Surf Forecasts:
Porth Ceriad surf forecast from 22 Aug 2026:
- Most powerful swell: Friday 28 Aug, 7AM (local time) - 6ft (1.8m), 7s period, SW swell with 349 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 1.8m 7s and forecast to arrive on Friday (Aug 28) at 7AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 5s period and expected on Friday (Aug 28) at 7PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 7AM (Fri 28th Aug) | 6ft (1.8m) 7s |
Table - best surf conditions forecast for Porth Ceriad over the next 16 days.
The Lowdown
G’day, Rusty here. Look, I’ve got to be straight with you – we’ve got a proper dry spell coming up for Porth Ceriad. The 16-day outlook is a tough one, with barely anything worth paddling out for. There’s a big blank run from now until the very end of the window. The water temp at the start is sitting at 66°F, which is a whopping 6°F warmer than usual for this time of year – that’s very unusual, almost like the sea has forgotten what season it is.
Right, let’s walk through it. The whole first week from Saturday the 22nd of August right through to Monday the 31st of August is a write-off. Day after day of tiny, wind-affected drivel. Swells are puny, often around 0.3ft to 0.7ft with poor wind directions. The energy is pathetic, mostly under 25. There are some glassy moments on Wednesday the 26th afternoon, but with a 0.7ft swell from the SSW, it’s just a flat, oily lake – no push. Thursday the 27th gets a little bump in size to 3ft in the morning, but that’s with a fresh cross-onshore wind from the SSE at 19 mph turning it into a lumpy mess. By the afternoon, the swell hits 5ft from the SW and energy climbs to 200, but the wind is still cross-onshore and the conditions are poor. Friday the 28th sees the biggest swell of the whole stretch at 7ft from the WSW with energy at 312 – but it’s cross-onshore again, so you’re looking at choppy, gutless walls. That size is getting into expert-only territory, but honestly, with the wind, it’s not worth it.
We then hit another gap of flat, poor conditions right through to Tuesday the 1st of September. Finally, on Wednesday the 2nd of September, there’s a glimmer. The morning shows 4ft from the SW with a 5-second period and light offshore from the ENE at 6 mph. The energy is just 54, but the winds are clean. This is the only session in the entire outlook where you might get a few weak, crumbly ones. It’s surfable, but just barely. The afternoon gets a bit taller at 5ft and energy at 102, but the wind goes cross-off from the NW, still clean, but the period is still short at 5 seconds – weak, fat waves. Thursday the 3rd has a 5ft swell from the SW (energy 176) but with light cross-shore winds, making it a messy, bumpy ride. After that, it fades back to tiny junk for the rest of the window.
So, if you’re desperate, the only true standout – if you can even call it that – is the Wednesday the 2nd of September morning at Porth Ceriad. It’s clean, has a bit of waist-high swell, and the winds are light offshore. It’s inconsistent and small, but it’s the best on offer. The rest? Save your petrol.
Rusty.
