Surf Forecasts:
Porth Ceriad surf forecast from 26 Aug 2026:
- Best quality surf: Friday 28 Aug, 1PM (local time) - 3.5ft (1.0m), 6s period, SW swell with cross-offshore winds.
- Most powerful swell: Saturday 29 Aug, 10PM (local time) - 6ft (1.8m), 9s period, SW swell with 454 kJ wave energy.
- Next surfable swell (1★+): Friday 28 Aug, 1PM (local time) - 3.5ft (1.0m), 6s 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 Friday (Aug 28) at 1PM. The primary swell is predicted to be 1.0m and 6s period with a secondary swell of 0.4m and 8s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Porth Ceriad in the next 16 days are 1.8m 9s and forecast to arrive on Saturday (Aug 29) at 10PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 5s period and expected on Monday (Aug 31) at 7AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1PM (Fri 28th Aug) | 3.5ft (1.0m) 6s |
| Best Surf | 1PM (Fri 28th Aug) | 3.5ft (1.0m) 6s |
| Most Powerful | 10PM (Sat 29th Aug) | 6ft (1.8m) 9s |
Table - best surf conditions forecast for Porth Ceriad over the next 16 days.
The Lowdown
G’day, Rusty here. Let’s be straight up – if you’re after a decent wave at Porth Ceriad over the next 16 days, you’re gonna be doing a lot more waiting than surfing. There’s almost no real surf to speak of, so don’t be in a rush to paddle out.
First up, from now – Wednesday 26th August – right through to the end of the month, it’s a total write-off. We’re talking ankle-sloshers under 0.7 ft with weak energy (9–13). The wind is a mess of cross and onshore directions and there’s rain around. Nothing to even bother looking at.
Thursday 27th is just as grim – even less swell at 0.3 ft and the wind is all over the shop. The water temp anomaly is about average for this time of year, but who cares when you can’t even get wet.
Friday 28th sees a bit of life, with the swell bumping up to 4 ft from the SW, but the period is a weak 6 seconds and it’s cross-onshore at 19 mph. The combined energy is moderate at 106, but it’s lumpy and messy – definitely not one to get excited about. The size is still okay for beginners, but the quality is shithouse.
Saturday 29th is worse – onshore winds ramping up to 28 mph, 7 ft of junky SW swell, and that moderate energy jumps to 347. It’s messy, blown out, and only for the hardcore or the kite crew.
Sunday 30th through Wednesday 2nd September is more of the same – small, weak, and onshore or cross-onshore. The swell rarely tops 5 ft, and when it does, the period is short and the wind ruins it. Combined energy stays under 230 most days.
Finally, a little window appears late in the piece. On Friday 4th September morning, we get a glimpse of what could’ve been – 3 ft from the SW, with a clean offshore N wind at 9 mph. The waves are surfable but ordinary, and the energy is weak (48). It’s a beginner-friendly size and the conditions are clean, so if you’re desperate and have a foamie, it’s the best of a bad bunch.
Sunday 6th September afternoon is another potential – 5 ft from the SSE, glassy conditions with light air, and the energy is moderate (101). The period is only 5 seconds though, so it’s a bit fat and crumbly, but at least it’s clean.
Then things get ugly again – Monday 7th September brings a 10 ft SW swell with a 9-second period, but it’s onshore at 28 mph with a massive energy reading of 1332. That’s a lot of power, but it’s a horrendous, blown-out mess – only for expert kamikazes or kites. After that, it fades back to tiny, weak, and wind-affected through to the 10th.
Bottom line:
Porth Ceriad isn’t firing at all. The best you can hope for is the morning of Friday 4th September – a clean 3 ft offshore morning for the beginners, or Sunday 6th September afternoon if you want a glassy but short-period 5 ft. Everything else is a complete write-off. A blank run like this is pretty normal for the area when the wind and swell don’t line up.
Rusty.
