
Surf Forecasts:
Porth Ceriad surf forecast from 18 Jul 2026:
- Most powerful swell: Saturday 25 Jul, 4AM (local time) - 3ft (0.9m), 5s period, W swell with 36 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 4AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 5s period and expected on Wednesday (Jul 22) at 1PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 4AM (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 have a look at what’s on the cards for the next couple of weeks.
First off, I gotta be straight with you – the surf is flat as a pancake for a long stretch. We’re looking at a solid gap of almost no surf worth mentioning from now until the 24th of July. There’s just nothing to ride. The water’s sitting at 66°F – that’s 7°F warmer than usual for this time of year, which is pretty wild, but it ain’t gonna help the waves.
Things finally start to look a little more interesting around the 24th of July. On Friday morning, we’ve got a tiny 0.3ft swell from the West, with a period of 13 seconds. That’s a long period groundswell, so it’ll have some energy, but it’s tiny. The combined energy is only 4, so it’s weak. What’s nice is the wind is glassy – dead calm – so you’ll get clean, smooth conditions. But honestly, it’s barely a ripple.
The best chance in the whole 16-day window looks like the 27th of July, Monday morning. We’ve got a 3ft swell from the West-Southwest, with a period of 5 seconds – short period, so it’ll be a bit fat and weak. But the wind is offshore from the North at 9 mph, giving us clean, lined-up waves. The combined swell energy is 32, which is still weak, but it’s the best of a bad bunch. Porth Ceriad is exposed to the southwest, so that direction lines up. It’s a fairly consistent spot, and a beginner-friendly break. Crowds are often a thing here, so expect some company.
For the rest of the period, the 28th of July has a 3ft swell, but the wind is onshore or cross-onshore, so it’ll be choppy and messy. Not worth it.
So, to wrap it up: the standout is Monday the 27th of July morning for the best chance of a clean, small wave. Everything else is a write-off or close to it. Keep your eyes peeled for changes, but right now, it’s a waiting game.
Rusty.
Short Range ForecastMostly dry. Very mild (max 17°C on Sat afternoon, min 13°C on Sun night). Mainly fresh winds. | Days 4-6 Weather SummaryMostly dry. Very mild (max 19°C on Tue afternoon, min 12°C on Tue night). Winds decreasing (fresh winds from the NNW on Wed morning, calm by Thu night). | ||||||||||||||||||||
Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | |||||||||||||||
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 6 | S 5 | SW 11 | NNW 5 | NNW 3 | NW 4 | N 3 | W 8 | N 4 | NNW 5 | NNW 4 | W 16 | NNW 4 | NNW 5 | N 4 | NNW 5 | NW 5 | N 4 | W 13 | W 13 | WSW 4 |
Wave Graph | |||||||||||||||||||||
1 | 1 | 5 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 3 | 34 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | cross-off | cross-off | off | off | off | off | off | off | off | off | off | off | off | off | cross-off | cross-off | glassy | cross-on | cross-off |
High Tide | 11:43AM4.06m | 00:03AM4.51m | 12:29PM3.83m | 00:49AM4.19m | 1:15PM3.57m | 1:38AM3.80m | 2:07PM3.31m | 2:32AM3.43m | 3:07PM3.10m | 3:38AM3.13m | 4:19PM2.98m | 4:54AM2.99m | 5:31PM3.01m | ||||||||
Low Tide | 6:50PM0.46m | 7:26AM0.32m | 7:30PM0.68m | 8:08AM0.62m | 8:12PM0.93m | 8:49AM0.93m | 8:56PM1.18m | 9:34AM1.21m | 9:49PM1.39m | 10:30AM1.41m | 11:05PM1.51m | 11:50AM1.50m | 00:39AM1.48m | ||||||||
5:15 | — | — | 5:16 | — | — | 5:16 | — | — | 5:18 | — | — | 5:20 | — | — | 5:20 | — | — | 5:22 | — | — | |
— | — | 9:31 | — | — | 9:30 | — | — | 9:30 | — | — | 9:28 | — | — | 9:27 | — | — | 9:25 | — | — | 9:23 | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 17 | 17 | 16 | 17 | 17 | 14 | 16 | 17 | 17 | 19 | 17 | 15 | 16 | 15 | 15 | 18 | 18 | 16 | 17 | 17 |
Feels °C | 12 | 13 | 15 | 13 | 13 | 13 | 10 | 12 | 14 | 15 | 15 | 13 | 10 | 11 | 12 | 14 | 15 | 15 | 16 | 16 | 17 |
Swell 1 Height (m) Direction Period (s) | SW 6 | S 5 | N 5 | NNW 5 | — | NW 4 | — | W 8 | NW 4 | NNW 5 | — | W 16 | — | — | N 6 | — | — | N 4 | WNW 3 | NW 4 | — |
1 | 1 | 20 | 4 | — | 3 | — | 1 | 4 | 11 | — | 5 | — | — | 1 | — | — | 2 | 1 | 2 | — | |
Swell 2 Height (m) Direction Period (s) | — | — | SW 11 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | W 13 | — |
— | — | 5 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 3 | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | W 13 | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 3 | — | — | |
Wind waves Height (m) Direction Period (s) | NNW 3 | NNW 5 | — | — | NNW 3 | N 3 | N 3 | NNW 4 | N 4 | — | NNW 4 | N 4 | NNW 4 | NNW 5 | N 4 | NNW 5 | NW 5 | — | — | SW 3 | WSW 4 |
4 | 48 | — | — | 7 | 6 | 5 | 23 | 17 | — | 25 | 18 | 46 | 50 | 13 | 15 | 12 | — | — | 2 | 34 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 319 | 319 | 186 | 319 | 319 | 303 | 312 | 312 | 303 | 253 | 306 | 77 | 350 | 619 | 77 | 213 | 380 | 307 | 316 | 1072 | 308 |
Best forecast wave conditions in Lleyn Peninsula | |||||||||||||||||||||
Best forecast wave conditions in United Kingdom | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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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.










