Surf Forecasts:
Porth Ceriad surf forecast from 21 Aug 2026:
- Best quality surf: Thursday 27 Aug, 10AM (local time) - 2.5ft (0.7m), 8s period, SW swell with glassy winds.
- Most powerful swell: Wednesday 26 Aug, 4PM (local time) - 3.5ft (1.1m), 6s period, SSW swell with 100 kJ wave energy.
- Next surfable swell (1★+): Thursday 27 Aug, 10AM (local time) - 2.5ft (0.7m), 8s period with SW 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 27) at 10AM. The primary swell is predicted to be 0.7m and 8s period. 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 1.1m 6s and forecast to arrive on Wednesday (Aug 26) at 4PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Friday (Aug 28) at 7AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10AM (Thu 27th Aug) | 2.5ft (0.7m) 8s |
| Best Surf | 10AM (Thu 27th Aug) | 2.5ft (0.7m) 8s |
| Most Powerful | 4PM (Wed 26th Aug) | 3.5ft (1.1m) 6s |
Table - best surf conditions forecast for Porth Ceriad over the next 16 days.
The Lowdown
Alright, folks, it’s Rusty here. Let’s talk about what’s coming up for Porth Ceriad. I’ve got to be straight with you—this one’s a tough watch for a while. There’s a real dry spell to start, so don’t be in a rush to get your wetsuit on.
We’re looking at a long stretch of poor surf conditions right through the end of August and into the first day of September. The first sniff of anything worth paddling out for doesn’t show up until Thursday morning, the 27th of August, and even then it’s pretty ordinary with waves around 2ft out of the southwest. The wind is glassy though, so if you’re desperate for a dribble, it’ll be clean. But honestly, it’s not much to write home about.
The real standout window begins to show promise on Wednesday the 2nd of September. That afternoon, the swell kicks up to a solid 8ft from the west-southwest, with a period of 8 seconds. The combined swell energy is strong at 753, and with a light northerly offshore breeze, it’s going to be clean. This is the one to circle. The waves are going to have some push, but at 8ft, this is only for experienced surfers—beginners should sit this one out. The swell direction from the west-southwest is a good match for the break’s preferred southwest swell, and the offshore wind means real quality. Crowds are often an issue here, so expect company.
Before that, Thursday the 3rd of September morning sees more manageable 6ft swell from the west-southwest, but with a lighter cross-off breeze and a period of 6 seconds, it’s less powerful. The combined energy is moderate at 179. It’s surfable, but nothing special.
The water temperature is sitting at 66°F, which is much warmer than normal for this time of year—over 5 degrees above average, so that’s a real treat. You’ll be comfortable in a spring suit.
So, the bottom line: the first week and a half is a washout. The best of it is that Wednesday afternoon, September 2nd, with the 8ft west-southwest swell and clean offshore wind. That’s your standout. After that, Thursday and Friday have some smaller, ordinary waves, but nothing that’ll blow your mind.
Stay patient, and keep an eye on the sky. Forecasts can change.
