Surf Forecasts:
Porth Ceriad surf forecast from 17 Jul 2026:
- Most powerful swell: Friday 17 Jul, 1PM (local time) - 0.5ft (0.1m), 12s period, SW swell with 6 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 0.1m 12s and forecast to arrive on Friday (Jul 17) at 1PM. 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 | 1PM (Fri 17th Jul) | 0.5ft (0.1m) 12s |
Table - best surf conditions forecast for Porth Ceriad over the next 16 days.
The Lowdown
Alright, grab a coffee and listen up. I'm not gonna sugarcoat it because the ocean ain't giving us much right now.
I’ve been scanning the charts for Porth Ceriad, and it’s a tough run. The whole 16-day window is pretty much a flat spell. We’re looking at a solid two-week gap from the start, through the end of July, with nothing worth paddling out for. The energy just isn't there. The water is a weird 66°F right now, which is much warmer than normal for this time of year, but that's about the only thing that's out of the ordinary.
The first real glimmer, and I mean a tiny glimmer, shows up on the morning of Friday the 31st of July. We’ve got a tiny 3ft swell coming from the ESE, but it’s a rubbish period of only 4 seconds – that’s just wind chop, no power behind it. The combined energy is a weak (17) and the wind is light and cross-shore, so it’ll be a messy, gutless little wave. This is strictly for the die-hards who just want to get wet. It’s not a standout in any way, shape, or form.
After that, it fades back to nothing again. Porth Ceriad is an exposed spot, and it’s at the mercy of the big blue. When the swell is this absent, it’s just a pretty beach. Save your energy and wax for another day.
Rusty.
Short Range ForecastMostly dry. Warm (max 20°C on Fri afternoon, min 13°C on Fri night). Winds decreasing (fresh winds from the NNW on Sat afternoon, calm by Sun morning). | Days 4-6 Weather SummaryMostly dry. Warm (max 20°C on Tue afternoon, min 13°C on Tue night). Winds increasing (light winds from the NNE on Mon night, fresh winds from the NNW by Wed morning). | ||||||||||||||||||||
Friday 17 | Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | |||||||||||||||
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) | W 12 | SW 12 | SW 13 | SW 6 | S 5 | SW 11 | NNW 4 | NNW 2 | N 3 | NNW 5 | NNW 4 | W 8 | NNW 5 | NNW 4 | W 16 | NNW 4 | NNW 5 | NNW 6 | NW 6 | NNW 5 | N 3 |
Wave Graph  | |||||||||||||||||||||
 kJ | 3 | 6 | 6 | 1 | 1 | 5 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 5 | 0 | 0 | 0 | 1 | 0 | 0 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | off | off | off | cross-off | glassy | cross-off | off | off | off | off | off | off | off | off | off | off | off | off | cross-off |
High Tide | 10:58AM4.23m | 11:18PM4.74m | 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 | ||||||||
Low Tide | 6:08PM0.31m | 6:44AM0.09m | 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 | ||||||||
 | |  |  | |  | | | | | | | | | | | | | | | | |
 | 5:13 | — | — | 5:15 | — | — | 5:16 | — | — | 5:16 | — | — | 5:18 | — | — | 5:20 | — | — | 5:20 | — | — |
 | — | — | 9:32 | — | — | 9:31 | — | — | 9:30 | — | — | 9:30 | — | — | 9:28 | — | — | 9:27 | — | — | 9:25 |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 19 | 20 | 19 | 14 | 17 | 18 | 17 | 17 | 17 | 15 | 18 | 18 | 19 | 20 | 18 | 15 | 17 | 16 | 16 | 20 | 19 |
Feels °C | 15 | 15 | 14 | 7 | 13 | 15 | 15 | 14 | 13 | 11 | 14 | 14 | 18 | 16 | 13 | 8 | 11 | 12 | 15 | 17 | 16 |
Swell 1 Height (m) Direction Period (s) | SW 6 | SW 6 | SW 6 | SW 6 | S 5 | N 5 | NNW 4 | — | NNW 3 | — | — | W 8 | NNW 5 | — | W 16 | — | — | — | — | — | — |
| kJ | 2 | 1 | 1 | 1 | 1 | 20 | 2 | — | 2 | — | — | 1 | 2 | — | 5 | — | — | — | — | — | — |
Swell 2 Height (m) Direction Period (s) | W 12 | SW 12 | SW 13 | — | — | SW 11 | — | — | — | — | — | — | — | — | — | — | — | — | NW 6 | — | — |
| kJ | 3 | 6 | 6 | — | — | 5 | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | NNW 3 | NNW 4 | N 3 | NNW 4 | NNW 5 | ENE 2 | — | NNW 2 | N 3 | NNW 5 | NNW 4 | N 4 | NNW 5 | NNW 4 | N 4 | NNW 4 | NNW 5 | NNW 6 | NNW 6 | NNW 5 | N 3 |
| kJ | 1 | 16 | 6 | 16 | 52 | 1 | — | 1 | 6 | 8 | 25 | 13 | 10 | 19 | 14 | 41 | 50 | 33 | 18 | 23 | 4 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 308 | 1565 | 325 | 319 | 319 | 319 | 319 | 304 | 303 | 312 | 325 | 303 | 248 | 296 | 77 | 317 | 319 | 77 | 270 | 354 | 307 |
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.
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