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Surf Forecasts:

Llanddwyn Island surfForecast / Wales – Anglesy / UK

information circle48hr Weather and Surf, issued 11 pm Thursday 20 Nov 2025 GMT
Forecast update in hr  min  s Forecast update imminent
Llanddwyn Island surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Llanddwyn Island sea temperature is
12.4° C
 (Which is slightly warmer than usual)

How big are the waves at Llanddwyn Island today?

The current surf forecast for Llanddwyn Island at 4AM is: 0.2m 4s primary swell from a West-northwest direction (forecast issued at 11:00pm November 20). An open ocean swell of 0.3m 5s is not directed at the surf break. The wind direction is predicted to be cross-offshore.

Time (GMT) & DateWave HeightWave Period
Morning (21 Nov)0.5ft (0.2m)4s
Afternoon (21 Nov)1.5ft (0.5m)3s
Evening (21 Nov)4.5ft (1.3m)5s

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

Updates in  hr  min  s Forecast update imminent 
12 DaysHourly
Print Table
Friday
21
Saturday
22
Sunday
23
9 PM0 AM3 AM6 AM9 AM12 PM3 PM6 PM9 PM0 AM3 AM6 AM9 AM12 PM3 PM6 PM9 PM0 AM3 AM6 AM9 AM12 PM3 PM6 PM
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
0.1
W
0.6
NW
0.1
W
0.2
WNW
0.2
WNW
0.1
W
0.5
WSW
0.9
SW
1.3
SW
1.8
SW
2.1
SW
1.6
SW
1.1
SW
0.8
SW
0.7
SW
0.7
SW
0.9
SW
1.7
SSW
2.2
SW
2.3
WSW
3
WSW
3.5
WSW
3
W
1.6
WSW
Period(s) (?)12612441534567777774677810910
Wave
Graph
(?)Metric surfscale
Energy kJ (?)32531145288521438123310263444422171529565103020461603470
Wind
(km/h)
20
NNE
10
NNE
10
NNE
5
NNE
5
SSE
10
SSW
25
SW
30
SSW
35
SSW
40
SSW
40
SSW
20
NW
15
NW
15
W
15
SSW
15
SSW
20
S
35
SSW
40
SSW
40
W
40
WSW
40
WSW
50
WSW
55
WSW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off		offcross-
off		glassglassononononcross-
on		cross-
on		cross-
off		crosscross-
on		ononcross-
on		cross-
on		oncross-
on		cross-
on		ononon
High Tide
/ height (m)
9:15PM
3.77
9:30AM
3.86
9:49PM
3.71
10:02AM
3.82
10:23PM
3.59
10:36AM
3.74
Low Tide
/ height (m)
3:59AM
0.52
4:19PM
0.43
4:33AM
0.59
4:55PM
0.49
5:08AM
0.69
5:33PM
0.61
Friday
21
Saturday
22
Sunday
23
Sunrise----7:50-------7:52-------7:54---
Sunset------4:14-------4:13-------4:12-
clear
clear
clear
clear
part cloud
cloud
cloud
cloud
cloud
light rain
mod rain
rain showers
clear
clear
cloud
cloud
cloud
light rain
rain showers
light rain
cloud
part cloud
cloud
light rain
Rain (mm)
---------374-----351---1
Temp. °C666667879791099999101199898
Feels °C (?)0233332-11-206555553300-2-2-4
  • 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

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View detailed surf forecast for Llanddwyn Island at:
surf-forecast.com

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