Surf Forecasts:
Porth Ceriad surf forecast from 6 Jul 2026:
- Most powerful swell: Monday 6 Jul, 10PM (local time) - 3ft (0.9m), 5s period, SW swell with 35 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 5s and forecast to arrive on Monday (Jul 06) at 10PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 6s period and expected on Saturday (Jul 11) at 4PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 10PM (Mon 6th Jul) | 3ft (0.9m) 5s |
Table - best surf conditions forecast for Porth Ceriad over the next 16 days.
Updates in hr min s Forecast update imminent
Alright folks, Rusty here. Let’s break down what’s coming for the next couple of weeks. Gotta be honest – it’s a slow start, but there is a light at the end of the tunnel if you can hang in there.
We’re looking at a long, flat spell to kick things off. From Monday the 6th of July right through to at least Thursday the 16th of July, it’s basically a no-go. We’ve got tiny little bumps of swell, but the wave report says it all: poor surf conditions. Even when the wind is glassy or blowing offshore, there’s just no energy in the water to make it worth the paddle. The combined swell energy is in the single digits or very low double digits (like 16 for the best of it). It’s a proper dry spell.
Then, things finally start to show some life. On Friday the 17th of July in the morning, we see a little pulse. The swell comes up to 3ft from the SW, with a period of 7 seconds, and the combined energy hits 94. The wind is light and cross-offshore from the NE. It’s described as “surfable waves but very ordinary conditions” – so, small and a bit weak, but at least you can get wet.
It builds through the weekend, but the real standout arrives on Monday the 20th of July. This is the one to circle on the calendar. Porth Ceriad wakes up with a solid 6ft swell from the WSW, period around 7 seconds. The combined swell energy jumps to a strong 302, which is a serious step up in power. The wind is offshore from the N in the morning, a light breeze, keeping it clean. This is your best chance for a proper session – a decent sized, clean, offshore day at an exposed break. The afternoon stays solid at 5ft and 243 energy with a moderate offshore breeze.
Then Tuesday the 21st of July looks even cleaner. The morning is absolutely glassy with no wind and a solid 6ft swell from the WSW, energy at 200. That is prime, clean surf. The water temp is sitting at 63°F, which is a notable 5°F warmer than normal for this time of year, so that’s a bonus – you might get away with a spring suit.
Overall, it’s a tough two weeks for surf. You’ve got over a week of nothing, then a couple of ordinary days, and then a two-day window around the 20th and 21st that looks genuinely solid. If you can wait for that Monday, it’ll be worth it.
Rusty.
Short Range ForecastMostly dry. Warm (max 20°C on Wed afternoon, min 15°C on Mon morning). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 26°C on Fri afternoon, min 17°C on Thu morning). Wind will be generally light. | ||||||||||||||||||||
Monday 6 | Tuesday 7 | Wednesday 8 | Thursday 9 | Friday 10 | Saturday 11 | Sunday 12 | |||||||||||||||
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 4 | SW 5 | SW 5 | SW 5 | NW 4 | W 12 | W 8 | — | — | — | NW 3 | W 12 | W 10 | W 11 | W 8 | W 8 | W 8 | W 8 | SE 4 | NNW 4 | E 3 |
Wave Graph  | |||||||||||||||||||||
 kJ | 16 | 22 | 30 | 6 | 3 | 3 | 1 | 0 | 0 | 0 | 0 | 3 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 0 | 5 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | glassy | on | on | glassy | cross-on | on | off | off | cross-off | off | off | off | off | cross-off | cross | cross-on | cross-off | cross |
High Tide | 1:02PM3.51m | 1:23AM3.85m | 1:52PM3.41m | 2:16AM3.70m | 2:52PM3.32m | 3:19AM3.57m | 4:02PM3.32m | 4:32AM3.54m | 5:13PM3.44m | 5:43AM3.64m | 6:18PM3.68m | 6:47AM3.84m | 7:16PM3.99m | ||||||||
Low Tide | 7:56PM1.09m | 8:39AM0.94m | 8:39PM1.19m | 9:26AM1.02m | 9:32PM1.27m | 10:24AM1.08m | 10:44PM1.28m | 11:38AM1.08m | 00:14AM1.18m | 1:00PM0.98m | 1:36AM0.93m | 2:09PM0.78m | 2:41AM0.60m | ||||||||
 | |  | |  |  | | | | | | | | | | | | | | | | |
 | 5:01 | — | — | 5:01 | — | — | 5:03 | — | — | 5:03 | — | — | 5:05 | — | — | 5:05 | — | — | 5:07 | — | — |
 | — | — | 9:43 | — | — | 9:42 | — | — | 9:42 | — | — | 9:40 | — | — | 9:39 | — | — | 9:38 | — | — | 9:37 |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 16 | 17 | 18 | 16 | 18 | 18 | 19 | 20 | 19 | 19 | 21 | 22 | 24 | 26 | 24 | 24 | 26 | 26 | 20 | 24 | 24 |
Feels °C | 14 | 15 | 17 | 16 | 17 | 17 | 20 | 21 | 19 | 19 | 21 | 21 | 23 | 24 | 21 | 23 | 24 | 25 | 21 | 21 | 21 |
Swell 1 Height (m) Direction Period (s) | — | NW 4 | SW 5 | SW 5 | NW 4 | WSW 4 | — | — | — | — | — | — | W 10 | W 11 | W 8 | W 7 | W 8 | NNW 6 | ESE 3 | — | — |
| kJ | — | 1 | 30 | 6 | 3 | 1 | — | — | — | — | — | — | 2 | 2 | 1 | 1 | 1 | 25 | 1 | — | — |
Swell 2 Height (m) Direction Period (s) | — | — | — | NW 4 | SW 4 | — | W 8 | — | — | — | — | — | — | — | — | — | W 8 | W 8 | NNW 4 | — | N 5 |
| kJ | — | — | — | 4 | 3 | — | 1 | — | — | — | — | — | — | — | — | — | 1 | 1 | 1 | — | 1 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | W 12 | — | — | — | — | — | W 12 | — | — | — | W 8 | — | — | SE 4 | — | — |
| kJ | — | — | — | — | — | 3 | — | — | — | — | — | 3 | — | — | — | 1 | — | — | 1 | — | — |
Wind waves Height (m) Direction Period (s) | SW 4 | SW 5 | — | — | — | — | WSW 3 | — | — | — | NW 3 | NNE 3 | — | — | N 4 | NNW 6 | NNW 6 | E 3 | — | NNW 4 | E 3 |
| kJ | 16 | 22 | — | — | — | — | 1 | — | — | — | 1 | 1 | — | — | 7 | 85 | 100 | 6 | — | 1 | 5 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 296 | 296 | 296 | 289 | 317 | 213 | 199 | 306 | 199 | 298 | 289 | 186 | 133 | 133 | 186 | 213 | 239 | 213 | 319 | 312 | 295 |
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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