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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 17 Nov 2025 GMT
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 Saturday (Nov 22) at 12AM. The primary swell is predicted to be 1.4m and 7s period with a secondary swell of 0.1m and 14s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Porth Ceriad in the next 12 days are 2.3m 7s and forecast to arrive on Friday (Nov 21) 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 1.7m 6s period and expected on Tuesday (Nov 18) at 3PM.
| Wave Type | Time (GMT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Sat 22nd Nov) | 4.5ft (1.4m) 7s |
| Best Surf | 12AM (Sat 22nd Nov) | 4.5ft (1.4m) 7s |
| Most Powerful | 9PM (Fri 21st Nov) | 7.5ft (2.3m) 7s |
Table - best surf conditions forecast for Porth Ceriad over the next 12 days.
Short Range Forecast Light rain (total 9mm), mostly falling on Tue morning. Very mild (max 10°C on Tue afternoon, min 4°C on Tue night). Winds increasing (light winds from the NW on Mon night, strong winds from the NNW by Tue night). | Days 3-6 Weather Summary Moderate rain (total 18mm), heaviest on Fri night. Very mild (max 10°C on Fri night, min 7°C on Thu night). Winds decreasing (strong winds from the SSW on Fri afternoon, light winds from the WNW by Sat night). | |||||||||||||||||||||
Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Mon 24 | ||||||||||||||||
| 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) (?) | 13 | 4 | 6 | 5 | 13 | 12 | 7 | 13 | 13 | 12 | 15 | 4 | 7 | 7 | 13 | 6 | 6 | 6 | 7 | 7 | 6 | |
Wave (?)Graph  | ||||||||||||||||||||||
 kJ (?) | 3 | 0 | 0 | 7 | 3 | 3 | 0 | 3 | 3 | 3 | 4 | 27 | 173 | 36 | 3 | 20 | 19 | 26 | 12 | 22 | 6 | |
Wind (km/h) | ||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | cross | cross- off | off | off | off | off | off | off | off | cross | cross- on | cross- off | cross- off | cross- off | cross- off | cross- off | cross- on | cross- on | cross- off | cross- off | |
High Tide / height (m) | 6:46AM 3.83 | 7:01PM 3.94 | 7:20AM 3.99 | 7:36PM 4.01 | 7:53AM 4.09 | 8:10PM 4.02 | 8:26AM 4.12 | 8:43PM 3.97 | 8:59AM 4.10 | 9:17PM 3.87 | 9:32AM 4.03 | 9:51PM 3.73 | 10:08AM 3.91 | |||||||||
Low Tide / height (m) | 1:31AM 0.65 | 1:47PM 0.74 | 2:02AM 0.63 | 2:19PM 0.65 | 2:33AM 0.64 | 2:51PM 0.60 | 3:03AM 0.67 | 3:25PM 0.61 | 3:35AM 0.74 | 4:01PM 0.68 | 4:10AM 0.84 | 4:40PM 0.80 | 4:47AM 0.97 | 5:23PM 0.95 | ||||||||
Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Mon 24 | ||||||||||||||||
| Sunrise | - | 7:45 | - | - | 7:47 | - | - | 7:48 | - | - | 7:50 | - | - | 7:52 | - | - | 7:52 | - | - | 7:54 | - | |
| Sunset | - | - | 4:20 | - | - | 4:19 | - | - | 4:16 | - | - | 4:15 | - | - | 4:15 | - | - | 4:14 | - | - | 4:13 | |
 |  |  |  |  |  | | | | |  | | | | | | | |  | | | ||
Rain (mm) | - | 1 | 2 | 1 | - | - | 4 | 1 | - | - | - | 4 | 14 | - | - | - | - | - | 19 | 5 | 4 | |
| Temp. °C | 8 | 9 | 10 | 8 | 6 | 6 | 6 | 7 | 7 | 7 | 7 | 8 | 10 | 9 | 10 | 10 | 9 | 10 | 10 | 8 | 9 | |
| Feels °C (?) | 2 | 1 | 0 | -3 | -5 | -4 | -5 | -2 | -2 | 0 | 2 | -1 | 2 | 3 | 5 | 6 | 5 | 4 | 2 | -7 | -7 | |
- Map Icons:
Break
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 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.
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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