Surf Forecasts:
Porth Ceriad surf forecast from 12 Sep 2026:
- Best quality surf: Sunday 13 Sep, 4AM (local time) - 3.5ft (1.0m), 7s period, SW swell with cross-offshore winds.
- Most powerful swell: Saturday 12 Sep, 4PM (local time) - 7ft (2.1m), 7s period, SW swell with 415 kJ wave energy.
- Next surfable swell (1★+): Sunday 13 Sep, 4AM (local time) - 3.5ft (1.0m), 7s 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 Sunday (Sep 13) at 4AM. The primary swell is predicted to be 1.0m and 7s period. 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 2.1m 7s and forecast to arrive on Saturday (Sep 12) 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 1.3m 5s period and expected on Wednesday (Sep 16) at 7AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4AM (Sun 13th Sep) | 3.5ft (1.0m) 7s |
| Best Surf | 4AM (Sun 13th Sep) | 3.5ft (1.0m) 7s |
| Most Powerful | 4PM (Sat 12th Sep) | 7ft (2.1m) 7s |
Table - best surf conditions forecast for Porth Ceriad over the next 16 days.
The Lowdown
Alright mates, Rusty here with the lowdown on Porth Ceriad. Gotta be honest with ya, the start of this stretch is a bit of a drought.
We've got a promising feature hiding at the end of the two-week window, but don't expect much for a while. The water’s about 64°F, a good few degrees warmer than the fall average—feels like summer held on a bit longer.
The first chance to get wet is this Friday the 11th afternoon. It’s clean, but you’re dealing with a 2ft swell out of the WSW. Light cross-offshore breeze, but the energy is weak and the period is short, so don't get your hopes up for anything with punch. Just a little wobbler.
The weekend? Forget it. Saturday the 12th gets hammered by near-gale winds and a messy 6-7ft swell. Sunday the 13th morning cleans up with an offshore breeze, but the swell drops to about 3ft and fades fast. From the 14th all the way through the morning of the 21st, it’s a wasteland of lumpy, crossed-up wind and limp waves. Plenty of clean moments, but the swell just isn’t there to make it worth paddling out.
Then comes Monday, the 21st of September. The morning shows signs of life: clean, cross-offshore wind and a decent 6ft swell from the SW. The energy gets up there, so you’ll finally feel some push. But the real standout is that Monday afternoon. It turns clear, the wind goes light and cross-off, and the swell settles in at 5ft from the WSW. The energy is solid, the conditions lock in glassy, and it all points to this being the one session to aim for. For a beginner-friendly break like this, that afternoon is pure gold.
A bit further out, Saturday the 26th of September morning looks clean with offshore winds and a solid 5ft SW swell. The afternoon goes glassy with the same size and even more energy. That weekend two weeks out is promising, but we’ll have to see how the models hold.
Bottom line: the first week is a dud. Keep your powder dry for Monday the 21st of September, especially the afternoon. That’s your winner. Porth Ceriad can get busy on a good day, so expect some company. With that warm water hanging around, it’ll feel like a late-season gift.
Rusty, signing off.
Short Range ForecastModerate rain (total 11mm), heaviest on Sat morning. Very mild (max 19°C on Sun night, min 15°C on Fri night). Winds decreasing (strong winds from the SW on Sat morning, calm by Sun morning). | Days 4-6 Weather SummaryLight rain (total 6mm), mostly falling on Mon night. Very mild (max 18°C on Mon night, min 12°C on Tue night). Winds decreasing (strong winds from the SSW on Mon night, light winds from the W by Tue afternoon). | ||||||||||||||||||||
Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | |||||||||||||||
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 7 | SW 7 | SW 7 | SW 6 | SW 6 | SW 6 | SW 5 | SW 5 | SW 6 | SW 6 | WSW 6 | SW 6 | SW 7 | SW 6 | W 4 | W 5 | SW 6 | WNW 5 | W 4 | WSW 4 | SW 5 |
Wave Graph  | |||||||||||||||||||||
 kJ | 337 | 415 | 135 | 34 | 21 | 14 | 87 | 65 | 171 | 66 | 22 | 8 | 12 | 10 | 26 | 74 | 34 | 0 | 22 | 13 | 64 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | glassy | cross | on | cross-on | cross-on | cross-on | cross | cross-off | cross-off | cross-off | cross | cross-on | cross-off | cross-off | cross | cross | cross-on | cross-on |
High Tide | 9:33AM4.45m | 9:50PM4.85m | 10:10AM4.47m | 10:28PM4.72m | 10:46AM4.37m | 11:05PM4.46m | 11:22AM4.16m | 11:41PM4.11m | 11:57AM3.87m | 00:18AM3.70m | 12:34PM3.53m | 00:57AM3.28m | 1:15PM3.17m | 1:45AM2.89m | |||||||
Low Tide | 4:29AM-0.11m | 4:37PM0.12m | 5:03AM0.00m | 5:10PM0.20m | 5:34AM0.22m | 5:41PM0.37m | 6:02AM0.51m | 6:10PM0.60m | 6:28AM0.82m | 6:38PM0.87m | 6:53AM1.13m | 7:13PM1.16m | 7:27AM1.41m | 8:05PM1.45m | |||||||
 |  |  |  |  | |  |  |  | | | | | | | | | | | | | |
 | 6:45 | — | — | 6:47 | — | — | 6:48 | — | — | 6:50 | — | — | 6:52 | — | — | 6:54 | — | — | 6:56 | — | — |
 | — | 7:40 | — | — | 7:38 | — | — | 7:37 | — | — | 7:34 | — | — | 7:31 | — | — | 7:29 | — | — | 7:27 | — |
mm | 6 | 2 | — | — | — | — | — | 3 | 3 | — | — | — | — | — | 3 | — | — | — | — | — | — |
Temp °C | 16 | 17 | 17 | 16 | 17 | 19 | 17 | 18 | 18 | 15 | 16 | 16 | 13 | 15 | 16 | 14 | 15 | 15 | 14 | 15 | 15 |
Feels °C | 9 | 12 | 15 | 16 | 17 | 18 | 15 | 14 | 12 | 11 | 13 | 10 | 7 | 10 | 10 | 8 | 10 | 9 | 10 | 10 | 10 |
Swell 1 Height (m) Direction Period (s) | — | — | — | SW 6 | SW 6 | SW 6 | — | — | W 12 | SW 6 | WSW 6 | SW 6 | SW 7 | SW 6 | NNW 5 | W 9 | SW 6 | — | NW 4 | NW 4 | — |
| kJ | — | — | — | 34 | 21 | 14 | — | — | 3 | 66 | 22 | 8 | 12 | 10 | 2 | 2 | 34 | — | 9 | 3 | — |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | W 11 | W 11 | — | — | — | — | — | — | WSW 6 | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | 2 | 2 | — | — | — | — | — | — | 4 | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SW 7 | SW 7 | SW 7 | — | — | SSW 3 | SW 5 | SW 5 | SW 6 | — | NW 4 | NW 5 | NW 5 | NW 5 | W 4 | W 5 | NW 5 | WNW 5 | W 4 | WSW 4 | SW 5 |
| kJ | 337 | 415 | 135 | — | — | 2 | 87 | 65 | 171 | — | 5 | 54 | 103 | 34 | 26 | 74 | 28 | 40 | 22 | 13 | 64 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 236 | 267 | 335 | 290 | 0 | 107 | 132 | 252 | 252 | 246 | 292 | 556 | 292 | 141 | 303 | 638 | 1029 | 571 | 738 | 502 | 460 |
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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