Surf Forecasts:
Porth Ceriad surf forecast from 9 Aug 2026:
- Most powerful swell: Thursday 13 Aug, 4AM (local time) - 1.5ft (0.4m), 9s period, SW swell with 19 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 0.4m 9s and forecast to arrive on Thursday (Aug 13) at 4AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 4s period and expected on Saturday (Aug 15) at 10AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 4AM (Thu 13th Aug) | 1.5ft (0.4m) 9s |
Table - best surf conditions forecast for Porth Ceriad over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s have a look at what’s on offer for Porth Ceriad over the next couple of weeks.
To be straight with you, the start of this period is pretty flat. The first proper recommendation doesn’t come around until the morning of Wednesday the 19th of August, so we’re looking at a solid gap of about ten days with nothing worth getting excited about. For a spot that’s fairly consistent, that’s a bit of a slow run, but it’s not unheard of.
Things finally kick off on Wednesday morning the 19th. The swell is showing at 6 ft from the NW, with a combined wave energy of 249 – that’s moderate, solid enough to get the blood pumping. That said, it’s a short period swell at 6 seconds, so it’ll be a bit jumbled. The wind is light from the SSW, blowing onshore, which will chop things up, so it’s not going to be clean. The wave comment calls it poor surf conditions, and honestly, for a beginner-friendly break, 6 ft is pushing the upper limit. It’s not the standout of the run.
The real bright spot lands on Thursday the 20th. The afternoon sees a pulse of 4 ft from the WSW, and the wind is fresh from the NNW, blowing offshore. That’s clean, lined-up surf. The energy is still moderate at 76, and the period is short at 5 seconds, so it’s not gonna have that groundswell grunt, but with offshore wind on an exposed break, the shape will be rideable and fun. This is your best bet for the whole outlook.
Later on, Saturday the 22nd and Sunday the 23rd of August offer glassy mornings or clean cross-off winds, but the swell is tiny – just 0.3 ft from the SW. The period is long, over 14 seconds, which is proper groundswell, but there’s no height to work with. The energy readings are low (8 to 17), so you’ll be bobbing around waiting for a ripple.
So, if you’re itching for a paddle, the afternoon of Thursday the 20th is the one to aim for. Offshore wind, clean conditions, and a little bit of push. The water temp at the start of the period was 65°, which is much warmer than normal for this time of year, so the wetsuit might feel a bit more forgiving.
Stay patient, mates. It’ll come.
- Rusty
Short Range ForecastMostly dry. Warm (max 22°C on Wed morning, min 13°C on Sun night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 24°C on Wed afternoon, min 14°C on Fri night). Winds increasing (calm on Thu morning, fresh winds from the N by Sat morning). | |||||||||||||||||||
Sun 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | ||||||||||||||
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 12 | SW 4 | SW 5 | SW 6 | SW 6 | SE 3 | SW 6 | W 11 | WSW 10 | WSW 10 | WSW 9 | SW 8 | SW 8 | WSW 5 | SW 4 | SW 5 | SW 7 | WSW 5 | WSW 7 | SW 7 |
Wave Graph  | ||||||||||||||||||||
 kJ | 6 | 9 | 10 | 5 | 6 | 2 | 2 | 3 | 10 | 9 | 16 | 17 | 14 | 19 | 5 | 3 | 9 | 3 | 5 | 2 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | off | off | off | cross-off | cross-on | cross | cross-on | cross-on | cross-off | on | glassy | cross-off | on | off | off | off | off | off | off |
High Tide | 6:03PM3.53m | 6:38AM3.60m | 7:06PM3.90m | 7:36AM3.87m | 7:59PM4.30m | 8:26AM4.13m | 8:47PM4.64m | 9:12AM4.31m | 9:31PM4.85m | 9:55AM4.39m | 10:13PM4.92m | 10:36AM4.37m | 10:55PM4.81m | |||||||
Low Tide | 1:37AM0.91m | 2:04PM0.85m | 2:37AM0.52m | 2:57PM0.55m | 3:28AM0.17m | 3:43PM0.31m | 4:13AM-0.07m | 4:24PM0.16m | 4:55AM-0.16m | 5:03PM0.12m | 5:34AM-0.10m | 5:40PM0.20m | ||||||||
 |  | | | |  | | | | |  | |  | | | | | | | | |
 | — | — | 5:50 | — | — | 5:52 | — | — | 5:52 | — | — | 5:54 | — | — | 5:56 | — | — | 5:58 | — | — |
 | 8:57 | — | — | 8:54 | — | — | 8:52 | — | — | 8:51 | — | — | 8:49 | — | — | 8:46 | — | — | 8:45 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 17 | 17 | 16 | 17 | 17 | 21 | 21 | 21 | 22 | 24 | 23 | 22 | 23 | 22 | 17 | 19 | 18 | 14 | 15 | 15 |
Feels °C | 14 | 16 | 13 | 13 | 14 | 19 | 20 | 21 | 20 | 21 | 21 | 23 | 22 | 23 | 15 | 16 | 15 | 8 | 9 | 10 |
Swell 1 Height (m) Direction Period (s) | SW 12 | SW 4 | SW 5 | SW 6 | SW 6 | SW 6 | SW 6 | — | WSW 10 | WSW 10 | WSW 9 | SW 8 | SW 8 | WSW 5 | SW 4 | SW 5 | SW 7 | WSW 5 | WSW 7 | SW 7 |
| kJ | 6 | 9 | 10 | 5 | 6 | 2 | 2 | — | 10 | 9 | 16 | 17 | 14 | 19 | 5 | 3 | 9 | 3 | 5 | 2 |
Swell 2 Height (m) Direction Period (s) | — | SW 12 | — | — | N 3 | — | — | SW 6 | SW 6 | — | SW 6 | — | SW 10 | SW 8 | SW 7 | W 7 | W 11 | SW 8 | — | — |
| kJ | — | 6 | — | — | 1 | — | — | 1 | 1 | — | 1 | — | 4 | 2 | 2 | 1 | 2 | 2 | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | W 11 | — | SW 6 | — | — | — | SW 9 | W 11 | W 8 | — | — | — | — |
| kJ | — | — | — | — | — | — | — | 3 | — | 1 | — | — | — | 3 | 2 | 1 | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SW 3 | — | NNW 3 | NNW 3 | ENE 2 | SE 3 | — | — | S 3 | W 6 | — | — | — | — | NW 3 | NW 4 | NNW 2 | NNW 4 | NNW 4 | N 4 |
| kJ | 3 | — | 2 | 4 | 1 | 1 | — | — | 1 | 3 | — | — | — | — | 2 | 11 | 2 | 20 | 20 | 9 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 494 | 303 | 303 | 306 | 254 | 319 | 329 | 133 | 113 | 132 | 125 | 125 | 277 | 138 | 138 | 308 | 138 | 325 | 549 | 325 |
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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