Porth 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: 20° Celsius; Minimum nighttime temperature: 14° Celsius;
Maximum daytime temperature: 20° Celsius; Minimum nighttime temperature: 14° Celsius; -
Maximum daytime temperature: 19° Celsius; Minimum nighttime temperature: 12° Celsius;
Maximum daytime temperature: 19° Celsius; Minimum nighttime temperature: 12° 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: 13° Celsius;
Maximum daytime temperature: 18° Celsius; Minimum nighttime temperature: 13° Celsius; -
Maximum daytime temperature: 18° Celsius; Minimum nighttime temperature: 13° Celsius;
Maximum daytime temperature: 18° Celsius; Minimum nighttime temperature: 13° Celsius;
-
Maximum daytime temperature: 18° Celsius; Minimum nighttime temperature: 14° Celsius;
Maximum daytime temperature: 18° Celsius; Minimum nighttime temperature: 14° Celsius;
-
Maximum daytime temperature: 19° Celsius; Minimum nighttime temperature: 13° Celsius;
Maximum daytime temperature: 19° Celsius; Minimum nighttime temperature: 13° Celsius;
- • unsafe for novice surfers
- • paddle boarding/kayaking not recommended at any level
Tide: Next high tide (4.4m) at
Sunrise:
Sunset:
7 day forecast for Porth Tywyn Mawr (Sandy Beach)
| Time |
15:00
|
16:00
|
17:00
|
18:00
|
19:00
|
20:00
|
21:00
|
22:00
|
23:00
|
|---|---|---|---|---|---|---|---|---|---|
| Weather symbols |  |
|
|
 |
 |
 |
|
|
|
| Chance of precipitation |
20%
|
30%
|
50%
|
70%
|
90%
|
90%
|
90%
|
80%
|
90%
|
| Temperature |
18°
|
18°
|
18°
|
17°
|
16°
|
16°
|
16°
|
15°
|
15°
|
| Feels like temperature (°C) |
12°
|
12°
|
12°
|
12°
|
11°
|
11°
|
11°
|
11°
|
12°
|
| Wind direction and speed |
SSW
28
|
SSW
28
|
SSW
27
|
S
27
|
S
26
|
S
25
|
S
23
|
S
22
|
S
21
|
| Wind gust (mph) |
47
|
47
|
46
|
46
|
45
|
44
|
43
|
41
|
41
|
| Visibility |
E
|
E
|
E
|
E
|
E
|
E
|
E
|
E
|
E
|
| Humidity |
65%
|
66%
|
67%
|
71%
|
76%
|
84%
|
84%
|
84%
|
85%
|
| UV | 4 | 3 | 2 | 1 | 1 | 1 | - | - | - |
| Wind direction and speed |
27
|
28
|
27
|
27
|
26
|
25
|
23
|
22
|
21
|
| Height of waves offshore (m) |
1.2
|
1.1
|
1.1
|
1.0
|
0.9
|
0.8
|
0.8
|
0.8
|
0.7
|
| Period of waves offshore (s) |
8
|
8
|
8
|
8
|
9
|
9
|
9
|
9
|
9
|
| Direction of waves offshore |
|
|
|
|
|
|
|
|
|
| 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 |
70%
|
60%
|
50%
|
50%
|
40%
|
40%
|
40%
|
20%
|
10%
|
10%
|
10%
|
10%
|
10%
|
10%
|
30%
|
40%
|
50%
|
60%
|
60%
|
60%
|
40%
|
20%
|
10%
|
10%
|
| Temperature (°C) |
15°
|
15°
|
15°
|
15°
|
15°
|
15°
|
15°
|
15°
|
15°
|
16°
|
16°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
17°
|
16°
|
16°
|
15°
|
15°
|
15°
|
15°
|
| Feels like temperature (°C) |
12°
|
12°
|
12°
|
12°
|
12°
|
13°
|
13°
|
13°
|
13°
|
13°
|
13°
|
14°
|
14°
|
14°
|
14°
|
14°
|
14°
|
14°
|
14°
|
14°
|
13°
|
13°
|
13°
|
13°
|
| Wind direction and speed (mph) |
S
20
|
SSW
18
|
SSW
17
|
SSW
17
|
SSW
16
|
SSW
15
|
SSW
14
|
SW
14
|
SW
14
|
SW
14
|
SW
15
|
SW
16
|
SW
17
|
SW
18
