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Llanddwyn Island surfForecast / Wales – Anglesy / UK

information circle12 Day Weather and Surf, issued 11 am Monday 08 Dec 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
10.5° C
(Which is normal for this time of year)


Best Forecast Surf Conditions for Llanddwyn Island this week:

The most powerful waves expected at Llanddwyn Island in the next 12 days are 3.5m 12s and forecast to arrive on Tuesday (Dec 09) at 3PM. Winds are predicted to be onshore at the time the swell arrives.

Wave TypeTime (GMT) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 3PM (Tue 9th Dec)11ft (3.5m) 12s

Table - best surf conditions forecast for Llanddwyn Island over the next 12 days.

Updates in  hr  min  s Forecast update imminent

Short Range Forecast Heavy rain (total 33mm), heaviest during Mon night. Very mild (max 14°C on Tue morning, min 9°C on Wed night). Winds increasing (light winds from the SSE on Mon night, near gales from the S by Tue morning).

Days 3-6 Weather Summary Heavy rain (total 25mm), heaviest during Sat night. Very mild (max 12°C on Sat night, min 8°C on Thu morning). Winds increasing (light winds from the WSW on Thu night, strong winds from the SW by Sat night).

Monday
08
Tuesday
09
Wednesday
10
Thursday
11
Friday
12
Saturday
13
Sunday
14
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
0
0
1
0
0
0
0
0
0
0
0
0
2
0
0
0
0
0
0
0
0
Swell
Height Map
Wave Height (m) & direction (?)
2.3
SW
1.7
SW
1.3
SW
3.5
SW
3.5
SW
2.5
SW
2.2
SW
2
WSW
1.9
SW
2
SSW
1.8
SW
1.6
SW
1.6
SW
0.9
WSW
1.7
SSW
1.8
SW
1.7
WSW
2.5
SW
3
SW
2
SW
1.4
WSW
Period(s) (?)811101012131212778912127868101010
Wave
Graph
(?)Metric surfscale
Energy kJ (?)686651344230735852419134410803123944233796332433024572027311801800373
Wind
(km/h)
30
SW
30
SSW
20
SE
50
S
50
SW
40
SSW
30
SW
30
SW
30
SSW
30
S
30
SSE
35
SSE
10
SSW
20
S
30
S
35
SSW
25
SSW
45
SW
35
SSW
30
SSW
25
W
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
ononcrosscross-
on
ononononcross-
on
cross-
on
cross-
on
crossoncross-
on
cross-
on
onononcross-
on
cross-
on
cross-
on
High Tide
/ height (m)
11:10AM
4.23
11:46PM
3.69
12:02PM
4.06
12:44AM
3.41
12:59PM
3.83
1:48AM
3.17
2:03PM
3.61
3:01AM
3.02
3:12PM
3.42
4:12AM
2.99
4:20PM
3.30
5:13AM
3.04
5:21PM
3.26
Low Tide
/ height (m)
6:17PM
-0.01
6:32AM
0.49
7:10PM
0.22
7:23AM
0.74
8:05PM
0.48
8:17AM
0.99
9:04PM
0.72
9:18AM
1.19
10:08PM
0.90
10:26AM
1.30
11:13PM
0.99
11:37AM
1.29
12:14AM
1.00
Monday
08
Tuesday
09
Wednesday
10
Thursday
11
Friday
12
Saturday
13
Sunday
14
Sunrise8:17--8:18--8:18--8:19--8:21--8:22--8:22--
Sunset-4:00--4:00--4:00--4:00--4:00--4:00--4:00-
part cloud
light rain
heavy rain
mod rain
rain showers
rain showers
clear
part cloud
part cloud
part cloud
part cloud
rain showers
rain showers
part cloud
rain showers
rain showers
light rain
heavy rain
light rain
heavy rain
rain showers
Rain (mm)
-218913-----11-3451131312
Temp. °C1212131412111010101010119999912121212
Feels °C (?)764523344334642134668
  • 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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Information about the Llanddwyn Island Surf forecast

The above surf forecast table for Llanddwyn Island provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Llanddwyn Island can be found by selecting the local surf guide option on the grey menu. Our Llanddwyn Island surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Llanddwyn Island) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).

Further information to help with frequently asked questions about our surf forecast for Llanddwyn Island may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.

Are you planning a holiday in Anglesy? If you are looking for accommodation near Llanddwyn Island, camping, hotels and holiday cottages in Anglesy, consider staying in Anglesey which is 15 km (9 miles) away. Other places in and around Anglesy where you can find information about places to rent, and car hire include Holyhead which is 25 km (16 miles) away, Bangor, Porthmadog and Llandudno.

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