Surf Forecasts:
Porth Ceriad surf forecast from 24 Aug 2026:
- Most powerful swell: Friday 28 Aug, 7AM (local time) - 4ft (1.2m), 5s period, SSW swell with 61 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 1.2m 5s and forecast to arrive on Friday (Aug 28) at 7AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 5s period and expected on Saturday (Aug 29) at 10AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 7AM (Fri 28th Aug) | 4ft (1.2m) 5s |
Table - best surf conditions forecast for Porth Ceriad over the next 16 days.
The Lowdown
Alright, let’s talk about Porth Ceriad. I’m not gonna sugarcoat it – this stretch is going through a lean, frustrating patch. For the first several days, there just isn’t anything worth paddling out for. Tiny, weak, messy little lines, with the odd clean moment but nothing that would get you out of bed. From Monday the 24th through to the end of August, it’s a real struggle, with wave heights barely cracking 2ft and mostly junk wind. You’re looking at a solid week-plus of flat to poor conditions, so don’t even bother waxing up until we get past that.
Now, things start to look a little more interesting come Wednesday the 2nd of September. That morning we’ve got a pulse of swell coming in from the SW at about 7ft, with a 7-second period and the wind swinging offshore out of the north at 19 mph. That’s clean, and it’s the first real chance we’ve seen in a while. The combined energy climbs to 489 (moderate energy), so there’s some decent push behind it. This is the standout window. That afternoon stays rideable too, with 5ft and still offshore, though lighter. Porth Ceriad is an exposed spot, so it’ll catch that SW swell nicely, and with clean offshore wind, it should shape up well for a beginner-friendly wave.
The clear winner? Wednesday morning, September 2nd. Swell around 7ft from the SW, clean offshore breeze, and the water’s been running much warmer than normal for this time of year – about 65°F with a 5°F anomaly, so that’s noticeable. Just bear in mind, with swell over 7ft it might be a bit much for absolute beginners, but for anyone with a bit of time in the water, it’s the best on offer.
Thursday the 3rd of September morning is worth mentioning too – glassy conditions, a little 2ft SW swell, combined energy only 54 (weak), so it’ll be small and clean, good for a longboard or a fun cruiser session.
After that, it gets messy again. Friday the 4th and Saturday the 5th see lumpy, onshore winds and dropping energy. By Sunday the 6th, it’s back to tiny and chopped. Then we get a big, long-period pulse showing for Tuesday the 8th of September – 5ft SW swell, period up at 18 seconds, and combined energy a massive 1518, which is strong. But the wind is howling onshore from the south at 28 mph, so it’ll be a blown-out, dangerous mess. That one’s for the experts only, and even then, only if they’re feeling crazy. Not recommended for a paddle session.
So overall, the one true standout is Wednesday morning, September 2nd. Get on it if you can. The rest of the window is mostly a write-off, with small windows of clean but weak surf.
Rusty.
Short Range ForecastLight rain (total 8mm), mostly falling on Thu morning. Warm (max 22°C on Mon afternoon, min 15°C on Mon night). Winds decreasing (fresh winds from the E on Mon night, calm by Wed afternoon). | Days 5-7 Weather SummaryModerate rain (total 10mm), heaviest on Thu afternoon. Very mild (max 19°C on Fri night, min 16°C on Thu afternoon). Winds increasing (light winds from the SW on Thu afternoon, fresh winds from the SSW by Sun morning). | |||||||||||||||||||
Mon 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | ||||||||||||||
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 13 | ESE 4 | E 3 | SW 13 | ESE 4 | S 4 | SSW 8 | W 12 | W 12 | W 12 | SW 8 | SW 5 | SW 7 | SW 7 | W 5 | NW 5 | SW 4 | SW 8 | SW 8 | SW 7 |
Wave Graph | ||||||||||||||||||||
7 | 18 | 7 | 7 | 16 | 7 | 6 | 3 | 3 | 3 | 10 | 51 | 47 | 37 | 0 | 17 | 7 | 24 | 36 | 26 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross | off | cross | cross-on | glassy | cross | glassy | cross-on | cross-on | cross-on | cross | cross | cross-on | cross-on | cross-on | on | cross-on | cross |
High Tide | 7:07PM3.26m | 7:28AM3.22m | 7:46PM3.59m | 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 | |||||||
Low Tide | 2:15AM1.10m | 2:25PM1.03m | 2:53AM0.81m | 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 | ||||||||
— | — | 6:15 | — | — | 6:16 | — | — | 6:18 | — | — | 6:20 | — | — | 6:22 | — | — | 6:22 | — | — | |
8:25 | — | — | 8:22 | — | — | 8:21 | — | — | 8:19 | — | — | 8:16 | — | — | 8:14 | — | — | 8:12 | — | |
mm | — | — | — | — | — | — | 2 | 1 | 5 | 3 | — | — | — | 3 | 1 | 1 | — | 2 | 5 | 5 |
Temp °C | 22 | 19 | 18 | 22 | 20 | 18 | 19 | 19 | 18 | 17 | 17 | 16 | 17 | 19 | 16 | 17 | 18 | 18 | 17 | 16 |
Feels °C | 18 | 13 | 17 | 19 | 15 | 17 | 20 | 18 | 19 | 15 | 15 | 11 | 15 | 16 | 13 | 14 | 14 | 12 | 11 | 10 |
Swell 1 Height (m) Direction Period (s) | — | SW 13 | SW 13 | — | SW 8 | SSW 8 | SSW 3 | SW 7 | S 7 | — | SW 8 | — | SW 7 | SW 7 | — | NW 5 | SW 4 | SW 8 | SW 8 | SW 7 |
— | 7 | 7 | — | 3 | 6 | 1 | 2 | 1 | — | 10 | — | 47 | 37 | — | 13 | 7 | 24 | 36 | 26 | |
Swell 2 Height (m) Direction Period (s) | SW 9 | SW 9 | SW 8 | SW 8 | N 5 | W 13 | SSW 8 | W 12 | W 12 | S 7 | — | — | — | — | — | SW 6 | SW 5 | WSW 8 | NW 4 | NNW 5 |
3 | 3 | 3 | 3 | 2 | 3 | 6 | 3 | 3 | 1 | — | — | — | — | — | 17 | 5 | 7 | 4 | 2 | |
Swell 3 Height (m) Direction Period (s) | SW 13 | — | — | SW 13 | SW 13 | — | W 12 | — | — | W 12 | — | — | — | — | — | — | — | — | SW 4 | — |
7 | — | — | 7 | 7 | — | 3 | — | — | 3 | — | — | — | — | — | — | — | — | 1 | — | |
Wind waves Height (m) Direction Period (s) | — | ESE 4 | E 3 | — | ESE 4 | S 4 | — | NNE 2 | — | — | SSW 4 | SW 5 | SW 4 | NW 4 | W 5 | WSW 4 | NW 3 | NW 4 | — | — |
— | 18 | 6 | — | 16 | 7 | — | 1 | — | — | 5 | 51 | 7 | 12 | 46 | 3 | 5 | 12 | — | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 298 | 301 | 273 | 254 | 213 | 186 | 199 | 254 | 312 | 312 | 303 | 43 | 125 | 299 | 301 | 301 | 3 | 272 | 312 | 324 |
Best forecast wave conditions in Lleyn Peninsula | ||||||||||||||||||||
Best forecast wave conditions in United Kingdom | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
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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.











