Surf Forecasts:
Porth Ceriad surf forecast from 21 Jul 2026:
- Most powerful swell: Saturday 25 Jul, 4PM (local time) - 3ft (0.9m), 4s period, WSW swell with 26 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 4s and forecast to arrive on Saturday (Jul 25) at 4PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 5s period and expected on Wednesday (Jul 22) at 4PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 4PM (Sat 25th Jul) | 3ft (0.9m) 4s |
Table - best surf conditions forecast for Porth Ceriad over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s cookin’ for the next couple of weeks.
To be straight with you, this is a tough one. We’re looking at a long stretch of next to nothing. The first real chance of a wave doesn’t show up until Wednesday the 5th of August, a full two weeks away. That’s a long, flat spell to sit through.
The only spot we’ve got data for is Porth Ceriad, and it’s an exposed, beginner-friendly break that picks up a SW swell. Right now, the water is a balmy 66°F – that’s a massive 6°F warmer than normal for this time of year, so it’s very unusual. You’ll be sweating in your wettie.
The first week is a total write-off. From the 21st to the 4th of August, it’s a sad run of zeros: flat calm, just a few tiny windswells that never break 3 ft, and often a messy wind to go with it. There’s a few days of clean offshore winds, but without any swell, that’s just cruel.
The only glimmer of hope lands on Wednesday morning, 5th of August. A small pulse of SW swell pushes in at 4 ft, with a short period of 6 seconds. The combined energy is weak (85). The wind is dead calm, turning it glassy. The wave comment says "surfable waves but very ordinary conditions", and the score is a lowly 1 out of 10. It’s not much, but it’s the only game in town. The swell direction matches the optimum (SW), and the glassy conditions will make it look better than it is. It’s tiny, weak, and inconsistent, but it’s the only wave we’ve got.
For the rest of the 16-day window, that’s it. A single, small, marginal morning. It’s not a stand-out, it’s just the only option. Hang tight, and hope the models change.
Rusty.
Short Range ForecastMostly dry. Very mild (max 18°C on Wed afternoon, min 11°C on Tue night). Winds decreasing (fresh winds from the NNW on Wed afternoon, light winds from the N by Thu night). | Days 4-6 Weather SummarySome drizzle, heaviest during Sat night. Very mild (max 18°C on Fri afternoon, min 13°C on Sun night). Winds increasing (light winds from the WNW on Fri afternoon, fresh winds from the NW by Sun morning). | ||||||||||||||||||||
Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | Saturday 25 | Sunday 26 | Monday 27 | |||||||||||||||
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) | NNW 5 | NNW 4 | W 16 | NNW 6 | NNW 5 | NNW 4 | NNW 6 | NNW 4 | N 4 | W 13 | W 13 | — | W 3 | WSW 4 | SW 5 | SW 6 | WSW 4 | SW 6 | WSW 6 | WSW 6 | NW 4 |
Wave Graph  | |||||||||||||||||||||
 kJ | 0 | 0 | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 3 | 0 | 3 | 26 | 15 | 15 | 7 | 8 | 3 | 3 | 3 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | off | off | off | off | cross-off | off | cross-off | cross-off | cross-off | cross | cross | cross-on | cross-off | cross-off | cross-off | cross-on | on | glassy |
High Tide | 2:07PM3.31m | 2:32AM3.43m | 3:07PM3.10m | 3:38AM3.13m | 4:19PM2.98m | 4:54AM2.99m | 5:31PM3.01m | 6:03AM3.01m | 6:32PM3.16m | 6:59AM3.15m | 7:22PM3.37m | 7:44AM3.33m | 8:04PM3.61m | ||||||||
Low Tide | 8:56PM1.18m | 9:34AM1.21m | 9:49PM1.39m | 10:30AM1.41m | 11:05PM1.51m | 11:50AM1.50m | 00:39AM1.48m | 1:12PM1.43m | 1:49AM1.31m | 2:08PM1.25m | 2:38AM1.09m | 2:51PM1.04m | 3:18AM0.86m | ||||||||
 | |  |  | | | | |  | | | |  | |  | | | | | | | |
 | 5:18 | — | — | 5:20 | — | — | 5:20 | — | — | 5:22 | — | — | 5:24 | — | — | 5:26 | — | — | 5:26 | — | — |
 | — | — | 9:28 | — | — | 9:27 | — | — | 9:25 | — | — | 9:23 | — | — | 9:22 | — | — | 9:21 | — | — | 9:20 |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — |
Temp °C | 14 | 15 | 14 | 15 | 18 | 16 | 17 | 18 | 18 | 16 | 18 | 18 | 15 | 16 | 17 | 15 | 17 | 17 | 15 | 19 | 18 |
Feels °C | 10 | 11 | 10 | 12 | 13 | 12 | 14 | 14 | 15 | 15 | 17 | 16 | 11 | 15 | 16 | 10 | 14 | 13 | 12 | 16 | 19 |
Swell 1 Height (m) Direction Period (s) | — | — | W 16 | NNW 6 | — | N 6 | — | — | NNW 3 | — | — | — | — | — | SW 5 | NW 4 | WSW 4 | SW 6 | WSW 6 | WSW 6 | NW 4 |
| kJ | — | — | 5 | 4 | — | 1 | — | — | 1 | — | — | — | — | — | 15 | 2 | 7 | 8 | 3 | 3 | 3 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | W 13 | W 13 | — | — | — | — | — | SW 5 | — | — | WSW 6 | SW 5 |
| kJ | — | — | — | — | — | — | — | — | — | 3 | 3 | — | — | — | — | — | 4 | — | — | 3 | 1 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | W 5 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 |
Wind waves Height (m) Direction Period (s) | NNW 5 | NNW 4 | N 4 | NNW 6 | NNW 5 | NNW 4 | NNW 6 | NNW 4 | N 4 | — | — | — | W 3 | WSW 4 | NW 3 | SW 6 | NW 4 | NW 3 | NNW 5 | NW 5 | — |
| kJ | 9 | 25 | 23 | 66 | 74 | 17 | 24 | 24 | 3 | — | — | — | 3 | 26 | 2 | 15 | 6 | 5 | 67 | 18 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 379 | 950 | 77 | 303 | 914 | 223 | 254 | 312 | 303 | 916 | 656 | 656 | 373 | 370 | 619 | 494 | 494 | 125 | 304 | 298 | 296 |
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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