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Surf Forecasts:

Llanddwyn Island surfForecast / Wales – Anglesy / UK

information circle12 Day Weather and Surf, issued 11 am Friday 23 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
7.5° 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 Sunday (Jan 25) at 3PM. The primary swell is predicted to be 0.4m and 18s period with a secondary swell of 0.6m and 8s. Another secondary swell of 0.6m and 4s is also forecast. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Llanddwyn Island in the next 12 days are 1.8m 13s and forecast to arrive on Friday (Jan 30) 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 1.4m 5s period and expected on Saturday (Jan 24) at 12AM.

Wave TypeTime (GMT) & Date Wave Height & Period
Next good surf (1 star+) 3PM (Sun 25th Jan)1.5ft (0.4m) 18s
Best Surf 6PM (Sun 25th Jan)2.5ft (0.8m) 17s
Most Powerful 3PM (Fri 30th Jan)6ft (1.8m) 13s

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 Light rain (total 2mm), mostly falling on Sat night. Mild temperatures (max 8°C on Fri afternoon, min 6°C on Fri night). Winds decreasing (near gales from the ESE on Sat night, light winds from the E by Sun night).

Days 3-6 Weather Summary Heavy rain (total 28mm), heaviest during Mon night. Mild temperatures (max 8°C on Wed night, min 3°C on Tue morning). Winds increasing (calm on Mon night, strong winds from the E by Tue night).

Friday
23
Saturday
24
Sunday
25
Monday
26
Tuesday
27
Wednesday
28
Thursday
29
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
0
0
0
0
0
0
0
1
2
0
0
2
1
0
0
0
2
0
0
0
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
0.5
SW
0.6
WSW
1
SW
0.6
WSW
0.5
WSW
1.6
SSE
1.4
SW
0.4
SW
0.8
WSW
0.6
SW
0.5
SW
1.3
SW
1
SW
0.4
WSW
0.3
WSW
0.9
SW
0.9
SW
0.9
SW
1.2
SW
1.2
SSW
0.7
SW
Period(s) (?)9171617185818161110891617111087612
Wave
Graph
(?)Metric surfscale
Energy kJ (?)412004961971761492817831492541881629555169170117152101159
Wind
(km/h)
30
E
35
ESE
45
ESE
30
ESE
35
ESE
50
ESE
25
E
20
ENE
15
E
20
SE
25
SE
15
ESE
5
ENE
30
E
45
E
35
ENE
20
ENE
30
S
35
S
40
SSW
35
SSW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		offcross-
off		crosscrosscross-
off		cross-
off		cross-
off		cross-
off		cross-
off		offcross-
on		cross-
on		cross-
on		on
High Tide
/ height (m)
11:50AM
4.11
12:15AM
3.59
12:30PM
3.98
12:58AM
3.48
1:16PM
3.78
1:50AM
3.33
2:12PM
3.54
2:54AM
3.18
3:25PM
3.33
4:13AM
3.13
4:50PM
3.24
5:35AM
3.23
6:13PM
3.32
Low Tide
/ height (m)
6:54PM
0.31
7:02AM
0.63
7:36PM
0.48
7:47AM
0.83
8:24PM
0.70
8:40AM
1.03
9:23PM
0.92
9:50AM
1.19
10:39PM
1.08
11:18AM
1.18
12:03AM
1.05
12:42PM
0.95
1:15AM
0.84
Friday
23
Saturday
24
Sunday
25
Monday
26
Tuesday
27
Wednesday
28
Thursday
29
Sunrise8:15--8:14--8:11--8:11--8:10--8:07--8:07--
Sunset-4:43--4:45--4:46--4:49--4:51--4:52--4:53-
cloud
cloud
part cloud
part cloud
part cloud
rain showers
part cloud
cloud
cloud
cloud
light rain
rain showers
part cloud
cloud
light rain
light rain
light rain
rain showers
light rain
rain showers
rain showers
Rain (mm)
-----2----315--2116144
Temp. °C788887666775674668888
Feels °C (?)00-10-1-3-102-10220-7-11-20-10
  • 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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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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