|
SW
18
|
SW
18
|
SW
17
|
SW
16
|
WSW
15
|
SW
14
|
WSW
13
|
SW
12
|
SW
11
|
WSW
11
|
| Wind gust (mph) |
39
|
37
|
35
|
34
|
32
|
30
|
29
|
27
|
28
|
28
|
30
|
30
|
32
|
32
|
33
|
33
|
32
|
31
|
29
|
29
|
27
|
27
|
26
|
26
|
| Visibility (description) |
E
|
E
|
E
|
E
|
E
|
E
|
E
|
E
|
E
|
E
|
E
|
E
|
VG
|
VG
|
VG
|
VG
|
E
|
E
|
VG
|
E
|
VG
|
VG
|
VG
|
VG
|
| Humidity |
85%
|
86%
|
86%
|
85%
|
85%
|
86%
|
86%
|
86%
|
84%
|
81%
|
77%
|
75%
|
75%
|
75%
|
74%
|
75%
|
75%
|
77%
|
79%
|
78%
|
83%
|
83%
|
82%
|
81%
|
| UV | - | - | - | - | - | - | 1 | 1 | 1 | 2 | 2 | 4 | 5 | 5 | 5 | 4 | 2 | 2 | 1 | 1 | 1 | - | - | - |
| Wind direction and speed (mph) |
19
|
18
|
17
|
17
|
16
|
15
|
14
|
14
|
14
|
14
|
15
|
16
|
17
|
18
|
18
|
18
|
17
|
16
|
15
|
14
|
13
|
12
|
11
|
11
|
| Height of waves offshore (m) |
0.8
|
0.8
|
0.9
|
0.9
|
0.8
|
0.7
|
0.7
|
0.7
|
0.7
|
0.7
|
0.7
|
0.7
|
0.7
|
0.8
|
0.8
|
0.8
|
0.8
|
0.8
|
0.8
|
0.8
|
0.7
|
0.7
|
0.7
|
0.7
|
| Period of waves offshore (s) |
9
|
9
|
8
|
8
|
8
|
9
|
9
|
10
|
4
|
4
|
4
|
4
|
4
|
4
|
4
|
4
|
10
|
10
|
4
|
4
|
4
|
4
|
4
|
4
|
| Direction of waves offshore |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 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%
|
20%
|
60%
|
70%
|
80%
|
70%
|
40%
|
20%
|
20%
|
| Temperature (°C) |
15°
|
14°
|
14°
|
13°
|
15°
|
16°
|
17°
|
16°
|
14°
|
| Feels like temperature (°C) |
13°
|
13°
|
12°
|
12°
|
14°
|
15°
|
16°
|
15°
|
13°
|
| Wind direction and speed (mph) |
WSW
11
|
WSW
10
|
SW
8
|
S
6
|
SSE
10
|
S
10
|
SW
9
|
WNW
8
|
SW
7
|
| Wind gust (mph) |
25
|
23
|
19
|
17
|
16
|
12
|
10
|
11
|
13
|
| Visibility (description) |
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
| Humidity |
79%
|
78%
|
81%
|
86%
|
82%
|
83%
|
79%
|
83%
|
92%
|
| UV | - | - | - | 1 | 2 | 4 | 3 | 1 | - |
| Wind direction and speed (mph) |
11
|
10
|
8
|
6
|
10
|
10
|
9
|
8
|
7
|
| Height of waves offshore (m) |
0.7
|
0.6
|
0.6
|
0.5
|
0.3
|
0.2
|
0.2
|
0.2
|
0.2
|
| Period of waves offshore (s) |
4
|
4
|
4
|
4
|
4
|
3
|
9
|
9
|
8
|
| Direction of waves offshore |
|
|
|
|
|
|
|
|
|
| Time |
01:00
|
04:00
|
07:00
|
10:00
|
13:00
|
16:00
|
19:00
|
22:00
|
|---|---|---|---|---|---|---|---|---|
| Weather symbols | |
|
 |
|
|
|
|
|
| Chance of precipitation |
20%
|
40%
|
40%
|
50%
|
50%
|
60%
|
50%
|
30%
|
| Temperature (°C) |
14°
|
14°
|
13°
|
16°
|
16°
|
17°
|
16°
|
15°
|
| Feels like temperature (°C) |
13°
|
13°
|
12°
|
14°
|
14°
|
15°
|
14°
|
13°
|
| Wind direction and speed (mph) |
SW
7
|
WSW
7
|
SSW
8
|
SSW
11
|
SSW
13
|
SW
12
|
SW
13
|
WSW
12
|
| Wind gust (mph) |
14
|
13
|
13
|
16
|
19
|
21
|
23
|
25
|
| Visibility (description) |
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
| Humidity |
90%
|
91%
|
92%
|
83%
|
77%
|
77%
|
84%
|
86%
|
| UV | - | - | 1 | 2 | 4 | 2 | 1 | - |
| Wind direction and speed (mph) |
7
|
7
|
8
|
11
|
13
|
12
|
13
|
12
|
| Height of waves offshore (m) |
0.3
|
0.2
|
0.3
|
0.3
|
0.4
|
0.3
|
0.4
|
1.0
