Llanddwyn Island Surf Break

Lat Long: 53.13° N 4.42° W

Llanddwyn Island 48 hour detailed Surf Forecast

Issued: 12 pm 17 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 (17 Sep):

  • Morning surf: Morning surf (17 Sep, local time) - 5ft (1.5m), 6s period with W swell.
  • Afternoon surf: Afternoon surf (17 Sep, local time) - 5ft (1.5m), 6s period with W swell.
  • Evening surf: Evening surf (17 Sep, local time) - 5ft (1.5m), 6s period with W swell.

The current surf forecast for Llanddwyn Island at 9PM is: 1.5m 6s primary swell from a West direction (forecast issued at 12:00pm September 17). The wind direction is predicted to be cross-onshore.

Time (BST) & DateWave HeightWave Period
Morning (17 Sep)5ft (1.5m)6s
Afternoon (17 Sep)5ft (1.5m)6s
Evening (17 Sep)5ft (1.5m)6s

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


Short Range Forecast

Moderate rain (total 13mm), heaviest on Fri afternoon. Very mild (max 17°C on Fri night, min 13°C on Thu night). Winds decreasing (strong winds from the SW on Fri afternoon, moderate winds from the W by Sat night).

Thu
17
Friday
18
Saturday
19
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)
1.5
W
6
1.5
W
6
1.5
W
6
1.5
W
6
1.5
W
6
1.4
W
6
1.2
W
5
1.1
WSW
5
1.1
SW
5
1.7
SW
6
2.3
SW
7
2.2
SW
7
2.1
SW
7
2.1
SW
7
2.2
SW
7
2.2
SW
8
1.7
WSW
7
1.5
WSW
7
1.3
WSW
7
1.2
WSW
7
1.1
WSW
4
Wave Graph
Metric surfscale
Energy kJ
149
136
141
141
138
121
83
59
55
185
527
529
444
479
529
544
297
222
173
131
42
Wind (km/h)
30
W
30
W
30
W
30
W
30
W
30
W
25
W
20
WSW
30
SW
45
SSW
45
SW
40
SW
35
SW
35
SW
35
SW
30
SW
30
WSW
30
WSW
25
WSW
25
W
25
W
Wind State
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
on
on
on
on
on
on
on
on
on
cross-on
cross-on
cross-on
cross-on
cross-on
High Tide
1:40PM3.31m
2:09AM3.11m
2:30PM3.01m
3:16AM2.79m
3:54PM2.78m
Low Tide
8:09AM1.03m
8:30PM1.08m
8:52AM1.36m
9:24PM1.38m
9:52AM1.62m
clear
cloud
part cloud
clear
clear
clear
part cloud
part cloud
cloud
cloud
mod rain
light rain
light rain
cloud
cloud
cloud
light rain
clear
part cloud
cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:52
6:54
6:56
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:29
7:27
7:23
 mm
7
4
1
1
Temp °C
14
15
15
15
14
13
13
13
14
15
14
16
16
16
16
17
16
16
17
16
15
Feels °C
8
8
9
9
8
7
8
9
8
7
6
10
11
11
11
13
11
10
12
11
10
  • 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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