
Surf Forecasts:
Porth Ceriad surf forecast from 1 Aug 2026:
- Most powerful swell: Thursday 6 Aug, 1AM (local time) - 4.5ft (1.3m), 7s period, WSW swell with 178 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 1.3m 7s and forecast to arrive on Thursday (Aug 06) 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 1.1m 5s period and expected on Thursday (Aug 06) at 7AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 1AM (Thu 6th Aug) | 4.5ft (1.3m) 7s |
Table - best surf conditions forecast for Porth Ceriad over the next 16 days.
The Lowdown
Alright, surfers, Rusty here. I’ve looked over the charts for Porth Ceriad, and I’ve got to be straight with you – it’s a tough stretch ahead. We’re looking at a 16-day window, but it’s mostly a waiting game with very little on offer.
The water temp is sitting at 63°, which is a touch warmer than normal for this time of year, so at least it’ll feel nice on the skin while you’re waiting for a wave.
The forecast kicks off from August 1st, but don’t get your hopes up. For the first week, from that Saturday right through to the following Friday, August 7th, the swell is tiny – we’re talking about 0.3ft to 1ft most of the time. The wind is messy, swinging from cross-off to onshore, and the combined swell energy is weak, barely cracking 102 on Wednesday the 5th. That’s a day where the swell bumps up to 4ft, but it’s a short-period 7-second wind swell with a cross-shore wind, so it’s going to be a choppy, poor-quality mess. Honestly, not worth paddling out for.
From August 8th to the 11th, it’s more of the same. Tiny swell, or even flat on the morning of the 10th. The energy is next to nothing. There’s a glimmer on the afternoon of the 10th with a 2ft NW swell and offshore winds from the NNW, and the waves are clean. The combined energy is still weak at 29, but it’s the best we’ll see for a while. If you’re desperate, you might find a tiny, clean wave.
Then we hit another gap. From August 12th to the 15th, it’s back to tiny, weak surf with poor conditions, onshore winds, and energy levels in the single digits. That’s four days of nothing.
The only real standout, and I mean the only one, happens on the final day of the forecast, August 16th. The morning brings a 3ft swell from the WSW with a 5-second period, and a cross-shore wind from the ESE. The energy is a bit more present at 48. But the afternoon is where it’s at – the swell drops slightly to 3ft, but the wind swings to a cross-off from the NNW, leaving the surf clean. It’s not huge, but it’s the most promising session in the entire 16 days. For a beginner spot like Porth Ceriad, this is about as good as it’s gonna get.
So, the bottom line: there’s a long, dry spell for the first week and a half. The best bet is either the afternoon of August 10th for a tiny, clean wave, or holding out for the afternoon of August 16th for a slightly bigger, clean session. Keep your board waxed and your eyes on the sky.
Rusty.
Short Range ForecastSome drizzle, heaviest during Mon night. Warm (max 22°C on Mon afternoon, min 14°C on Sat morning). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 2mm), mostly falling on Tue night. Very mild (max 19°C on Tue morning, min 13°C on Wed night). Winds decreasing (fresh winds from the NW on Wed night, light winds from the SSE by Thu night). | ||||||||||||||||||||
Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | |||||||||||||||
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 4 | SW 4 | WSW 4 | SW 8 | WSW 10 | SW 9 | WSW 8 | SW 8 | SW 8 | SSW 5 | SW 5 | SW 7 | SW 7 | WSW 7 | SW 7 | WSW 6 | SW 5 | SW 5 | SW 5 | SW 12 |
Wave Graph | |||||||||||||||||||||
6 | 3 | 4 | 3 | 3 | 9 | 20 | 28 | 33 | 16 | 19 | 45 | 102 | 91 | 178 | 63 | 25 | 26 | 9 | 4 | 5 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | on | cross-on | cross-on | off | off | cross-on | off | glassy | on | cross-on | on | cross | cross-on | cross-off | cross-off | cross | on | on | cross-on | on |
High Tide | 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 | 3:25PM3.28m | ||||||||
Low Tide | 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 | 9:48AM1.25m | 10:25PM1.35m | ||||||||
5:35 | — | — | 5:37 | — | — | 5:37 | — | — | 5:39 | — | — | 5:41 | — | — | 5:43 | — | — | 5:45 | — | — | |
— | — | 9:12 | — | — | 9:09 | — | — | 9:07 | — | — | 9:06 | — | — | 9:04 | — | — | 9:02 | — | — | 9:00 | |
mm | — | — | — | — | — | — | — | — | 1 | — | — | 2 | — | — | — | — | — | — | — | — | — |
Temp °C | 14 | 15 | 15 | 17 | 18 | 17 | 21 | 22 | 18 | 19 | 19 | 18 | 16 | 19 | 16 | 14 | 15 | 16 | 15 | 16 | 16 |
Feels °C | 11 | 13 | 14 | 16 | 15 | 13 | 21 | 21 | 16 | 18 | 17 | 15 | 12 | 14 | 11 | 9 | 12 | 14 | 14 | 13 | 14 |
Swell 1 Height (m) Direction Period (s) | SW 5 | SW 4 | SW 4 | WSW 4 | SW 8 | WSW 9 | SW 9 | WSW 8 | SW 8 | SW 8 | SW 7 | WSW 7 | — | — | W 13 | SW 7 | NW 5 | NNW 5 | SW 5 | NW 4 | SW 5 |
6 | 3 | 4 | 1 | 3 | 9 | 20 | 28 | 33 | 16 | 19 | 5 | — | — | 3 | 63 | 20 | 2 | 9 | 2 | 1 | |
Swell 2 Height (m) Direction Period (s) | W 10 | NW 4 | SW 9 | SW 8 | SW 4 | WSW 10 | NNW 4 | — | — | — | — | WSW 6 | — | — | — | W 13 | WSW 6 | SW 12 | NNW 4 | SW 5 | — |
2 | 2 | 3 | 3 | 1 | 9 | 1 | — | — | — | — | 4 | — | — | — | 3 | 25 | 6 | 1 | 4 | — | |
Swell 3 Height (m) Direction Period (s) | — | W 9 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | W 12 | — | SW 12 | W 12 | SW 12 |
— | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 3 | — | 6 | 3 | 5 | |
Wind waves Height (m) Direction Period (s) | NW 4 | — | — | — | — | NNE 3 | ESE 3 | — | — | SSE 3 | SSW 5 | SW 5 | SW 7 | SW 7 | WSW 7 | NW 5 | — | SW 5 | NW 4 | NW 4 | — |
5 | — | — | — | — | 4 | 5 | — | — | 1 | 17 | 45 | 102 | 91 | 178 | 50 | — | 26 | 3 | 3 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 305 | 317 | 213 | 298 | 301 | 130 | 132 | 138 | 125 | 296 | 319 | 200 | 3 | 317 | 126 | 135 | 3 | 141 | 307 | 317 | 301 |
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.











