Surf Forecasts:
Porth Ceriad surf forecast from 30 Jul 2026:
- Most powerful swell: Friday 31 Jul, 10PM (local time) - 3.5ft (1.0m), 5s period, WSW swell with 48 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 1.0m 5s and forecast to arrive on Friday (Jul 31) at 10PM. 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 Tuesday (Aug 04) at 10PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 10PM (Fri 31st Jul) | 3.5ft (1.0m) 5s |
Table - best surf conditions forecast for Porth Ceriad over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s be straight with you – this is one of those outlooks that’s a real heartbreaker for the Porth Ceriad area. The next 16 days are looking pretty grim for a proper paddle. We’ve got a long stretch of tiny, weak energy and mostly poor conditions.
Right now, and for the first few days, we’re scraping by on tiny swell. The wave energy is basically a whisper, with readings as low as 3 to 6 (combined energy). The water is a notable 64°F, which is much warmer than normal for this time of year, so at least the temperature is a bit of a treat. But the surf? Thursday morning the 30th has a 1 ft swell from the SW with a short 5-second period, and the wind is a cross-off from the NNW at 12 mph, which keeps it clean. It’s surfable for a beginner, but that’s about it.
The real issue is the consistency, or lack of it. There are huge gaps where you’d be wasting your time. Friday the 31st is a total write-off with onshore winds and no real swell. Saturday the 1st of August pops up with a tiny 1 ft swell from the WSW and a 5-second period, but the wind is light and cross-off, so it’ll be clean. The energy is still pathetic at 15, though. You’ll be fighting for scraps.
We get a slight flicker of hope on Monday the 3rd of August. The swell bumps up to 1 ft from the WSW with a longer 9-second period, which gives it a bit more push. The combined energy hits 32, which is the best we’ll see for a while. The wind is offshore from the NNW at 12 mph in the afternoon, making it clean. It’s still tiny, but for a longboard or a foamie, it’s the best on offer in the first week.
After that, it’s pretty much back to the doldrums. The second week is a desert. From the 5th of August onwards, we’re looking at swell heights barely breaking 1 ft, if that, with periods all over the place and mostly onshore or cross-shore winds. The energy drops back into single digits. You’ll see a few glassy moments on the afternoon of the 5th and the 14th, but with virtually no swell to ride, it’s a flat, glassy lake.
The biggest issue is that Porth Ceriad is exposed to the SW, and most of the swell we get is small and weak. The wind is often cross-on or onshore, which just ruins the tiny bumps we have. For the entire 16-day run, the highest combined energy is only 32, and that’s on the 3rd of August. That’s weak, folks. It’s not a good run for paddle surfing, and if you’re an expert, there’s nothing here for you.
Honestly, if you’re desperate for a splash, the morning of the 3rd of August is your best bet. It’s the only day that offers a clean, offshore window with a touch more period. The rest of the time, you’re better off checking the forecasts again later. This is one of those blank runs for the area, and it’s pretty normal for it to go quiet like this.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Fri afternoon. Very mild (max 18°C on Fri night, min 14°C on Thu morning). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 21°C on Mon afternoon, min 15°C on Sun morning). Wind will be generally light. | ||||||||||||||||||||
Thursday 30 | Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | |||||||||||||||
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 5 | SW 5 | SW 4 | W 4 | WSW 3 | WSW 5 | WSW 5 | SW 5 | WSW 4 | WSW 4 | SW 8 | WSW 10 | WSW 9 | WSW 9 | SW 8 | SW 8 | SW 8 | SW 7 | SW 7 | SW 7 | SW 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 6 | 3 | 1 | 0 | 4 | 29 | 11 | 3 | 3 | 3 | 3 | 9 | 31 | 30 | 18 | 16 | 9 | 8 | 7 | 7 | 7 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross | cross | cross-on | cross-off | cross-off | cross-on | cross-on | cross | off | cross-off | cross-off | off | cross | cross-on | cross | cross-on | cross-on | glassy | cross-off |
High Tide | 9:49PM4.25m | 10:06AM3.92m | 10:23PM4.38m | 10:40AM3.99m | 10:57PM4.42m | 11:15AM4.00m | 11:32PM4.39m | 11:53AM3.96m | 00:11AM4.27m | 12:34PM3.84m | 00:54AM4.07m | 1:20PM3.66m | 1:44AM3.80m | ||||||||
Low Tide | 4:35PM0.55m | 5:04AM0.42m | 5:09PM0.50m | 5:38AM0.39m | 5:41PM0.53m | 6:12AM0.44m | 6:13PM0.62m | 6:46AM0.54m | 6:45PM0.75m | 7:20AM0.69m | 7:17PM0.91m | 7:56AM0.87m | 7:54PM1.08m | ||||||||
 | |  | |  |  | | |  |  | | | | |  | |  | | | | | |
 | 5:31 | — | — | 5:33 | — | — | 5:35 | — | — | 5:37 | — | — | 5:37 | — | — | 5:39 | — | — | 5:41 | — | — |
 | — | — | 9:15 | — | — | 9:13 | — | — | 9:12 | — | — | 9:09 | — | — | 9:07 | — | — | 9:06 | — | — | 9:04 |
mm | — | — | — | — | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 16 | 16 | 14 | 17 | 18 | 14 | 15 | 15 | 17 | 19 | 19 | 20 | 21 | 20 | 16 | 18 | 18 | 18 | 20 | 21 |
Feels °C | 11 | 13 | 15 | 11 | 11 | 13 | 12 | 13 | 13 | 15 | 15 | 15 | 18 | 17 | 17 | 15 | 18 | 18 | 19 | 19 | 20 |
Swell 1 Height (m) Direction Period (s) | SW 5 | SW 5 | SW 4 | — | NW 4 | WSW 5 | WSW 5 | SW 5 | WSW 4 | WSW 4 | SW 8 | WSW 10 | WSW 9 | WSW 9 | SW 8 | NW 6 | SW 8 | N 4 | SW 7 | SW 7 | SW 7 |
| kJ | 6 | 3 | 1 | — | 2 | 29 | 11 | 3 | 3 | 1 | 3 | 9 | 31 | 30 | 18 | 9 | 9 | 9 | 7 | 7 | 7 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | W 12 | W 10 | NW 4 | SW 9 | SW 8 | — | NNW 3 | NW 4 | — | NNW 6 | SW 8 | — | SW 7 | NW 3 | — | NNW 3 |
| kJ | — | — | — | — | — | 3 | 2 | 2 | 3 | 3 | — | 1 | 1 | — | 7 | 16 | — | 8 | 2 | — | 1 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | W 9 | W 9 | — | — | — | — | — | — | NW 4 | N 6 | — | — | — | W 13 | W 13 |
| kJ | — | — | — | — | — | — | 2 | 2 | — | — | — | — | — | — | 1 | 1 | — | — | — | 3 | 3 |
Wind waves Height (m) Direction Period (s) | NW 4 | NW 4 | — | W 4 | WSW 3 | — | NW 4 | — | — | — | — | — | — | NNW 4 | ESE 3 | — | NNW 3 | — | — | NNW 3 | — |
| kJ | 8 | 5 | — | 7 | 4 | — | 3 | — | — | — | — | — | — | 3 | 3 | — | 6 | — | — | 1 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 638 | 533 | 298 | 317 | 494 | 339 | 317 | 317 | 213 | 298 | 295 | 125 | 107 | 141 | 125 | 186 | 305 | 70 | 213 | 280 | 254 |
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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