Short Range ForecastMostly dry. Warm (max 22°C on Mon afternoon, min 12°C on Sat night). Winds increasing (light winds from the NNW on Sun morning, fresh winds from the ESE by Mon night). | Days 4-6 Weather SummaryLight rain (total 9mm), mostly falling on Wed night. Warm (max 23°C on Tue afternoon, min 16°C on Tue morning). Winds increasing (calm on Wed afternoon, fresh winds from the S by Wed night). | ||||||||||||||||||||
Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | |||||||||||||||
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 15 | SW 15 | SW 15 | SW 14 | SW 14 | WSW 11 | WSW 10 | SW 13 | E 3 | ESE 4 | ESE 4 | ESE 3 | SSW 8 | SSW 8 | SSW 7 | SSW 4 | SW 7 | SSW 6 | WSW 6 | WSW 7 | W 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 9 | 9 | 8 | 8 | 7 | 11 | 9 | 7 | 7 | 10 | 7 | 7 | 6 | 6 | 5 | 20 | 200 | 176 | 312 | 295 | 221 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | cross-off | cross-off | cross-off | cross-on | cross-off | cross | cross | off | cross | cross-on | glassy | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-off |
High Tide | 4:55PM2.79m | 5:42AM2.76m | 6:14PM2.97m | 6:45AM2.97m | 7:07PM3.26m | 7:28AM3.22m | 7:46PM3.59m | 8:04AM3.49m | 8:20PM3.91m | 8:37AM3.75m | 8:52PM4.21m | 9:08AM3.98m | 9:23PM4.45m | ||||||||
Low Tide | 10:53AM1.71m | 00:05AM1.62m | 12:43PM1.59m | 1:27AM1.39m | 1:44PM1.32m | 2:15AM1.10m | 2:25PM1.03m | 2:53AM0.81m | 3:01PM0.77m | 3:27AM0.54m | 3:34PM0.55m | 4:01AM0.34m | 4:07PM0.40m | ||||||||
 |  |  | | | |  | |  | | | | | |  |  | |  | | | | |
 | 6:09 | — | — | 6:11 | — | — | 6:13 | — | — | 6:15 | — | — | 6:16 | — | — | 6:18 | — | — | 6:20 | — | — |
 | — | 8:30 | — | — | 8:28 | — | — | 8:25 | — | — | 8:22 | — | — | 8:21 | — | — | 8:19 | — | — | 8:16 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 6 | 2 | — | 1 | — | — | 1 |
Temp °C | 14 | 15 | 14 | 15 | 16 | 17 | 19 | 22 | 20 | 20 | 23 | 21 | 19 | 21 | 20 | 18 | 19 | 18 | 16 | 18 | 17 |
Feels °C | 10 | 10 | 9 | 14 | 14 | 15 | 17 | 18 | 14 | 17 | 21 | 15 | 19 | 21 | 19 | 14 | 17 | 17 | 15 | 15 | 13 |
Swell 1 Height (m) Direction Period (s) | SW 15 | SW 15 | SW 15 | NNW 5 | SW 14 | NNW 3 | WSW 10 | SW 9 | SW 13 | SW 13 | SW 8 | SW 8 | SSW 8 | SSW 4 | SSW 7 | SW 9 | — | — | — | — | — |
| kJ | 9 | 9 | 8 | 2 | 7 | 1 | 9 | 3 | 7 | 7 | 3 | 3 | 6 | 1 | 5 | 3 | — | — | — | — | — |
Swell 2 Height (m) Direction Period (s) | W 6 | SW 12 | SW 12 | SW 14 | W 9 | WSW 11 | SW 14 | — | SW 9 | SW 8 | SW 13 | SW 13 | W 12 | SSW 8 | SW 4 | — | — | — | — | — | — |
| kJ | 1 | 6 | 6 | 8 | 2 | 11 | 8 | — | 3 | 3 | 7 | 7 | 3 | 6 | 1 | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | W 6 | W 5 | W 12 | W 9 | — | SW 14 | W 14 | SW 13 | — | — | — | — | — | W 12 | W 12 | — | — | — | — | — | — |
| kJ | 1 | 1 | 3 | 2 | — | 7 | 4 | 7 | — | — | — | — | — | 3 | 3 | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | NNW 5 | NNW 4 | NNW 3 | — | NNW 2 | — | SE 3 | E 3 | E 3 | ESE 4 | ESE 4 | ESE 3 | S 3 | — | ESE 2 | SSW 4 | SW 7 | SSW 6 | WSW 6 | WSW 7 | W 8 |
| kJ | 10 | 11 | 4 | — | 1 | — | 4 | 1 | 5 | 10 | 7 | 7 | 6 | — | 1 | 20 | 200 | 176 | 312 | 295 | 221 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 133 | 308 | 133 | 254 | 189 | 113 | 298 | 301 | 295 | 315 | 268 | 213 | 189 | 213 | 189 | 189 | 307 | 27 | 3 | 120 | 307 |
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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