Surf Forecasts:
Porth Ceriad surf forecast from 23 Aug 2026:
- Most powerful swell: Sunday 30 Aug, 4AM (local time) - 7.5ft (2.3m), 7s period, WSW swell with 530 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 2.3m 7s and forecast to arrive on Sunday (Aug 30) at 4AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 4s period and expected on Friday (Aug 28) at 10PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 4AM (Sun 30th Aug) | 7.5ft (2.3m) 7s |
Table - best surf conditions forecast for Porth Ceriad over the next 16 days.
The Lowdown
Alright, let’s take a look at what’s cooking. It’s a slow start, no doubt about it. The first week is basically a write-off, with flat, tiny waves and shifty winds. You’ll be waiting a while.
Now, on Thursday, August 29th, we get a pulse. It’s a 7ft swell from the WSW, with a short, choppy period of 6-7 seconds. The combined energy is moderate (292-381). The cross-shore wind is going to make it a lumpy, bumpy mess. For a beach break, that’s not going to be pretty. Honestly, this is more of a kite-surfing setup than a paddle-surfing one. It’s over 8ft, so experts only.
Then, on Tuesday, September 3rd, we get the biggest pulse of the whole run: a 8ft swell from the SW, with a period of 7 seconds and combined energy hitting 529. It’s got a gentle cross-onshore breeze, so it’ll be a bit messy, but the size is there. Again, this is well over 8ft, so it’s strictly for the experienced crew. The short period will make it dumpy and fast.
After that, it’s back to small, messy, or onshore conditions for the rest of the run. A couple of small clean windows pop up, but nothing that’ll get you out of bed.
So, bottom line: beginners, give it a miss. For the experts, the only real windows are the big, lumpy, short-period swells on the 29th of August and the 3rd of September. Not a classic, but it’s all we’ve got.
Rusty.
Short Range ForecastMostly dry. Warm (max 21°C on Mon afternoon, min 12°C on Sat night). Winds increasing (light winds from the NNW on Sun morning, fresh winds from the E by Mon night). | Days 4-6 Weather SummaryHeavy rain (total 21mm), heaviest during Wed night. Warm (max 21°C on Wed afternoon, min 16°C on Wed 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 | E 3 | SSW 8 | SSW 8 | SSW 7 | SW 7 | SSW 8 | SW 9 | SW 8 | SW 9 | WSW 8 | WSW 6 | SW 7 | WSW 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 8 | 7 | 11 | 9 | 7 | 7 | 7 | 7 | 7 | 6 | 6 | 5 | 16 | 76 | 115 | 102 | 88 | 187 | 292 | 381 | 494 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | off | cross-off | cross-on | off | cross | cross | cross-on | cross | cross-on | cross-off | cross-on | cross-on | cross-on | on | on | cross-on | cross-off | cross | cross | cross |
High Tide | 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 | 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 | — | — | — | — | — | — | — | — | — | — | 1 | 11 | 6 | 1 | 2 | — | — | 3 | — | 2 | 1 |
Temp °C | 15 | 16 | 17 | 19 | 21 | 20 | 19 | 21 | 19 | 19 | 21 | 20 | 19 | 19 | 17 | 16 | 17 | 17 | 16 | 18 | 16 |
Feels °C | 14 | 14 | 15 | 17 | 18 | 14 | 17 | 16 | 16 | 18 | 20 | 20 | 17 | 16 | 15 | 15 | 15 | 14 | 10 | 13 | 10 |
Swell 1 Height (m) Direction Period (s) | NNW 4 | SW 14 | NNW 3 | WSW 10 | SW 9 | SW 13 | SW 13 | SW 13 | SW 8 | SSW 8 | SSW 8 | SSW 4 | SW 7 | — | SW 9 | SW 8 | SW 9 | — | — | — | — |
| kJ | 2 | 7 | 1 | 9 | 3 | 7 | 7 | 7 | 3 | 6 | 6 | 2 | 16 | — | 115 | 102 | 88 | — | — | — | — |
Swell 2 Height (m) Direction Period (s) | SW 14 | W 9 | WSW 11 | SW 14 | SW 13 | SW 9 | SW 8 | SW 8 | SW 13 | W 12 | S 5 | SSW 7 | W 12 | — | SW 9 | — | — | — | — | — | — |
| kJ | 8 | 2 | 11 | 8 | 7 | 3 | 3 | 3 | 7 | 3 | 2 | 5 | 3 | — | 21 | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | W 9 | — | SW 14 | — | — | — | — | — | — | — | W 12 | W 12 | — | — | — | — | — | — | — | — | — |
| kJ | 2 | — | 7 | — | — | — | — | — | — | — | 3 | 3 | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | NNW 2 | — | SE 3 | — | E 3 | E 3 | E 3 | E 3 | SE 3 | — | — | SE 2 | SSW 8 | SSE 3 | — | SSW 3 | WSW 8 | WSW 6 | SW 7 | WSW 7 |
| kJ | — | 1 | — | 1 | — | 5 | 6 | 1 | 6 | 2 | — | — | 1 | 76 | 1 | — | 5 | 187 | 292 | 381 | 494 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 113 | 189 | 113 | 298 | 301 | 273 | 254 | 293 | 253 | 255 | 303 | 287 | 247 | 267 | 103 | 103 | 3 | 120 | 317 | 320 | 460 |
Best forecast wave conditions in Lleyn Peninsula | |||||||||||||||||||||
Best forecast wave conditions in United Kingdom | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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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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