Surf Forecasts:
Porth Ceriad surf forecast from 23 Aug 2026:
- Best quality surf: Thursday 27 Aug, 10PM (local time) - 2.5ft (0.8m), 7s period, SW swell with glassy winds.
- Most powerful swell: Sunday 30 Aug, 1AM (local time) - 6ft (1.8m), 6s period, WSW swell with 229 kJ wave energy.
- Next surfable swell (1★+): Thursday 27 Aug, 10PM (local time) - 2.5ft (0.8m), 7s period with SW swell.
Best Forecast Surf Conditions for Porth Ceriad this week:
The surf forecast for Porth Ceriad over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Aug 27) at 10PM. The primary swell is predicted to be 0.8m and 7s period with a secondary swell of 0.4m and 9s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Porth Ceriad in the next 16 days are 1.8m 6s and forecast to arrive on Sunday (Aug 30) at 1AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.9m 6s period and expected on Sunday (Aug 30) at 10AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Thu 27th Aug) | 2.5ft (0.8m) 7s |
| Best Surf | 10PM (Thu 27th Aug) | 2.5ft (0.8m) 7s |
| Most Powerful | 1AM (Sun 30th Aug) | 6ft (1.8m) 6s |
Table - best surf conditions forecast for Porth Ceriad over the next 16 days.
The Lowdown
Alright, let's chew the fat on Porth Ceriad. For the first stretch, it's dead as a doornail, mate. The water’s running at 65°F when we start, which is a solid 5°F warmer than usual for this time of year.
From this Sunday, August 23rd, all the way through to the afternoon of Thursday, September 3rd, it's a proper flat spell. You're looking at waves barely scraping 1ft. The combined energy is weak, under 100. There are a few moments of glassy, clean conditions, like Wednesday afternoon and Friday morning, but with no swell, it's just a pond. It flatlines completely from the 30th of August through the 2nd of September with zero energy. A long, frustrating gap.
Things perk up a bit on Friday the 4th of September. The morning shows a 6ft swell from the WSW, with the energy jumping to 994 – moderate to strong. But the wind is a cross-onshore at 12 mph, so it'll be messy. The afternoon is a touch better with a 4ft swell and light cross-shore wind, scoring a 1, but it's still marginal.
The real one to watch is Monday the 7th of September. The morning is a solid 8ft WSW swell with 824 energy, but a near gale cross-shore wind at 34 mph makes it a kite-surfing session, not a paddle. The afternoon, though... 10ft SW swell, period 8 seconds, and the wind goes cross-offshore from the W at 31 mph, leaving it clean. The energy is a massive 1295. That's the standout, but it's deep in the forecast, so don't bank on it just yet. That size is for experts only. Porth Ceriad faces SW, which is a good match for that direction. It's a fairly consistent spot for beginners, but with that height, it's a different beast. Crowds are often here, so expect a pack.
Bottom line: the first week and a half is a waste. The best bet is that Monday afternoon, but it's a long shot. Stay tuned.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Tue night. Warm (max 25°C on Tue afternoon, min 12°C on Sun morning). Winds decreasing (fresh winds from the E on Mon night, calm by Tue morning). | Days 4-6 Weather SummaryLight rain (total 6mm), mostly falling on Fri night. Very mild (max 19°C on Wed afternoon, min 16°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | |||||||||||||||
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 14 | SW 14 | WSW 11 | WSW 10 | SW 13 | E 3 | E 3 | SW 13 | ESE 4 | SSW 8 | SSW 8 | W 12 | SW 7 | SW 8 | SW 8 | SW 7 | SW 7 | SW 7 | SW 8 | WSW 5 | WSW 6 |
Wave Graph  | |||||||||||||||||||||
 kJ | 8 | 7 | 11 | 9 | 7 | 7 | 7 | 7 | 10 | 6 | 6 | 3 | 11 | 110 | 97 | 33 | 32 | 33 | 20 | 59 | 229 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | off | cross-off | cross-on | cross-off | cross | cross | cross-off | cross | cross-on | glassy | on | on | cross-on | glassy | glassy | cross | cross | on | cross-on | cross-on |
High Tide | 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 | 9:41AM4.17m | 9:56PM4.61m | ||||||||
Low Tide | 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 | 4:34AM0.22m | 4:39PM0.34m | ||||||||
 | |  | |  |  | |  |  | | | |  | | | | | |  |  |  | |
 | 6:11 | — | — | 6:13 | — | — | 6:15 | — | — | 6:16 | — | — | 6:18 | — | — | 6:20 | — | — | 6:22 | — | — |
 | — | 8:28 | — | — | 8:25 | — | — | 8:22 | — | — | 8:21 | — | — | 8:19 | — | — | 8:16 | — | — | 8:14 | — |
mm | — | — | — | — | — | — | — | — | 2 | — | — | 1 | 2 | — | — | — | — | 3 | 2 | 6 | 6 |
Temp °C | 15 | 16 | 17 | 19 | 22 | 19 | 19 | 25 | 20 | 18 | 19 | 19 | 18 | 18 | 17 | 17 | 17 | 17 | 16 | 16 | 16 |
Feels °C | 14 | 14 | 15 | 17 | 18 | 12 | 19 | 20 | 20 | 17 | 20 | 19 | 17 | 17 | 17 | 17 | 14 | 15 | 11 | 12 | 10 |
Swell 1 Height (m) Direction Period (s) | NNW 4 | SW 14 | NNW 3 | WSW 10 | SW 9 | SW 13 | SW 13 | — | SW 8 | SSW 8 | SSW 4 | SW 7 | SW 7 | — | SW 8 | SW 7 | SW 7 | SW 7 | SW 8 | — | — |
| kJ | 2 | 7 | 1 | 9 | 3 | 7 | 7 | — | 3 | 6 | 3 | 2 | 11 | — | 97 | 33 | 32 | 33 | 20 | — | — |
Swell 2 Height (m) Direction Period (s) | SW 14 | W 9 | WSW 11 | SW 14 | SW 13 | SW 9 | SW 8 | SW 13 | SW 13 | W 12 | SSW 8 | W 12 | SW 9 | — | WSW 4 | — | W 12 | WSW 11 | — | — | — |
| kJ | 8 | 2 | 11 | 8 | 7 | 3 | 3 | 7 | 7 | 3 | 6 | 3 | 3 | — | 3 | — | 3 | 11 | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | SW 14 | — | — | — | — | SW 8 | — | — | W 12 | — | W 12 | — | — | — | — | — | — | — | — |
| kJ | — | — | 7 | — | — | — | — | 3 | — | — | 3 | — | 3 | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | NNW 2 | — | SE 3 | E 3 | E 3 | E 3 | — | ESE 4 | SE 3 | — | SSE 2 | SE 3 | SW 8 | — | — | — | — | WSW 4 | WSW 5 | WSW 6 |
| kJ | — | 1 | — | 2 | 1 | 7 | 4 | — | 10 | 5 | — | 1 | 1 | 110 | — | — | — | — | 11 | 59 | 229 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 133 | 248 | 113 | 298 | 301 | 301 | 254 | 303 | 272 | 255 | 133 | 280 | 247 | 3 | 0 | 103 | 241 | 3 | 307 | 308 | 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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