
Surf Forecasts:
Porth Ceriad surf forecast from 30 Jul 2026:
- Most powerful swell: Friday 31 Jul, 10PM (local time) - 3ft (0.9m), 5s period, WSW swell with 42 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 0.9m 5s and forecast to arrive on Friday (Jul 31) at 10PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 4s period and expected on Thursday (Jul 30) at 1PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 10PM (Fri 31st Jul) | 3ft (0.9m) 5s |
Table - best surf conditions forecast for Porth Ceriad over the next 16 days.
The Lowdown
G’day, Rusty here. Look, I’ve scanned the charts for this little pocket of coast and, honestly, it’s a tough stretch ahead. We’re looking at a pretty barren run for the next couple of weeks with barely a ripple worth paddling out for.
The focus is Porth Ceriad. Don’t get your hopes up too high. This exposed spot is a beginner-friendly zone, and it's rated as fairly consistent, but what’s in the water over this 16-day window is mostly tiny and weak. The water’s sitting at a very warm 64°F – much warmer than usual for this time of year, which is a nice surprise for the skin, but it won’t make up for the lack of push.
On Thursday the 30th, we start with tiny 1 ft swell from the SW with a poor short period of 5 seconds. The energy is pathetic (6), and a moderate NNW breeze at 16 mph is blowing cross-off, so it’s clean but incredibly weak. Not worth getting wet for. It stays like this into the afternoon with even less energy (3).
Friday the 31st is a total write-off – flat with zero energy. The wind swings onshore in the afternoon, but there’s nothing to surf.
Saturday the 1st of August is the best we’re going to see in this entire period, and it’s still not great. Morning brings a tiny 1 ft SW swell with a period of 5 seconds and combined energy climbing to a still-paltry 9. The wind is a gentle cross-off from the WNW at 9 mph, keeping the surface clean. It’s really only a longboard or foiler wave, but if you’re desperate, this is your window. Afternoon sees the swell drop to 1.0 ft and the wind goes light cross-on.
Sunday the 2nd drops to 0.3 ft with an 8-second period. Morning is crossed up, but the afternoon goes clean with a gentle offshore from the NNW at 9 mph – again, barely a bump.
Monday the 3rd shows a slight pulse with 1 ft from the SW, a longer 9-second period, and energy up to 22. The afternoon clean up with a moderate offshore from the NNW at 16 mph, but it’s still ankle-high.
From Tuesday the 4th right through to Thursday the 14th of August, it’s a long, drawn-out grind of tiny swell – mostly 0.3 ft to 1 ft – with periods bouncing between 4 and 12 seconds. The energy figures are all in the single digits or low teens, which is basically nothing. There’s a little pulse of 3 ft on Sunday the 9th from the ESE, but with a short 4-second period and a cross-onshore wind, it’s just messy chop.
