
Surf Forecasts:
Porth Ceriad surf forecast from 9 Sep 2026:
- Best quality surf: Wednesday 9 Sep, 4PM (local time) - 1.5ft (0.5m), 8s period, WSW swell with cross-offshore winds.
- Most powerful swell: Thursday 10 Sep, 7PM (local time) - 7ft (2.1m), 7s period, SW swell with 428 kJ wave energy.
- Next surfable swell (1★+): Wednesday 9 Sep, 4PM (local time) - 1.5ft (0.5m), 8s period with WSW 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 Wednesday (Sep 09) at 4PM. The primary swell is predicted to be 0.5m and 8s 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 2.1m 7s and forecast to arrive on Thursday (Sep 10) at 7PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 6s period and expected on Wednesday (Sep 09) at 7AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4PM (Wed 9th Sep) | 1.5ft (0.5m) 8s |
| Best Surf | 4PM (Wed 9th Sep) | 1.5ft (0.5m) 8s |
| Most Powerful | 7PM (Thu 10th Sep) | 7ft (2.1m) 7s |
Table - best surf conditions forecast for Porth Ceriad over the next 16 days.
The Lowdown
Alright, grab your wettie and listen up. It's Rusty here, and I've got the lowdown on Porth Ceriad. To be honest, the next couple of weeks are looking pretty grim, so let's not sugar-coat it. We're looking at a stretch of mostly poor surf, with only a couple of fleeting moments that might get your heart rate up.
The first real chance to even think about a paddle comes Wednesday the 9th. It’s not much, but the morning has a clean 2ft of SW swell with a light cross-off breeze. The energy is weak, but it’s surfable. The afternoon is similar, 2ft, a little cleaner, but still pretty ordinary.
Then the ocean gets angry. Thursday the 10th sees the wind swing onshore and strengthen, with a stormy 4ft of wind swell on the morning. The afternoon jumps up to a messy 7ft, but with strong cross-onshore winds, it’s going to be a washing machine. That’s too big for the beginners and junky for everyone else. Definitely not worth it.
Friday the 11th backs off a little back to 2ft in the morning, but the wind is up again. The afternoon glass is off a touch with 2ft on offer and a light breeze, but the damage is done. Still just a very ordinary day.
Saturday the 12th is another write-off. The wind howls onshore again, and we get another 7ft of stormy slop. Don't even bother. The surf is blown out and messy.
Sunday the 13th will see the swell drop out completely. The morning is a tiny 2ft, but the real tease is the afternoon. The wind goes glassy and the swell drops to a knee-high 1ft. It’s clean, but it’s desperate. There’s just nothing to push you around.
The whole of the second week is pretty quiet. We see small, weak swells from Monday the 14th through to Friday the 18th, but the winds keep messing things up. There’s a couple of clean moments on the 18th with NW cross-off winds and 2-2ft on offer, but the energy is just pitiful.
The only other point worth a mention is Saturday the 19th, where we see a whisper of a long-period groundswell (16 seconds) but only 0.3ft. The period is there, but there’s no size to back it up. It’s a flat, glassy day.
Honestly, the best on offer is that clean, glassy 1ft on Sunday the 13th if you’re desperate for a log, or maybe the clean, small 2-2ft on the Friday the 18th. But even then, you’re fighting for a ripple. With most of the period blown out or flat, and this being an exposed spot, it might be a better fortnight to get the kite out than the surfboard.
Keep an eye on the charts, because it usually doesn't stay this poor for long. Hang tight.
Rusty.
