
Surf Forecasts:
Porth Ceriad surf forecast from 31 Jul 2026:
- Best quality surf: Wednesday 5 Aug, 7PM (local time) - 2.5ft (0.8m), 7s period, SW swell with cross-offshore winds.
- Most powerful swell: Wednesday 5 Aug, 10PM (local time) - 2.5ft (0.8m), 7s period, SW swell with 73 kJ wave energy.
- Next surfable swell (1★+): Wednesday 5 Aug, 7PM (local time) - 2.5ft (0.8m), 7s 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 0.8m and 7s period with a secondary swell of 0.1m and 13s. Another secondary swell of 0.5m and 7s 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 0.8m 7s and forecast to arrive on Wednesday (Aug 05) at 10PM. Winds are predicted to be 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 (Aug 06) at 4AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7PM (Wed 5th Aug) | 2.5ft (0.8m) 7s |
| Best Surf | 7PM (Wed 5th Aug) | 2.5ft (0.8m) 7s |
| Most Powerful | 10PM (Wed 5th Aug) | 2.5ft (0.8m) 7s |
Table - best surf conditions forecast for Porth Ceriad over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s on offer.
Alright, I’m gonna be straight with you – this is a tough one. We’re looking at a solid 16-day window, but honestly, it’s a bit of a desert out there for Porth Ceriad. The pattern is pretty grim for a while. The first week and a half is dominated by weak, short-period windswell and choppy onshore conditions. The first real surf recommendation doesn't show up until the very end of the period, and even then it’s just a tiny window.
We start from Friday, the 31st of July, right through the first week of August. The swell is tiny, mostly around 1ft to 2ft from the WSW or SW, with periods barely hitting 5 seconds. That’s pure wind chop, and the winds are mostly cross or cross-onshore, making it a real mess. There’s a brief moment on Sunday afternoon, the 2nd of August, where the wind goes offshore from the north at 9 mph, but the swell is only 0.3ft with an 8-second period. Clean, but there’s nothing to ride. The combined energy those first few days is pathetic, rarely cracking double digits (5, 12, 9, 4).
The energy picks up a tiny bit around the 4th and 5th of August, with the combined energy hitting 67 and 71, but the swell height is still only 3ft to 3ft with a short period of 6-8 seconds. The wind is still a problem, mostly cross-onshore from the SW or WSW. The water is a touch warmer than normal for this time of year at 63°, but that’s about the only bright spot.
We get a few cleaner windows between the 6th and 8th of August, with cross-offshore and offshore winds from the NNW and N, but the swell is inconsistent and tiny. The morning of the 7th of August has a long period of 12 seconds, but it's only 0.3ft of swell. That’s a tease, not a wave.
The big change comes on Sunday, the 9th of August. The morning is clean with a cross-offshore breeze from the WNW and a 3ft swell (WSW, 6 seconds), giving a combined energy of 74. That’s the best looking morning of the whole first week. But the real kicker is that afternoon. The wind turns onshore from the SW, but the swell jumps to 5ft (SW, 5 seconds), and the combined energy hits 148 (moderate). The quality is poor due to the wind, but the size is something to note.
The only true standout, the only session that looks like it’s worth the paddle, is the morning of Monday, the 10th of August. We’ve got a clean 2ft swell from the SW with a 7-second period, and the wind is offshore from the north at 9 mph. The combined energy is 35. It’s not big, but it’s clean, and that’s the best combo we see across the entire 16 days. After that, it’s back to onshore winds and even smaller waves for the rest of the period, with combined energy dropping back to single digits or the teens.
So, for the one standout: Porth Ceriad, Monday morning, 10th of August. Clean, offshore wind, and some small but rideable swell. Crowds are "often" here, so expect some company. The swell direction is SW, which is what this place likes.
For the rest of the run, from the 11th to the 15th of August, it’s a write-off. The swell drops to 0.7ft to 1ft, and the winds are either strong onshore or just messy. The 13th of August has a 10-second period, but again, only 0.7ft of swell. Not worth suiting up.
Rusty.
Short Range ForecastMostly dry. Very mild (max 19°C on Sun afternoon, min 14°C on Fri night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 5mm), mostly falling on Mon night. Warm (max 20°C on Mon afternoon, min 14°C on Wed night). Wind will be generally light. | |||||||||||||||||||
Fri 31 | Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | ||||||||||||||
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) | WSW 3 | WSW 5 | WSW 5 | SW 5 | SW 4 | SW 8 | SW 8 | WSW 10 | SW 9 | SW 9 | SW 8 | SW 8 | SW 8 | SW 6 | SW 6 | SW 7 | SW 7 | SW 7 | SW 6 | SW 6 |
Wave Graph | ||||||||||||||||||||
3 | 39 | 10 | 5 | 4 | 3 | 3 | 9 | 20 | 36 | 33 | 22 | 67 | 62 | 68 | 45 | 49 | 28 | 20 | 6 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-off | cross | on | cross-on | cross | off | cross-off | cross-on | cross-off | glassy | cross-on | cross-on | on | cross-on | cross | cross-off | cross-off | cross-off | cross-off |
High Tide | 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 | 5:09PM0.50m | 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 | |||||||
— | — | 5:35 | — | — | 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 | 1 | — | 1 | — | 1 | 1 | — | — | — |
Temp °C | 17 | 18 | 14 | 15 | 15 | 18 | 19 | 17 | 19 | 20 | 19 | 18 | 19 | 19 | 18 | 17 | 16 | 15 | 17 | 17 |
Feels °C | 12 | 13 | 11 | 13 | 14 | 17 | 15 | 13 | 17 | 18 | 18 | 15 | 19 | 18 | 15 | 15 | 15 | 13 | 13 | 14 |
Swell 1 Height (m) Direction Period (s) | NW 4 | WSW 5 | WSW 5 | NW 4 | SW 4 | WSW 3 | SW 8 | N 3 | SW 9 | SW 9 | SW 8 | SW 8 | — | SW 6 | — | SW 7 | SW 7 | SW 7 | SW 6 | SW 6 |
2 | 39 | 10 | 2 | 4 | 1 | 3 | 2 | 20 | 36 | 33 | 22 | — | 6 | — | 45 | 49 | 28 | 20 | 6 | |
Swell 2 Height (m) Direction Period (s) | — | W 12 | W 10 | W 9 | SW 9 | SW 8 | — | WSW 10 | — | — | — | — | — | — | — | W 13 | W 13 | W 13 | W 12 | NNW 3 |
— | 3 | 2 | 2 | 3 | 3 | — | 9 | — | — | — | — | — | — | — | 3 | 3 | 3 | 3 | 1 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 12 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 6 | |
Wind waves Height (m) Direction Period (s) | WSW 3 | W 5 | NW 4 | SW 5 | — | — | — | ENE 3 | ESE 3 | NW 4 | — | — | SW 8 | SW 6 | SW 6 | SW 7 | NW 2 | NW 4 | NW 4 | — |
3 | 31 | 5 | 5 | — | — | — | 1 | 4 | 1 | — | — | 67 | 62 | 68 | 23 | 1 | 14 | 5 | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 494 | 324 | 306 | 306 | 306 | 298 | 298 | 113 | 107 | 138 | 125 | 252 | 3 | 245 | 241 | 3 | 125 | 130 | 298 | 355 |
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.











