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Surf Forecasts:

Llanddwyn Island surfForecast / Wales – Anglesy / UK

information circle12 Day Weather and Surf, issued 5 am Saturday 10 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
8.1° 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 Friday (Jan 16) at 12AM. The primary swell is predicted to be 0.7m and 8s period with a secondary swell of 0.3m and 18s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Llanddwyn Island in the next 12 days are 3.5m 10s and forecast to arrive on Sunday (Jan 11) at 9PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 5s period and expected on Wednesday (Jan 14) at 3AM.

Wave TypeTime (GMT) & Date Wave Height & Period
Next good surf (1 star+)12AM (Fri 16th Jan)2.5ft (0.7m) 8s
Best Surf12AM (Fri 16th Jan)2.5ft (0.7m) 8s
Most Powerful 9PM (Sun 11th Jan)11ft (3.5m) 10s

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 Moderate rain (total 19mm), heaviest on Sun afternoon. Very mild (max 11°C on Sun afternoon, min 5°C on Sat morning). Winds increasing (calm on Sat morning, near gales from the SW by Sun night).

Days 3-6 Weather Summary Moderate rain (total 15mm), heaviest on Tue morning. Mild temperatures (max 9°C on Tue morning, min 4°C on Thu night). Winds decreasing (strong winds from the W on Tue night, light winds from the E by Thu night).

Saturday
10
Sunday
11
Monday
12
Tuesday
13
Wednesday
14
Thursday
15
Friday
16
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
0.5
SW
0.5
SW
1.1
SSW
2.5
SSW
2.3
SSW
3
SW
2.1
SW
1.8
SW
1.9
SW
1.6
WSW
1
SW
0.6
SW
0.5
SW
1.4
SW
1.9
SW
1.3
SW
0.3
WSW
0.7
SW
0.5
SW
0.4
SW
0.4
SW
Period(s) (?)8958810101161010101058819881716
Wave
Graph
(?)Metric surfscale
Energy kJ (?)31375477071314268177162845622167748874582117064307068
Wind
(km/h)
5
WNW
10
S
35
S
50
S
45
SSE
50
SW
30
SSW
20
SSW
30
S
30
SSE
30
W
40
W
35
SW
40
WSW
35
WSW
25
WSW
15
SSW
10
E
15
ENE
25
NE
25
NNE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
glasscross-
on		cross-
on		cross-
on		cross-
on		ononcross-
on		cross-
on		cross-
on		cross-
on		cross-
on		ononcross-
on		cross-
on		oncross-
off		offoffcross-
off
High Tide
/ height (m)
2:14PM
3.47
2:56AM
3.02
3:15PM
3.20
4:01AM
2.93
4:24PM
3.03
5:09AM
2.93
5:35PM
2.97
6:12AM
3.02
6:38PM
3.03
7:07AM
3.17
7:32PM
3.16
7:54AM
3.36
8:17PM
3.31
Low Tide
/ height (m)
9:06PM
0.97
9:19AM
1.30
10:04PM
1.22
10:30AM
1.46
11:15PM
1.35
11:52AM
1.46
12:28AM
1.34
1:02PM
1.32
1:26AM
1.21
1:54PM
1.10
2:11AM
1.03
2:37PM
0.87
2:50AM
0.82
Saturday
10
Sunday
11
Monday
12
Tuesday
13
Wednesday
14
Thursday
15
Friday
16
Sunrise8:27--8:26--8:26--8:26--8:25--8:23--8:22--
Sunset-4:22--4:22--4:24--4:25--4:28--4:29--4:30-
part cloud
part cloud
light rain
light rain
light rain
rain showers
light rain
rain showers
part cloud
mod rain
part cloud
part cloud
light rain
rain showers
rain showers
clear
clear
clear
cloud
cloud
mod rain
Rain (mm)
--224524-9--231-----7
Temp. °C667911111099977897886565
Feels °C (?)32-4-2104432-1-301-2243-1-1-1
  • 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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Latest Updates

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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:
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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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