Surf Forecasts:
Porth Ceriad surf forecast from 6 Aug 2026:
- Best quality surf: Thursday 13 Aug, 7AM (local time) - 2.5ft (0.7m), 8s period, SW swell with cross-offshore winds.
- Most powerful swell: Thursday 13 Aug, 1PM (local time) - 2ft (0.6m), 10s period, SW swell with 76 kJ wave energy.
- Next surfable swell (1★+): Thursday 13 Aug, 7AM (local time) - 2.5ft (0.7m), 8s 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 13) at 7AM. The primary swell is predicted to be 0.7m and 8s period with a secondary swell of 0.3m and 8s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Porth Ceriad in the next 16 days are 0.6m 10s and forecast to arrive on Thursday (Aug 13) at 1PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 4s period and expected on Thursday (Aug 06) at 7PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Thu 13th Aug) | 2.5ft (0.7m) 8s |
| Best Surf | 7AM (Thu 13th Aug) | 2.5ft (0.7m) 8s |
| Most Powerful | 1PM (Thu 13th Aug) | 2ft (0.6m) 10s |
Table - best surf conditions forecast for Porth Ceriad over the next 16 days.
The Lowdown
Alright, mates, Rusty here again, this time in the old numbers. I’ve run the numbers, and it’s a bleak picture for the next couple of weeks. There’s a massive dry spell before we see anything that even looks like a wave.
From Thursday the 6th of August all the way to Wednesday the 12th, it’s flat. We’re talking ankle-biters under 2 feet, messed up by onshore breezes. The combined wave energy is weak, barely hitting triple digits (3-38). Don’t even bother.
The only real chance to get wet comes on Thursday the 13th of August. The morning session at Porth Ceriad is the one. We’ve got a tiny 2 foot groundswell from the WSW, with a period of 8 seconds. The good news is a light northwesterly cross-offshore wind, so the surface will be clean. Combined wave energy is still a weak 50, but it’s the best we’ve got. The water is at 64°, which is much warmer than usual. It’s a beginner-friendly, fairly consistent beach, so it’ll be small, clean, and easy.
After that, it’s back to the flat. Friday the 14th and Saturday the 15th are rubbish with onshore wind. Sunday the 16th sees a bump to 4 feet on the afternoon from the SW, but it’s a short 5-second period and a strong 25 km/h cross-offshore wind. The energy is only 68, so it’ll be clean but weak and messy.
From the 17th onward, it’s a total bust. Swell drops back under 2 feet, and the wind is inconsistent. By the 21st of August, we’ve got 40 km/h winds, but the swell is a pathetic 0.3 feet. It’s a kite-surfing wind tunnel, not a surf spot.
So, the only window is the morning of Thursday the 13th of August at Porth Ceriad. The rest of the 16 days is a write-off. Hang tight, the ocean will wake up eventually.
Rusty.
Short Range ForecastMostly dry. Very mild (max 17°C on Thu night, min 14°C on Thu morning). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 20°C on Mon night, min 17°C on Sun morning). Wind will be generally light. | ||||||||||||||||||||
Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | |||||||||||||||
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) | W 13 | SW 6 | SW 4 | SW 4 | SW 5 | SW 4 | SW 4 | SW 4 | WSW 7 | SW 7 | SW 6 | SW 6 | SW 6 | SW 6 | WSW 6 | SW 6 | SW 6 | W 12 | WSW 10 | WSW 9 | SW 5 |
Wave Graph  | |||||||||||||||||||||
 kJ | 3 | 16 | 24 | 7 | 3 | 5 | 5 | 3 | 5 | 7 | 7 | 6 | 6 | 6 | 3 | 1 | 1 | 3 | 10 | 34 | 27 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-on | cross | cross-on | cross-on | on | on | cross-on | on | on | cross-on | glassy | off | cross-off | cross-off | cross-on | cross-on | on | on | on | cross-on |
High Tide | 2:15PM3.45m | 2:46AM3.52m | 3:25PM3.28m | 4:04AM3.34m | 4:47PM3.30m | 5:27AM3.38m | 6:03PM3.53m | 6:38AM3.60m | 7:06PM3.90m | 7:36AM3.87m | 7:59PM4.30m | 8:26AM4.13m | 8:47PM4.64m | ||||||||
Low Tide | 8:50PM1.25m | 9:48AM1.25m | 10:25PM1.35m | 11:26AM1.31m | 00:15AM1.24m | 12:58PM1.15m | 1:37AM0.91m | 2:04PM0.85m | 2:37AM0.52m | 2:57PM0.55m | 3:28AM0.17m | 3:43PM0.31m | |||||||||
 | |  | | |  |  | | | | | | | | | | | | | | | |
 | 5:43 | — | — | 5:45 | — | — | 5:47 | — | — | 5:48 | — | — | 5:50 | — | — | 5:52 | — | — | 5:52 | — | — |
 | — | — | 9:02 | — | — | 9:00 | — | 8:59 | — | — | 8:57 | — | — | 8:54 | — | — | 8:52 | — | — | 8:51 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 14 | 15 | 17 | 16 | 16 | 15 | 15 | 17 | 16 | 17 | 18 | 18 | 19 | 19 | 20 | 20 | 20 | 19 | 19 | 19 | 19 |
Feels °C | 10 | 13 | 14 | 14 | 13 | 13 | 13 | 15 | 14 | 16 | 18 | 19 | 18 | 17 | 19 | 19 | 18 | 18 | 18 | 18 | 19 |
Swell 1 Height (m) Direction Period (s) | W 13 | NW 5 | — | SW 4 | SW 5 | SW 4 | SW 11 | SW 4 | WSW 7 | SW 7 | SW 6 | SW 6 | SW 6 | SW 6 | WSW 6 | SW 6 | SW 6 | SW 6 | WSW 10 | WSW 9 | WSW 8 |
| kJ | 3 | 11 | — | 7 | 3 | 4 | 5 | 2 | 5 | 7 | 7 | 6 | 6 | 6 | 3 | 1 | 1 | 1 | 10 | 34 | 27 |
Swell 2 Height (m) Direction Period (s) | — | SW 6 | SW 12 | — | — | SW 12 | W 11 | SW 8 | SW 7 | — | WSW 3 | — | SW 4 | — | — | — | — | W 11 | SW 6 | — | — |
| kJ | — | 16 | 6 | — | — | 5 | 2 | 3 | 2 | — | 1 | — | 1 | — | — | — | — | 3 | 1 | — | — |
Swell 3 Height (m) Direction Period (s) | — | W 12 | W 12 | SW 12 | W 12 | — | — | — | — | — | W 12 | — | — | — | — | — | — | W 12 | W 6 | — | — |
| kJ | — | 3 | 3 | 6 | 3 | — | — | — | — | — | 3 | — | — | — | — | — | — | 3 | 1 | — | — |
Wind waves Height (m) Direction Period (s) | WNW 5 | — | SW 4 | SW 4 | — | — | SW 4 | — | SW 4 | SW 3 | — | — | NW 3 | NW 3 | — | SE 2 | — | SW 3 | SW 3 | SW 4 | SW 5 |
| kJ | 62 | — | 24 | 5 | — | — | 4 | — | 2 | 3 | — | — | 1 | 1 | — | 1 | — | 1 | 3 | 4 | 23 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 306 | 317 | 303 | 307 | 303 | 298 | 298 | 298 | 298 | 301 | 298 | 302 | 298 | 303 | 301 | 312 | 337 | 186 | 247 | 252 | 126 |
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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