So, the only true standout, and it’s a weak one, is the Saturday the 1st of August morning session at Porth Ceriad. It’s got the cleanest wind and the highest (relatively speaking) energy of the whole run. But honestly, mate, I’d save the wax for another week. The last week of the outlook is flat to near-flat. It’s a long gap of poor conditions.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Fri afternoon. Very mild (max 17°C on Thu afternoon, min 13°C on Fri night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 21°C on Mon morning, min 15°C on Sun morning). Wind will be generally light. | ||||||||||||||||||||
Thursday 30 | Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | |||||||||||||||
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 5 | SW 5 | SW 4 | W 4 | WSW 3 | WSW 5 | SW 5 | SW 5 | SW 9 | WSW 4 | SW 8 | SW 10 | SW 9 | WSW 9 | WSW 8 | SW 8 | SW 7 | SW 7 | SW 7 | SW 7 | SW 7 |
Wave Graph | |||||||||||||||||||||
6 | 3 | 1 | 0 | 3 | 26 | 7 | 3 | 3 | 3 | 3 | 4 | 21 | 30 | 26 | 16 | 14 | 7 | 7 | 7 | 7 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | glassy | cross | cross-on | cross-off | cross-off | cross-on | glassy | cross | off | cross-off | cross | off | cross | cross | off | cross | cross-on | cross-off | glassy |
High Tide | 9:49PM4.25m | 10:06AM3.92m | 10:23PM4.38m | 10:40AM3.99m | 10:57PM4.42m | 11:15AM4.00m | 11:32PM4.39m | 11:53AM3.96m | 00:11AM4.27m | 12:34PM3.84m | 00:54AM4.07m | 1:20PM3.66m | 1:44AM3.80m | ||||||||
Low Tide | 4:35PM0.55m | 5:04AM0.42m | 5:09PM0.50m | 5:38AM0.39m | 5:41PM0.53m | 6:12AM0.44m | 6:13PM0.62m | 6:46AM0.54m | 6:45PM0.75m | 7:20AM0.69m | 7:17PM0.91m | 7:56AM0.87m | 7:54PM1.08m | ||||||||
5:31 | — | — | 5:33 | — | — | 5:35 | — | — | 5:37 | — | — | 5:37 | — | — | 5:39 | — | — | 5:41 | — | — | |
— | — | 9:15 | — | — | 9:13 | — | — | 9:12 | — | — | 9:09 | — | — | 9:07 | — | — | 9:06 | — | — | 9:04 | |
mm | — | — | — | — | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 17 | 16 | 14 | 16 | 17 | 14 | 15 | 15 | 17 | 19 | 18 | 21 | 21 | 20 | 19 | 20 | 20 | 17 | 19 | 18 |
Feels °C | 11 | 14 | 14 | 11 | 11 | 12 | 12 | 13 | 14 | 16 | 15 | 17 | 19 | 16 | 17 | 17 | 18 | 19 | 17 | 18 | 19 |
Swell 1 Height (m) Direction Period (s) | SW 5 | SW 5 | — | — | NW 3 | WSW 5 | SW 5 | SW 5 | WSW 4 | WSW 4 | SW 4 | SW 8 | SW 9 | WSW 9 | WSW 8 | SW 8 | SW 7 | SW 7 | SW 7 | SW 7 | NNW 4 |
6 | 3 | — | — | 2 | 26 | 7 | 3 | 2 | 2 | 1 | 3 | 21 | 30 | 26 | 16 | 14 | 7 | 7 | 7 | 3 | |
Swell 2 Height (m) Direction Period (s) | — | — | SW 4 | — | — | W 12 | W 10 | NW 4 | SW 9 | SW 8 | SW 8 | SW 10 | — | — | N 5 | — | — | — | — | WNW 3 | SW 7 |
— | — | 1 | — | — | 3 | 2 | 2 | 3 | 3 | 3 | 4 | — | — | 1 | — | — | — | — | 1 | 7 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | W 9 | — | — | — | — | — | — | — | — | — | — | — | W 13 | N 6 |
— | — | — | — | — | — | — | 2 | — | — | — | — | — | — | — | — | — | — | — | 3 | 1 | |
Wind waves Height (m) Direction Period (s) | NW 4 | NW 4 | — | W 4 | WSW 3 | — | NW 4 | — | — | — | — | NE 3 | ESE 2 | — | NE 3 | E 3 | E 3 | — | WNW 3 | — | — |
8 | 5 | — | 8 | 3 | — | 5 | — | — | — | — | 2 | 1 | — | 2 | 1 | 1 | — | 1 | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 460 | 494 | 298 | 306 | 339 | 378 | 317 | 213 | 298 | 306 | 125 | 107 | 125 | 125 | 133 | 335 | 306 | 336 | 335 | 103 | |
Best forecast wave conditions in Lleyn Peninsula | |||||||||||||||||||||
Best forecast wave conditions in United Kingdom | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)
Latest Updates
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.











