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Porth Ceriad Surf Forecast
/ Wales – Lleyn (14 surf breaks) /
Surf Forecasts:
Porth Ceriad surfForecast / Wales – Lleyn / UK
12 Day Weather and Surf, issued 11 pm Monday 08 Dec 2025 GMTForecast update in hr min s Forecast update imminent
Porth Ceriad surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Porth Ceriad sea temperature is
10.3° C
(Which is normal for this time of year)Best Forecast Surf Conditions for Porth Ceriad this week:
The surf forecast for Porth Ceriad over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Dec 16) at 3AM. The primary swell is predicted to be 3.0m and 8s period. The wind is predicted to be cross-shore as the swell arrives.
The most powerful waves expected at Porth Ceriad in the next 12 days are 4.5m 13s and forecast to arrive on Tuesday (Dec 09) at 6PM. Winds are predicted to be cross-onshore at the time the swell arrives.
| Wave Type | Time (GMT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Tue 16th Dec) | 10ft (3.0m) 8s |
| Best Surf | 3AM (Tue 16th Dec) | 10ft (3.0m) 8s |
| Most Powerful | 6PM (Tue 9th Dec) | 15ft (4.5m) 13s |
Table - best surf conditions forecast for Porth Ceriad over the next 12 days.
Updates in hr min s Forecast update imminent
Short Range Forecast Heavy rain (total 31mm), heaviest during Mon night. Very mild (max 14°C on Tue morning, min 10°C on Wed morning). Winds increasing (fresh winds from the S on Mon night, gales from the S by Tue morning). | Days 3-6 Weather Summary Light rain (total 5mm), mostly falling on Fri morning. Very mild (max 11°C on Thu night, min 8°C on Fri morning). Winds increasing (light winds from the WNW on Fri morning, strong winds from the S by Sun afternoon). | |||||||||||||||||||||
Tuesday 09 | Wednesday 10 | Thursday 11 | Friday 12 | Saturday 13 | Sunday 14 | Mon 15 | ||||||||||||||||
| Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | ||
Rating (10 max) | ||||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  |  | ||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||
| Period(s) (?) | 10 | 11 | 12 | 13 | 12 | 12 | 11 | 7 | 9 | 13 | 13 | 13 | 10 | 10 | 5 | 7 | 8 | 8 | 9 | 9 | 9 | |
Wave (?)Graph  | ||||||||||||||||||||||
 kJ (?) | 488 | 2393 | 6479 | 3923 | 1829 | 1158 | 743 | 440 | 516 | 1435 | 848 | 364 | 459 | 231 | 71 | 382 | 834 | 978 | 1366 | 457 | 276 | |
Wind (km/h) | ||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | on | cross- on | cross- on | cross- on | cross- on | cross- on | on | on | cross- on | cross- off | cross- on | cross- on | cross- on | cross- on | on | on | on | on | on | on | |
High Tide / height (m) | 10:35PM 3.99 | 10:55AM 4.33 | 11:25PM 3.65 | 11:47AM 4.04 | 12:20AM 3.33 | 12:44PM 3.73 | 1:23AM 3.08 | 1:50PM 3.47 | 2:37AM 2.97 | 3:03PM 3.31 | 3:49AM 3.02 | 4:10PM 3.28 | 4:48AM 3.17 | 5:07PM 3.34 | ||||||||
Low Tide / height (m) | 5:49AM 0.69 | 6:29PM 0.47 | 6:38AM 0.90 | 7:23PM 0.69 | 7:30AM 1.11 | 8:19PM 0.90 | 8:27AM 1.27 | 9:18PM 1.05 | 9:29AM 1.37 | 10:19PM 1.13 | 10:38AM 1.38 | 11:19PM 1.14 | 11:43AM 1.30 | |||||||||
Tuesday 09 | Wednesday 10 | Thursday 11 | Friday 12 | Saturday 13 | Sunday 14 | Mon 15 | ||||||||||||||||
| Sunrise | - | 8:17 | - | - | 8:18 | - | - | 8:18 | - | - | 8:19 | - | - | 8:21 | - | - | 8:22 | - | - | 8:22 | - | |
| Sunset | - | - | 4:01 | - | - | 4:01 | - | - | 4:01 | - | - | 4:01 | - | - | 4:01 | - | - | 4:01 | - | - | 4:01 | |
 |  |  |  |  | | |  | |  | | |  | | |  |  | | |  | | ||
Rain (mm) | 19 | 11 | 1 | - | - | - | - | - | - | 1 | 2 | 1 | 1 | - | - | - | - | - | 1 | 1 | 2 | |
| Temp. °C | 13 | 14 | 12 | 11 | 11 | 10 | 10 | 11 | 11 | 11 | 10 | 11 | 10 | 10 | 10 | 10 | 10 | 10 | 11 | 11 | 11 | |
| Feels °C (?) | 3 | 4 | -1 | 0 | 3 | 2 | 2 | 2 | 2 | 3 | 4 | 5 | 4 | 3 | 1 | 1 | 1 | 0 | 2 | 3 | 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)
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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 Porth Ceriad 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 Porth Ceriad Surf forecast
The above surf forecast table for Porth Ceriad provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Porth Ceriad can be found by selecting the local surf guide option on the grey menu. Our Porth Ceriad 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 (Porth Ceriad) 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 Porth Ceriad 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.
Porth Ceriad is 29 km (18 miles) from Porthmadog. If you plan a holiday in Lleyn Peninsula, 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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