Surf Forecasts:
Porth Ceriad surf forecast from 27 Aug 2026:
- Most powerful swell: Thursday 3 Sep, 10AM (local time) - 8ft (2.5m), 8s period, SW swell with 818 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 2.5m 8s and forecast to arrive on Thursday (Sep 03) at 10AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Saturday (Aug 29) at 10PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 10AM (Thu 3rd Sep) | 8ft (2.5m) 8s |
Table - best surf conditions forecast for Porth Ceriad over the next 16 days.
The Lowdown
Alright, let me tell you what I’m seeing for the next couple of weeks around here. Honestly, it’s a real flat spell to start, and it’s gonna be a while before we get anything worth paddling out for.
We’ve only got one spot to look at – Porth Ceriad. For the first week, it’s basically a no-go. Tiny little dribbles, mixed with onshore winds and a lot of rain. Thursday the 27th and Friday the 28th are just knee-high slop at best, with very poor conditions. The wind is just not playing ball. The weekend of the 29th and 30th sees the swell pick up a bit, to around 4 ft, but those strong southerly winds are just gonna wreck it – lumpy, choppy mess. There’s some energy in the water on Saturday, with a combined swell energy reading of 143 to 146 (moderate), but it’s not gonna be surfable.
Monday the 31st is a tease. The swell drops a little, but we get a clean, cross-offshore breeze from the WNW. The swell is a clean 4 ft from the SW with a 9-second period. The combined energy jumps to 231 (moderate). But the score is still zero for poor conditions, so something must be off. Tuesday the 1st of September is a write-off again.
Then we get a real gap. The morning of Wednesday the 2nd through to the 11th is pretty much all poor with hardly any surf.
There is one small glimmer, very late in the window. On Friday the 4th of September, in the afternoon, we get a light offshore breeze from the North and swell just over 6 ft (6 ft) from the WSW. The combined energy is strong at 277 (moderate). The notes say it could be good. That’s the only stand-out in the entire 16 days. It’s a long way off, so don’t get your hopes up, but for an expert, that might be the one to keep an eye on. The south-west swell direction is also a good match for this break’s preferred direction.
Before that, on the morning of Saturday the 5th of September, there’s a tiny window of glassy conditions with a 3 ft swell, but the energy is weak (83) and it’s only a 6-second period, so it’ll be weak and fat.
Honestly, for the most part, this is a kite surfing forecast. The fresh onshore winds and moderate swell will make for good wind conditions, but for us paddle surfers? It’s a lean couple of weeks. The water temp on that first Thursday morning was a balmy 65°, which is *much warmer than normal* for the time of year by about 5°, which is very unusual.
Keep the board waxed for that Friday the 4th.
Rusty.
Short Range ForecastHeavy rain (total 31mm), heaviest during Fri night. Very mild (max 18°C on Thu afternoon, min 16°C on Fri night). Winds increasing (light winds from the ESE on Thu afternoon, strong winds from the SSE by Fri night). | Days 4-6 Weather SummaryLight rain (total 9mm), mostly falling on Sun afternoon. Very mild (max 18°C on Sun morning, min 14°C on Tue night). Winds decreasing (strong winds from the SW on Mon night, calm by Tue night). | ||||||||||||||||||||
Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | |||||||||||||||
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 12 | SW 12 | SSW 4 | SSW 4 | SW 6 | SW 5 | SSW 6 | SW 7 | SW 9 | SW 9 | SW 5 | SW 7 | SW 9 | WSW 9 | SW 6 | WSW 6 | WSW 4 | SW 5 | SW 6 | SW 5 | SW 5 |
Wave Graph | |||||||||||||||||||||
6 | 6 | 13 | 8 | 33 | 103 | 118 | 140 | 237 | 126 | 54 | 160 | 231 | 135 | 92 | 58 | 31 | 14 | 8 | 7 | 65 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | on | on | cross | cross-on | cross-on | cross | cross | on | cross-on | cross-on | cross-off | cross | cross-on | cross | cross-off | cross-off | cross-on | on | cross |
High Tide | 8:52PM4.21m | 9:08AM3.98m | 9:23PM4.45m | 9:41AM4.17m | 9:56PM4.61m | 10:14AM4.29m | 10:31PM4.67m | 10:49AM4.33m | 11:07PM4.61m | 11:27AM4.26m | 11:46PM4.43m | 12:07PM4.09m | 00:30AM4.13m | ||||||||
Low Tide | 3:34PM0.55m | 4:01AM0.34m | 4:07PM0.40m | 4:34AM0.22m | 4:39PM0.34m | 5:06AM0.19m | 5:11PM0.35m | 5:39AM0.26m | 5:43PM0.44m | 6:11AM0.42m | 6:15PM0.60m | 6:44AM0.65m | 6:48PM0.80m | ||||||||
6:18 | — | — | 6:20 | — | — | 6:22 | — | — | 6:22 | — | — | 6:24 | — | — | 6:26 | — | — | 6:28 | — | — | |
— | 8:19 | — | — | 8:16 | — | — | 8:14 | — | — | 8:12 | — | — | 8:09 | — | — | 8:07 | — | — | 8:05 | — | |
mm | 4 | 9 | 1 | 2 | — | 7 | 7 | 1 | — | 1 | 3 | 2 | — | — | 1 | 2 | — | — | — | 3 | 11 |
Temp °C | 17 | 18 | 17 | 17 | 17 | 17 | 18 | 17 | 16 | 18 | 17 | 16 | 15 | 16 | 16 | 16 | 16 | 17 | 16 | 17 | 17 |
Feels °C | 16 | 17 | 16 | 14 | 17 | 15 | 13 | 16 | 10 | 15 | 12 | 13 | 11 | 13 | 11 | 10 | 12 | 15 | 12 | 14 | 12 |
Swell 1 Height (m) Direction Period (s) | SW 7 | SW 6 | W 12 | SW 6 | SW 6 | — | WSW 6 | SW 7 | NW 5 | NNW 4 | — | — | SW 9 | WSW 9 | WSW 8 | — | — | SW 5 | NNW 5 | NNW 5 | — |
2 | 1 | 3 | 6 | 33 | — | 25 | 140 | 24 | 2 | — | — | 231 | 135 | 7 | — | — | 14 | 10 | 5 | — | |
Swell 2 Height (m) Direction Period (s) | — | SW 12 | — | — | — | — | — | — | NW 5 | — | — | — | — | NW 5 | — | — | — | N 6 | SW 6 | W 16 | — |
— | 6 | — | — | — | — | — | — | 23 | — | — | — | — | 14 | — | — | — | 1 | 8 | 5 | — | |
Swell 3 Height (m) Direction Period (s) | SW 12 | W 7 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | W 16 | W 16 | W 16 | — |
6 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 5 | 5 | 5 | — | |
Wind waves Height (m) Direction Period (s) | E 3 | — | SSW 4 | SSW 4 | SW 4 | SW 5 | SSW 6 | SW 4 | SW 9 | SW 9 | SW 5 | SW 7 | NW 4 | WSW 9 | SW 6 | WSW 6 | WSW 4 | NW 4 | — | SW 5 | SW 5 |
1 | — | 13 | 8 | 2 | 103 | 118 | 6 | 237 | 126 | 54 | 160 | 14 | 132 | 92 | 58 | 31 | 2 | — | 7 | 65 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 280 | 296 | 296 | 191 | 307 | 307 | 191 | 3 | 3 | 47 | 317 | 3 | 120 | 3 | 246 | 319 | 1035 | 77 | 141 | 307 | 320 |
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.











