Surf Forecasts:
Porth Ceriad surf forecast from 15 Jul 2026:
- Most powerful swell: Wednesday 15 Jul, 4PM (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 4PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 4s period and expected on Saturday (Jul 18) at 1PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 4PM (Wed 15th Jul) | 0.5ft (0.1m) 16s |
Table - best surf conditions forecast for Porth Ceriad over the next 16 days.
The Lowdown
Alright, this is Rusty.
Look, I'm gonna level with you. I've been staring at the charts for Porth Ceriad, and it's a tough outlook. We're looking at a 16-day window that starts with a whole lot of nothing. The first week and a half are basically a write-off for any kind of decent surf. You'll see tiny, weak ripples in the water, but that's not surf, that's a lake. The good news is that there's a tiny glimmer of something in the second week, but it's a long, dry wait to get there.
From Wednesday the 15th of July right through to the morning of Tuesday the 28th, the swell is virtually non-existent. We're talking wave heights of 0.3 ft at best, and a combined energy reading that barely cracks single digits (values like 6, 9, 12). That's barely enough energy to ruffle your hair, let alone stand up on a board. The wind is all over the place, clean and glassy at times, but with no swell to push, it's a flat, pretty pond. The water temperature is a very unusual 66°F, which is a massive 7° warmer than what's normal for this time of year. It feels like a bath, but with no waves, you're just floating.
The only time we see a pulse of energy is on Wednesday the 29th of July. A weak, short-period 3 ft swell from the west rolls in, with the combined energy hitting 30. It's not much, but it's something. The problem is the wind turns onshore and choppy, making it a messy, bumpy mess. That trend continues into Thursday the 30th with a bit more energy (60) but still a 3 ft swell from the southwest with cross-onshore wind. The wave period is a pathetic 4 to 6 seconds, so it's just a weak, windswell bump. The setup looks more interesting for a kite surfer than a paddle surfer.
Honestly, for a spot like Porth Ceriad, which is fairly consistent, a blank run like this is a bit of a shocker. But it does happen. Forecasts can change, and the models might pick up something later, but right now, I wouldn't even bother checking the cam for the first ten days. The last couple of days of the outlook offer the only hope, but the quality is poor.
-Rusty
Short Range ForecastMostly dry. Warm (max 25°C on Wed night, min 14°C on Fri night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Very mild (max 19°C on Sun afternoon, min 13°C on Sun night). Winds decreasing (fresh winds from the NNW on Sat morning, calm 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 | W 13 | SW 14 | SW 14 | W 15 | W 12 | SW 12 | SW 13 | S 6 | NNW 5 | SW 11 | NW 5 | NNW 3 | N 3 | NNW 3 | NNW 4 | NW 6 | NNW 5 | NNW 5 | W 16 |
Wave Graph  | |||||||||||||||||||||
 kJ | 5 | 10 | 3 | 8 | 8 | 6 | 3 | 6 | 6 | 1 | 0 | 5 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 5 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | cross-off | glassy | cross-off | cross-off | cross-off | cross-off | off | off | off | cross-off | glassy | cross-off | off | off | 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 | 21 | 24 | 25 | 22 | 24 | 22 | 20 | 22 | 20 | 15 | 17 | 18 | 18 | 19 | 18 | 16 | 18 | 17 | 19 | 21 | 20 |
Feels °C | 22 | 21 | 22 | 21 | 20 | 18 | 17 | 18 | 17 | 8 | 10 | 15 | 16 | 15 | 15 | 11 | 14 | 13 | 18 | 18 | 18 |
Swell 1 Height (m) Direction Period (s) | — | SW 7 | N 3 | ESE 3 | SW 7 | SW 7 | SW 6 | SW 6 | SW 6 | S 6 | — | NNW 6 | NW 5 | — | NNW 4 | — | — | NNW 5 | NNW 5 | — | NNW 3 |
| kJ | — | 2 | 1 | 1 | 2 | 2 | 2 | 1 | 1 | 1 | — | 26 | 7 | — | 3 | — | — | 6 | 11 | — | 2 |
Swell 2 Height (m) Direction Period (s) | W 16 | SW 16 | SW 6 | — | SW 14 | SW 12 | W 12 | SW 12 | SW 13 | — | — | SW 11 | — | — | — | — | — | NW 6 | — | — | W 16 |
| kJ | 5 | 10 | 2 | — | 8 | 6 | 3 | 6 | 6 | — | — | 5 | — | — | — | — | — | 1 | — | — | 5 |
Swell 3 Height (m) Direction Period (s) | — | — | W 13 | SW 14 | W 8 | W 15 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | 3 | 8 | 1 | 4 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | E 3 | — | E 3 | E 3 | — | N 4 | NNW 4 | NNW 4 | N 4 | NNW 3 | NNW 5 | — | — | NNW 3 | N 3 | NNW 3 | NNW 4 | N 4 | — | NNW 5 | ENE 2 |
| kJ | 1 | — | 3 | 1 | — | 7 | 1 | 22 | 6 | 7 | 51 | — | — | 3 | 3 | 3 | 36 | 9 | — | 8 | 1 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 312 | 312 | 308 | 295 | 189 | 213 | 254 | 1565 | 303 | 319 | 319 | 223 | 261 | 312 | 303 | 303 | 377 | 103 | 254 | 270 | 303 |
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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