Surf Forecasts:
Porth Ceriad surf forecast from 13 Aug 2026:
- Best quality surf: Thursday 20 Aug, 1AM (local time) - 7ft (2.1m), 7s period, NW swell with offshore winds.
- Most powerful swell: Wednesday 19 Aug, 10AM (local time) - 7ft (2.2m), 7s period, WSW swell with 467 kJ wave energy.
- Next surfable swell (1★+): Thursday 20 Aug, 1AM (local time) - 7ft (2.1m), 7s period with NW swell.
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 Thursday (Aug 20) at 1AM. The primary swell is predicted to be 2.1m and 7s period with a secondary swell of 0.7m and 7s. Another secondary swell of 0.2m and 12s is also forecast. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Porth Ceriad in the next 16 days are 2.2m 7s and forecast to arrive on Wednesday (Aug 19) at 10AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.9m 7s period and expected on Thursday (Aug 20) at 7AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Thu 20th Aug) | 7ft (2.1m) 7s |
| Best Surf | 1AM (Thu 20th Aug) | 7ft (2.1m) 7s |
| Most Powerful | 10AM (Wed 19th Aug) | 7ft (2.2m) 7s |
Table - best surf conditions forecast for Porth Ceriad over the next 16 days.
The Lowdown
Alright folks, Rusty here. Grab a brew and let’s talk about what’s happening at Porth Ceriad.
To be straight with you, if you’re looking for a proper surf over the next 16 days, this stretch of coast is going to be a tough nut to crack. We’ve got a massive gap where there’s just nothing worth paddling out for. From the start on Thursday the 13th, right through until almost the end of the period, it’s a write-off. The swell is tiny, often below 2 ft, and the energy is weak, barely registering on the scale. There’s a brief flicker of hope around Wednesday the 19th, but even that comes with a heap of caveats.
The only time the ocean shows any real pulse is on Wednesday the 19th. The morning sees a 7 ft swell from the WSW with a moderate wave energy of 467, which is the biggest we get. The wind is cross-offshore from the NW, so the surf will be clean. But look, at that size, this isn’t a beginner's wave. It’s solid, proper stuff, and with the period sitting at just 7 seconds, it’s going to be a bit lumpy and sectiony. The afternoon drops to 6 ft with energy at 280, still clean with that cross-off breeze, and it is the best call of the whole run, but I’d call it "promising" rather than a sure thing given the shorter period. After that, it fades fast. By Thursday the 20th, we’re back to tiny, weak conditions.
Don’t get your hopes up for the rest of it. There’s a run of glassy, clean mornings from the 21st to the 23rd, but the swell is barely a ripple at 0.3 ft. It’s more of a lake than a surf break. You can have a nice float on a SUP, but that’s about it. From the 24th onward, the wind gets nasty, with strong cross-onshore and even some heavy rain and thunderstorms forecast for the 26th. The week after the 19th is just noise; the swell tries to pick up again on the 27th of August with 5 ft swell, but the onshore wind is howling at 25 mph, making it a total mess.
Bottom line: If you’re desperate, Wednesday the 19th is the only day that offers anything with shape, and even then it’s for experienced surfers only. The water temp is about average for the time of year. For the rest of us, it’s a waiting game. This is one of those stretches where the ocean just shuts down, and forecasts can change, but right now, it’s looking lean. Hang tight.
Rusty.
