Surf Forecasts:
Porth Ceriad surf forecast from 28 Jul 2026:
- Most powerful swell: Tuesday 4 Aug, 1AM (local time) - 5ft (1.6m), 7s period, SW swell with 234 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 1.6m 7s and forecast to arrive on Tuesday (Aug 04) at 1AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Thursday (Jul 30) at 4AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 1AM (Tue 4th Aug) | 5ft (1.6m) 7s |
Table - best surf conditions forecast for Porth Ceriad over the next 16 days.
The Lowdown
Imperial Version
Alright folks, Rusty here. Let me tell you straight up, it’s a rough patch ahead for the Porth Ceriad area. We’re looking at a 16-day window that’s got a whole lot of nothing in the early going, and even when things try to pick up, the conditions are fighting it every step of the way.
We start with a dry spell. From Tuesday the 28th of July all the way through to Monday the 3rd of August, there’s just nothing worth paddling out for. The wave energy is weak, barely cracking double digits, with tiny swell heights and chunky, short-period windswell. The wind is mostly cross-on or onshore, making a mess of things. It’s a write-off.
Tuesday the 4th of August finally shows a pulse of energy. The swell pushes up to 4ft from the SW with a period of 8 seconds, and the combined energy jumps to 182 (moderate energy). That’s the biggest number we see for a while. But – and it’s a big but – the wind is a fresh cross-onshore at 19 mph. That’s going to chop it up and make it lumpy. The water temperature is sitting at 64°F which is a notable 4°F warmer than usual for this time of year, so at least you won’t need a thick wetsuit, but the surf quality is going to be poor. It’s not a total loss for a beginner who just wants to get wet on a fairly consistent break, but don’t expect any beauty waves.
Wednesday the 5th of August is more of the same: 4ft swell from the WSW, but again that persistent cross-onshore wind at 16 mph. The energy drops back to 76 (weak). It’s messy. We then get a slump again through the 6th, 7th, and 8th, with tiny surf and poor or onshore wind.
The best window we can see is from Sunday the 9th of August into Tuesday the 11th. The swell is nothing special – only 3ft on Sunday morning from the SW, with a period of 7 seconds – but the wind turns cross-offshore from the WNW. That gives us clean conditions. The energy is a weak 59 (weak energy), so it’s small and weak, but at least it’s clean. Monday the 10th holds those clean, cross-off winds, though the swell stays tiny. The standout moment, if you can call it that, is Sunday the 9th morning. It’s the best of a bad bunch. The swell is coming from the SW, which is the optimum direction for this spot, and with the cross-off wind, it’ll be the cleanest we get. But don’t get your hopes up – it’s a small day for beginners only.
After that, the window closes again. The last few days show tiny surf and winds that are either cross-off or back onshore. Honestly, for the next two weeks, Porth Ceriad is a bust. The consistent nature of the break means it won’t stay this poor forever, but for this forecast, it’s a hard pass.
Rusty.
Short Range ForecastMostly dry. Very mild (max 18°C on Tue afternoon, min 14°C on Wed night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 23°C on Sun night, min 13°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Tuesday 28 | Wednesday 29 | Thursday 30 | Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | |||||||||||||||
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 5 | SW 5 | WSW 5 | SW 4 | SW 4 | SW 5 | W 4 | NW 4 | SW 5 | SW 5 | SW 3 | WSW 5 | WSW 5 | SW 5 | WSW 4 | SW 8 | SW 8 | WSW 9 | SW 8 | WSW 8 | SW 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 65 | 42 | 15 | 16 | 8 | 22 | 20 | 12 | 6 | 5 | 2 | 36 | 9 | 3 | 3 | 3 | 3 | 8 | 18 | 26 | 234 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | on | cross-on | cross-off | cross-off | cross-on | cross-on | cross-on | cross-on | cross-off | cross-off | glassy | glassy | cross | off | cross-on | cross | cross-on | on |
High Tide | 8:41PM3.85m | 8:59AM3.68m | 9:16PM4.07m | 9:32AM3.82m | 9:49PM4.25m | 10:06AM3.92m | 10:23PM4.38m | 10:40AM3.99m | 10:57PM4.42m | 11:15AM4.00m | 11:32PM4.39m | 11:53AM3.96m | 00:11AM4.27m | ||||||||
Low Tide | 3:28PM0.83m | 3:55AM0.66m | 4:02PM0.66m | 4:30AM0.51m | 4:35PM0.55m | 5:04AM0.42m | 5:09PM0.50m | 5:38AM0.39m | 5:41PM0.53m | 6:12AM0.44m | 6:13PM0.62m | 6:46AM0.54m | 6:45PM0.75m | ||||||||
 | |  | | |  |  | | | | | | | | | | | | | | | |
 | 5:28 | — | — | 5:30 | — | — | 5:31 | — | — | 5:33 | — | — | 5:35 | — | — | 5:37 | — | — | 5:37 | — | — |
 | — | — | 9:17 | — | — | 9:16 | — | — | 9:15 | — | — | 9:13 | — | — | 9:12 | — | — | 9:09 | — | — | 9:07 |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 17 | 18 | 17 | 18 | 18 | 17 | 14 | 15 | 15 | 14 | 15 | 16 | 14 | 15 | 15 | 18 | 22 | 23 | 20 | 20 | 19 |
Feels °C | 14 | 16 | 15 | 16 | 15 | 15 | 9 | 12 | 12 | 13 | 11 | 12 | 11 | 12 | 13 | 16 | 19 | 21 | 18 | 18 | 18 |
Swell 1 Height (m) Direction Period (s) | — | — | WSW 5 | SW 5 | — | SW 5 | — | WSW 5 | SW 5 | NW 4 | NW 4 | W 11 | WSW 5 | NW 4 | WSW 4 | — | SW 8 | WSW 9 | SW 8 | WSW 8 | — |
| kJ | — | — | 15 | 5 | — | 22 | — | 8 | 6 | 5 | 2 | 2 | 9 | 2 | 1 | — | 3 | 8 | 18 | 26 | — |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | NW 4 | NW 4 | SW 5 | — | — | W 9 | SW 5 | SW 8 | SW 8 | — | N 3 | — | — | — |
| kJ | — | — | — | — | — | — | — | 12 | 1 | 5 | — | — | 2 | 3 | 3 | 3 | — | 1 | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | W 9 | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SW 5 | SW 5 | — | SW 4 | SW 4 | — | W 4 | — | NNW 4 | — | SW 3 | WSW 5 | NW 4 | — | — | — | — | — | SE 3 | S 4 | SW 7 |
| kJ | 65 | 42 | — | 16 | 8 | — | 20 | — | 1 | — | 2 | 36 | 5 | — | — | — | — | — | 2 | 9 | 234 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 255 | 280 | 253 | 296 | 298 | 298 | 634 | 532 | 304 | 304 | 533 | 533 | 305 | 317 | 186 | 298 | 248 | 113 | 132 | 70 | 47 |
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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