|
| Period of waves offshore (s) |
8
|
8
|
9
|
9
|
7
|
9
|
7
|
4
|
| Direction of waves offshore |
|
|
|
|
|
|
|
|
| Time |
01:00
|
04:00
|
07:00
|
10:00
|
13:00
|
16:00
|
19:00
|
22:00
|
|---|---|---|---|---|---|---|---|---|
| Weather symbols | |
|
|
|
|
|
|
|
| Chance of precipitation |
30%
|
30%
|
20%
|
20%
|
30%
|
30%
|
30%
|
20%
|
| Temperature (°C) |
14°
|
14°
|
14°
|
16°
|
16°
|
17°
|
16°
|
15°
|
| Feels like temperature (°C) |
13°
|
12°
|
11°
|
12°
|
13°
|
14°
|
13°
|
12°
|
| Wind direction and speed (mph) |
WSW
11
|
WSW
13
|
W
14
|
W
17
|
WSW
18
|
SW
17
|
WSW
15
|
WSW
14
|
| Wind gust (mph) |
25
|
24
|
24
|
26
|
26
|
27
|
24
|
23
|
| Visibility (description) |
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
| Humidity |
83%
|
85%
|
85%
|
76%
|
70%
|
68%
|
76%
|
79%
|
| UV | - | - | 1 | 2 | 5 | 2 | 1 | - |
| Wind direction and speed (mph) |
11
|
13
|
14
|
17
|
18
|
17
|
15
|
14
|
| Height of waves offshore (m) |
1.4
|
1.3
|
1.6
|
1.7
|
1.9
|
1.6
|
1.6
|
1.8
|
| Period of waves offshore (s) |
5
|
5
|
6
|
6
|
7
|
6
|
6
|
6
|
| Direction of waves offshore |
|
|
|
|
|
|
|
|
| Time |
01:00
|
04:00
|
07:00
|
10:00
|
13:00
|
16:00
|
19:00
|
22:00
|
|---|---|---|---|---|---|---|---|---|
| Weather symbols | |
|
|
|
|
|
|
|
| Chance of precipitation |
20%
|
20%
|
20%
|
20%
|
20%
|
30%
|
20%
|
30%
|
| Temperature (°C) |
14°
|
14°
|
13°
|
16°
|
17°
|
17°
|
16°
|
15°
|
| Feels like temperature (°C) |
12°
|
11°
|
11°
|
13°
|
13°
|
14°
|
13°
|
13°
|
| Wind direction and speed (mph) |
WSW
13
|
WSW
13
|
SW
14
|
SW
17
|
SW
19
|
SSW
18
|
SSW
16
|
SSW
12
|
| Wind gust (mph) |
23
|
21
|
29
|
32
|
32
|
31
|
25
|
19
|
| Visibility (description) |
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
VG
|
G
|
| Humidity |
80%
|
84%
|
85%
|
76%
|
70%
|
71%
|
80%
|
88%
|
| UV | - | - | 1 | 3 | 4 | 2 | 1 | - |
| Wind direction and speed (mph) |
13
|
13
|
14
|
17
|
19
|
18
|
16
|
12
|
| Height of waves offshore (m) |
1.8
|
1.7
|
1.6
|
1.4
|
– | – | – | – |
| Period of waves offshore (s) |
6
|
6
|
6
|
6
|
– | – | – | – |
| Direction of waves offshore |
|
|
|
|
|
|
|
|
| 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%
|
50%
|
50%
|
40%
|
40%
|
40%
|
| Temperature (°C) |
15°
|
15°
|
15°
|
17°
|
17°
|
17°
|
17°
|
16°
|
| Feels like temperature (°C) |
13°
|
13°
|
12°
|
14°
|
14°
|
14°
|
14°
|
14°
|
| Wind direction and speed (mph) |
SSW
12
|
SSW
13
|
SSW
14
|
SSW
18
|
SSW
20
|
SSW
18
|
SSW
16
|
SSW
12
|
| Wind gust (mph) |
18
|
17
|
25
|
29
|
26
|
23
|
18
|
17
|
| Visibility (description) |
G
|
G
|
G
|
G
|
G
|
G
|
G
|
G
|
| Humidity |
90%
|
91%
|
92%
|
85%
|
83%
|
82%
|
89%
|
91%
|
| UV | - | - | 1 | 2 | 3 | 2 | 1 | - |
| Wind direction and speed (mph) |
12
|
– | – | – | – | – | – | – |
| Height of waves offshore (m) |
1.0
|
– | – | – | – | – | – | – |
| Period of waves offshore (s) |
5
|
– | – | – | – | – | – | – |
| Direction of waves offshore |
|
–
|
–
|
–
|
–
|
–
|
–
|
–
|
Tooltip header
Tide times
