Surf Forecasts:
Porth Ceriad surf forecast from 31 Aug 2026:
- Most powerful swell: Thursday 3 Sep, 1AM (local time) - 6ft (1.8m), 7s period, SW swell with 271 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 1.8m 7s and forecast to arrive on Thursday (Sep 03) at 1AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 5s period and expected on Saturday (Sep 05) at 4AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 1AM (Thu 3rd Sep) | 6ft (1.8m) 7s |
Table - best surf conditions forecast for Porth Ceriad over the next 16 days.
The Lowdown
Alright folks, Rusty here with the long-range look at Porth Ceriad.
Straight up, it’s a pretty grim run. We’ve got a blank 16-day window with absolutely nothing worth paddling out for. Every single entry the computer kicks back has poor surf conditions, and that’s the story from now right through to mid-September. It’s the kind of outlook that makes you want to wax your board just so it feels like you did something.
When we do see a bit of energy, the wind is almost always howling onshore. The first week is a write-off. Monday the 31st has a cross-off wind and waves around the 3 ft mark from the SW, but the quality is cooked with a score of zero. The water temperature is sitting at 66°F, which is a whopping 5°F warmer than usual for this time of year – that’s much warmer than normal, if you’re looking for a bright side. The combined swell energy (142) is just moderate, but it's all for nothing.
As we roll into the back half of the first week, the wind goes full cross-on and onshore, with those short-period, sloppy waves. By Wednesday the 2nd afternoon, the swell hits 5 ft from the SW with moderate energy (193), but again the wind just rips it to shreds. There's a tiny window of offshore wind on Monday the 7th of September, with clean conditions, but the swell is a piddly 1 ft and the energy is weak (32). That’s not surf, that’s a ripple.
The second week offers no hope. We see a spike in swell on Monday the 14th of September with 10 ft from the SW and some very high wave energy (1140), but direct onshore winds at 22 mph will turn that into a washing machine. At that size, over 8 ft, it’s expert-only territory, but with those winds it’s not even that. It looks more interesting for kite surfing than paddle surfing.
Honestly? This is just one of those dead runs for the area. It’s flat, it’s messy, or it’s blown out. Forecasts can change, but right now, there’s nothing to get excited about.
Rusty.
Short Range ForecastLight rain (total 7mm), mostly falling on Tue night. Very mild (max 19°C on Wed night, min 15°C on Mon morning). Mainly fresh winds. | Days 4-6 Weather SummaryModerate rain (total 10mm), heaviest on Thu night. Very mild (max 17°C on Thu morning, min 14°C on Fri night). Winds decreasing (fresh winds from the SW on Thu afternoon, light winds from the W by Sat morning). | ||||||||||||||||||||
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 | WSW 9 | WSW 8 | WSW 4 | SW 5 | WSW 5 | SW 4 | SW 6 | SW 7 | SW 6 | SW 5 | WSW 6 | WSW 6 | WSW 5 | W 5 | SW 6 | SW 5 | SW 5 | SW 4 | SW 4 | SW 5 |
Wave Graph  | |||||||||||||||||||||
 kJ | 142 | 141 | 43 | 18 | 51 | 32 | 26 | 193 | 271 | 95 | 126 | 122 | 148 | 88 | 63 | 7 | 14 | 7 | 7 | 6 | 9 |
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 | on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross-on | cross-off | cross | cross-on | on | on | 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 | 5:43PM0.44m | 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 | — | — | — | — | — | 4 | 3 | — | — | — | 1 | 9 | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 17 | 17 | 16 | 16 | 16 | 16 | 18 | 19 | 17 | 17 | 15 | 15 | 17 | 16 | 14 | 15 | 15 | 18 | 20 | 18 |
Feels °C | 9 | 15 | 14 | 12 | 11 | 13 | 10 | 14 | 16 | 14 | 13 | 14 | 9 | 11 | 10 | 12 | 12 | 12 | 15 | 17 | 15 |
Swell 1 Height (m) Direction Period (s) | SW 8 | WSW 9 | WSW 8 | — | — | WSW 5 | W 16 | — | — | SW 15 | — | SW 15 | — | NW 4 | SW 14 | SW 6 | SW 5 | SW 5 | SW 4 | SW 13 | SW 5 |
| kJ | 142 | 141 | 43 | — | — | 32 | 5 | — | — | 8 | — | 8 | — | 9 | 8 | 6 | 14 | 6 | 4 | 6 | 9 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | W 16 | — | — | — | — | — | — | — | SW 14 | — | SW 14 | NW 4 | NW 4 | SW 6 | W 13 | W 12 |
| kJ | — | — | — | — | — | 5 | — | — | — | — | — | — | — | 8 | — | 7 | 7 | 1 | 2 | 3 | 3 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 13 | SW 13 | SW 13 | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 7 | 7 | 7 | — | — |
Wind waves Height (m) Direction Period (s) | NW 5 | NW 5 | NW 4 | WSW 4 | SW 5 | — | SW 4 | SW 6 | SW 7 | SW 6 | SW 5 | WSW 6 | WSW 6 | WSW 5 | W 5 | WNW 5 | — | — | SSE 2 | SW 4 | SE 3 |
| kJ | 102 | 30 | 4 | 18 | 51 | — | 26 | 193 | 271 | 95 | 126 | 122 | 148 | 88 | 63 | 38 | — | — | 1 | 6 | 3 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 494 | 3 | 3 | 236 | 296 | 229 | 307 | 337 | 252 | 317 | 317 | 3 | 267 | 494 | 126 | 130 | 252 | 134 | 134 | 324 | 280 |
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