Llanddwyn Island Surf Break

Lat Long: 53.13° N 4.42° W

Llanddwyn Island 48 hour detailed Surf Forecast

Issued: 6 am 17 Aug 2026 (local time)

Forecast update in  hr  min

Today's Llanddwyn Island sea temperature is
18.9° C
3.1° 

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 Aug):

  • Morning surf: Morning surf (17 Aug, local time) - 1.5ft (0.4m), 5s period with SW swell.
  • Afternoon surf: Afternoon surf (17 Aug, local time) - 1.5ft (0.4m), 5s period with SW swell.
  • Evening surf: Evening surf (17 Aug, local time) - 2ft (0.6m), 4s period with SW swell.

The current surf forecast for Llanddwyn Island at 1PM is: 0.4m 5s primary swell from a Southwest direction and 0.2m 3s secondary swell from a West-northwest direction (forecast issued at 06:00am August 17). The wind direction is predicted to be onshore.

Time (BST) & DateWave HeightWave Period
Morning (17 Aug)1.5ft (0.4m)5s
Afternoon (17 Aug)1.5ft (0.4m)5s
Evening (17 Aug)2ft (0.6m)4s

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


Short Range Forecast

Light rain (total 9mm), mostly falling on Mon night. Very mild (max 18°C on Tue afternoon, min 13°C on Tue night). Winds increasing (light winds from the WSW on Mon morning, fresh winds from the SW by Wed morning).

Monday
17
Tuesday
18
Wednesday
19
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
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)
0.4
SW
4
0.5
SW
4
0.4
SW
5
0.4
SW
5
0.4
SW
5
0.3
SW
5
0.6
SW
4
0.9
SW
5
0.8
WSW
5
0.7
SW
5
0.9
WSW
4
0.8
WSW
4
0.6
SW
6
0.5
SW
6
0.5
SW
5
0.8
WSW
4
1
WSW
4
1.2
WSW
5
1.2
WSW
5
1.2
WSW
5
1.4
SW
6
1.4
SW
6
1.2
SW
6
Wave Graph
Metric surfscale
Energy kJ
5
10
8
9
7
4
10
38
29
22
29
26
27
15
14
17
43
64
74
75
120
135
109
Wind (km/h)
10
W
10
WNW
10
W
5
WSW
10
W
15
S
25
SSW
20
WSW
20
W
20
WNW
20
W
20
W
15
SW
10
WSW
15
WSW
25
W
25
WSW
25
WSW
30
WSW
30
SW
25
SW
15
SW
20
W
Wind State
cross-on
cross
cross-on
on
cross-on
cross-on
cross-on
on
cross-on
cross
cross-on
cross-on
on
on
on
cross-on
cross-on
on
on
on
on
on
cross-on
High Tide
1:04PM3.73m
1:21AM3.95m
1:44PM3.51m
2:05AM3.58m
2:29PM3.25m
Low Tide
7:34AM0.15m
7:45PM0.46m
8:13AM0.53m
8:25PM0.77m
8:54AM0.92m
9:10PM1.10m
cloud
part cloud
part cloud
cloud
cloud
part cloud
cloud
light rain
part cloud
cloud
cloud
cloud
cloud
clear
clear
clear
clear
cloud
part cloud
cloud
light rain
rain showers
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:00
6:01
6:03
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:40
8:38
8:37
 mm
3
2
1
1
Temp °C
17
16
16
16
16
17
16
17
17
16
16
16
17
18
17
15
14
13
14
16
15
16
15
Feels °C
18
16
16
17
15
15
12
16
15
13
13
12
14
16
15
10
9
8
9
11
11
13
12
  • 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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