Short Range ForecastSome drizzle, heaviest during Fri morning. Warm (max 27°C on Wed night, min 14°C on Fri night). Winds increasing (calm on Thu night, fresh winds from the NNW by Sat morning). | Days 4-6 Weather SummaryLight rain (total 9mm), mostly falling on Mon afternoon. Very mild (max 19°C on Tue morning, min 13°C on Sat night). Winds increasing (calm on Sun night, strong winds from the SW by Tue afternoon). | ||||||||||||||||||||
Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | |||||||||||||||
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) | SW 8 | SW 8 | WSW 4 | SW 4 | SW 4 | SW 7 | WSW 7 | WSW 7 | SW 7 | SW 7 | SW 7 | W 7 | SSW 3 | SW 6 | WSW 6 | SW 6 | SW 6 | SW 6 | WSW 7 | WSW 6 | NW 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 17 | 14 | 13 | 9 | 3 | 8 | 5 | 5 | 2 | 2 | 2 | 1 | 8 | 138 | 69 | 31 | 16 | 237 | 467 | 280 | 371 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | on | glassy | off | off | off | off | off | off | cross-off | glassy | on | cross-on | cross | cross-on | cross-on | cross-off | cross-off | cross-off | off |
High Tide | 9:12AM4.31m | 9:31PM4.85m | 9:55AM4.39m | 10:13PM4.92m | 10:36AM4.37m | 10:55PM4.81m | 11:16AM4.24m | 11:35PM4.56m | 11:55AM4.03m | 00:15AM4.20m | 12:35PM3.75m | 00:56AM3.78m | 1:17PM3.43m | 1:41AM3.34m | |||||||
Low Tide | 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 | 6:46AM0.37m | 6:49PM0.61m | 7:18AM0.70m | 7:22PM0.88m | 7:50AM1.04m | 7:58PM1.17m | |||||||
 |  |  |  |  | | | | | | | | |  |  | | | | | | | |
 | 5:54 | — | — | 5:56 | — | — | 5:58 | — | — | 6:00 | — | — | 6:01 | — | — | 6:03 | — | — | 6:05 | — | — |
 | — | 8:49 | — | — | 8:46 | — | — | 8:45 | — | — | 8:43 | — | — | 8:40 | — | — | 8:38 | — | — | 8:37 | — |
mm | — | — | — | 1 | — | — | — | — | — | — | — | — | 1 | 6 | 2 | — | — | — | — | — | — |
Temp °C | 21 | 21 | 19 | 18 | 19 | 16 | 14 | 16 | 15 | 15 | 16 | 16 | 17 | 17 | 18 | 19 | 18 | 18 | 16 | 17 | 16 |
Feels °C | 21 | 21 | 19 | 20 | 15 | 12 | 9 | 12 | 11 | 12 | 13 | 13 | 14 | 14 | 18 | 18 | 11 | 12 | 10 | 13 | 12 |
Swell 1 Height (m) Direction Period (s) | SW 8 | SW 8 | SW 8 | SW 4 | SW 4 | SW 7 | WSW 7 | WSW 7 | SW 7 | SW 7 | SW 7 | N 3 | W 7 | — | WSW 6 | SW 6 | NW 4 | — | — | — | SW 7 |
| kJ | 17 | 14 | 2 | 9 | 3 | 8 | 5 | 5 | 2 | 2 | 2 | 1 | 1 | — | 69 | 31 | 2 | — | — | — | 51 |
Swell 2 Height (m) Direction Period (s) | — | SW 10 | SW 9 | — | SW 7 | — | W 10 | — | — | W 7 | — | W 7 | — | — | — | NW 4 | W 17 | — | — | — | WSW 12 |
| kJ | — | 4 | 3 | — | 2 | — | 2 | — | — | 1 | — | 1 | — | — | — | 7 | 5 | — | — | — | 15 |
Swell 3 Height (m) Direction Period (s) | — | — | W 6 | SW 8 | — | — | — | — | — | — | — | — | — | — | — | W 16 | — | — | — | — | — |
| kJ | — | — | 1 | 2 | — | — | — | — | — | — | — | — | — | — | — | 5 | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | WSW 4 | — | NNW 3 | N 3 | N 3 | NNW 4 | N 3 | NNW 4 | NNW 3 | — | SSW 3 | SW 6 | NW 4 | — | SW 6 | SW 6 | WSW 7 | WSW 6 | NW 7 |
| kJ | — | — | 13 | — | 8 | 8 | 6 | 29 | 6 | 7 | 4 | — | 8 | 138 | 7 | — | 16 | 237 | 467 | 280 | 371 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 125 | 303 | 125 | 138 | 252 | 141 | 354 | 507 | 303 | 301 | 301 | 312 | 312 | 324 | 3 | 260 | 307 | 380 | 138 | 126 | 0 |
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)
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