Surf Forecasts:
Porth Ceriad surf forecast from 31 Aug 2026:
- Most powerful swell: Wednesday 2 Sep, 10PM (local time) - 6ft (1.9m), 7s period, SW swell with 325 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 1.9m 7s and forecast to arrive on Wednesday (Sep 02) at 10PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 5s period and expected on Saturday (Sep 05) at 7AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 10PM (Wed 2nd Sep) | 6ft (1.9m) 7s |
Table - best surf conditions forecast for Porth Ceriad over the next 16 days.
The Lowdown
Alright folks, it’s Rusty here. Let’s not beat around the bush – this outlook for the Porth Ceriad region is a tough one to read. There’s a big, gaping hole of poor conditions right through the entire 16-day period, and I mean the entire run. From the start of the forecast right through to the end, every single session is marked down as having poor surf. That means we’ve got a solid gap of about 16 days with no solid recommendations to chase. It’s a proper dry spell for this stretch of coast. The key takeaway is that the combination of messy winds, lumpy cross-onshore chop, and just generally unfavourable swell alignment means you’re not going to find any rideable quality in the water.
The first potential window would be Monday the 31st of August, with a 3ft swell from the SW at 8 seconds. But don’t get excited – the wind is a stiff 25 mph from the NW, a cross-off direction that should be clean. The combined wave energy is sitting at 142 (moderate), but the actual wave comment is “poor surf conditions.” That’s a hard pass. There’s a tiny bit of hope on Saturday the 5th of September with a very long, clean groundswell from the SW at 14 seconds, but the height is a paltry 0.3ft, with only 7 units of combined energy. That’s barely a ripple. The best of a bad bunch might be Tuesday the 8th of September afternoon, with a 3ft swell from WSW at 9 seconds, combined energy of 217 (moderate), but the wind is a cross-onshore from the SSW at 12 mph, making it choppy. Still poor. Later on, Thursday the 10th of September brings strong offshore winds from the NNW at 25 mph, which would clean things up, but the swell is only 1ft from the SW at 5 seconds – barely enough to surf. The pattern repeats: offshore winds with no swell, or swell with trash wind. Honestly, for the whole period, there’s nothing to recommend. It’s a washout.
Water temperatures aren’t even mentioned in the data, so we’ll skip that. There’s no standout break, no best day. If you absolutely had to paddle out for a laugh, the cleanest looking surface would be those offshore wind sessions on the 11th of September, but you’d be bobbing on 2ft to 2ft of weak energy. The setup is a beach break, so with these poor quality swells and strong, messy winds, this coast is looking far more interesting for kite-surfing than paddle surfing – there’s some good breeze but nothing for the wave rider.
Stay patient, folks. Sometimes it goes quiet like this. Forecasts can change.
Rusty
Short Range ForecastModerate rain (total 19mm), heaviest on Wed morning. Very mild (max 18°C on Wed morning, min 15°C on Sun night). Winds increasing (light winds from the WSW on Mon night, strong winds from the SSW by Wed morning). | Days 4-6 Weather SummaryLight rain (total 9mm), mostly falling on Thu night. Warm (max 20°C on Wed night, min 13°C on Fri night). Winds decreasing (strong winds from the WSW on Fri morning, light winds from the WSW by Sat afternoon). | ||||||||||||||||||||
Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 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 8 | SW 9 | WSW 8 | SW 4 | SW 5 | WSW 5 | SW 6 | SW 7 | SW 7 | SW 7 | SW 6 | WSW 6 | WSW 5 | WSW 6 | W 6 | SW 14 | SW 6 | SW 4 | SSW 4 | SW 4 | SW 5 |
Wave Graph  | |||||||||||||||||||||
 kJ | 142 | 118 | 43 | 23 | 49 | 44 | 172 | 171 | 305 | 112 | 129 | 154 | 143 | 197 | 152 | 7 | 25 | 15 | 13 | 12 | 16 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross | cross-off | cross-off | cross-on | on | on | cross-on | on |
High Tide | 10:49AM4.33m | 11:07PM4.61m | 11:27AM4.26m | 11:46PM4.43m | 12:07PM4.09m | 00:30AM4.13m | 12:53PM3.82m | 1:20AM3.76m | 1:48PM3.50m | 2:24AM3.37m | 3:01PM3.24m | 3:49AM3.13m | 4:32PM3.23m | ||||||||
Low Tide | 5:39AM0.26m | 5:43PM0.44m | 6:11AM0.42m | 6:15PM0.60m | 6:44AM0.65m | 6:48PM0.80m | 7:21AM0.92m | 7:31PM1.04m | 8:15AM1.21m | 8:50PM1.27m | 9:45AM1.42m | 10:41PM1.35m | 11:30AM1.41m | 00:19AM1.15m | |||||||
 | |  |  |  |  | | |  | |  | |  | |  | | | | | | | |
 | 6:24 | — | — | 6:26 | — | — | 6:28 | — | — | 6:30 | — | — | 6:31 | — | — | 6:33 | — | — | 6:35 | — | — |
 | — | 8:09 | — | — | 8:07 | — | — | 8:05 | — | — | 8:02 | — | — | 8:00 | — | — | 7:58 | — | — | 7:55 | — |
mm | — | — | — | — | 1 | 9 | 6 | — | — | — | 3 | 6 | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 16 | 17 | 16 | 16 | 17 | 18 | 17 | 20 | 19 | 18 | 16 | 15 | 17 | 15 | 14 | 14 | 15 | 15 | 17 | 16 |
Feels °C | 8 | 13 | 15 | 12 | 11 | 13 | 14 | 13 | 15 | 14 | 14 | 11 | 7 | 10 | 7 | 10 | 12 | 12 | 11 | 14 | 12 |
Swell 1 Height (m) Direction Period (s) | SW 8 | SW 9 | NW 4 | — | — | W 16 | — | — | — | SW 7 | — | SW 15 | — | — | SW 14 | SW 14 | NW 5 | SW 13 | SW 13 | SW 4 | SW 5 |
| kJ | 142 | 118 | 4 | — | — | 5 | — | — | — | 112 | — | 8 | — | — | 8 | 7 | 11 | 7 | 7 | 12 | 16 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | SW 14 | — | — | — | — | — | — | SW 13 | — | W 13 | SW 13 | W 12 |
| kJ | — | — | — | — | — | — | — | — | — | 8 | — | — | — | — | — | — | 7 | — | 3 | 6 | 3 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | W 13 | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 3 | — | — |
Wind waves Height (m) Direction Period (s) | NW 5 | NW 5 | WSW 8 | SW 4 | SW 5 | WSW 5 | SW 6 | SW 7 | SW 7 | — | SW 6 | WSW 6 | WSW 5 | WSW 6 | W 6 | W 5 | SW 6 | SW 4 | SSW 4 | SSE 3 | SE 3 |
| kJ | 96 | 35 | 43 | 23 | 49 | 44 | 172 | 171 | 305 | — | 129 | 154 | 143 | 197 | 152 | 67 | 25 | 15 | 13 | 1 | 2 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 494 | 3 | 3 | 236 | 303 | 229 | 312 | 337 | 295 | 252 | 316 | 314 | 460 | 460 | 241 | 271 | 135 | 125 | 134 | 141 | 248 |
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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