Short Range ForecastHeavy rain (total 40mm), heaviest during Thu afternoon. Warm (max 22°C on Wed afternoon, min 16°C on Thu afternoon). Winds increasing (light winds from the NE on Wed afternoon, fresh winds from the SSW by Thu night). | Days 4-6 Weather SummaryModerate rain (total 19mm), heaviest on Fri night. Very mild (max 18°C on Sat morning, min 14°C on Sun night). Winds decreasing (strong winds from the SSW on Sat morning, light winds from the W by Sun night). | ||||||||||||||||||||
Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | |||||||||||||||
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) | SSW 8 | SSW 8 | SW 7 | SW 12 | W 12 | SSW 4 | SW 6 | SW 7 | SW 5 | SW 6 | SW 7 | SW 9 | SW 9 | SW 9 | SW 7 | SW 7 | SW 5 | SW 6 | WSW 7 | SW 7 | SW 7 |
Wave Graph | |||||||||||||||||||||
6 | 6 | 2 | 6 | 3 | 21 | 106 | 73 | 92 | 138 | 347 | 446 | 162 | 61 | 34 | 56 | 65 | 247 | 229 | 104 | 42 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | cross-off | cross | cross-on | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross | on | on | cross-off | cross-off | cross-on | cross | cross-on | cross-on | cross-on |
High Tide | 8:04AM3.49m | 8:20PM3.91m | 8:37AM3.75m | 8:52PM4.21m | 9:08AM3.98m | 9:23PM4.45m | 9:41AM4.17m | 9:56PM4.61m | 10:14AM4.29m | 10:31PM4.67m | 10:49AM4.33m | 11:07PM4.61m | 11:27AM4.26m | 11:46PM4.43m | |||||||
Low Tide | 3:01PM0.77m | 3:27AM0.54m | 3:34PM0.55m | 4:01AM0.34m | 4:07PM0.40m | 4:34AM0.22m | 4:39PM0.34m | 5:06AM0.19m | 5:11PM0.35m | 5:39AM0.26m | 5:43PM0.44m | 6:11AM0.42m | 6:15PM0.60m | ||||||||
6:16 | — | — | 6:18 | — | — | 6:20 | — | — | 6:22 | — | — | 6:22 | — | — | 6:24 | — | — | 6:26 | — | — | |
— | 8:21 | — | — | 8:19 | — | — | 8:16 | — | — | 8:14 | — | — | 8:12 | — | — | 8:09 | — | — | 8:07 | — | |
mm | — | — | — | 6 | 23 | 9 | 2 | — | 5 | 4 | 1 | — | 4 | 2 | 2 | — | 1 | — | — | — | — |
Temp °C | 20 | 22 | 22 | 17 | 17 | 16 | 17 | 18 | 17 | 18 | 18 | 16 | 16 | 17 | 16 | 14 | 17 | 17 | 16 | 17 | 17 |
Feels °C | 20 | 22 | 21 | 17 | 16 | 13 | 17 | 17 | 14 | 13 | 12 | 10 | 13 | 13 | 13 | 8 | 12 | 13 | 12 | 12 | 12 |
Swell 1 Height (m) Direction Period (s) | SSW 8 | SSW 8 | SW 7 | SW 7 | S 6 | SW 8 | SW 6 | NNW 4 | — | — | — | SW 9 | SW 9 | SW 9 | SW 7 | SW 7 | NW 4 | — | — | SW 7 | SW 7 |
6 | 6 | 2 | 2 | 1 | 9 | 106 | 4 | — | — | — | 446 | 162 | 61 | 34 | 56 | 3 | — | — | 104 | 42 | |
Swell 2 Height (m) Direction Period (s) | W 13 | — | — | SW 12 | W 12 | — | — | — | — | — | — | — | NW 4 | NNW 4 | — | — | — | — | — | NW 4 | NNW 4 |
3 | — | — | 6 | 3 | — | — | — | — | — | — | — | 4 | 2 | — | — | — | — | — | 6 | 1 | |
Swell 3 Height (m) Direction Period (s) | — | W 12 | — | — | S 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | NW 5 | W 16 |
— | 3 | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 5 | |
Wind waves Height (m) Direction Period (s) | ESE 3 | — | — | E 3 | — | SSW 4 | NW 4 | SW 7 | SW 5 | SW 6 | SW 7 | NW 3 | — | — | NNW 3 | NW 5 | SW 5 | SW 6 | WSW 7 | — | — |
4 | — | — | 1 | — | 21 | 4 | 73 | 92 | 138 | 347 | 6 | — | — | 4 | 29 | 65 | 247 | 229 | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 199 | 343 | 312 | 296 | 296 | 63 | 191 | 3 | 317 | 325 | 103 | 103 | 27 | 262 | 126 | 441 | 299 | 3 | 236 | 252 | 314 |
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.











