Surf Forecasts:
Porth Ceriad surf forecast from 25 Aug 2026:
- Most powerful swell: Tuesday 1 Sep, 4PM (local time) - 8ft (2.5m), 8s period, SW swell with 838 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 Tuesday (Sep 01) at 4PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 6s period and expected on Saturday (Aug 29) at 4PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 4PM (Tue 1st Sep) | 8ft (2.5m) 8s |
Table - best surf conditions forecast for Porth Ceriad over the next 16 days.
The Lowdown
Alright folks, Rusty here. Gotta be straight with you – it's a grim stretch ahead for Porth Ceriad. We're looking at a solid 16-day window, but honestly, the surf gods have taken a holiday. For the next week and a half, it's a whole lot of nothing with some messy, blown-out junk mixed in.
Let's start with the here and now. Tuesday the 25th, we've got a tiny 0.3ft SW swell, but with a 13-second period you'd think there'd be some energy. There isn't. The water's sitting at 65°F, which is much warmer than normal, but you won't be getting wet for the waves. The whole first week is a write-off. Wednesday and Thursday keep that pathetic 0.3ft to 0.7ft of swell, and while the wind tries to go cross-off a few times, there's just no wave to ride. It's a flat spell with a bit of breeze.
We finally see a pulse of energy on Friday the 28th morning. A 3ft SW swell with moderate energy (118) pops up, but it's coming with a cross-onshore wind that's got the surface all choppy. Not worth the paddle. Saturday the 29th sees the swell jump to 6ft from the SW, and the combined energy gets to 275, which is moderate. But the wind is howling from the W at 22 mph, making for a lumpy, cross-shore mess. By the afternoon it drops to 4ft and the wind backs off a touch, but it's still not clean.
From Sunday the 30th right through to Monday the 7th of September, it's a nightmare of onshores, strong winds, and blown-out conditions. We get a few swells in the 5ft to 8ft range – Monday the 31st has a 3ft WSW swell, but it's lumpy. Tuesday the 1st of September brings a proper 8ft SSW swell with strong energy (838), but the wind is a near gale from the SSW at 31 mph. That's expert-only, blown-out chaos. Honestly, with that much wind and swell, Porth Ceriad looks more interesting for kite surfing than paddle surfing.
The second week doesn't get much better. Wednesday the 2nd has a 6ft swell but more strong cross-shore winds. Thursday the 3rd is a write-off with a severe gale. Friday the 4th sees the swell drop right back to 3ft. There's a brief moment on Saturday the 5th afternoon where a 5ft SW swell with a 9-second period and clean, cross-off wind from the WNW at 25 mph gives us some hope, but it's a long way out and the confidence is low. By Sunday the 6th, it's back to onshores and messy conditions.
Look, there's no standout here. Not a single session worth circling on the calendar. When you see scores of zero across the board, you know it's time to find something else to do. The only thing close to decent is that Saturday the 5th afternoon window, but that's over a week away and the forecast could easily turn to rubbish.
Stay patient, lads. It tends not to stay this poor for long, but this is a rough patch.
Rusty.
Short Range ForecastLight rain (total 4mm), mostly falling on Thu afternoon. Warm (max 23°C on Tue afternoon, min 16°C on Thu night). Winds decreasing (strong winds from the E on Tue night, light winds from the NE by Wed afternoon). | Days 4-6 Weather SummaryHeavy rain (total 22mm), heaviest during Sun morning. Very mild (max 18°C on Sat night, min 14°C on Sun night). Winds increasing (light winds from the W on Sat night, near gales from the W by Sun night). | ||||||||||||||||||||
Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | |||||||||||||||
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) | E 3 | SW 13 | ESE 4 | SSW 8 | SSW 8 | W 12 | SW 12 | W 12 | SSW 4 | SW 8 | SW 7 | SW 6 | SW 6 | SW 8 | SW 9 | SW 9 | SW 8 | SW 7 | SW 8 | WSW 8 | SW 5 |
Wave Graph | |||||||||||||||||||||
7 | 7 | 19 | 6 | 6 | 3 | 6 | 3 | 16 | 95 | 26 | 83 | 275 | 182 | 129 | 107 | 53 | 47 | 35 | 103 | 74 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | cross | cross | cross-off | cross-off | cross-off | cross-on | on | cross-on | cross-on | cross-on | cross | cross | cross | on | cross-on | cross | cross-off | cross | cross-on |
High Tide | 7:46PM3.59m | 8:04AM3.49m | 8:20PM3.91m | 8:37AM3.75m | 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 | ||||||||
Low Tide | 2:25PM1.03m | 2:53AM0.81m | 3:01PM0.77m | 3:27AM0.54m | 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 | ||||||||
6:15 | — | — | 6:16 | — | — | 6:18 | — | — | 6:20 | — | — | 6:22 | — | — | 6:22 | — | — | 6:24 | — | — | |
— | 8:22 | — | — | 8:21 | — | — | 8:19 | — | — | 8:16 | — | — | 8:14 | — | — | 8:12 | — | — | 8:09 | — | |
mm | — | — | — | — | — | — | 2 | 2 | — | 1 | — | 5 | 1 | — | 1 | 10 | 2 | 2 | — | — | — |
Temp °C | 19 | 23 | 21 | 18 | 22 | 21 | 17 | 18 | 17 | 17 | 17 | 17 | 16 | 17 | 18 | 17 | 16 | 16 | 15 | 18 | 17 |
Feels °C | 17 | 18 | 13 | 16 | 21 | 20 | 15 | 14 | 14 | 14 | 15 | 13 | 10 | 14 | 16 | 11 | 9 | 8 | 8 | 13 | 12 |
Swell 1 Height (m) Direction Period (s) | SW 13 | SW 8 | SW 8 | SSW 8 | SSW 8 | SW 7 | S 7 | S 6 | SW 8 | SW 8 | SW 7 | SW 6 | — | SW 8 | SW 9 | NW 4 | SW 8 | SW 7 | SW 8 | NW 4 | — |
7 | 3 | 3 | 6 | 6 | 2 | 1 | 1 | 11 | 23 | 26 | 56 | — | 182 | 129 | 6 | 53 | 47 | 35 | 9 | — | |
Swell 2 Height (m) Direction Period (s) | SW 8 | SW 13 | SW 13 | W 13 | — | — | SW 12 | W 12 | SW 5 | — | — | NW 3 | — | — | — | NW 4 | NNW 4 | — | SW 10 | — | — |
3 | 7 | 7 | 3 | — | — | 6 | 3 | 1 | — | — | 2 | — | — | — | 3 | 1 | — | 15 | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | W 12 | W 12 | W 9 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | 3 | 3 | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | E 3 | E 3 | ESE 4 | ESE 3 | — | — | ESE 2 | — | SSW 4 | SW 8 | WSW 4 | SW 6 | SW 6 | NW 6 | W 4 | SW 9 | — | — | NW 4 | WSW 8 | SW 5 |
5 | 1 | 19 | 3 | — | — | 1 | — | 16 | 95 | 15 | 83 | 275 | 107 | 40 | 107 | — | — | 11 | 103 | 74 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 254 | 213 | 134 | 276 | 254 | 306 | 303 | 303 | 132 | 103 | 260 | 307 | 141 | 3 | 3 | 298 | 303 | 619 | 502 | 460 | 252 |
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.











