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Llanddwyn Island Surf Forecast
/ Wales – Anglesy (10 surf breaks) /
Surf Forecasts:
Llanddwyn Island surfForecast / Wales – Anglesy / UK
12 Day Weather and Surf, issued 5 am Tuesday 18 Nov 2025 GMT
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 Saturday (Nov 22) at 3AM. The primary swell is predicted to be 1.4m and 6s period with a secondary swell of 1.2m and 6s. Another secondary swell of 0.1m and 14s is also forecast. 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 3.0m 8s and forecast to arrive on Monday (Nov 24) at 6PM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.2m 9s period and expected on Tuesday (Nov 25) at 3AM.
| Wave Type | Time (GMT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Sat 22nd Nov) | 4.5ft (1.4m) 6s |
| Best Surf | 6PM (Mon 24th Nov) | 10ft (3.0m) 8s |
| Most Powerful | 6PM (Mon 24th Nov) | 10ft (3.0m) 8s |
Table - best surf conditions forecast for Llanddwyn Island over the next 12 days.
Short Range Forecast Light rain (total 6mm), mostly falling on Tue afternoon. Mild temperatures (max 9°C on Tue morning, min 4°C on Tue night). Winds decreasing (strong winds from the N on Tue night, light winds from the N by Thu night). | Days 3-6 Weather Summary Heavy rain (total 36mm), heaviest during Sun night. Very mild (max 10°C on Fri night, min 6°C on Fri morning). Winds increasing (light winds from the WSW on Sat afternoon, strong winds from the ENE by Sun night). | ||||||||||||||||||||
Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | |||||||||||||||
| AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Rating (10 max) | |||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
| Wave Height (m) & direction (?) | |||||||||||||||||||||
| Period(s) (?) | 4 | 6 | 7 | 13 | 7 | 7 | 6 | 12 | 12 | 4 | 3 | 6 | 7 | 7 | 6 | 6 | 7 | 5 | 8 | 7 | 9 |
Wave (?)Graph  | |||||||||||||||||||||
 kJ (?) | 24 | 154 | 296 | 3 | 0 | 0 | 136 | 3 | 3 | 6 | 9 | 141 | 54 | 18 | 7 | 11 | 26 | 54 | 233 | 362 | 1149 |
Wind (km/h) | |||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | cross- on | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- on | on | cross | cross- off | cross | cross- on | cross- on | on | cross | off | off | cross- off |
High Tide / height (m) | 8:07PM 3.73 | 8:26AM 3.77 | 8:41PM 3.77 | 8:58AM 3.85 | 9:15PM 3.77 | 9:30AM 3.86 | 9:49PM 3.71 | 10:02AM 3.82 | 10:23PM 3.59 | 10:36AM 3.74 | 10:56PM 3.44 | 11:10AM 3.63 | 11:32PM 3.26 | ||||||||
Low Tide / height (m) | 2:36PM 0.59 | 2:52AM 0.47 | 3:11PM 0.49 | 3:26AM 0.48 | 3:45PM 0.43 | 3:59AM 0.52 | 4:19PM 0.43 | 4:33AM 0.59 | 4:55PM 0.49 | 5:08AM 0.69 | 5:33PM 0.61 | 5:45AM 0.82 | 6:14PM 0.76 | ||||||||
Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | |||||||||||||||
| Sunrise | 7:46 | - | - | 7:48 | - | - | 7:48 | - | - | 7:50 | - | - | 7:52 | - | - | 7:54 | - | - | 7:56 | - | - |
| Sunset | - | 4:17 | - | - | 4:16 | - | - | 4:15 | - | - | 4:14 | - | - | 4:13 | - | - | 4:12 | - | - | 4:10 | - |
 | |  |  |  |  | | |  |  | | | | | | | |  |  | | | |
Rain (mm) | 1 | 3 | 1 | - | - | 1 | - | - | - | - | 4 | 5 | - | - | 3 | - | 2 | 22 | 12 | 12 | 4 |
| Temp. °C | 9 | 9 | 8 | 6 | 5 | 5 | 7 | 7 | 6 | 7 | 7 | 10 | 9 | 9 | 9 | 9 | 9 | 9 | 8 | 9 | 9 |
| Feels °C (?) | 1 | 1 | -2 | -3 | -4 | -3 | -1 | -1 | 1 | 1 | 0 | 4 | 6 | 5 | 5 | 5 | 5 | 6 | 0 | 2 | -4 |
- Map Icons:
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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.
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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