Surf Forecasts:
Porth Ceriad surf forecast from 29 Jul 2026:
- Best quality surf: Thursday 30 Jul, 1AM (local time) - 2.5ft (0.8m), 5s period, SW swell with cross-offshore winds.
- Most powerful swell: Thursday 30 Jul, 1AM (local time) - 2.5ft (0.8m), 5s period, SW swell with 29 kJ wave energy.
- Next surfable swell (1★+): Thursday 30 Jul, 1AM (local time) - 2.5ft (0.8m), 5s 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 (Jul 30) at 1AM. The primary swell is predicted to be 0.8m and 5s period with a secondary swell of 0.8m and 5s. 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 0.8m 5s and forecast to arrive on Thursday (Jul 30) at 1AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 4s period and expected on Thursday (Jul 30) at 1PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Thu 30th Jul) | 2.5ft (0.8m) 5s |
| Best Surf | 1AM (Thu 30th Jul) | 2.5ft (0.8m) 5s |
| Most Powerful | 1AM (Thu 30th Jul) | 2.5ft (0.8m) 5s |
Table - best surf conditions forecast for Porth Ceriad over the next 16 days.
The Lowdown
Alright, let’s get into it. This is Rusty, and I’m looking at Porth Ceriad for the next couple of weeks.
Right off the bat, I gotta be straight with you – it’s a pretty flat run. The whole 16-day window is a tough one. We’re looking at a long stretch of small, weak surf, and honestly, there isn’t a single standout day where I’d say “drop everything and go.” The swell energy is almost non-existent, with combined energy readings mostly in the single digits to low twenties, which is just whisper-weak.
Let’s run through it. Starting Wednesday the 29th of July, we’ve got a tiny 2ft SW swell with a short 4-second period, but it’s blown out by a strong cross-onshore wind. That’s a no-go. Thursday the 30th morning shows a bit of hope with a clean 1ft SW swell and a nice offshore wind from the NNW, but at just 1ft and a weak 7 combined energy, it’s barely a rideable wave. Thursday afternoon gets even cleaner with a light offshore, but still tiny.
Friday the 31st is a write-off, with no swell height recorded at all. Saturday the 1st of August has a tiny 1ft leftover swell with a cross-offshore wind, but you’d be struggling to find anything to push you. From there, we slide into a real flat spell. Sunday the 2nd through to Tuesday the 11th of August, the swell doesn’t get above 1ft, and combined energy is mostly under 25. The winds are often clean, with some offshore or cross-offshore days, and even a glassy moment on Monday the 10th of August morning, but the ocean just has no push.
The best of a bad bunch might be Wednesday the 5th of August afternoon – a clean 1.0ft SW swell with a clean cross-offshore wind, but it's still barely enough to stand up on. Or Thursday the 13th of August morning, with a 0.7ft WSW swell but a solid, fresh offshore wind from the NNW (19 mph). That wind will keep the surface glassy, but the wave size is just so small.
Water temp is sitting at 64°, which is a touch warmer than normal for this time of year – about 3° above average.
For the most part, if you’re itching for a paddle, you might get a longboard out on the cleanest of the small days, but this isn’t a period for proper surfing. The exposed SW break at Porth Ceriad just isn’t getting any of the good stuff.
Hang in there. Forecasts can always change.
Rusty
Short Range ForecastLight rain (total 3mm), mostly falling on Wed night. Very mild (max 18°C on Wed afternoon, min 13°C on Fri night). Wind will be generally light. | Days 5-7 Weather SummarySome drizzle, heaviest during Tue morning. Warm (max 24°C on Mon afternoon, min 14°C on Sat afternoon). Wind will be generally light. | |||||||||||||||||||
Wed 29 | Thursday 30 | Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | ||||||||||||||
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 4 | SW 5 | SW 5 | NW 4 | WSW 4 | W 4 | SW 4 | WSW 5 | WSW 5 | WSW 5 | WSW 4 | SW 8 | SW 8 | WSW 10 | SW 9 | SW 9 | SW 8 | SW 8 | SW 8 | SW 7 |
Wave Graph  | ||||||||||||||||||||
 kJ | 17 | 29 | 7 | 5 | 2 | 0 | 4 | 22 | 10 | 2 | 3 | 3 | 3 | 9 | 21 | 20 | 17 | 16 | 9 | 8 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-off | cross-off | off | glassy | cross | cross-on | cross-off | cross-off | on | glassy | cross-off | cross-off | cross-off | cross-off | off | cross-off | cross | off | off |
High Tide | 9:16PM4.07m | 9:32AM3.82m | 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 | |||||||
Low Tide | 4:02PM0.66m | 4:30AM0.51m | 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 | |||||||
 |  |  | |  | | | | | |  |  | |  | | | |  | | | |
 | — | — | 5:31 | — | — | 5:33 | — | — | 5:35 | — | — | 5:37 | — | — | 5:37 | — | — | 5:39 | — | — |
 | — | 9:16 | — | — | 9:15 | — | — | 9:13 | — | — | 9:12 | — | — | 9:09 | — | — | 9:07 | — | — | 9:06 |
mm | — | 1 | — | — | — | — | — | 2 | — | — | — | — | — | — | — | — | — | 1 | — | — |
Temp °C | 18 | 17 | 15 | 16 | 16 | 14 | 16 | 17 | 14 | 15 | 15 | 17 | 18 | 18 | 20 | 24 | 20 | 16 | 16 | 15 |
Feels °C | 15 | 16 | 11 | 14 | 15 | 11 | 12 | 13 | 12 | 13 | 14 | 17 | 16 | 14 | 18 | 20 | 16 | 15 | 14 | 11 |
Swell 1 Height (m) Direction Period (s) | — | SW 5 | SW 5 | NW 4 | WSW 4 | — | NW 4 | WSW 4 | WSW 5 | WSW 5 | WSW 4 | WSW 3 | SW 8 | NNW 4 | SW 9 | SW 9 | SW 8 | SW 8 | SW 8 | SW 7 |
| kJ | — | 29 | 7 | 5 | 2 | — | 2 | 18 | 10 | 2 | 3 | 1 | 3 | 2 | 21 | 20 | 17 | 16 | 9 | 8 |
Swell 2 Height (m) Direction Period (s) | — | — | — | SW 5 | — | — | SW 5 | W 12 | W 10 | NW 3 | SW 9 | SW 8 | — | WSW 10 | NNW 4 | NNW 4 | N 4 | — | — | — |
| kJ | — | — | — | 3 | — | — | 1 | 3 | 2 | 2 | 3 | 3 | — | 9 | 1 | 1 | 1 | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | W 9 | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | 2 | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SW 4 | WSW 5 | NW 3 | NW 4 | — | W 4 | SW 4 | WSW 5 | NW 3 | — | — | — | NNW 3 | — | — | — | — | — | NNW 3 | N 3 |
| kJ | 17 | 27 | 4 | 4 | — | 9 | 4 | 22 | 2 | — | — | — | 1 | — | — | — | — | — | 5 | 1 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 298 | 0 | 494 | 339 | 298 | 305 | 532 | 0 | 317 | 317 | 298 | 302 | 305 | 113 | 125 | 141 | 284 | 298 | 308 | 298 |
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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