Llanddwyn Island surfForecast / Wales – Anglesy / UK

information circle48hr Weather and Surf, issued 12 am Tuesday 12 May 2026 BST
Forecast update in hr  min  s Forecast update imminent
Llanddwyn Island surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Llanddwyn Island sea temperature is
11.6° C
(Which is 1.4°C warmer than normal for this time of year)

How big are the waves at Llanddwyn Island today?

The current surf forecast for Llanddwyn Island at 5AM is: 0.1m 9s primary swell from a Southwest direction and 0.2m 3s secondary swell from a West direction (forecast issued at 12:00am May 12). The wind direction is predicted to be onshore.

Time (BST) & DateWave HeightWave Period
Morning (12 May)2ft (0.6m)3s
Afternoon (12 May)3.5ft (1.0m)5s
Evening (12 May)2.5ft (0.7m)4s

Table - waves today at Llanddwyn Island. (Swell directed towards the surf break)


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Moderate rain (total 12mm), heaviest on Thu morning. Very mild (max 12°C on Tue afternoon, min 7°C on Mon night). Winds increasing (calm on Mon night, strong winds from the WNW by Tue night).

Tuesday
12
Wednesday
13
Thursday
14
1 AM
4 AM
7 AM
10 AM
1 PM
4 PM
7 PM
10 PM
1 AM
4 AM
7 AM
10 AM
1 PM
4 PM
7 PM
10 PM
1 AM
4 AM
7 AM
10 AM
1 PM
4 PM
7 PM
10 PM
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Wave
Height (m)
Direction
Period (s)
0.1
SW
8
0.1
SW
8
0.1
SW
9
0.7
WNW
4
1.1
NW
4
0.9
NW
5
0.7
WNW
5
0.7
W
4
1.3
W
5
1.8
WNW
6
1.9
WNW
7
2
WNW
7
1.7
WNW
6
1.4
WNW
6
0.4
SW
7
0.4
SW
6
1.6
NW
6
1.8
NW
7
1.7
NW
7
1.6
NW
6
1.3
NW
6
1
NW
6
0.1
SW
14
0.1
SW
14
Wave Graph
Metric surfscale
Energy kJ
3
3
3
14
45
33
21
13
78
224
319
331
216
123
11
9
220
267
246
188
124
62
8
8
Wind (km/h)
5
SW
10
SW
20
W
25
WNW
30
NW
20
W
20
W
30
W
35
W
40
W
40
WNW
40
NW
40
NW
35
NW
30
NNW
35
NW
35
NNW
35
NNW
30
NNW
30
NNW
25
NNW
25
NNW
20
N
15
NNE
glassy
on
cross-on
cross-on
cross
cross-on
cross-on
cross-on
cross-on
cross-on
cross
cross
cross
cross
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
High Tide
6:16AM3.28m
7:00PM3.17m
7:03AM3.52m
7:41PM3.46m
7:48AM3.79m
8:21PM3.75m
Low Tide
00:22AM1.35m
1:04PM0.90m
1:22AM1.11m
1:55PM0.61m
2:15AM0.82m
2:43PM0.34m
part cloud
part cloud
part cloud
part cloud
clear
clear
clear
clear
clear
light rain
light rain
light rain
rain showers
rain showers
light rain
clear
light rain
cloud
light rain
light rain
light rain
rain showers
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:24
5:22
5:20
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
9:04
9:05
9:07
1
1
1
1
1
1
1
1
1
2
1
Temp °C
7
8
9
9
10
12
12
11
9
9
8
9
10
10
10
9
9
8
8
9
9
10
11
8
5
5
5
3
3
7
7
4
1
0
-1
0
1
2
3
1
1
0
1
2
3
4
6
4
Swell 1
Height (m)
Direction
Period (s)
0.1
SW
8
0.1
SW
9
0.1
SW
9
0.1
SW
8
0.1
SW
8
0.1
SW
8
0.1
SW
8
0.1
SW
8
0.1
W
17
0.1
W
17
0.5
SW
7
0.4
WSW
7
0.4
SW
7
0.4
SW
6
0.2
WSW
6
0.1
W
16
0.1
W
16
0.1
SW
15
0.1
SW
15
0.1
SW
14
0.1
SW
14
0.1
SW
14
Energy kJ
3
3
3
3
3
3
3
3
6
5
22
19
11
9
4
5
5
9
8
8
8
8
Swell 2
Height (m)
Direction
Period (s)
0.1
SW
8
0.1
W
18
0.1
W
16
0.1
W
16
0.4
WSW
5
0.2
WSW
5
0.1
W
16
0.1
W
16
0.1
W
7
Energy kJ
3
7
5
5
10
2
5
5
1
Swell 3
Height (m)
Direction
Period (s)
0.1
W
18
0.1
W
16
0.1
W
16
Energy kJ
6
5
5
Wind waves
Height (m)
Direction
Period (s)
0.3
WNW
3
0.7
WNW
4
1.1
NW
4
0.9
NW
5
0.7
WNW
5
0.7
W
4
1.3
W
5
1.8
WNW
6
1.9
WNW
7
2
WNW
7
1.7
WNW
6
1.4
WNW
6
1.1
NW
6
1.4
NW
6
1.6
NW
6
1.8
NW
7
1.7
NW
7
1.6
NW
6
1.3
NW
6
1
NW
6
0.9
NW
5
0.7
NW
5
Energy kJ
1
14
45
33
21
13
78
224
319
331
216
123
77
124
220
267
246
188
124
62
38
29
Nearest Offshore or Glassy
Rating
(10 max)
1
1
1
1
1
1
1
1
1
1
1
4
1
4
2
1
1
2
3
1
1
1
1
1
Distance (km)
222
213
213
290
314
285
285
285
278
290
294
597
1345
641
612
608
328
608
597
359
356
255
286
175
Best forecast wave conditions in Anglesy
Rating
(10 max)
Best forecast wave conditions in United Kingdom
Rating
(10 max)
2
2
2
1
1
1
3
4
4
4
1
4
4
4
2
2
3
1
1
1
1
1
Header Global
Rating
(10 max)
9
9
5
8
8
9
9
9
9
6
9
9
7
7
6
9
8
9
5
5
5
5
5
5
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder

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