Surf Forecasts:
Porth Ceriad surf forecast from 15 Jul 2026:
- Most powerful swell: Wednesday 15 Jul, 7PM (local time) - 0.5ft (0.1m), 16s period, SW swell with 10 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 16s and forecast to arrive on Wednesday (Jul 15) at 7PM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 5s period and expected on Saturday (Jul 18) at 4PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 7PM (Wed 15th Jul) | 0.5ft (0.1m) 16s |
Table - best surf conditions forecast for Porth Ceriad over the next 16 days.
The Lowdown
Hey, Rusty here. Look, I’ll be straight with you – this 16-day stretch at Porth Ceriad is a tough one. From Wednesday the 15th of July all the way through to the end of the month, we’re looking at pretty much a blank run. The water’s sitting at 66° which is a solid 7° warmer than usual for this time of year – that’s a very unusual anomaly, but honestly, with no swell to enjoy it, it’s just a curiosity.
The first week and a half offers nothing rideable. Mornings and afternoons are either flat or showing a pathetic 0.3ft – that’s barely a ripple, even if the wind is offshore or glassy. The combined swell energy never climbs above single digits for most of that time. There’s a bit of a tease on the 18th and 19th with clean offshore conditions, but the surf is a big fat zero. By the 21st we get a glassy morning, still no waves. This pattern repeats right up to the 29th – tiny little bumps, but nothing that would get you out of bed.
Then on Thursday the 30th of July, there’s a last-minute whisper of hope. The morning shows 4ft from the west with a short 5-second period, combined energy a meagre 51. It’s cross-onshore and choppy – not great. The afternoon cleans up a bit: 3ft, light cross-off breeze, period still 5 seconds, energy dropping to 45. It’s surfable but very ordinary conditions, according to the numbers. For a beginner-friendly spot like Porth Ceriad, that tiny swell might be enough for a longboard or a foamie, but it’s hardly a standout. Crowds are often a thing here, but I doubt many will bother.
Overall, there’s no good surf on offer in this 16-day window. Porth Ceriad is usually fairly consistent, so this run of flatness is a bit of a surprise. Forecasts can change, but for now, I’d leave the boards in the car and take a walk along the coast instead.
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Wed night, min 13°C on Fri night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Very mild (max 18°C on Sun morning, min 13°C on Sat morning). Winds decreasing (fresh winds from the NNW on Sat afternoon, light winds from the NW by Sun morning). | ||||||||||||||||||||
Wednesday 15 | Thursday 16 | Friday 17 | Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | |||||||||||||||
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 16 | SW 16 | E 3 | SW 14 | SW 14 | SW 12 | W 12 | SW 12 | SW 13 | S 6 | S 5 | SW 11 | NNW 5 | NNW 4 | W 10 | W 9 | NNW 4 | N 4 | NNW 5 | NNW 3 | W 16 |
Wave Graph  | |||||||||||||||||||||
 kJ | 5 | 10 | 4 | 8 | 8 | 6 | 3 | 6 | 6 | 1 | 1 | 5 | 0 | 0 | 2 | 2 | 0 | 0 | 0 | 0 | 5 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | cross | cross-off | cross-off | cross-off | off | cross-off | off | off | off | off | cross-off | cross-off | off | off | cross-off | off | glassy | cross-off | off |
High Tide | 9:46PM4.77m | 10:12AM4.33m | 10:33PM4.82m | 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 | ||||||||
Low Tide | 4:42PM0.26m | 5:14AM-0.07m | 5:26PM0.24m | 6:00AM-0.05m | 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 | ||||||||
 | |  |  | |  | | | | | | | | | | | | | | | | |
 | 5:11 | — | — | 5:11 | — | — | 5:13 | — | — | 5:15 | — | — | 5:16 | — | — | 5:16 | — | — | 5:18 | — | — |
 | — | — | 9:36 | — | — | 9:34 | — | — | 9:32 | — | — | 9:31 | — | — | 9:30 | — | — | 9:30 | — | — | 9:28 |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 20 | 24 | 26 | 22 | 24 | 22 | 20 | 22 | 20 | 16 | 17 | 17 | 18 | 18 | 17 | 14 | 16 | 17 | 18 | 19 | 18 |
Feels °C | 20 | 21 | 22 | 22 | 21 | 18 | 17 | 17 | 16 | 12 | 11 | 14 | 16 | 14 | 13 | 10 | 12 | 14 | 17 | 16 | 15 |
Swell 1 Height (m) Direction Period (s) | W 16 | — | N 3 | ESE 3 | SW 7 | NNW 4 | SW 6 | SW 6 | SW 6 | S 6 | S 5 | SW 11 | NNW 5 | — | W 10 | W 9 | — | NW 4 | NNW 5 | — | W 16 |
| kJ | 5 | — | 1 | 1 | 2 | 5 | 2 | 1 | 1 | 1 | 1 | 5 | 10 | — | 2 | 2 | — | 4 | 11 | — | 5 |
Swell 2 Height (m) Direction Period (s) | — | SW 7 | SW 6 | SW 14 | SW 14 | SW 7 | W 12 | SW 12 | SW 13 | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | 2 | 2 | 8 | 8 | 2 | 3 | 6 | 6 | — | — | — | — | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | S 6 | SW 16 | W 13 | SW 6 | W 8 | SW 12 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 1 | 10 | 3 | 1 | 1 | 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | ESE 3 | — | E 3 | — | — | ENE 3 | NNW 4 | NNW 4 | N 3 | NNW 3 | NNW 5 | NNW 5 | — | NNW 4 | N 4 | NNW 3 | NNW 4 | N 4 | — | NNW 3 | NNW 4 |
| kJ | 1 | — | 4 | — | — | 1 | 1 | 28 | 6 | 5 | 59 | 25 | — | 12 | 9 | 9 | 21 | 20 | — | 3 | 5 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 335 | 133 | 200 | 295 | 189 | 213 | 308 | 1322 | 303 | 319 | 319 | 223 | 248 | 312 | 303 | 319 | 377 | 213 | 253 | 261 | 254 |
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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