Llanddwyn Island Surf Break

Lat Long: 53.13° N 4.42° W

Llanddwyn Island 48 hour detailed Surf Forecast

Issued: 6 pm 18 Sep 2026 (local time)

Forecast update in  hr  min

Today's Llanddwyn Island sea temperature is
17.0°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 (18 Sep):

  • Afternoon surf: Afternoon surf (18 Sep, local time) - 7ft (2.2m), 7s period with SW swell.
  • Evening surf: Evening surf (18 Sep, local time) - 7.5ft (2.3m), 8s period with SW swell.

The current surf forecast for Llanddwyn Island at 11PM is: 2.3m 8s primary swell from a Southwest direction (forecast issued at 06:00pm September 18). The wind direction is predicted to be onshore.

Time (BST) & DateWave HeightWave Period
Morning (18 Sep)--
Afternoon (18 Sep)7ft (2.2m)7s
Evening (18 Sep)7.5ft (2.3m)8s

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


Short Range Forecast

Moderate rain (total 10mm), heaviest on Fri afternoon. Very mild (max 17°C on Sat afternoon, min 12°C on Sat night). Winds decreasing (strong winds from the SW on Fri afternoon, light winds from the SSW by Sun afternoon).

Fri
18
Saturday
19
Sunday
20
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
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2.4
SW
7
2.3
SW
8
2.3
SW
8
2.2
SW
8
2.4
SW
8
2.2
SW
8
1.9
WSW
7
1.6
WSW
7
1.4
SW
7
1.3
WSW
7
1.2
WSW
7
1.3
WSW
5
1.2
W
5
1.2
W
5
0.8
WNW
5
0.6
SW
6
0.5
SW
6
0.4
SW
6
0.4
SW
6
Wave Graph
Metric surfscale
Energy kJ
612
574
589
558
648
558
382
264
211
159
129
80
74
74
32
23
18
13
9
Wind (km/h)
45
SW
40
SW
35
SW
35
SW
40
SW
40
SW
35
WSW
30
WSW
25
WSW
25
W
25
W
30
W
25
WNW
25
WNW
20
WNW
15
WNW
15
W
10
SSW
15
S
Wind State
on
on
on
on
on
on
cross-on
on
on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
High Tide
2:30PM3.01m
3:16AM2.79m
3:54PM2.78m
5:10AM2.63m
5:52PM2.79m
Low Tide
9:24PM1.38m
9:52AM1.62m
10:46PM1.58m
11:27AM1.71m
mod rain
light rain
cloud
part cloud
cloud
cloud
rain showers
part cloud
cloud
part cloud
clear
clear
clear
clear
part cloud
part cloud
part cloud
part cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:56
6:58
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:27
7:23
7:22
 mm
8
1
1
Temp °C
15
16
16
16
16
16
16
16
17
16
15
14
13
12
12
13
13
13
12
Feels °C
8
10
10
11
10
10
10
10
12
11
10
8
7
7
7
9
10
11
8
  • 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 

FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Llanddwyn Island surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.


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