Surf Forecasts:
Porth Ceriad surf forecast from 23 Jul 2026:
- Most powerful swell: Saturday 25 Jul, 4PM (local time) - 3ft (0.9m), 5s period, WSW swell with 37 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 0.9m 5s and forecast to arrive on Saturday (Jul 25) at 4PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 5s period and expected on Sunday (Jul 26) at 10AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 4PM (Sat 25th Jul) | 3ft (0.9m) 5s |
Table - best surf conditions forecast for Porth Ceriad over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s take a look at the forecast for this stretch of coast in good old imperial.
Overall, this is a tough outlook. We’re looking at a long stretch of mostly flat or very poor conditions before a late pulse of swell arrives. There's a big gap at the start with nothing rideable, so don't get your hopes up for the first week.
Right now and for the next several days, Porth Ceriad is dealing with a serious lack of swell. The combined wave energy is basically zero (0) on Thursday afternoon, with a water temperature of 66°, which is much warmer than normal for this time of year, so at least the water feels nice if you want a swim. The wind is moderate offshore on Thursday afternoon, but there’s simply no swell to work with. This flat spell drags on through the end of July.
We see a tiny pulse on Friday the 31st of July, with a small 4ft SSW swell showing up in the afternoon and a combined energy of 72 (weak). Winds are light and cross-offshore, keeping things pretty clean. It's surfable but very ordinary – a 5-second period means it’s weak and crumbly, so not worth getting too excited about.
Moving into Saturday the 1st of August, we get a bigger push of swell – 7ft from the SW in the morning, ramping up to 8ft by the afternoon. The combined energy jumps to 528 in the morning and 929 in the afternoon, so there’s definitely moderate to strong energy in the water. The period is only 8 seconds, so it’s a windswell, a bit messy. Unfortunately, the wind is onshore and light, so it won't be clean. At over 8ft, this is really only for experienced surfers, and even then the conditions are marginal, with a questionable tide. After that, the next few days drop right back off into the doldrums with poor surf and onshore winds, with energy levels falling right back down.
There is no standout window here, but if I had to pick the least bad option, it’d be the afternoon of Friday the 31st of July for a tiny clean knee-high wave, or the morning of Saturday the 1st of August if you’re an expert and you don’t mind a bit of chop on a 6ft-plus closeout. The rest of the forecast is a write-off. Don’t bother waxing up until then.
- Rusty
Short Range ForecastSome drizzle, heaviest during Sat morning. Very mild (max 18°C on Sat night, min 13°C on Sat morning). Winds increasing (light winds from the WNW on Fri afternoon, fresh winds from the WSW by Sat morning). | Days 5-7 Weather SummaryMostly dry. Very mild (max 18°C on Tue afternoon, min 13°C on Sun night). Winds decreasing (fresh winds from the NW on Sun afternoon, light winds from the SSW by Tue afternoon). | |||||||||||||||||||
Thu 23 | Friday 24 | Saturday 25 | Sunday 26 | Monday 27 | Tuesday 28 | Wednesday 29 | ||||||||||||||
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) | NNW 4 | NNW 5 | W 13 | W 13 | — | W 4 | WSW 5 | WSW 5 | WNW 5 | SW 6 | SW 6 | SW 5 | SW 6 | SW 4 | SW 4 | SW 4 | SW 4 | SW 4 | WSW 4 | SW 4 |
Wave Graph  | ||||||||||||||||||||
 kJ | 0 | 0 | 3 | 3 | 0 | 9 | 37 | 28 | 0 | 25 | 15 | 6 | 8 | 8 | 6 | 4 | 4 | 4 | 2 | 1 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | cross-off | cross-off | on | cross | cross | cross | cross-off | cross-off | cross-off | cross-off | on | on | on | cross-on | on | on | on | cross-off |
High Tide | 4:19PM2.98m | 4:54AM2.99m | 5:31PM3.01m | 6:03AM3.01m | 6:32PM3.16m | 6:59AM3.15m | 7:22PM3.37m | 7:44AM3.33m | 8:04PM3.61m | 8:23AM3.51m | 8:41PM3.85m | 8:59AM3.68m | 9:16PM4.07m | |||||||
Low Tide | 11:05PM1.51m | 11:50AM1.50m | 00:39AM1.48m | 1:12PM1.43m | 1:49AM1.31m | 2:08PM1.25m | 2:38AM1.09m | 2:51PM1.04m | 3:18AM0.86m | 3:28PM0.83m | 3:55AM0.66m | 4:02PM0.66m | ||||||||
 |  |  | |  |  |  | | | | | | | | | | | | | | |
 | — | — | 5:22 | — | — | 5:24 | — | — | 5:26 | — | — | 5:26 | — | — | 5:28 | — | — | 5:30 | — | — |
 | — | 9:25 | — | — | 9:23 | — | — | 9:22 | — | — | 9:21 | — | — | 9:20 | — | — | 9:17 | — | — | 9:16 |
mm | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 17 | 16 | 16 | 17 | 16 | 15 | 16 | 18 | 16 | 17 | 16 | 14 | 15 | 16 | 17 | 18 | 18 | 17 | 18 | 18 |
Feels °C | 13 | 13 | 14 | 16 | 14 | 10 | 13 | 16 | 12 | 12 | 11 | 12 | 12 | 14 | 17 | 18 | 18 | 16 | 18 | 19 |
Swell 1 Height (m) Direction Period (s) | — | NNW 5 | N 4 | — | — | — | — | — | — | NW 5 | SW 6 | SW 5 | NW 4 | — | SW 4 | SW 4 | SW 4 | SW 4 | WSW 4 | SW 4 |
| kJ | — | 2 | 2 | — | — | — | — | — | — | 25 | 15 | 6 | 4 | — | 4 | 4 | 4 | 4 | 2 | 1 |
Swell 2 Height (m) Direction Period (s) | — | — | W 13 | W 13 | — | — | — | — | — | — | — | — | SW 6 | W 6 | — | — | — | — | NNW 4 | — |
| kJ | — | — | 3 | 3 | — | — | — | — | — | — | — | — | 8 | 1 | — | — | — | — | 1 | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | NNW 4 | NNE 2 | — | — | — | W 4 | WSW 5 | WSW 5 | WNW 5 | SW 6 | NW 5 | NW 4 | — | SW 4 | SW 4 | — | — | — | — | — |
| kJ | 25 | 1 | — | — | — | 9 | 37 | 28 | 78 | 25 | 30 | 10 | — | 8 | 6 | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 983 | 298 | 314 | 1028 | 303 | 1031 | 373 | 298 | 494 | 507 | 125 | 298 | 303 | 216 | 254 | 303 | 254 | 298 | 306 | 298 |
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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