Surf Forecasts:
Porth Ceriad surf forecast from 19 Aug 2026:
- Most powerful swell: Wednesday 26 Aug, 1AM (local time) - 4.5ft (1.3m), 9s period, SW swell with 262 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 1.3m 9s and forecast to arrive on Wednesday (Aug 26) at 1AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 5s period and expected on Thursday (Aug 20) at 4PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 1AM (Wed 26th Aug) | 4.5ft (1.3m) 9s |
Table - best surf conditions forecast for Porth Ceriad over the next 16 days.
The Lowdown
Alright folks, Rusty here. Gonna be honest with you straight up, the next 16 days are looking pretty grim for Porth Ceriad. We've got a real dry spell on our hands, so let's get into it.
Right from the start, Wednesday the 19th through to the end of August, the surf is basically non-existent. We're talking tiny, weak waves, mostly under 0.3 ft, with a few knee-high blips that have shocking 4-second periods. The wind is a mess – cross-shore, onshore, and strong – and the combined energy of all swells is just pathetic, barely reaching double digits (27).
This flat spell runs all the way through to the end of the month. There's a tiny pulse of 2 ft on the 25th, but with a 4-second period and cross-onshore wind, it's a complete write-off.
Then, on the 30th, we see a bit of a bump, but it's still not surfable. The swell picks up to 5 ft on Sunday morning with a 6-second period, and the wind is clean cross-offshore. However, the energy is still low (186) and the score is a zero. It's just not coming together. The afternoon of the 30th sees 7 ft (374 energy) but still a 7-second period, which is too short and lumpy to be any good.
Finally, on the very last day of the forecast, Monday the 31st of August, we get our only real blip of potential. The morning sees a 6 ft swell from the WSW with a 9-second period and clean cross-offshore winds. The energy jumps to 549, which is a solid pulse. This is a bigger swell, over 5 ft, so it's not for beginners, and with a period under 11 seconds, it's not a classic groundswell. But it's the only window where the conditions are even close to being worth a look. The afternoon of the 31st gets messy again with strong cross-shore winds. After that, it's back to small, weak, and messy for the first couple of days of September.
For a break that's exposed and fairly consistent, this is a really tough run. The water temp is about what you'd expect for this time of year. Honestly, with sustained onshore and cross-shore winds and a lot of lumpy, choppy conditions, the setup here looks more interesting for kite surfing than paddle surfing for most of this period.
If you're desperate, keep an eye on the morning of the 31st of August, but don't hold your breath.
Rusty.
Short Range ForecastModerate rain (total 13mm), heaviest on Wed night. Very mild (max 17°C on Wed night, min 13°C on Thu night). Mainly fresh winds. | Days 4-6 Weather SummaryMostly dry. Very mild (max 19°C on Mon afternoon, min 12°C on Sat night). Wind will be generally light. | ||||||||||||||||||||
Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | |||||||||||||||
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) | WSW 4 | SW 4 | WSW 6 | SW 7 | SW 7 | SW 6 | SW 13 | W 16 | W 16 | SW 15 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 13 | SW 13 | SSW 4 | SW 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 17 | 16 | 90 | 46 | 22 | 10 | 7 | 7 | 7 | 9 | 9 | 8 | 8 | 7 | 8 | 8 | 7 | 7 | 7 | 12 | 262 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross-off | cross-off | off | off | off | cross-off | off | off | off | off | off | off | cross-off | cross | cross-off | cross | cross-on | cross-on | cross-on |
High Tide | 1:17PM3.43m | 1:41AM3.34m | 2:05PM3.11m | 2:38AM2.96m | 3:15PM2.85m | 4:06AM2.73m | 4:55PM2.79m | 5:42AM2.76m | 6:14PM2.97m | 6:45AM2.97m | 7:07PM3.26m | 7:28AM3.22m | 7:46PM3.59m | ||||||||
Low Tide | 7:50AM1.04m | 7:58PM1.17m | 8:25AM1.34m | 8:46PM1.43m | 9:17AM1.59m | 10:04PM1.63m | 10:53AM1.71m | 00:05AM1.62m | 12:43PM1.59m | 1:27AM1.39m | 1:44PM1.32m | 2:15AM1.10m | 2:25PM1.03m | 2:53AM0.81m | |||||||
 | |  | |  |  |  | |  |  | | | | | | | | | | | | |
 | 6:05 | — | — | 6:07 | — | — | 6:07 | — | — | 6:09 | — | — | 6:11 | — | — | 6:13 | — | — | 6:15 | — | — |
 | — | 8:37 | — | — | 8:34 | — | — | 8:31 | — | — | 8:30 | — | — | 8:28 | — | — | 8:25 | — | — | 8:22 | — |
mm | 1 | 1 | 6 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 16 | 17 | 15 | 16 | 14 | 14 | 15 | 14 | 14 | 15 | 14 | 15 | 16 | 16 | 17 | 19 | 18 | 16 | 17 | 16 |
Feels °C | 11 | 11 | 14 | 10 | 10 | 10 | 9 | 10 | 10 | 10 | 10 | 10 | 12 | 12 | 13 | 15 | 15 | 14 | 14 | 15 | 13 |
Swell 1 Height (m) Direction Period (s) | W 16 | NW 4 | SW 16 | SW 7 | SW 7 | SW 6 | WSW 6 | WSW 6 | SW 6 | SW 15 | SW 15 | SW 15 | NNW 5 | SW 14 | SW 14 | SW 14 | SW 14 | SW 13 | WSW 3 | SW 13 | SW 9 |
| kJ | 5 | 2 | 10 | 46 | 22 | 10 | 3 | 3 | 1 | 9 | 9 | 8 | 4 | 7 | 8 | 8 | 7 | 7 | 1 | 7 | 262 |
Swell 2 Height (m) Direction Period (s) | W 16 | — | — | SW 15 | SW 14 | SW 14 | SW 13 | SW 13 | SW 13 | W 6 | W 12 | W 12 | SW 14 | W 9 | — | — | — | — | SW 13 | — | — |
| kJ | 5 | — | — | 8 | 8 | 8 | 7 | 7 | 7 | 1 | 3 | 3 | 8 | 2 | — | — | — | — | 7 | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | W 14 | — | W 16 | W 16 | W 10 | — | W 12 | — | — | W 8 | — | — | W 8 | — | — | — |
| kJ | — | — | — | — | — | 4 | — | 5 | 5 | 2 | — | 3 | — | — | 1 | — | — | 1 | — | — | — |
Wind waves Height (m) Direction Period (s) | WSW 4 | SW 4 | WSW 6 | NW 4 | NNW 5 | NNW 4 | NW 5 | NW 4 | NNW 4 | NNW 5 | NNW 4 | NNW 3 | — | NW 4 | — | — | — | — | S 3 | SSW 4 | SSE 4 |
| kJ | 17 | 16 | 90 | 27 | 57 | 14 | 17 | 13 | 10 | 17 | 20 | 4 | — | 4 | — | — | — | — | 2 | 12 | 17 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 298 | 298 | 120 | 126 | 138 | 125 | 125 | 125 | 303 | 133 | 133 | 189 | 213 | 306 | 254 | 298 | 298 | 298 | 133 | 107 | 27 |
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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