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Surf Forecasts:

Llanddwyn Island surfForecast / Wales – Anglesy / UK

information circle12 Day Weather and Surf, issued 11 am Thursday 15 Jan 2026 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
7.8° C
 (Which is slightly cooler than normal)

Best Forecast Surf Conditions for Llanddwyn Island this week:

The surf forecast for Llanddwyn Island over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Jan 15) at 6PM. The primary swell is predicted to be 0.8m and 9s period with a secondary swell of 0.3m and 18s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Llanddwyn Island in the next 12 days are 1.6m 6s and forecast to arrive on Friday (Jan 16) at 3PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 4s period and expected on Saturday (Jan 17) at 12AM.

Wave TypeTime (GMT) & Date Wave Height & Period
Next good surf (1 star+) 6PM (Thu 15th Jan)2.5ft (0.8m) 9s
Best Surf12AM (Sat 17th Jan)4ft (1.2m) 8s
Most Powerful 3PM (Fri 16th Jan)5ft (1.6m) 6s

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

Updates in  hr  min  s Forecast update imminent 
12 DaysHourly
Print Table

Short Range Forecast Some drizzle, heaviest during Thu afternoon. Mild temperatures (max 9°C on Sat afternoon, min 6°C on Thu night). Winds increasing (calm on Thu afternoon, fresh winds from the SSE by Fri morning).

Days 3-6 Weather Summary Light rain (total 2mm), mostly falling on Sun night. Mild temperatures (max 9°C on Sun afternoon, min 6°C on Mon night). Wind will be generally light.

Thursday
15
Friday
16
Saturday
17
Sunday
18
Monday
19
Tuesday
20
Wednesday
21
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
0
0
0
0
0
2
1
1
0
0
0
0
0
0
0
0
0
0
1
1
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
1.2
SW
0.9
SW
0.6
SW
0.9
SSW
1.6
SSW
1.2
SW
0.9
SW
0.9
SSW
0.7
SSW
0.6
SSW
0.4
SW
0.3
SW
0.2
WSW
1
SW
0.6
SW
0.1
W
0.2
WSW
0.9
SW
0.7
SW
0.6
SW
0.6
SW
Period(s) (?)89856888767765517188988
Wave
Graph
(?)Metric surfscale
Energy kJ (?)192129433521018298103472715745323632120735536
Wind
(km/h)
15
SSW
5
S
15
S
20
SSE
30
SSE
15
ESE
10
ESE
10
ESE
10
SE
10
SE
10
SE
10
SE
10
SSE
10
S
15
S
15
SSE
15
SE
15
SE
10
ESE
5
NE
5
E
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
oncross-
on		cross-
on		cross-
on		cross-
on		cross-
off		cross-
off		cross-
off		crosscrosscrosscrosscrosscross-
on		cross-
on		cross-
on		crosscrosscross-
off		offcross-
off
High Tide
/ height (m)
7:32PM
3.16
7:54AM
3.36
8:17PM
3.31
8:34AM
3.57
8:55PM
3.44
9:10AM
3.76
9:29PM
3.55
9:43AM
3.93
10:01PM
3.63
10:13AM
4.06
10:31PM
3.67
10:44AM
4.14
11:03PM
3.68
Low Tide
/ height (m)
1:54PM
1.10
2:11AM
1.03
2:37PM
0.87
2:50AM
0.82
3:15PM
0.65
3:26AM
0.63
3:52PM
0.45
4:01AM
0.47
4:27PM
0.30
4:35AM
0.37
5:03PM
0.20
5:10AM
0.34
5:39PM
0.17
Thursday
15
Friday
16
Saturday
17
Sunday
18
Monday
19
Tuesday
20
Wednesday
21
Sunrise8:23--8:22--8:22--8:21--8:19--8:18--8:18--
Sunset-4:29--4:30--4:32--4:34--4:36--4:37--4:39-
part cloud
rain showers
part cloud
part cloud
cloud
part cloud
clear
part cloud
part cloud
cloud
cloud
light rain
cloud
cloud
part cloud
part cloud
cloud
part cloud
part cloud
cloud
cloud
Rain (mm)
-1---------2---------
Temp. °C886887898897887787887
Feels °C (?)563112565565553132554
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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.

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

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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