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Porth Ceriad Surf Forecast
/ Wales – Lleyn (14 surf breaks) /
Surf Forecasts:
Porth Ceriad surfForecast / Wales – Lleyn / UK
16 Day Weather and Surf, issued 12 am Sunday 17 May 2026 BSTForecast 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
11.8° C
(Which is 1.0°C warmer than normal for this time of year)Best Forecast Surf Conditions for Porth Ceriad this week:
The surf forecast for Porth Ceriad over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (May 18) at 4AM. The primary swell is predicted to be 0.9m and 6s period with a secondary swell of 0.4m and 4s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Porth Ceriad in the next 16 days are 2.3m 7s and forecast to arrive on Wednesday (May 20) at 4AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.2m 4s period and expected on Monday (May 18) at 1PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4AM (Mon 18th May) | 3ft (0.9m) 6s |
| Best Surf | 4AM (Mon 18th May) | 3ft (0.9m) 6s |
| Most Powerful | 4AM (Wed 20th May) | 7.5ft (2.3m) 7s |
Table - best surf conditions forecast for Porth Ceriad over the next 16 days.
Updates in hr min s Forecast update imminent
Short Range ForecastModerate rain (total 19mm), heaviest on Sun night. Very mild (max 12°C on Sat night, min 9°C on Sat night). Winds increasing (calm on Mon morning, strong winds from the SW by Tue morning). | Days 4-6 Weather SummaryLight rain (total 3mm), mostly falling on Wed night. Warm (max 21°C on Fri morning, min 12°C on Tue night). Winds decreasing (strong winds from the SSW on Tue night, light winds from the SE by Thu night). | ||||||||||||||||||||
Sunday 17 | Monday 18 | Tuesday 19 | Wednesday 20 | Thursday 21 | Friday 22 | Saturday 23 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
W 5 | SW 5 | WSW 6 | SW 6 | SW 6 | SW 6 | SW 6 | SW 7 | SW 7 | SW 7 | SW 7 | SW 6 | SW 6 | SW 7 | SW 10 | SW 11 | SW 11 | SW 11 | WSW 10 | SW 10 | WSW 9 | |
44 | 51 | 68 | 39 | 19 | 9 | 102 | 436 | 537 | 368 | 312 | 89 | 88 | 55 | 77 | 117 | 198 | 112 | 65 | 47 | 34 | |
Wind (km/h) | |||||||||||||||||||||
cross | cross-on | cross | glassy | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | on | cross-on | cross-on | cross-on | on | cross | on | glassy | cross-off | |
High Tide | 9:04AM4.68m | 9:27PM4.69m | 9:50AM4.65m | 10:11PM4.70m | 10:37AM4.48m | 10:58PM4.58m | 11:26AM4.19m | 11:47PM4.37m | 12:18PM3.82m | 00:41AM4.09m | 1:15PM3.46m | 1:42AM3.81m | 2:23PM3.18m | 2:52AM3.59m | |||||||
Low Tide | 4:14PM0.22m | 4:39AM0.16m | 5:02PM0.31m | 5:30AM0.18m | 5:51PM0.47m | 6:24AM0.28m | 6:43PM0.67m | 7:21AM0.44m | 7:38PM0.87m | 8:21AM0.62m | 8:36PM1.06m | 9:24AM0.78m | 9:40PM1.18m | ||||||||
 | |  |  |  |  | |  |  | |  |  | | |  | | | | | |  | |
 | 5:18 | — | — | 5:16 | — | — | 5:15 | — | — | 5:13 | — | — | 5:11 | — | — | 5:11 | — | — | 5:09 | — | — |
 | — | — | 9:10 | — | — | 9:12 | — | — | 9:14 | — | — | 9:15 | — | — | 9:16 | — | — | 9:17 | — | — | 9:20 |
1 | 2 | 6 | 1 | — | 6 | 2 | — | — | — | — | 3 | — | — | — | — | — | — | — | — | — | |
Temp °C | 10 | 10 | 10 | 9 | 11 | 12 | 12 | 12 | 12 | 13 | 13 | 13 | 15 | 16 | 18 | 21 | 21 | 20 | 18 | 16 | 18 |
3 | 4 | 4 | 7 | 7 | 6 | 6 | 4 | 5 | 6 | 7 | 8 | 11 | 12 | 15 | 18 | 20 | 19 | 18 | 17 | 18 | |
Swell 1 Height (m) Direction Period (s) | W 12 | NW 4 | WSW 6 | SW 6 | SW 6 | SW 6 | — | — | — | — | WSW 14 | WSW 8 | SW 7 | SW 7 | SW 10 | SW 11 | SW 11 | SW 11 | WSW 10 | SW 10 | WSW 9 |
 kJ | 3 | 3 | 68 | 39 | 19 | 9 | — | — | — | — | 18 | 28 | 38 | 55 | 77 | 117 | 198 | 112 | 65 | 47 | 34 |
Swell 2 Height (m) Direction Period (s) | — | — | W 12 | WNW 4 | WNW 3 | — | — | — | — | — | — | WSW 12 | W 10 | W 15 | — | — | — | — | SW 4 | — | SW 14 |
| kJ | — | — | 3 | 1 | 1 | — | — | — | — | — | — | 13 | 8 | 4 | — | — | — | — | 4 | — | 7 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | W 5 | SW 5 | — | — | — | SSE 3 | SW 6 | SW 7 | SW 7 | SW 7 | SW 7 | SW 6 | SW 6 | — | — | SE 3 | SSW 4 | ESE 2 | — | — | — |
| kJ | 44 | 51 | — | — | — | 3 | 102 | 436 | 537 | 368 | 312 | 89 | 88 | — | — | 5 | 5 | 1 | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 303 | 298 | 3 | 0 | 252 | 246 | 301 | 307 | 272 | 303 | 303 | 180 | 180 | 151 | 70 | 33 | 60 | 5 | 3 | 0 | 0 |
Best forecast wave conditions in Lleyn Peninsula | |||||||||||||||||||||
Best forecast wave conditions in United Kingdom | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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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 16 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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