Llanddwyn Island Surf Break

Lat Long: 53.13° N 4.42° W

Llanddwyn Island 48 hour detailed Surf Forecast

Issued: 12 am 18 Sep 2026 (local time)

Forecast update in  hr  min

Today's Llanddwyn Island sea temperature is
17.3°C
2.1° 

Llanddwyn Island surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


How big are the waves at Llanddwyn Island today (18 Sep):

  • Morning surf: Morning surf (18 Sep, local time) - 3.5ft (1.1m), 5s period with SW swell.
  • Afternoon surf: Afternoon surf (18 Sep, local time) - 7ft (2.1m), 7s period with SW swell.
  • Evening surf: Evening surf (18 Sep, local time) - 7ft (2.1m), 7s period with SW swell.

The current surf forecast for Llanddwyn Island at 9AM is: 1.1m 5s primary swell from a Southwest direction and 0.4m 5s secondary swell from a Northwest direction (forecast issued at 12:00am September 18). The wind direction is predicted to be onshore.

Time (BST) & DateWave HeightWave Period
Morning (18 Sep)3.5ft (1.1m)5s
Afternoon (18 Sep)7ft (2.1m)7s
Evening (18 Sep)7ft (2.1m)7s

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


Short Range Forecast

Light rain (total 9mm), mostly falling on Fri afternoon. Very mild (max 17°C on Sat afternoon, min 12°C on Sun morning). Winds decreasing (strong winds from the SW on Fri afternoon, light winds from the WSW by Sun afternoon).

Friday
18
Saturday
19
Sunday
20
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 Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.4
W
6
1.3
W
5
1.1
W
5
1.1
SW
5
1.6
SW
6
2.4
SW
7
2.3
SW
7
2.1
SW
7
2.1
SW
7
2.2
SW
7
2.1
SW
7
1.7
WSW
7
1.4
WSW
7
1.2
WSW
7
1.1
SW
7
1
WSW
4
1.1
W
4
1.2
W
5
0.9
WNW
5
0.6
SW
6
0.5
SW
6
0.5
SW
6
0.4
SW
6
0.4
SW
6
Wave Graph
Metric surfscale
Energy kJ
117
99
66
57
157
579
558
492
492
529
465
289
196
138
116
40
50
66
38
30
18
18
12
11
Wind (km/h)
30
W
25
W
25
WSW
30
SW
40
SSW
45
SW
40
SW
35
SW
35
SW
40
SW
35
SW
30
WSW
30
WSW
25
W
25
W
25
W
25
W
25
W
20
WNW
20
WNW
10
W
5
WSW
15
SSW
15
S
Wind State
cross-on
cross-on
on
on
on
on
on
on
on
on
on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross
cross-on
cross-on
cross-on
cross-on
High Tide
2:09AM3.11m
2:30PM3.01m
3:16AM2.79m
3:54PM2.78m
5:10AM2.63m
5:52PM2.79m
Low Tide
8:52AM1.36m
9:24PM1.38m
9:52AM1.62m
10:46PM1.58m
11:27AM1.71m
part cloud
cloud
cloud
cloud
cloud
mod rain
light rain
cloud
cloud
cloud
cloud
rain showers
part cloud
cloud
part cloud
clear
clear
clear
clear
part cloud
part cloud
cloud
part cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:54
6:56
6:58
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:27
7:23
7:22
 mm
6
2
1
Temp °C
14
14
13
14
15
14
16
16
16
16
16
16
16
16
17
15
14
13
13
12
12
13
13
13
Feels °C
8
8
9
9
8
6
10
11
11
10
11
11
11
11
13
10
9
8
9
8
9
11
10
9
  • 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
How to use the Wavefinder 

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