Surf Forecasts:
Porth Ceriad surf forecast from 31 Jul 2026:
- Best quality surf: Wednesday 5 Aug, 7PM (local time) - 2ft (0.6m), 6s period, SW swell with cross-offshore winds.
- Most powerful swell: Friday 31 Jul, 10PM (local time) - 3.5ft (1.0m), 5s period, WSW swell with 48 kJ wave energy.
- Next surfable swell (1★+): Wednesday 5 Aug, 7PM (local time) - 2ft (0.6m), 6s 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 Wednesday (Aug 05) at 7PM. The primary swell is predicted to be 0.6m and 6s period with a secondary swell of 0.1m and 13s. Another secondary swell of 0.4m and 4s is also forecast. 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 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 0.5m 3s period and expected on Sunday (Aug 02) at 10PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7PM (Wed 5th Aug) | 2ft (0.6m) 6s |
| Best Surf | 7PM (Wed 5th Aug) | 2ft (0.6m) 6s |
| 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, let’s get into it. Rusty here, and I’ve got to be straight with you – this is a tough one. The next 16 days are looking pretty flat for Porth Ceriad. There’s no real swell to speak of, and the best we can do is a whole lot of nothing. The first bit of surf that’s even worth mentioning is a tiny pulse showing up, but it’s a long wait.
The first worthwhile window hits on Monday, the 3rd of August. Even then, we’re only looking at 1ft of swell from the SW, with a period of 9 seconds. The combined energy is weak (24-29), so it’s not going to be anything to write home about. The morning has a bit of cross-onshore breeze, but by the afternoon, it goes clean with a cross-offshore wind from the NW. That’s the best of a poor bunch – clean, tiny, and weak.
Tuesday the 4th might be your best bet. The swell is still just 1ft from the SW, but the period drops to 8 seconds. The highlight is the morning, with glassy conditions and a light SSW wind. It’s going to be small, but if you’ve got a longboard, that’s the time to go. The combined energy is only 16, so you’ll be scratching for waves.
Wednesday the 5th sees a tiny bump – the swell height nudges up to 2ft from the SSW in the afternoon, with a period of 7 seconds. The wind goes clean with a cross-offshore from the NNW. The combined energy jumps to 41, which is still weak, but it’s the most energy we’ll see. It’s not a standout, but it’s the closest thing to a wave all week.
After that, it’s back to flatness. From Thursday the 6th right through to the end of the forecast on the 15th, the swell drops to 0.3ft or 1ft, with periods of 6-12 seconds and combined energy that barely hits double digits. There are a few days with offshore winds, like the 7th and 13th, but with no swell, it’s just a clean, flat ocean. The water temp is about average for the time of year, nothing unusual.
So, the honest truth? There’s nothing to get excited about. The standout, if you can call it that, is Tuesday the 4th morning with the glassy conditions, or Wednesday the 5th afternoon for the slightly bigger swell. For the rest, you’re better off waiting for the next forecast. This is a classic case of a blank run – it’s not unusual for the area, but it’s a lousy run for us.
Rusty.
Short Range ForecastSome drizzle, heaviest during Fri night. Very mild (max 19°C on Sun afternoon, min 13°C on Fri night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 21°C on Mon afternoon, min 16°C on Tue night). Wind will be generally light. | ||||||||||||||||||||
Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | |||||||||||||||
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 | WSW 3 | SW 5 | SW 5 | SW 5 | SW 9 | WSW 4 | SW 8 | WSW 9 | SW 9 | WSW 9 | SW 8 | SW 8 | SW 7 | SW 7 | SW 7 | SSW 7 | SW 6 | SW 6 | SW 6 | SW 6 |
Wave Graph  | |||||||||||||||||||||
 kJ | 5 | 5 | 24 | 7 | 6 | 3 | 3 | 3 | 7 | 20 | 29 | 34 | 16 | 14 | 8 | 15 | 38 | 18 | 9 | 5 | 6 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross-off | cross-off | on | cross-on | cross | cross-off | cross-off | cross-on | cross-off | glassy | glassy | cross-on | off | off | cross-off | off | cross-off | cross-off | off |
High Tide | 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 | 2:15PM3.45m | 2:46AM3.52m | |||||||
Low Tide | 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 | 8:41AM1.07m | 8:50PM1.25m | |||||||
 | |  | | |  |  |  |  | | | | | | | | | | | |  | |
 | 5:33 | — | — | 5:35 | — | — | 5:37 | — | — | 5:37 | — | — | 5:39 | — | — | 5:41 | — | — | 5:43 | — | — |
 | — | — | 9:13 | — | — | 9:12 | — | — | 9:09 | — | — | 9:07 | — | — | 9:06 | — | — | 9:04 | — | — | 9:02 |
mm | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 14 | 16 | 18 | 14 | 15 | 15 | 17 | 19 | 18 | 20 | 21 | 19 | 17 | 18 | 17 | 17 | 17 | 17 | 17 | 17 | 16 |
Feels °C | 11 | 11 | 13 | 12 | 14 | 14 | 16 | 15 | 13 | 19 | 18 | 18 | 17 | 19 | 17 | 17 | 15 | 16 | 16 | 15 | 14 |
Swell 1 Height (m) Direction Period (s) | SW 5 | NW 4 | SW 5 | SW 5 | SW 5 | WSW 4 | WSW 4 | SW 8 | N 3 | SW 9 | WSW 9 | SW 8 | SW 8 | SW 7 | SW 7 | SW 7 | W 13 | SW 6 | SW 6 | SW 6 | SW 6 |
| kJ | 5 | 2 | 24 | 7 | 6 | 1 | 1 | 3 | 2 | 20 | 29 | 34 | 16 | 14 | 8 | 15 | 3 | 18 | 9 | 5 | 5 |
Swell 2 Height (m) Direction Period (s) | — | — | W 12 | W 10 | NW 4 | SW 9 | SW 8 | — | WSW 9 | — | — | NNW 3 | — | — | — | — | — | NW 4 | NW 4 | — | — |
| kJ | — | — | 3 | 2 | 2 | 3 | 3 | — | 7 | — | — | 1 | — | — | — | — | — | 1 | 2 | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | W 9 | — | — | — | SW 10 | — | — | — | — | — | — | — | — | W 13 | W 13 | W 12 | SW 12 |
| kJ | — | — | — | — | 2 | — | — | — | 4 | — | — | — | — | — | — | — | — | 3 | 3 | 3 | 6 |
Wind waves Height (m) Direction Period (s) | NW 4 | WSW 3 | NW 3 | NW 4 | — | — | — | NNW 2 | ENE 3 | ESE 3 | — | — | — | — | — | ESE 2 | SSW 7 | — | — | NW 4 | — |
| kJ | 3 | 5 | 1 | 5 | — | — | — | 1 | 1 | 4 | — | — | — | — | — | 1 | 38 | — | — | 2 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 317 | 532 | 327 | 306 | 317 | 298 | 298 | 301 | 133 | 107 | 296 | 113 | 186 | 133 | 113 | 113 | 129 | 113 | 350 | 632 | 312 |
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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