°
|
13°
|
15°
|
16°
|
17°
|
16°
|
14°
|
| Feels like temperature (°C) |
10°
|
10°
|
10°
|
11°
|
14°
|
15°
|
14°
|
12°
|
| Wind direction and speed (mph) |
NNW
21
|
NNW
20
|
NNW
17
|
NW
16
|
NW
14
|
WNW
11
|
WNW
10
|
NNW
8
|
| Wind gust (mph) |
37
|
36
|
34
|
30
|
21
|
18
|
17
|
19
|
| Visibility (description) |
E
|
VG
|
E
|
E
|
E
|
E
|
E
|
E
|
| Humidity |
81%
|
83%
|
77%
|
69%
|
62%
|
58%
|
65%
|
81%
|
| UV | - | - | 1 | 5 | 7 | 5 | 1 | - |
| Wind direction and speed (mph) |
21
|
20
|
17
|
16
|
14
|
11
|
10
|
8
|
| Height of waves offshore (m) |
1.4
|
1.9
|
1.7
|
1.5
|
1.2
|
0.8
|
0.7
|
0.6
|
| Period of waves offshore (s) |
6
|
7
|
6
|
6
|
6
|
5
|
5
|
5
|
| Direction of waves offshore |
|
|
|
|
|
|
|
|
Tuesday (8 July 2025)
| Time |
01:00
|
04:00
|
07:00
|
10:00
|
13:00
|
16:00
|
19:00
|
22:00
|
|---|---|---|---|---|---|---|---|---|
| Weather symbols | |
|
|
|
|
|
|
|
| Chance of precipitation |
10%
|
10%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
<5%
|
| Temperature (°C) |
13°
|
12°
|
13°
|
15°
|
16°
|
17°
|
16°
|
15°
|
| Feels like temperature (°C) |
11°
|
10°
|
12°
|
13°
|
14°
|
15°
|
15°
|
14°
|
| Wind direction and speed (mph) |
NNW
10
|
NW
9
|
NW
9
|
NW
9
|
WNW
9
|
WSW
8
|
SW
9
|
SSW
7
|
| Wind gust (mph) |
17
|
19
|
17
|
16
|
15
|
15
|
15
|
14
|
| Visibility (description) |
E
|
E
|
E
|
E
|
E
|
E
|
E
|
VG
|
| Humidity |
81%
|
79%
|
73%
|
67%
|
64%
|
60%
|
70%
|
86%
|
| UV | - | - | 1 | 4 | 7 | 4 | 1 | - |
| Wind direction and speed (mph) |
9
|
9
|
9
|
9
|
9
|
8
|
9
|
6
|
| Height of waves offshore (m) |
0.7
|
0.6
|
0.5
|
0.4
|
0.4
|
0.4
|
0.4
|
0.3
|
| Period of waves offshore (s) |
4
|
4
|
4
|
4
|
4
|
2
|
3
|
3
|
| Direction of waves offshore |
|
|
|
|
|
|
|
|
Wednesday (9 July 2025)
| Time |
01:00
|
04:00
|
07:00
|
10:00
|
13:00
|
16:00
|
19:00
|
22:00
|
|---|---|---|---|---|---|---|---|---|
| Weather symbols | |
|
|
|
|
 |
|
|
| Chance of precipitation |
<5%
|
10%
|
10%
|
10%
|
<5%
|
<5%
|
<5%
|
<5%
|
| Temperature (°C) |
14°
|
14°
|
15°
|
17°
|
19°
|
19°
|
19°
|
15°
|
| Feels like temperature (°C) |
13°
|
13°
|
15°
|
16°
|
17°
|
18°
|
17°
|
15°
|
| Wind direction and speed (mph) |
S
6
|
SSW
5
|
WSW
5
|
WSW
8
|
WSW
10
|
SW
10
|
SSW
10
|
S
8
|
| Wind gust (mph) |
11
|
11
|
14
|
16
|
18
|
18
|
14
|
10
|
| Visibility (description) |
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
G
|
| Humidity |
92%
|
94%
|
91%
|
83%
|
74%
|
71%
|
75%
|
92%
|
| UV | - | - | 1 | 4 | 6 | 4 | 1 | - |
| Wind direction and speed (mph) |
6
|
5
|
5
|
8
|
10
|
10
|
10
|
8
|
| Height of waves offshore (m) |
0.2
|
0.2
|
0.2
|
0.2
|
0.2
|
0.2
|
0.2
|
0.3
|
| Period of waves offshore (s) |
3
|
3
|
3
|
3
|
3
|
3
|
3
|
4
|
| Direction of waves offshore |
|
|
|
|
|
|
|
|
Thursday (10 July 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%
|
10%
|
10%
|
<5%
|
<5%
|
10%
|
10%
|
| Temperature (°C) |
15°
|
14°
|
15°
|
18°
|
20°
|
20°
|
19°
|
16°
|
| Feels like temperature (°C) |
14°
|
14°
|
15°
|
17°
|
19°
|
19°
|
18°
|
15°
|
| Wind direction and speed (mph) |
SSW
7
|
SSW
6
|
SSW
6
|
SSW
8
|
SSW
10
|
SSW
11
|
SSW
10
|
SSW
7
|
| Wind gust (mph) |
9
|
9
|
14
|
17
|
17
|
16
|
11
|
8
|
| Visibility (description) |
G
|
G
|
G
|
G
|
VG
|
VG
|
VG
|
G
|
| Humidity |
96%
|
96%
|
94%
|
84%
|
73%
|
71%
|
75%
|
93%
|
| UV | - | - | 1 | 4 | 7 | 4 | 1 | - |
| Wind direction and speed (mph) |
7
|
– | – | – | – | – | – | – |
| Height of waves offshore (m) |
0.3
|
– | – | – | – | – | – | – |
| Period of waves offshore (s) |
5
|
– | – | – | – | – | – | – |
| Direction of waves offshore |
|
–
|
–
|
–
|
–
|
–
|
–
|
–
|
Tooltip header
Tide times
Friday 4 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 4 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 4 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 4 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 5 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 5 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 5 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 5 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 6 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 6 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 6 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 6 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 7 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 7 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 7 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 7 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 8 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 8 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 8 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 8 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 9 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 9 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 9 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 9 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 10 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 10 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 10 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 10 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:
Breezy, damp and humid to start the weekend.
This Evening and Tonight:
Rain spreading across the country, turning heavy and persistent over the hills for a time. Misty and murky around coasts and higher ground, whilst a few clear spells possible in the east. Breezy and mild. Minimum temperature 13 °C.
Saturday:
Damp and grey for much of Saturday with outbreaks of rain and drizzle, mainly over the hills. Chance of some brighter breaks in the east. Breezy but feeling humid. Maximum temperature 20 °C.
Outlook for Sunday to Tuesday:
Turning fresher from Sunday. Bright and breezy to end the weekend with scattered showers, these becoming less frequent into next week with more sunny spells emerging. Winds easing by Tuesday.
Updated:
UK long range weather forecast
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