Surf Forecasts:
Porth Ceriad surf forecast from 17 Sep 2026:
- Most powerful swell: Saturday 19 Sep, 4AM (local time) - 8ft (2.5m), 8s period, SW swell with 735 kJ wave energy.
Best Forecast Surf Conditions for Porth Ceriad this week:
The most powerful waves expected at Porth Ceriad in the next 16 days are 2.5m 8s and forecast to arrive on Saturday (Sep 19) 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 1.6m 6s period and expected on Thursday (Sep 17) at 10PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 4AM (Sat 19th Sep) | 8ft (2.5m) 8s |
Table - best surf conditions forecast for Porth Ceriad over the next 16 days.
Short Range ForecastLight rain (total 7mm), mostly falling on Fri afternoon. Very mild (max 17°C on Fri afternoon, min 13°C on Sat night). Winds decreasing (near gales from the SW on Fri afternoon, moderate winds from the WNW by Sat night). | Days 4-6 Weather SummaryMostly dry. Very mild (max 18°C on Mon morning, min 13°C on Sun morning). Wind will be generally light. | ||||||||||||||||||||
Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | Tuesday 22 | Wednesday 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 |  |  |  |  |  |  |  | ||||||||||||||
Wave Height (m) Direction Period (s) | W 6 | W 6 | W 6 | SW 5 | SW 7 | SW 7 | WSW 7 | WSW 7 | W 5 | SW 6 | SW 6 | SW 4 | SW 4 | SW 4 | SW 4 | SW 4 | W 12 | W 12 | W 15 | SW 14 | W 12 |
Wave Graph  | |||||||||||||||||||||
 kJ | 184 | 160 | 0 | 55 | 593 | 554 | 440 | 202 | 75 | 39 | 18 | 10 | 27 | 15 | 9 | 2 | 3 | 3 | 4 | 8 | 3 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross-on | cross-on | cross-on | cross | cross-on | cross-off | cross-off | cross-on | cross-on | cross-on | cross-on | on | on | cross-on | cross-on | cross-off | off | cross-off |
High Tide | 12:34PM3.53m | 00:57AM3.28m | 1:15PM3.17m | 1:45AM2.89m | 2:13PM2.85m | 3:05AM2.60m | 4:04PM2.70m | 5:14AM2.61m | 5:48PM2.90m | 6:23AM2.86m | 6:40PM3.23m | 7:03AM3.17m | 7:16PM3.59m | ||||||||
Low Tide | 7:13PM1.16m | 7:27AM1.41m | 8:05PM1.45m | 8:28AM1.66m | 9:31PM1.65m | 10:10AM1.77m | 11:24PM1.64m | 11:57AM1.65m | 00:48AM1.40m | 1:03PM1.37m | 1:38AM1.08m | 1:48PM1.06m | 2:17AM0.76m | ||||||||
 | |  | |  |  |  | | | | |  |  | | |  | | | | | | |
 | 6:54 | — | — | 6:56 | — | — | 6:56 | — | — | 6:58 | — | — | 7:01 | — | — | 7:01 | — | — | 7:03 | — | — |
 | — | 7:29 | — | — | 7:27 | — | — | 7:24 | — | — | 7:22 | — | — | 7:20 | — | — | 7:16 | — | — | 7:15 | — |
mm | — | — | — | — | 6 | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 16 | 15 | 15 | 17 | 17 | 17 | 17 | 16 | 13 | 14 | 16 | 18 | 18 | 17 | 18 | 18 | 18 | 16 | 14 | 12 |
Feels °C | 8 | 9 | 8 | 9 | 10 | 10 | 13 | 12 | 11 | 9 | 11 | 14 | 17 | 18 | 17 | 18 | 18 | 19 | 16 | 8 | 8 |
Swell 1 Height (m) Direction Period (s) | — | — | — | NW 5 | — | — | — | — | W 14 | SW 6 | SW 6 | NW 4 | W 13 | W 13 | — | SW 4 | — | — | W 15 | SW 8 | SW 7 |
| kJ | — | — | — | 16 | — | — | — | — | 4 | 39 | 18 | 1 | 3 | 3 | — | 2 | — | — | 4 | 3 | 2 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | W 14 | NW 5 | W 14 | — | W 13 | W 6 | SW 5 | SW 5 | SW 6 | SW 6 | SW 14 | W 12 |
| kJ | — | — | — | — | — | — | — | — | — | 4 | 11 | 4 | — | 3 | 1 | 1 | 1 | 1 | 1 | 8 | 3 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | W 14 | — | — | — | — | — | W 12 | W 12 | W 11 | W 14 | — |
| kJ | — | — | — | — | — | — | — | — | — | — | 4 | — | — | — | — | — | 3 | 3 | 2 | 4 | — |
Wind waves Height (m) Direction Period (s) | W 6 | W 6 | W 6 | SW 5 | SW 7 | SW 7 | WSW 7 | WSW 7 | W 5 | NW 5 | W 4 | SW 4 | SW 4 | SW 4 | SW 4 | — | — | — | — | N 3 | NNW 5 |
| kJ | 184 | 160 | 139 | 55 | 593 | 554 | 440 | 202 | 75 | 24 | 14 | 10 | 27 | 15 | 9 | — | — | — | — | 8 | 51 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 317 | 494 | 126 | 298 | 303 | 460 | 502 | 262 | 126 | 3 | 138 | 236 | 247 | 289 | 248 | 133 | 113 | 107 | 126 | 138 | 63 |
Best forecast wave conditions in Lleyn Peninsula | |||||||||||||||||||||
Best forecast wave conditions in United Kingdom | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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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.
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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