Surf Forecasts:
Porth Ceriad surf forecast from 21 Aug 2026:
- Most powerful swell: Thursday 27 Aug, 1AM (local time) - 4.5ft (1.3m), 6s period, SSW swell with 93 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 6s and forecast to arrive on Thursday (Aug 27) at 1AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 5s period and expected on Friday (Aug 21) at 10AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 1AM (Thu 27th Aug) | 4.5ft (1.3m) 6s |
Table - best surf conditions forecast for Porth Ceriad over the next 16 days.
The Lowdown
Alright, folks, Rusty here. Let's break down what's cookin' for the next couple weeks.
It's a dry spell, plain and simple. We've got a long stretch of nada before anything even gets close to rideable. The first hint of a wave shows up on Friday the 28th of August, but before that, from right now all the way through Thursday the 27th, it’s all tiny, blown-out junk. Leave the sticks at home.
Porth Ceriad is the only spot in the picture. It's a beginner-friendly, exposed break that likes swell from the southwest. Water temp is about what you'd expect for this time of year, nothing out of the ordinary.
On Friday morning the 28th of August, we've got a tiny 0.9m (that's about 3ft) swell from the southwest. The wind is light offshore from the NNW, keeping it clean. The period is about 7 seconds, and the combined energy is moderate at 74. The rating is just a 1 out of 10, so it's surfable but barely. This is the only real highlight of the whole period, and that's not saying much. The light wind means it’ll be clean, so if you're jonesing for a few small, weak ones, that's your one shot.
After that, from the 29th of August, the swell jumps up—hitting over 2.1m (around 7ft) on the afternoon of the 29th—but the wind swings onshore and messy. That day has some serious energy at 437, but it's lumpy and cross-onshore. Not worth it for a paddle surfer; maybe a kite surfer would have fun. Then it all fades back to tiny, weak conditions with strong winds into early September.
So, the call is simple: one clean, tiny session on Friday the 28th, then a whole lot of waiting. When it’s this quiet, you just gotta be patient.
Keep your head up.
Rusty.
Short Range ForecastLight rain (total 4mm), mostly falling on Fri morning. Very mild (max 17°C on Fri afternoon, min 13°C on Thu night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 20mm), heaviest during Wed morning. Warm (max 24°C on Tue afternoon, min 15°C on Sun night). Mainly fresh winds. | ||||||||||||||||||||
Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | |||||||||||||||
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) | W 14 | NW 5 | W 16 | SW 15 | SW 15 | SW 15 | SW 14 | SW 14 | WSW 11 | WSW 10 | WSW 9 | SE 4 | ESE 4 | ESE 4 | SSE 3 | SSW 4 | SSW 4 | SSW 6 | SW 7 | SSW 8 | SW 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 7 | 17 | 7 | 9 | 9 | 8 | 8 | 7 | 12 | 9 | 8 | 13 | 25 | 28 | 7 | 23 | 31 | 93 | 57 | 56 | 20 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | off | off | off | cross-off | cross-off | cross | cross | off | cross | cross | cross | cross | cross | on | on | cross-on | on | cross-on |
High Tide | 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 | 8:04AM3.49m | 8:20PM3.91m | 8:37AM3.75m | 8:52PM4.21m | ||||||||
Low Tide | 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 | 3:01PM0.77m | 3:27AM0.54m | 3:34PM0.55m | ||||||||
 | |  |  | | | | | |  | |  |  | |  |  |  |  | | | | |
 | 6:07 | — | — | 6:09 | — | — | 6:11 | — | — | 6:13 | — | — | 6:15 | — | — | 6:16 | — | — | 6:18 | — | — |
 | — | 8:31 | — | — | 8:30 | — | — | 8:28 | — | — | 8:25 | — | — | 8:22 | — | — | 8:21 | — | — | 8:19 | — |
mm | 3 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 15 | 3 | 3 | — | 1 | — |
Temp °C | 15 | 17 | 15 | 14 | 14 | 14 | 15 | 16 | 16 | 20 | 23 | 22 | 21 | 24 | 18 | 17 | 19 | 17 | 18 | 18 | 17 |
Feels °C | 11 | 15 | 11 | 10 | 9 | 11 | 13 | 13 | 14 | 19 | 19 | 16 | 16 | 19 | 20 | 12 | 15 | 11 | 15 | 16 | 16 |
Swell 1 Height (m) Direction Period (s) | WSW 6 | NW 5 | SW 13 | SW 15 | SW 15 | SW 15 | N 4 | SW 14 | WSW 11 | WSW 10 | WSW 9 | SW 13 | SW 13 | SW 13 | SW 8 | W 12 | W 12 | SW 12 | SW 7 | SSW 8 | SW 8 |
| kJ | 3 | 17 | 7 | 9 | 9 | 8 | 1 | 7 | 12 | 9 | 8 | 7 | 7 | 7 | 3 | 3 | 3 | 5 | 57 | 56 | 20 |
Swell 2 Height (m) Direction Period (s) | SW 13 | WSW 6 | SW 6 | W 6 | SW 12 | SW 12 | SW 14 | W 9 | — | SW 14 | SW 13 | SW 9 | SW 9 | SW 8 | SW 13 | — | — | W 12 | SSW 8 | — | W 12 |
| kJ | 7 | 3 | 1 | 1 | 6 | 6 | 8 | 2 | — | 8 | 7 | 3 | 3 | 3 | 7 | — | — | 3 | 7 | — | 3 |
Swell 3 Height (m) Direction Period (s) | W 14 | SW 13 | W 16 | W 6 | W 6 | — | — | — | — | — | — | — | — | — | W 13 | — | — | — | SW 10 | — | — |
| kJ | 4 | 7 | 5 | 1 | 1 | — | — | — | — | — | — | — | — | — | 3 | — | — | — | 4 | — | — |
Wind waves Height (m) Direction Period (s) | NW 5 | — | N 4 | NNW 5 | NNW 5 | NNW 5 | — | NNW 4 | — | — | — | SE 4 | ESE 4 | ESE 4 | SSE 3 | SSW 4 | SSW 4 | SSW 6 | SE 3 | SSE 3 | S 3 |
| kJ | 33 | — | 7 | 9 | 14 | 7 | — | 1 | — | — | — | 13 | 25 | 28 | 6 | 23 | 31 | 93 | 3 | 1 | 5 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 138 | 308 | 200 | 133 | 308 | 133 | 130 | 270 | 113 | 298 | 113 | 302 | 363 | 342 | 280 | 189 | 322 | 184 | 43 | 319 | 132 |
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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