Surf Forecasts:
Porth Ceriad surf forecast from 19 Aug 2026:
- Most powerful swell: Thursday 20 Aug, 1AM (local time) - 4ft (1.2m), 6s period, WSW swell with 87 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 1.2m 6s and forecast to arrive on Thursday (Aug 20) 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 1.2m 5s period and expected on Thursday (Aug 20) at 4PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 1AM (Thu 20th Aug) | 4ft (1.2m) 6s |
Table - best surf conditions forecast for Porth Ceriad over the next 16 days.
The Lowdown
Alright, grab a coffee, surfers. Rusty here, and I gotta level with you. The outlook for the next couple of weeks is a real tough one. We're looking at a long, dry spell with hardly any waves worth paddling for.
The first real recommendation isn't until Thursday morning, the 20th of August, over at Porth Ceriad. Even then, it's a bit of a struggle. The water is feeling *much warmer than normal* for this time of year (67°F with a 6°F anomaly), so the ocean's got a tropical feel, but no swell to back it up. The surf is small and the energy is weak (combined energy of all swells directed here is 44), with a 2ft swell from the SW. The wind is offshore from the NNW, which is a major positive, keeping the surface clean. But honestly, with that tiny swell, it's a knee-slapper and not much more.
The whole rest of the forecast period is a write-off. Every single day listed is described as "poor surf conditions" with a score of zero. We’re talking about a gap of over two weeks where there’s no real surf to be had. The swell never gets above 3ft, and even that little bump comes with strong cross or onshore winds, creating lumpy, choppy conditions. The 21st through the 25th is all 0.3ft of leftover energy, and while the winds go offshore, there’s just no wave to ride.
There is a slight uptick in energy around the 31st of August, with a 2ft SW swell and a period of 9 seconds, but it’s paired with a fresh cross-offshore breeze, which cleans it up a bit. Still, it's a 2ft wave. The 1st of September brings a bit more height (3ft), but it's cross-shore and lumpy again. The period on the 2nd of September jumps to 16 seconds, which is a very long period groundswell, but the swell height is only 0.3ft from the W. It's a sign of deep water energy, but it's not breaking in any meaningful way.
To be brutally honest, for the next 16 days, the gear is gonna stay dry. The breaks are fairly consistent around here, so it won't stay this flat forever, but for this window, it's a total blank. The only thing that might be worth a look is if you're into kite surfing, because those strong cross-shore winds on the bigger days (like the 27th and 29th) could be fun for that, but for a paddle surfer? Leave it.
Rusty.
Short Range ForecastLight rain (total 9mm), mostly falling on Thu morning. Very mild (max 17°C on Wed afternoon, min 12°C on Fri night). Mainly fresh winds. | Days 4-6 Weather SummaryMostly dry. Warm (max 21°C on Mon afternoon, min 12°C on Sat night). Mainly fresh winds. | ||||||||||||||||||||
Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | |||||||||||||||
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) | WSW 4 | SW 4 | WSW 6 | SW 7 | SW 7 | SW 6 | SW 13 | W 16 | W 16 | SW 15 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 13 | SW 13 | SW 13 | WSW 6 |
Wave Graph  | |||||||||||||||||||||
 kJ | 24 | 16 | 87 | 36 | 21 | 9 | 7 | 7 | 7 | 9 | 9 | 8 | 8 | 7 | 8 | 8 | 7 | 7 | 7 | 7 | 6 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross-off | off | off | off | cross-off | cross-off | off | off | off | off | off | off | cross-off | cross | off | cross | cross-off | off | cross-off |
High Tide | 1:17PM3.43m | 1:41AM3.34m | 2:05PM3.11m | 2:38AM2.96m | 3:15PM2.85m | 4:06AM2.73m | 4:55PM2.79m | 5:42AM2.76m | 6:14PM2.97m | 6:45AM2.97m | 7:07PM3.26m | 7:28AM3.22m | 7:46PM3.59m | ||||||||
Low Tide | 7:58PM1.17m | 8:25AM1.34m | 8:46PM1.43m | 9:17AM1.59m | 10:04PM1.63m | 10:53AM1.71m | 00:05AM1.62m | 12:43PM1.59m | 1:27AM1.39m | 1:44PM1.32m | 2:15AM1.10m | 2:25PM1.03m | 2:53AM0.81m | ||||||||
 |  |  | | |  |  | |  | | | | | | | | | |  |  | | |
 | 6:05 | — | — | 6:07 | — | — | 6:07 | — | — | 6:09 | — | — | 6:11 | — | — | 6:13 | — | — | 6:15 | — | — |
 | — | 8:37 | — | — | 8:34 | — | — | 8:31 | — | — | 8:30 | — | — | 8:28 | — | — | 8:25 | — | — | 8:22 | — |
mm | — | 1 | 4 | 4 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 1 |
Temp °C | 15 | 17 | 17 | 16 | 16 | 14 | 14 | 16 | 14 | 14 | 15 | 15 | 15 | 17 | 16 | 18 | 21 | 19 | 18 | 17 | 17 |
Feels °C | 11 | 12 | 14 | 11 | 10 | 9 | 10 | 11 | 9 | 10 | 10 | 11 | 12 | 13 | 13 | 17 | 16 | 12 | 14 | 13 | 15 |
Swell 1 Height (m) Direction Period (s) | W 16 | NW 4 | SW 16 | SW 7 | SW 7 | SW 6 | WSW 6 | SW 6 | SW 13 | SW 15 | SW 15 | SW 15 | SW 14 | SW 14 | — | SW 14 | SW 14 | — | SW 13 | SW 13 | WSW 6 |
| kJ | 5 | 3 | 10 | 36 | 21 | 9 | 3 | 1 | 7 | 9 | 9 | 8 | 8 | 7 | — | 8 | 7 | — | 7 | 7 | 4 |
Swell 2 Height (m) Direction Period (s) | W 16 | — | — | SW 15 | SW 14 | SW 14 | SW 13 | SW 13 | SW 6 | W 6 | W 12 | SW 12 | W 14 | W 9 | SW 14 | W 9 | W 8 | SW 13 | W 8 | S 8 | SW 12 |
| kJ | 5 | — | — | 8 | 8 | 8 | 7 | 7 | 1 | 1 | 3 | 6 | 4 | 2 | 8 | 2 | 1 | 7 | 1 | 1 | 6 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | W 14 | — | W 16 | W 16 | — | — | W 12 | W 9 | — | W 8 | — | — | W 8 | — | — | W 9 |
| kJ | — | — | — | — | — | 4 | — | 5 | 5 | — | — | 3 | 2 | — | 1 | — | — | 1 | — | — | 1 |
Wind waves Height (m) Direction Period (s) | WSW 4 | SW 4 | WSW 6 | NW 5 | NNW 5 | NNW 4 | NW 5 | NW 4 | NNW 5 | NNW 5 | NNW 3 | N 4 | NNW 5 | NW 3 | — | — | — | ESE 3 | — | — | — |
| kJ | 24 | 16 | 87 | 43 | 67 | 25 | 24 | 13 | 25 | 9 | 7 | 6 | 7 | 2 | — | — | — | 3 | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 298 | 290 | 342 | 126 | 785 | 138 | 138 | 277 | 303 | 186 | 189 | 189 | 303 | 306 | 189 | 298 | 301 | 298 | 254 | 189 | 125 |
Best forecast wave conditions in Lleyn Peninsula | |||||||||||||||||||||
Best forecast wave conditions in United Kingdom | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Porth Ceriad surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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.
Nearest