Sunday 31 August
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 31 August
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 31 August
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 31 August
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 1 September
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 1 September
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 1 September
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 1 September
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 2 September
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 2 September
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 2 September
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 2 September
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 3 September
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 3 September
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 3 September
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 3 September
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 4 September
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 4 September
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 4 September
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 4 September
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 5 September
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 5 September
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 5 September
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 5 September
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 6 September
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 6 September
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 6 September
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 6 September
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.
UK video forecast
Porth Tywyn Mawr (Sandy Beach) weather map
View the weather with our interactive map
Wales weather forecast
Headline:
Blustery today with a mix of sunshine and showers.
Today:
A day of sunshine and showers today, with the most frequent and heaviest showers likely across the west. Winds will also be strong with gales possible near northwestern coasts. Temperatures around average but feeling cool during showers. Maximum temperature 20 °C.
Tonight:
Showers fading for a time this evening, especially in the east, but a band of more persistent rain will gradually move across Wales overnight. Winds easing a little. Minimum temperature 13 °C.
Monday:
A wet start to Monday with rain giving way to a mix of sunshine and showers. The showers potentially turning heavy and thundery at times. Staying breezy, especially near coasts. Maximum temperature 20 °C.
Outlook for Tuesday to Thursday:
Remaining unsettled throughout with further spells of rain and showers. The rain will be heavy at times, but some drier and sunnier interludes will develop. Temperatures around average.
Updated: