
Surf Forecasts:
Porth Ceriad surf forecast from 5 Aug 2026:
- Most powerful swell: Wednesday 5 Aug, 1PM (local time) - 4.5ft (1.4m), 5s period, W swell with 106 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 1.4m 5s and forecast to arrive on Wednesday (Aug 05) at 1PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 5s period and expected on Thursday (Aug 06) at 4AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 1PM (Wed 5th Aug) | 4.5ft (1.4m) 5s |
Table - best surf conditions forecast for Porth Ceriad over the next 16 days.
The Lowdown
Right, let’s have a look at what’s cookin’ for Porth Ceriad. To be straight with you, the next couple of weeks are gonna be a real test of patience. There’s no surf to speak of for the first ten days. We’re talking flat spells and tiny, weak dribble from the 4th of August right through until the morning of the 14th. You’d be better off taking the dog for a walk or cleaning the wax off your boards.
Things finally start to show a pulse on Friday morning the 14th. We get a little 4ft swell rolling in from the SW with a short period of 5 seconds. The energy is weak, only 63 (combined swell energy). But the wind is glassy – dead calm – so if you’re a beginner or just desperate for a paddle, the morning session will be clean. That small, weak swell sticks around into the afternoon, picking up slightly to 4ft, with a clean cross-off breeze from the NW. Still very ordinary, but at least it’s rideable.
Then we hit a flat patch again through Saturday the 15th.
Sunday the 16th sees a little bump of 3ft from the WSW, but it’s cross-shore wind and choppy. Not worth getting wet for.
The best of the whole outlook, if you can call it that, arrives on Monday morning the 17th of August. We get a 4ft swell from the WSW with a period of 7 seconds, and the combined energy bumps up to 142 (moderate). More importantly, the wind is a clean cross-off from the NW. It’s still only surfable but very ordinary, and honestly, the standout here is that it’s the cleanest, most energetic window in the entire 16 days. For a beginner, it’s a solid option. For anyone else, it’s a low-bar highlight. The swell direction is right on the money from the SW optimum, so the break should hold shape.
After that, it fades fast into tiny, weak, and choppy conditions for the rest of the run.
Water temp is running about 4°F warmer than normal for this time of year, so it’s much warmer than usual – you won’t need the thick wetsuit.
Bottom line: there’s nothing here to get excited about. If you’re desperate, the mornings of the 14th and 17th are your only real shots, and only for a quiet, clean session on small waves. Porth Ceriad is fairly consistent normally, so this is a poor run. Forecasts can change, but right now, it’s a waiting game.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Tue night. Very mild (max 18°C on Tue afternoon, min 13°C on Wed night). Winds decreasing (fresh winds from the WNW on Wed night, calm by Thu night). | Days 5-7 Weather SummaryMostly dry. Very mild (max 18°C on Sun afternoon, min 14°C on Sun night). Wind will be generally light. | |||||||||||||||||||
Tue 4 | Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | ||||||||||||||
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 5 | W 5 | WSW 5 | W 13 | WSW 6 | SW 6 | SW 4 | SW 4 | SW 5 | WSW 4 | SSW 3 | SW 4 | WSW 5 | SW 7 | SW 7 | WSW 3 | WSW 6 | SW 6 | WSW 6 |
Wave Graph | ||||||||||||||||||||
69 | 25 | 77 | 81 | 3 | 31 | 16 | 20 | 6 | 3 | 6 | 5 | 3 | 19 | 25 | 11 | 4 | 4 | 5 | 3 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-off | cross | cross | cross-off | cross-off | cross-on | cross | on | cross-on | on | on | cross-on | on | cross-on | on | off | off | cross-off | cross-off |
High Tide | 00:54AM4.07m | 1:20PM3.66m | 1:44AM3.80m | 2:15PM3.45m | 2:46AM3.52m | 3:25PM3.28m | 4:04AM3.34m | 4:47PM3.30m | 5:27AM3.38m | 6:03PM3.53m | 6:38AM3.60m | 7:06PM3.90m | ||||||||
Low Tide | 7:17PM0.91m | 7:56AM0.87m | 7:54PM1.08m | 8:41AM1.07m | 8:50PM1.25m | 9:48AM1.25m | 10:25PM1.35m | 11:26AM1.31m | 00:15AM1.24m | 12:58PM1.15m | 1:37AM0.91m | 2:04PM0.85m | 2:37AM0.52m | |||||||
— | — | 5:41 | — | — | 5:43 | — | — | 5:45 | — | — | 5:47 | — | — | 5:48 | — | — | 5:50 | — | — | |
— | 9:06 | — | — | 9:04 | — | — | 9:02 | — | — | 9:00 | — | 8:59 | — | — | 8:57 | — | — | 8:54 | — | |
mm | — | 1 | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 18 | 18 | 15 | 16 | 16 | 14 | 15 | 17 | 16 | 16 | 15 | 16 | 17 | 16 | 17 | 18 | 18 | 15 | 16 | 16 |
Feels °C | 16 | 16 | 9 | 10 | 11 | 10 | 11 | 14 | 14 | 14 | 13 | 14 | 15 | 14 | 16 | 17 | 18 | 11 | 12 | 12 |
Swell 1 Height (m) Direction Period (s) | — | SW 5 | — | NW 5 | W 13 | WSW 6 | NNW 5 | NNW 4 | SW 4 | SW 5 | SW 12 | SW 11 | SW 9 | SW 7 | SW 7 | SW 7 | WSW 3 | WSW 4 | NW 4 | WSW 6 |
— | 25 | — | 25 | 3 | 31 | 17 | 2 | 4 | 3 | 5 | 5 | 3 | 14 | 25 | 11 | 3 | 1 | 4 | 3 | |
Swell 2 Height (m) Direction Period (s) | — | SW 7 | — | — | — | W 13 | SW 6 | SW 12 | NW 3 | — | W 12 | — | — | WSW 8 | — | NW 3 | WSW 6 | WSW 6 | SW 6 | — |
— | 21 | — | — | — | 3 | 16 | 6 | 2 | — | 3 | — | — | 6 | — | 2 | 4 | 4 | 5 | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | W 12 | — | SW 12 | W 12 | — | — | — | — | — | W 12 | — | — | — | W 6 |
— | — | — | — | — | — | 3 | — | 6 | 3 | — | — | — | — | — | 3 | — | — | — | 1 | |
Wind waves Height (m) Direction Period (s) | SW 7 | — | W 5 | WSW 5 | W 5 | NW 6 | W 4 | SW 4 | — | — | WSW 4 | SSW 3 | SW 4 | WSW 5 | NW 4 | — | W 3 | NW 4 | — | — |
69 | — | 77 | 81 | 67 | 50 | 14 | 20 | — | — | 6 | 4 | 3 | 19 | 4 | — | 3 | 6 | — | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 307 | 143 | 550 | 460 | 333 | 318 | 303 | 314 | 317 | 289 | 298 | 298 | 298 | 213 | 354 | 339 | 317 | 306 | 411 | 298 |
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.