Rusty
Short Range ForecastLight rain (total 2mm), mostly falling on Fri morning. Very mild (max 17°C on Fri afternoon, min 13°C on Fri night). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 11mm), heaviest on Wed night. Warm (max 23°C on Mon afternoon, min 16°C on Mon morning). Winds increasing (calm on Mon afternoon, fresh winds from the SSE by Wed afternoon). | ||||||||||||||||||||
Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | |||||||||||||||
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 14 | NW 5 | W 16 | SW 15 | SW 15 | SW 15 | SW 14 | SW 14 | WSW 11 | WSW 10 | WSW 9 | ESE 3 | E 3 | ESE 4 | SW 13 | S 4 | SSW 6 | SW 8 | SW 8 | SW 8 | SW 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 7 | 14 | 7 | 9 | 9 | 8 | 8 | 7 | 13 | 9 | 8 | 7 | 8 | 16 | 7 | 14 | 100 | 55 | 60 | 35 | 17 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | off | off | off | off | off | cross-off | off | cross-off | cross | glassy | cross | cross | cross-off | cross | cross-on | cross-on | cross-on | glassy | cross-off | cross |
High Tide | 3:15PM2.85m | 4:06AM2.73m | 4:55PM2.79m | 5:42AM2.76m | 6:14PM2.97m | 6:45AM2.97m | 7:07PM3.26m | 7:28AM3.22m | 7:46PM3.59m | 8:04AM3.49m | 8:20PM3.91m | 8:37AM3.75m | 8:52PM4.21m | ||||||||
Low Tide | 10:04PM1.63m | 10:53AM1.71m | 00:05AM1.62m | 12:43PM1.59m | 1:27AM1.39m | 1:44PM1.32m | 2:15AM1.10m | 2:25PM1.03m | 2:53AM0.81m | 3:01PM0.77m | 3:27AM0.54m | 3:34PM0.55m | |||||||||
 |  |  |  | | | | | |  | |  | | |  | |  |  | | |  | |
 | 6:07 | — | — | 6:09 | — | — | 6:11 | — | — | 6:13 | — | — | 6:15 | — | — | 6:16 | — | — | 6:18 | — | — |
 | — | 8:31 | — | — | 8:30 | — | — | 8:28 | — | — | 8:25 | — | — | 8:22 | — | — | 8:21 | — | — | 8:19 | — |
mm | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 2 | 1 | 7 | — | 1 | 2 |
Temp °C | 15 | 17 | 15 | 14 | 14 | 14 | 16 | 17 | 17 | 20 | 23 | 21 | 18 | 23 | 22 | 18 | 20 | 19 | 17 | 16 | 17 |
Feels °C | 12 | 15 | 11 | 10 | 9 | 10 | 15 | 14 | 14 | 18 | 19 | 15 | 15 | 19 | 19 | 14 | 16 | 15 | 18 | 13 | 10 |
Swell 1 Height (m) Direction Period (s) | WSW 6 | NW 5 | SW 6 | SW 15 | SW 15 | SW 15 | N 4 | SW 14 | WSW 11 | WSW 10 | WSW 9 | SW 13 | SSE 4 | SW 13 | SW 8 | SW 8 | SSW 6 | SW 8 | SW 8 | SW 8 | SW 7 |
| kJ | 3 | 14 | 1 | 9 | 9 | 8 | 2 | 7 | 13 | 9 | 8 | 7 | 1 | 7 | 3 | 2 | 100 | 55 | 60 | 35 | 17 |
Swell 2 Height (m) Direction Period (s) | SW 13 | WSW 6 | SW 13 | W 6 | SW 12 | SW 12 | SW 14 | W 9 | — | SW 14 | SW 13 | SW 9 | SW 13 | SW 8 | SW 13 | W 12 | W 12 | SW 4 | — | — | W 12 |
| kJ | 7 | 3 | 7 | 1 | 6 | 6 | 8 | 2 | — | 8 | 7 | 3 | 7 | 3 | 7 | 3 | 3 | 6 | — | — | 3 |
Swell 3 Height (m) Direction Period (s) | W 14 | SW 13 | W 16 | W 6 | W 6 | W 12 | — | — | — | — | — | — | SW 8 | — | — | — | — | — | — | — | W 12 |
| kJ | 4 | 7 | 5 | 1 | 1 | 3 | — | — | — | — | — | — | 3 | — | — | — | — | — | — | — | 3 |
Wind waves Height (m) Direction Period (s) | NW 5 | — | N 4 | NNW 5 | NW 5 | NNW 5 | — | — | — | ESE 2 | — | ESE 3 | E 3 | ESE 4 | SSE 3 | S 4 | — | SSW 4 | — | — | — |
| kJ | 29 | — | 8 | 9 | 10 | 7 | — | — | — | 1 | — | 6 | 8 | 16 | 3 | 14 | — | 16 | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 138 | 308 | 200 | 125 | 308 | 133 | 130 | 270 | 113 | 298 | 301 | 189 | 319 | 295 | 284 | 307 | 132 | 107 | 0 | 336 | 350 |
Best forecast wave conditions in Lleyn Peninsula | |||||||||||||||||||||
Best forecast wave conditions in United Kingdom | |||||||||||||||||||||
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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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