Surf Forecasts:
Porth Ceriad surf forecast from 11 Aug 2026:
- Most powerful swell: Friday 14 Aug, 1AM (local time) - 3ft (0.9m), 5s period, WSW swell with 45 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 0.9m 5s and forecast to arrive on Friday (Aug 14) at 1AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 4s period and expected on Saturday (Aug 15) at 4AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 1AM (Fri 14th Aug) | 3ft (0.9m) 5s |
Table - best surf conditions forecast for Porth Ceriad over the next 16 days.
The Lowdown
Alright folks, ol' Rusty here with a look at what's comin' our way. Gotta be straight with ya, it's a tough stretch for waves around Porth Ceriad. We're lookin' at a long, dry spell before anything remotely worth paddling out for shows up, so patience is the name of the game.
The first half of this forecast window is a real snoozer. From Monday the 10th of August all the way through until Friday the 21st of August, we've got virtually nothing. It's a rough, flat, and choppy run with swell heights barely tickling the 2 ft and the combined energy is just a whisper, mostly in the single digits. The wind is all over the place, but the waves just aren't there. You’d be better off doing a lap of the headland than staring at the ocean.
Then, things start to look a little interesting on the afternoon of Friday the 21st of August. The swell finally shows up, but it's a messy one. We're looking at a 6 ft SW swell (period of 6 seconds) with a fresh cross-onshore wind from the SW blowing at 19 mph. The combined energy jumps to 208 (moderate), but that onshore wind is gonna make it lumpy and tough. It's a lot of work for not much reward, and honestly, it looks more like a kite-surfing kind of setup than a clean paddle session.
The real standout, the one that gets the heart pumping, is the afternoon of Saturday the 22nd of August. This is where it gets proper. A solid 8 ft WNW swell, with a period of 7 seconds, is forecast to roll in. The combined energy (577) is strong, and the wind is set to go offshore from the NNW at 16 mph. That's a recipe for some powerful, clean lines at Porth Ceriad. Now, this is a big one – over 8 ft – so it's only for the experienced crew. Beginners, sit this one out on the beach. The water temp is a notable 65°F in the first session, which is much warmer than normal for this time of year, so you might not even need a thick wetsuit.
After that peak, it trails off again. The rest of the run into the end of the month is back to tiny swells and clean but tiny conditions. The wind stays favorable, but the energy just isn't there.
Signing off,
Rusty
Short Range ForecastMostly dry. Warm (max 25°C on Wed afternoon, min 16°C on Mon afternoon). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 20°C on Thu afternoon, min 14°C on Fri night). Wind will be generally light. | |||||||||||||||||||
Mon 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | ||||||||||||||
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) | SW 6 | SW 6 | SE 3 | SW 6 | W 11 | WSW 10 | WSW 10 | WSW 9 | SW 8 | SW 8 | WSW 5 | SW 5 | SW 5 | SW 5 | SW 5 | SW 7 | SW 7 | SW 5 | WSW 5 | W 7 |
Wave Graph  | ||||||||||||||||||||
 kJ | 5 | 6 | 2 | 2 | 3 | 10 | 9 | 16 | 18 | 15 | 45 | 13 | 7 | 7 | 7 | 8 | 2 | 6 | 2 | 1 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | cross-on | cross | cross-on | cross-on | cross-off | glassy | on | cross-on | on | cross-off | cross-off | off | cross-off | cross-off | cross-off | off | cross-off | off |
High Tide | 7:06PM3.90m | 7:36AM3.87m | 7:59PM4.30m | 8:26AM4.13m | 8:47PM4.64m | 9:12AM4.31m | 9:31PM4.85m | 9:55AM4.39m | 10:13PM4.92m | 10:36AM4.37m | 10:55PM4.81m | 11:16AM4.24m | 11:35PM4.56m | |||||||
Low Tide | 2:37AM0.52m | 2:57PM0.55m | 3:28AM0.17m | 3:43PM0.31m | 4:13AM-0.07m | 4:24PM0.16m | 4:55AM-0.16m | 5:03PM0.12m | 5:34AM-0.10m | 5:40PM0.20m | 6:11AM0.09m | 6:16PM0.37m | ||||||||
 |  |  | |  | | | | | | |  | | | | |  | | | | |
 | — | — | 5:52 | — | — | 5:52 | — | — | 5:54 | — | — | 5:56 | — | — | 5:58 | — | — | 6:00 | — | — |
 | 8:54 | — | — | 8:52 | — | — | 8:51 | — | — | 8:49 | — | — | 8:46 | — | — | 8:45 | — | — | 8:43 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 17 | 16 | 21 | 21 | 21 | 23 | 25 | 24 | 20 | 20 | 18 | 16 | 18 | 17 | 15 | 16 | 16 | 15 | 15 | 14 |
Feels °C | 13 | 12 | 20 | 20 | 21 | 22 | 22 | 22 | 20 | 20 | 18 | 13 | 15 | 15 | 11 | 13 | 14 | 13 | 11 | 11 |
Swell 1 Height (m) Direction Period (s) | SW 6 | NNW 3 | SW 6 | SW 6 | SW 6 | WSW 10 | WSW 10 | WSW 9 | SW 8 | SW 8 | WSW 5 | SW 5 | SW 5 | SW 5 | SW 5 | SW 7 | NNW 4 | SW 5 | WSW 5 | SW 4 |
| kJ | 5 | 1 | 2 | 2 | 1 | 10 | 9 | 16 | 18 | 15 | 45 | 13 | 7 | 7 | 7 | 8 | 1 | 6 | 2 | 1 |
Swell 2 Height (m) Direction Period (s) | — | SW 6 | — | — | — | SW 6 | SW 6 | WSW 6 | — | WSW 9 | SW 9 | W 8 | NW 4 | SW 8 | SW 7 | W 8 | SW 7 | NNW 3 | W 7 | W 7 |
| kJ | — | 6 | — | — | — | 1 | 1 | 4 | — | 8 | 3 | 1 | 4 | 2 | 2 | 1 | 2 | 1 | 1 | 1 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | W 11 | — | — | — | — | — | — | W 11 | W 8 | — | — | — | W 3 | W 8 | — | — |
| kJ | — | — | — | — | 3 | — | — | — | — | — | — | 2 | 1 | — | — | — | 1 | 1 | — | — |
Wind waves Height (m) Direction Period (s) | NNW 3 | ENE 2 | SE 3 | — | — | — | — | — | — | WSW 3 | SW 5 | NW 4 | WSW 5 | NW 3 | NW 4 | NW 4 | — | — | — | — |
| kJ | 4 | 1 | 1 | — | — | — | — | — | — | 1 | 25 | 9 | 5 | 6 | 24 | 12 | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 306 | 254 | 321 | 329 | 113 | 113 | 132 | 125 | 135 | 252 | 138 | 138 | 306 | 113 | 138 | 138 | 303 | 254 | 363 | 308 |
Best forecast wave conditions in Lleyn Peninsula | ||||||||||||||||||||
Best forecast wave conditions in United Kingdom | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
Latest Updates
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.
Nearest