Short Range ForecastLight rain (total 5mm), mostly falling on Thu afternoon. Very mild (max 17°C on Thu night, min 13°C on Wed morning). Winds decreasing (strong winds from the SSW on Thu morning, calm by Fri afternoon). | Days 4-6 Weather SummaryLight rain (total 3mm), mostly falling on Fri night. Very mild (max 19°C on Mon afternoon, min 13°C on Sat night). Winds decreasing (strong winds from the SSW on Sat morning, calm by Sun afternoon). | ||||||||||||||||||||
Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | |||||||||||||||
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 8 | WSW 8 | SW 8 | SW 5 | SW 7 | WSW 8 | SW 8 | SW 8 | SW 8 | SW 7 | SW 7 | SW 7 | SW 7 | SW 7 | SW 6 | SSW 5 | SW 5 | SW 6 | SW 5 | SSW 4 | SSW 6 |
Wave Graph | |||||||||||||||||||||
31 | 36 | 15 | 84 | 386 | 153 | 67 | 53 | 50 | 347 | 342 | 71 | 23 | 15 | 6 | 27 | 49 | 80 | 22 | 13 | 100 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | on | on | cross-on | cross | cross-off | cross-off | on | cross-on | cross-on | cross-off | cross-off | glassy | on | on | cross-on | cross-on | cross-on | cross-on | cross |
High Tide | 7:27AM3.80m | 7:46PM4.33m | 8:12AM4.10m | 8:30PM4.65m | 8:54AM4.33m | 9:11PM4.83m | 9:33AM4.45m | 9:50PM4.85m | 10:10AM4.47m | 10:28PM4.72m | 10:46AM4.37m | 11:05PM4.46m | 11:22AM4.16m | 11:41PM4.11m | |||||||
Low Tide | 2:41PM0.50m | 3:11AM0.08m | 3:23PM0.27m | 3:51AM-0.09m | 4:02PM0.14m | 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 | ||||||||
6:39 | — | — | 6:41 | — | — | 6:43 | — | — | 6:45 | — | — | 6:47 | — | — | 6:48 | — | — | 6:50 | — | — | |
— | 7:49 | — | — | 7:45 | — | — | 7:44 | — | — | 7:40 | — | — | 7:38 | — | — | 7:37 | — | — | 7:34 | — | |
mm | — | — | — | 1 | 4 | — | — | — | 1 | 2 | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 14 | 14 | 15 | 16 | 16 | 17 | 14 | 14 | 16 | 17 | 18 | 15 | 13 | 14 | 14 | 17 | 19 | 18 | 18 | 18 | 19 |
Feels °C | 9 | 11 | 10 | 10 | 9 | 14 | 10 | 12 | 9 | 11 | 12 | 10 | 10 | 13 | 12 | 16 | 19 | 18 | 16 | 18 | 18 |
Swell 1 Height (m) Direction Period (s) | SW 8 | SW 8 | SW 8 | SW 8 | — | WSW 8 | SW 8 | SW 8 | — | — | — | SW 7 | SW 7 | SW 7 | SW 6 | W 8 | — | W 12 | — | — | W 11 |
31 | 22 | 15 | 2 | — | 153 | 67 | 53 | — | — | — | 71 | 23 | 15 | 6 | 1 | — | 3 | — | — | 2 | |
Swell 2 Height (m) Direction Period (s) | — | WSW 8 | NNW 4 | — | — | — | NW 4 | NW 4 | — | — | — | — | — | — | SW 8 | — | — | — | — | — | — |
— | 36 | 2 | — | — | — | 2 | 4 | — | — | — | — | — | — | 2 | — | — | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | NW 4 | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | NW 6 | NW 5 | SW 4 | SW 5 | SW 7 | — | NW 4 | — | SW 8 | SW 7 | SW 7 | NW 4 | NW 4 | NW 4 | SSW 2 | SSW 5 | SW 5 | SW 6 | SW 5 | SSW 4 | SSW 6 |
69 | 25 | 10 | 84 | 386 | — | 3 | — | 50 | 347 | 342 | 29 | 21 | 5 | 1 | 27 | 49 | 80 | 22 | 13 | 100 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 126 | 0 | 140 | 363 | 427 | 3 | 126 | 0 | 184 | 298 | 521 | 126 | 125 | 107 | 125 | 153 | 252 | 229 | 229 | 239 | 5 |
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.










