Surf Forecasts:
Porth Ceriad surf forecast from 10 Aug 2026:
- Most powerful swell: Friday 14 Aug, 1AM (local time) - 2.5ft (0.8m), 5s period, WSW swell with 34 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 0.8m 5s and forecast to arrive on Friday (Aug 14) at 1AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 4s period and expected on Friday (Aug 14) at 10AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 1AM (Fri 14th Aug) | 2.5ft (0.8m) 5s |
Table - best surf conditions forecast for Porth Ceriad over the next 16 days.
The Lowdown
Right then, let’s have a look at what’s happening here. To be straight with you, this is a tough stretch for Porth Ceriad. The whole 16-day window is looking pretty flat and uninspiring. There are no proper surf options on offer at all. We’ve got day after day of tiny, weak swells, mostly with poor surf conditions, and the scores just aren't there.
Right now, on Monday the 10th, you’re looking at a tiny 1ft SW swell with a short period of 6 seconds. The wave energy is weak, only hitting 11. Wind is offshore from the north, so it’s clean, but there’s just not enough to surf. It carries on like this for days. Through Tuesday and Wednesday, the swell drops even further to 0.3ft or 0.7ft, and energy levels are in the single digits. You do get a glassy morning on Wednesday the 12th with a bit of a longer period groundswell at 10 seconds, but the height is a pathetic 0.7ft. It’s a no-go.
The water here is much warmer than normal for the time of year, sitting at 65°F, with a 5°F anomaly. That’s pretty notable for the first break we’re talking about.
The only faint glimmer comes on Tuesday the 18th. We get a morning of glassy conditions with a 3ft WSW swell. The period is short at 5 seconds, and the combined energy is still weak at 48, but it’s the biggest wave height we’ll see. The forecast says “surfable waves but very ordinary conditions.” This is a spot for beginners, and at 3ft on a fairly consistent break, it’s probably the only time you could get a little wobble in. But don’t expect much.
After that, it’s back to tiny 0.3ft leftovers for the rest of the month. There is a long-period groundswell on the 20th and 21st with periods over 13 seconds, but the height is a miserable 0.3ft. It doesn’t matter how clean the wind is when there’s no water moving.
Honestly, this is a blank run. Porth Ceriad is an exposed spot, and it tends not to stay this poor for long, so forecasts can change. But for now, there’s nothing to get excited about. Leave the board at home.
Rusty
Short Range ForecastMostly dry. Warm (max 25°C on Wed afternoon, min 14°C on Mon morning). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 21°C on Thu morning, min 15°C on Fri morning). Wind will be generally light. | ||||||||||||||||||||
Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | |||||||||||||||
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 6 | SW 6 | SW 6 | SW 6 | SW 6 | W 11 | WSW 10 | WSW 10 | WSW 9 | SW 8 | SW 8 | WSW 5 | SW 5 | SW 5 | WSW 4 | SW 5 | SW 6 | WSW 7 | SW 7 | SW 7 | SW 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 11 | 5 | 6 | 2 | 2 | 3 | 10 | 9 | 16 | 18 | 14 | 34 | 12 | 6 | 6 | 7 | 8 | 5 | 2 | 2 | 2 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | cross-off | cross-on | cross | cross-on | glassy | cross-off | glassy | on | on | on | cross-off | cross-off | off | cross-off | cross-off | off | glassy | cross-off | cross-off |
High Tide | 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 | 11:16AM4.24m | 11:35PM4.56m | ||||||||
Low Tide | 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 | 6:11AM0.09m | 6:16PM0.37m | ||||||||
 | |  |  | |  | | | | | | | | | | | | |  | | | |
 | 5:50 | — | — | 5:52 | — | — | 5:52 | — | — | 5:54 | — | — | 5:56 | — | — | 5:58 | — | — | 6:00 | — | — |
 | — | 8:54 | — | — | 8:52 | — | — | 8:51 | — | — | 8:49 | — | — | 8:46 | — | — | 8:45 | — | — | 8:43 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 17 | 16 | 21 | 21 | 21 | 23 | 25 | 25 | 21 | 21 | 18 | 16 | 17 | 17 | 17 | 18 | 16 | 16 | 17 | 16 |
Feels °C | 12 | 13 | 12 | 20 | 19 | 21 | 21 | 21 | 23 | 20 | 21 | 18 | 13 | 14 | 15 | 13 | 15 | 14 | 14 | 12 | 12 |
Swell 1 Height (m) Direction Period (s) | SW 6 | SW 6 | SW 6 | SW 6 | SW 6 | SW 6 | WSW 10 | WSW 10 | WSW 9 | SW 8 | SW 8 | WSW 5 | SW 5 | SW 5 | WSW 4 | SW 5 | SW 6 | WSW 7 | SW 7 | SW 7 | NNW 3 |
| kJ | 11 | 5 | 6 | 2 | 2 | 1 | 10 | 9 | 16 | 18 | 14 | 34 | 12 | 6 | 6 | 7 | 8 | 5 | 2 | 2 | 1 |
Swell 2 Height (m) Direction Period (s) | NNW 3 | — | N 3 | — | — | — | SW 6 | SW 6 | SW 6 | — | WSW 9 | SW 9 | W 8 | NW 4 | SW 8 | W 8 | W 8 | — | — | — | SW 7 |
| kJ | 1 | — | 1 | — | — | — | 1 | 1 | 1 | — | 9 | 3 | 1 | 2 | 2 | 1 | 1 | — | — | — | 2 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | W 11 | — | — | — | — | — | — | — | W 8 | — | — | — | — | — | — | W 7 |
| kJ | — | — | — | — | — | 3 | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | 1 |
Wind waves Height (m) Direction Period (s) | — | NNW 3 | ENE 2 | ESE 2 | — | — | SSE 2 | — | — | — | — | — | NW 4 | W 4 | — | NW 3 | NW 4 | NW 2 | NNW 3 | NW 3 | — |
| kJ | — | 4 | 1 | 1 | — | — | 1 | — | — | — | — | — | 11 | 5 | — | 2 | 12 | 1 | 1 | 2 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 303 | 306 | 254 | 321 | 329 | 113 | 113 | 130 | 125 | 126 | 303 | 138 | 139 | 308 | 113 | 125 | 306 | 153 | 303 | 306 | 317 |
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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