Surf Forecasts:
Porth Ceriad surf forecast from 3 Sep 2026:
- Most powerful swell: Tuesday 8 Sep, 4AM (local time) - 7ft (2.2m), 7s period, WSW swell with 396 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 2.2m 7s and forecast to arrive on Tuesday (Sep 08) at 4AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 4s period and expected on Thursday (Sep 10) at 7PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 4AM (Tue 8th Sep) | 7ft (2.2m) 7s |
Table - best surf conditions forecast for Porth Ceriad over the next 16 days.
The Lowdown
Right then, let’s have a look at what’s on offer for Porth Ceriad.
Honestly, it’s a pretty grim outlook for the next couple of weeks. We’ve got a long stretch of nothing worthwhile, with the first real chance of a surf not coming until Sunday the 13th of September. From now until then, the wind is all over the shop, mostly howling from the south-west, and the swell is either too small, too weak, or just messy. The water is much warmer than normal for this time of year at 64°, more than two degrees above average, which is notable.
The only decent window pops up on Sunday the 13th. The morning starts off glassy, with a 5ft swell from the south-west, but the energy is weak (155). It’s surfable, but nothing to write home about. The real standout is the afternoon of the 13th. We get a clean 7ft south-west swell (347 combined energy) with a light cross-offshore breeze from the north-west. That’s the best conditions we’ll see for the whole 16 days. The wave period is a short 7 seconds, so it’ll be a bit lumpy, but for Porth Ceriad, that’s as good as it gets. That swell is pushing 7ft, so it’s getting into the zone where it’s a bit much for beginners, but it’s still a solid, fun size for those with some experience. Crowds are often an issue here, so expect company.
Monday the 14th still has a clean 3ft swell in the morning with a light offshore, but it’s small and ordinary. After that, it fades right back down to nothing.
So, if you’re hanging for a wave, pencil in the afternoon of Sunday the 13th. It’s the only true highlight on the board.
Rusty.
Short Range ForecastModerate rain (total 18mm), heaviest on Thu night. Very mild (max 19°C on Sun morning, min 14°C on Fri night). Winds decreasing (strong winds from the SW on Thu afternoon, light winds from the WSW by Sat morning). | Days 5-7 Weather SummaryModerate rain (total 15mm), heaviest on Mon night. Warm (max 21°C on Sun afternoon, min 13°C on Mon night). Winds increasing (light winds from the S on Sun afternoon, strong winds from the W by Tue night). | |||||||||||||||||||
Thu 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | ||||||||||||||
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 6 | SW 6 | WSW 8 | WSW 6 | W 5 | SW 6 | WSW 6 | SW 4 | SSW 5 | SSW 5 | SW 6 | WSW 5 | SW 5 | WSW 6 | W 6 | WSW 6 | WSW 6 | WSW 6 | SW 6 | SW 7 |
Wave Graph  | ||||||||||||||||||||
 kJ | 169 | 190 | 310 | 138 | 120 | 35 | 22 | 14 | 19 | 45 | 124 | 77 | 119 | 239 | 308 | 239 | 282 | 192 | 202 | 178 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross | cross | cross-off | cross-on | cross-on | on | cross-on | on | on | cross-off | cross-on | cross | cross | cross | cross | cross | cross-on | on |
High Tide | 1:20AM3.76m | 1:48PM3.50m | 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 | ||||||||
Low Tide | 7:31PM1.04m | 8:15AM1.21m | 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 | |||||||
 |  |  |  |  | | |  | | | | | | | | |  | | |  | |
 | — | — | 6:31 | — | — | 6:33 | — | — | 6:35 | — | — | 6:37 | — | — | 6:39 | — | — | 6:39 | — | — |
 | 8:02 | — | — | 8:00 | — | — | 7:58 | — | — | 7:55 | — | — | 7:52 | — | — | 7:51 | — | — | 7:49 | — |
mm | — | 14 | — | — | — | — | — | 4 | — | — | 1 | — | — | 14 | — | — | — | — | — | 6 |
Temp °C | 17 | 17 | 15 | 17 | 16 | 14 | 15 | 15 | 19 | 21 | 17 | 15 | 16 | 15 | 14 | 15 | 14 | 15 | 16 | 15 |
Feels °C | 12 | 11 | 8 | 10 | 9 | 12 | 12 | 11 | 15 | 18 | 13 | 11 | 10 | 7 | 7 | 7 | 4 | 7 | 11 | 10 |
Swell 1 Height (m) Direction Period (s) | — | — | — | NW 5 | — | SW 6 | NW 4 | WSW 6 | SW 13 | SW 13 | W 12 | — | — | — | — | NW 5 | — | — | NW 5 | — |
| kJ | — | — | — | 12 | — | 35 | 7 | 4 | 7 | 6 | 3 | — | — | — | — | 14 | — | — | 8 | — |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | NW 5 | SW 13 | SW 13 | W 13 | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | 24 | 7 | 7 | 3 | — | — | — | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | SW 14 | SW 13 | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | 7 | 7 | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SW 6 | SW 6 | WSW 8 | WSW 6 | W 5 | — | WSW 6 | SW 4 | SSW 5 | SSW 5 | SW 6 | WSW 5 | SW 5 | WSW 6 | W 6 | WSW 6 | WSW 6 | WSW 6 | SW 6 | SW 7 |
| kJ | 169 | 190 | 310 | 138 | 120 | — | 22 | 14 | 19 | 45 | 124 | 77 | 119 | 239 | 308 | 239 | 282 | 192 | 202 | 178 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 252 | 317 | 3 | 253 | 494 | 126 | 3 | 252 | 125 | 184 | 134 | 229 | 3 | 332 | 120 | 494 | 460 | 126 | 295 | 252 |
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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