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Llandanwg surfForecast / Wales – Mid / UK
12 Day Weather and Surf, issued 5 am Saturday 06 Dec 2025 GMTForecast update in hr min s Forecast update imminent
Llandanwg surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Llandanwg sea temperature is
9.2° C
(Which is 1.6°C colder than average for this time of year)Best Forecast Surf Conditions for Llandanwg this week:
The surf forecast for Llandanwg over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Dec 07) at 6AM. The primary swell is predicted to be 1.0m and 11s period with a secondary swell of 0.4m and 5s. Another secondary swell of 0.3m and 2s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Llandanwg in the next 12 days are 2.5m 16s and forecast to arrive on Saturday (Dec 06) at 12PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 3s period and expected on Tuesday (Dec 09) at 12AM.
| Wave Type | Time (GMT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Sun 7th Dec) | 3.5ft (1.0m) 11s |
| Best Surf | 6AM (Sun 7th Dec) | 3.5ft (1.0m) 11s |
| Most Powerful | 12PM (Sat 6th Dec) | 8ft (2.5m) 16s |
Table - best surf conditions forecast for Llandanwg over the next 12 days.
Updates in hr min s Forecast update imminent
Short Range Forecast Heavy rain (total 47mm), heaviest during Mon night. Very mild (max 13°C on Mon night, min 9°C on Sat night). Winds increasing (light winds from the ESE on Sat night, strong winds from the S by Mon night). | Days 3-6 Weather Summary Moderate rain (total 17mm), heaviest on Tue morning. Very mild (max 14°C on Tue morning, min 7°C on Wed night). Winds decreasing (near gales from the S on Tue morning, light winds from the SE by Thu afternoon). | ||||||||||||||||||||
Saturday 06 | Sunday 07 | Monday 08 | Tuesday 09 | Wednesday 10 | Thursday 11 | Friday 12 | |||||||||||||||
| 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) (?) | 12 | 16 | 10 | 10 | 6 | 11 | 11 | 11 | 11 | 11 | 13 | 14 | 13 | 12 | 11 | 8 | 9 | 10 | 11 | 11 | 11 |
Wave (?)Graph  | |||||||||||||||||||||
 kJ (?) | 1631 | 3436 | 490 | 138 | 135 | 406 | 523 | 572 | 232 | 1594 | 2587 | 1858 | 1083 | 850 | 422 | 338 | 402 | 695 | 1087 | 829 | 119 |
Wind (km/h) | |||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | on | on | on | cross- off | on | cross- on | on | on | cross | cross- on | on | on | on | on | cross- on | cross- on | cross | cross | cross- on | on | cross- on |
High Tide / height (m) | 8:52PM 4.50 | 9:12AM 4.70 | 9:39PM 4.29 | 9:59AM 4.56 | 10:27PM 3.98 | 10:48AM 4.32 | 11:17PM 3.64 | 11:39AM 4.01 | 12:11AM 3.31 | 12:36PM 3.70 | 1:14AM 3.05 | 1:41PM 3.43 | 2:29AM 2.94 | ||||||||
Low Tide / height (m) | 3:43PM 0.14 | 4:02AM 0.41 | 4:35PM 0.19 | 4:50AM 0.56 | 5:27PM 0.32 | 5:38AM 0.74 | 6:20PM 0.52 | 6:28AM 0.94 | 7:14PM 0.73 | 7:20AM 1.13 | 8:10PM 0.92 | 8:17AM 1.28 | 9:08PM 1.06 | ||||||||
Saturday 06 | Sunday 07 | Monday 08 | Tuesday 09 | Wednesday 10 | Thursday 11 | Friday 12 | |||||||||||||||
| Sunrise | 8:11 | - | - | 8:12 | - | - | 8:14 | - | - | 8:15 | - | - | 8:17 | - | - | 8:18 | - | - | 8:18 | - | - |
| Sunset | - | 4:01 | - | - | 4:00 | - | - | 4:00 | - | - | 4:00 | - | - | 4:00 | - | - | 4:00 | - | - | 4:00 | - |
 |  |  | |  |  | | |  | | | | |  | |  | |  | | | | |
Rain (mm) | 6 | 4 | - | 5 | 4 | 7 | 2 | 2 | 17 | 9 | 1 | 4 | 1 | - | - | - | - | 2 | 3 | 1 | 1 |
| Temp. °C | 11 | 11 | 10 | 10 | 12 | 12 | 11 | 11 | 13 | 14 | 12 | 11 | 10 | 10 | 9 | 10 | 10 | 11 | 11 | 9 | 9 |
| Feels °C (?) | 3 | 2 | 3 | 6 | 7 | 3 | 5 | 6 | 4 | 4 | 3 | 4 | 3 | 4 | 4 | 5 | 5 | 6 | 4 | 5 | 5 |
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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 Llandanwg 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.
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Information about the Llandanwg Surf forecast
The above surf forecast table for Llandanwg provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Llandanwg can be found by selecting the local surf guide option on the grey menu. Our Llandanwg 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 (Llandanwg) 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 Llandanwg 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.
Llandanwg is 10 km (6 miles) from Porthmadog. If you plan a holiday in Mid Wales, look for hotels and other accommodation in Porthmadog. Porthmadog has rooms for a wide range of budgets as well as car hire and transport links.
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