Surf Forecasts:
Porth Ceriad surf forecast from 20 Jul 2026:
- Most powerful swell: Saturday 25 Jul, 4PM (local time) - 3ft (0.9m), 4s period, WSW swell with 34 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 4s and forecast to arrive on Saturday (Jul 25) 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 5s period and expected on Wednesday (Jul 22) at 10AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 4PM (Sat 25th Jul) | 3ft (0.9m) 4s |
Table - best surf conditions forecast for Porth Ceriad over the next 16 days.
The Lowdown
Alright, listen up. Rusty here. Let's be straight with you: the next two weeks are looking pretty damn flat in this part of the world. We're in for a long stretch of quiet water, so don't be holding your breath for anything good.
Looking at the whole picture, the first real chance of a surfable wave—and I'm using that word loosely—doesn't even show up until Thursday, July 30th. That's a solid ten-day gap from the start of the forecast. The water is a very unusual 66°F at Porth Ceriad, way warmer than it should be for this time of year, but that's about the only thing out of the ordinary.
For the first week and a half, it's all flat. Monday the 20th through to Wednesday the 29th, the sea is giving us nothing. We're talking zero swell, just clean offshore winds blowing over a dead-calm ocean. It's pretty, but useless for a surfer.
Things finally try to stir on July 30th. Thursday afternoon, Porth Ceriad wakes up with a tiny 3ft swell from the WSW, but with a short, weak period of 5 seconds. The combined energy is a feeble 64. It's surfable, but it's ordinary. The wind is a gentle offshore from the NNW, so at least it'll be clean, but you're looking at little dribblers. Friday the 31st is much the same story: a slightly smaller 2ft swell from the SW with a period of 8 seconds, and a moderate offshore from the NNE keeping it tidy. Again, energy is low at 45.
After that, we slide right back into flatness through the first few days of August. There's a pulse of bigger swell on Monday, August 3rd—4ft to 4ft from the SW (moderate energy of 103), but it's all cross-onshore wind and choppy. The quality is poor, so it's a write-off. The setup at Porth Ceriad, being a beach, would be more interesting for kite surfing than paddle surfing on that day, honestly.
So, the whole two weeks? There's no standout. No hidden gem. The best you'll get is a few clean but tiny, weak waves on the 30th and 31st of July. For a beginner, it could be a fun little splash, but anyone else is better off waiting for the next proper swell.
Rusty.
Short Range ForecastMostly dry. Very mild (max 19°C on Wed afternoon, min 11°C on Tue night). Winds decreasing (fresh winds from the NNW on Mon afternoon, light winds from the N by Mon night). | Days 4-6 Weather SummaryLight rain (total 3mm), mostly falling on Sat morning. Warm (max 20°C on Thu night, min 14°C on Sat morning). Winds increasing (calm on Thu night, fresh winds from the WSW by Sat morning). | ||||||||||||||||||||
Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | Saturday 25 | Sunday 26 | |||||||||||||||
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 9 | NNW 4 | N 5 | NNW 5 | NNW 4 | W 16 | NNW 5 | NNW 5 | N 4 | NNW 5 | NNW 5 | — | W 13 | W 13 | — | W 3 | WSW 4 | SW 5 | SW 5 | WSW 5 | SW 6 |
Wave Graph  | |||||||||||||||||||||
 kJ | 2 | 0 | 0 | 0 | 0 | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 3 | 0 | 6 | 34 | 24 | 13 | 15 | 8 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | off | off | off | off | cross-off | off | off | cross-off | cross-off | off | cross | cross-off | cross | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 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 | 6:03AM3.01m | 6:32PM3.16m | 6:59AM3.15m | 7:22PM3.37m | ||||||||
Low Tide | 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 | 1:12PM1.43m | 1:49AM1.31m | 2:08PM1.25m | 2:38AM1.09m | ||||||||
 | |  | | |  |  | | | | | | | |  |  |  | | | | | |
 | 5:16 | — | — | 5:18 | — | — | 5:20 | — | — | 5:20 | — | — | 5:22 | — | — | 5:24 | — | — | 5:26 | — | — |
 | — | — | 9:30 | — | — | 9:28 | — | — | 9:27 | — | — | 9:25 | — | — | 9:23 | — | — | 9:22 | — | — | 9:21 |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 3 | — | — | — | — | — |
Temp °C | 15 | 15 | 16 | 15 | 17 | 15 | 15 | 19 | 18 | 17 | 19 | 20 | 17 | 17 | 18 | 15 | 16 | 17 | 15 | 17 | 17 |
Feels °C | 12 | 9 | 12 | 13 | 13 | 11 | 12 | 15 | 15 | 14 | 16 | 18 | 15 | 16 | 17 | 10 | 14 | 16 | 11 | 14 | 15 |
Swell 1 Height (m) Direction Period (s) | W 9 | — | — | — | — | W 16 | NNW 6 | — | NW 4 | — | — | — | W 3 | NW 3 | — | W 12 | W 12 | SW 5 | SW 5 | WSW 5 | SW 6 |
| kJ | 2 | — | — | — | — | 5 | 4 | — | 4 | — | — | — | 1 | 2 | — | 3 | 3 | 24 | 13 | 15 | 8 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | W 13 | W 13 | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | 3 | 3 | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | NNW 3 | NNW 4 | N 5 | NNW 5 | NNW 4 | N 4 | NNW 5 | NNW 5 | N 4 | NNW 5 | NNW 5 | — | — | — | — | W 3 | WSW 4 | — | NW 3 | NW 4 | NW 4 |
| kJ | 3 | 15 | 25 | 17 | 24 | 23 | 53 | 48 | 14 | 9 | 8 | — | — | — | — | 6 | 34 | — | 2 | 7 | 8 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 312 | 914 | 316 | 213 | 306 | 77 | 303 | 307 | 248 | 254 | 595 | 298 | 411 | 1031 | 303 | 373 | 629 | 125 | 437 | 129 | 125 |
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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