Surf Forecasts:
Porth Ceriad surf forecast from 7 Sep 2026:
- Most powerful swell: Tuesday 8 Sep, 1AM (local time) - 6ft (1.9m), 7s period, WSW swell with 345 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 1.9m 7s and forecast to arrive on Tuesday (Sep 08) at 1AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.5m 5s period and expected on Tuesday (Sep 08) at 7PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 1AM (Tue 8th Sep) | 6ft (1.9m) 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 the next couple of weeks. I’ll be honest with you, it’s a pretty grim outlook for Porth Ceriad. The forecast is showing a whole lot of nothing for the majority of the 16-day window. The first real sniff of anything that might be worth a look is a long way off, and even then, it’s not a done deal.
We start with a real dud on Monday the 7th. A 5ft south-west swell is pushing in, but it’s coming with a 25 mph cross-onshore wind that’s just trashing it. The water is a notable 64°F with a much warmer than normal anomaly of 4°F, but that’s about the only interesting thing here. The wave energy is weak (134), and the conditions are labelled as poor. It’s a write-off.
The whole of the first week is a bust. We get a few cleaner moments with a cross-offshore wind on Tuesday the 8th and Wednesday the 9th, but the swell is tiny—down to 2ft—and the energy is almost nothing. There’s a period of onshore winds and rain from the 10th to the 12th, which is just ugly. The 13th has a bit of a cleaner look with a 3ft west-south-west swell, but the period is a short 6 seconds, so it’ll be weak and lumpy. Honestly, the best you could hope for in this first week is a flat day with a glassy finish.
After the 14th, we enter a proper quiet spell. From the 15th through to the 21st, it’s basically flat. The swell heights are below 2ft, and the combined energy readings are in the single digits. There’s a brief moment of glassy conditions on the afternoon of the 17th, but with a 1ft south-east swell, you’re just floating, not surfing.
The only real standout in the entire forecast is a potential window on Tuesday the 22nd of September. The swell picks up to 5ft from the west-south-west with a period of 6 seconds. The combined energy hits a moderate 151. The wind is a strong cross-shore at 25 mph, which will make it messy and choppy. For a more experienced surfer, it might offer some punchy, if not clean, walls. For a beginner, at 5ft, it’s pushing the limit of what’s comfortable, and the wind will make it a fight. It’s not a classic, but it’s the only real pulse of energy we’ve got in the whole 16 days. It’s a long-range call, so keep an eye on it, but don’t clear your calendar.
So, to sum it up: a long, flat spell with one very messy, potentially punchy day right at the end of the forecast. It’s a tough run for Porth Ceriad.
Rusty
Short Range ForecastLight rain (total 5mm), mostly falling on Mon night. Very mild (max 16°C on Mon afternoon, min 13°C on Mon night). Winds decreasing (strong winds from the SW on Mon afternoon, light winds from the WSW by Wed afternoon). | Days 5-7 Weather SummaryModerate rain (total 12mm), heaviest on Sat afternoon. Very mild (max 17°C on Thu night, min 13°C on Sat night). Winds increasing (calm on Fri night, strong winds from the SSW by Sat afternoon). | |||||||||||||||||||
Mon 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | ||||||||||||||
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 5 | WSW 7 | W 5 | W 5 | WSW 6 | SW 8 | SW 8 | SW 8 | SW 4 | SW 5 | SW 7 | SW 8 | SW 8 | SW 8 | SW 7 | SW 5 | WSW 7 | WSW 6 | WSW 6 | SW 6 |
Wave Graph  | ||||||||||||||||||||
 kJ | 134 | 345 | 98 | 0 | 22 | 31 | 31 | 15 | 31 | 86 | 155 | 65 | 32 | 22 | 8 | 90 | 165 | 63 | 27 | 9 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross-off | cross-off | cross-off | cross-off | cross-on | on | on | cross-on | cross | cross-off | cross-off | cross-on | on | on | cross | cross-off | cross | on |
High Tide | 5:54PM3.50m | 6:32AM3.46m | 6:56PM3.92m | 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 | |||||||
Low Tide | 1:31AM0.77m | 1:53PM0.82m | 2:25AM0.38m | 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 | ||||||||
 |  |  | |  |  | |  | | | | | | |  |  | | | | | |
 | — | — | 6:39 | — | — | 6:39 | — | — | 6:41 | — | — | 6:43 | — | — | 6:45 | — | — | 6:47 | — | — |
 | 7:52 | — | — | 7:51 | — | — | 7:49 | — | — | 7:45 | — | — | 7:44 | — | — | 7:40 | — | — | 7:38 | — |
mm | 1 | 4 | — | — | — | — | — | — | — | 1 | 3 | — | — | — | — | 8 | — | — | — | — |
Temp °C | 16 | 15 | 14 | 16 | 15 | 13 | 14 | 15 | 16 | 16 | 17 | 14 | 15 | 14 | 15 | 16 | 17 | 14 | 14 | 16 |
Feels °C | 9 | 6 | 8 | 9 | 8 | 8 | 10 | 10 | 10 | 9 | 14 | 9 | 11 | 13 | 9 | 10 | 12 | 9 | 11 | 12 |
Swell 1 Height (m) Direction Period (s) | — | — | — | — | WSW 6 | SW 8 | NW 5 | SW 8 | SW 7 | W 8 | SW 7 | SW 8 | SW 8 | SW 8 | SW 7 | W 8 | — | WSW 6 | WSW 6 | SW 6 |
| kJ | — | — | — | — | 22 | 31 | 12 | 15 | 2 | 1 | 155 | 65 | 32 | 22 | 8 | 1 | — | 63 | 27 | 9 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | SW 9 | — | SW 8 | NNW 4 | — | — | — | — | — | NNW 4 | — | — | — | — | — | NNW 4 |
| kJ | — | — | — | — | 3 | — | 31 | 2 | — | — | — | — | — | 1 | — | — | — | — | — | 2 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SW 5 | WSW 7 | W 5 | W 5 | NW 6 | NW 5 | NW 4 | SW 3 | SW 4 | SW 5 | SW 7 | NW 4 | NW 4 | — | SSW 3 | SW 5 | WSW 7 | NW 5 | NW 4 | — |
| kJ | 134 | 345 | 98 | 88 | 124 | 43 | 4 | 3 | 31 | 86 | 97 | 16 | 11 | — | 8 | 90 | 165 | 13 | 12 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 272 | 262 | 126 | 494 | 126 | 135 | 3 | 184 | 284 | 301 | 3 | 125 | 138 | 113 | 246 | 303 | 262 | 291 | 126 | 229 |
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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