Surf Forecasts:
Porth Ceriad surf forecast from 4 Sep 2026:
- Most powerful swell: Wednesday 9 Sep, 4AM (local time) - 6.5ft (2.0m), 6s period, W swell with 293 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 2.0m 6s and forecast to arrive on Wednesday (Sep 09) at 4AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.6m 6s period and expected on Wednesday (Sep 09) at 1PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 4AM (Wed 9th Sep) | 6.5ft (2.0m) 6s |
Table - best surf conditions forecast for Porth Ceriad over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s on the menu for Porth Ceriad over the next couple of weeks.
Right off the bat, I gotta be straight with you – this is a tough outlook. The whole 16-day window is looking pretty grim. There’s not a single session that scores well enough to get excited about. We’re looking at a long, dry spell with no real surf on offer.
The only wave energy we see is a pulse of moderate swell kicking in around Monday the 7th of September, with the combined energy hitting 195 (moderate wave energy). But here’s the kicker – the wind is absolutely howling from the SW at 25 mph, making it a strong cross-onshore mess. The water is a warm 64°F, which is much warmer than normal for this time of year, but that’s small comfort when the waves are chopped to bits.
That swell sticks around for a few days, but the wind never lets up. Tuesday the 8th of September sees a bit more size, with the swell hitting 6 ft from the WSW, but again, a strong cross-shore wind of 25 mph trashes any chance of a clean wave. The energy is up to 275 (moderate wave energy), but it’s just not surfable.
We get a brief window of clean conditions on Wednesday the 9th of September in the morning, with a cross-offshore wind from the WNW at 22 mph and a 6 ft swell from the WNW. The period is short at 6 seconds, so it’s a bumpy, windswell type wave. The energy is 272 (moderate wave energy). It looks clean, but the wave quality is still rated as poor. It might be the best of a bad lot, but it’s nothing to write home about.
After that, the swell drops off a cliff. From Thursday the 10th of September onwards, it’s tiny, weak, and mostly blown out or just flat. The rest of the period up to the 19th of September shows nothing but poor surf conditions with minimal wave heights.
For a spot like Porth Ceriad, which is a fairly consistent beginner break when it’s working, this kind of blank run is a real bummer. The setup is exposed to the SW, but the wind just hasn’t played ball. Honestly, with the strong winds and poor surf quality through the first week, the beach looks more interesting for kite surfing than paddle surfing.
Stay patient, lads. It can’t stay this bad forever.
Rusty
Short Range ForecastLight rain (total 4mm), mostly falling on Sat night. Warm (max 21°C on Sun afternoon, min 14°C on Fri night). Mainly fresh winds. | Days 5-7 Weather SummaryLight rain (total 6mm), mostly falling on Thu morning. Very mild (max 16°C on Mon afternoon, min 13°C on Tue morning). Winds decreasing (strong winds from the W on Tue night, light winds from the W by Wed afternoon). | |||||||||||||||||||
Fri 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | ||||||||||||||
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) | WSW 6 | W 5 | W 5 | WSW 6 | SSW 4 | SW 5 | SW 5 | SW 6 | SW 6 | SW 6 | WSW 7 | WSW 6 | WSW 6 | W 6 | WNW 6 | WNW 6 | WSW 7 | SW 6 | SW 6 | SW 7 |
Wave Graph  | ||||||||||||||||||||
 kJ | 143 | 120 | 51 | 22 | 10 | 20 | 57 | 92 | 52 | 195 | 234 | 275 | 230 | 258 | 272 | 0 | 5 | 155 | 132 | 86 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | cross | cross-on | on | on | on | cross-on | cross-on | cross-on | cross | cross | cross-on | cross-off | cross-off | cross | cross | cross-on | cross-on | cross |
High Tide | 2:24AM3.37m | 3:01PM3.24m | 3:49AM3.13m | 4:32PM3.23m | 5:21AM3.19m | 5:54PM3.50m | 6:32AM3.46m | 6:56PM3.92m | 7:27AM3.80m | 7:46PM4.33m | 8:12AM4.10m | 8:30PM4.65m | ||||||||
Low Tide | 8:50PM1.27m | 9:45AM1.42m | 10:41PM1.35m | 11:30AM1.41m | 00:19AM1.15m | 12:52PM1.16m | 1:31AM0.77m | 1:53PM0.82m | 2:25AM0.38m | 2:41PM0.50m | 3:11AM0.08m | 3:23PM0.27m | 3:51AM-0.09m | |||||||
 |  |  | |  | | | |  |  |  | | | | | | |  | | | |
 | — | — | 6:33 | — | — | 6:35 | — | — | 6:37 | — | — | 6:39 | — | — | 6:39 | — | — | 6:41 | — | — |
 | 8:00 | — | — | 7:58 | — | — | 7:55 | — | — | 7:52 | — | — | 7:51 | — | — | 7:49 | — | — | 7:45 | — |
mm | — | — | — | — | 3 | — | — | 1 | — | 1 | 1 | — | — | — | — | — | 1 | 3 | 3 | 1 |
Temp °C | 17 | 16 | 14 | 15 | 15 | 19 | 21 | 18 | 16 | 16 | 15 | 14 | 16 | 15 | 14 | 16 | 16 | 16 | 17 | 18 |
Feels °C | 11 | 9 | 11 | 12 | 11 | 14 | 17 | 14 | 10 | 9 | 8 | 6 | 8 | 7 | 7 | 13 | 12 | 10 | 13 | 14 |
Swell 1 Height (m) Direction Period (s) | NW 5 | SW 14 | SW 14 | NW 4 | WSW 6 | SW 5 | SW 13 | W 17 | WSW 14 | — | — | — | — | — | — | — | WSW 6 | — | — | — |
| kJ | 12 | 8 | 7 | 7 | 4 | 20 | 6 | 5 | 40 | — | — | — | — | — | — | — | 4 | — | — | — |
Swell 2 Height (m) Direction Period (s) | — | — | — | SW 13 | SW 13 | SW 13 | — | W 17 | NW 4 | — | — | — | — | — | — | — | WSW 7 | — | — | — |
| kJ | — | — | — | 7 | 7 | 7 | — | 6 | 2 | — | — | — | — | — | — | — | 5 | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | W 13 | NW 4 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | 4 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | WSW 6 | W 5 | W 5 | WSW 6 | SSW 4 | SSE 3 | SW 5 | SW 6 | SW 6 | SW 6 | WSW 7 | WSW 6 | WSW 6 | W 6 | WNW 6 | WNW 6 | W 4 | SW 6 | SW 6 | SW 7 |
| kJ | 143 | 120 | 51 | 22 | 10 | 3 | 57 | 92 | 52 | 195 | 234 | 275 | 230 | 258 | 272 | 102 | 25 | 155 | 132 | 86 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 460 | 126 | 138 | 236 | 132 | 184 | 295 | 200 | 298 | 460 | 120 | 299 | 571 | 727 | 376 | 303 | 252 | 252 | 252 | 262 |
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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