Llanddwyn Island Surf Break

Lat Long: 53.13° N 4.42° W

Llanddwyn Island 48 hour detailed Surf Forecast

Issued: 12 pm 11 Sep 2026 (local time)

Forecast update in  hr  min

Today's Llanddwyn Island sea temperature is
17.2°C
1.8° 

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 (11 Sep):

  • Morning surf: Morning surf (11 Sep, local time) - 2.5ft (0.7m), 6s period with SW swell.
  • Afternoon surf: Afternoon surf (11 Sep, local time) - 1.5ft (0.5m), 6s period with SW swell.
  • Evening surf: Evening surf (11 Sep, local time) - 1.5ft (0.4m), 6s period with SW swell.

The current surf forecast for Llanddwyn Island at 8PM is: 0.4m 6s primary swell from a Southwest direction and 0.3m 4s secondary swell from a Northwest direction (forecast issued at 12:00pm September 11). The wind direction is predicted to be cross-onshore.

Time (BST) & DateWave HeightWave Period
Morning (11 Sep)2.5ft (0.7m)6s
Afternoon (11 Sep)1.5ft (0.5m)6s
Evening (11 Sep)1.5ft (0.4m)6s

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


Short Range Forecast

Light rain (total 8mm), mostly falling on Sat morning. Very mild (max 17°C on Sat afternoon, min 13°C on Fri night). Mainly fresh winds.

Fri
11
Saturday
12
Sunday
13
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
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.6
SW
6
0.6
SW
7
0.5
SW
6
0.4
SW
6
0.4
SW
6
0.6
SW
3
1.2
SW
5
1.6
SW
6
1.8
SW
6
1.8
SW
7
1.8
SW
7
1.6
SW
7
1.3
SW
7
1.1
SW
7
0.9
SW
7
0.8
SW
7
0.6
SW
6
0.5
SW
6
0.4
SW
6
0.4
SW
6
0.4
SW
6
Wave Graph
Metric surfscale
Energy kJ
34
27
20
14
14
9
70
155
244
289
299
215
144
97
73
52
33
19
13
13
13
Wind (km/h)
15
NW
15
NW
10
NW
5
SW
15
S
20
SSW
35
SSW
35
SSW
35
SSW
35
SW
25
SW
20
SW
15
SSW
10
SSW
10
WNW
5
NW
10
N
5
WNW
10
SW
10
S
15
S
Wind State
cross
cross
cross
glassy
cross-on
cross-on
cross-on
cross-on
on
on
on
on
on
on
cross-on
cross
cross-off
glassy
on
cross-on
cross-on
High Tide
10:06AM4.03m
10:17PM4.51m
10:42AM4.11m
10:54PM4.52m
11:16AM4.11m
Low Tide
4:43PM-0.03m
5:10AM-0.34m
5:22PM-0.06m
5:48AM-0.24m
5:59PM0.01m
part cloud
clear
clear
clear
clear
clear
part cloud
light rain
light rain
light rain
part cloud
part cloud
rain showers
light rain
light rain
part cloud
cloud
cloud
clear
cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:43
6:45
6:46
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:44
7:40
7:38
 mm
1
3
1
1
1
1
Temp °C
14
15
15
15
14
13
14
15
16
16
17
17
17
17
16
15
15
16
16
16
16
Feels °C
11
12
12
14
12
9
8
9
11
12
15
15
16
17
15
15
15
16
15
15
14
  • 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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