
Surf Forecasts:
Porth Ceriad surf forecast from 7 Aug 2026:
- Most powerful swell: Sunday 9 Aug, 7AM (local time) - 2ft (0.6m), 6s period, WSW swell with 28 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 0.6m 6s and forecast to arrive on Sunday (Aug 09) at 7AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Monday (Aug 10) at 10PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 7AM (Sun 9th Aug) | 2ft (0.6m) 6s |
Table - best surf conditions forecast for Porth Ceriad over the next 16 days.
The Lowdown
Alright, folks, it’s Rusty here. Let’s have a look at what’s on the cards for Porth Ceriad.
Honestly, the next 16 days are a bit of a tough watch for Porth Ceriad. The swell is small and inconsistent, and the wind is often messy. We’ve got a long stretch of nearly nothing to start, with only a few fleeting moments that might be worth a paddle. The real standout, if you can call it that, is a window around the 18th and 19th of August, but even that comes with its own issues.
Let's break it down. There’s no surf worth mentioning until the 16th of August. That’s a solid week of flat, choppy, or onshore junk. On the 16th, we see a bump in swell, with the morning offering 3 ft from the WSW, but it’s onshore with light rain – not great. The afternoon gets a bit bigger at 4 ft, still onshore. The combined energy is weak, only 94, so it’s not got any punch.
The next day, the 17th, sees a drop back to 2 ft, but the wind goes clean and cross-off in the afternoon. Still, the energy is a paltry 25, so it’s small and weak.
The one and only time the forecast gets a little interesting is on the 18th and 19th of August. On the 18th, we see a pulse of 5 ft from the SSW in the morning and 4 ft from the WSW in the afternoon. The combined energy jumps to 105 and 116 – that’s moderate, so there’s finally some substance. The wind is light and onshore, which is a shame, but it’s not a washing machine. Still, with that size, it’s pushing into the tricky zone for beginners.
The morning of the 19th is arguably the best on offer. We’ve got a clean 4 ft from the W with a light cross-off breeze from the NW. The period is short at 4 seconds, so it’s windswell, not groundswell, and the combined energy is only 55, so it’s not powerful. But it’s clean, which counts for a lot. The afternoon drops back to 3 ft, still clean. This is the only session where the wave comment is anything other than "poor," described as "surfable waves but very ordinary conditions." That’s the best we’ve got.
After that, the 20th through the 22nd are a write-off with strong winds, massive onshore slop, and a return to tiny, messy surf. The 20th afternoon has a 4 ft swell but it’s cross-on and choppy, and the 21st gets hammered by 28 mph winds, making it a full-on mess.
So, to sum it up for Porth Ceriad: the first week is a total write-off. The highlight is the morning of the 19th of August, with clean 4 ft waves from the west. It’s not going to be a classic, but if you’re desperate for a paddle, that’s the session. The crowd profile says it’s *often* busy, so expect company. For the rest, it’s mostly a case of watching the horizon.
Rusty.
Short Range ForecastMostly dry. Very mild (max 18°C on Sun afternoon, min 14°C on Fri night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 24°C on Tue afternoon, min 16°C on Sun night). Wind will be generally light. | ||||||||||||||||||||
Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | |||||||||||||||
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 | WSW 4 | SW 4 | SW 4 | SW 7 | SW 6 | SW 6 | SW 6 | WSW 6 | SW 6 | WSW 6 | SE 3 | SW 6 | W 12 | WSW 10 | WSW 10 | SW 9 | SW 8 | WSW 8 | SW 8 |
Wave Graph | |||||||||||||||||||||
6 | 4 | 7 | 5 | 3 | 8 | 20 | 10 | 6 | 4 | 6 | 4 | 2 | 2 | 3 | 10 | 9 | 20 | 18 | 26 | 16 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | on | on | cross-on | on | cross-on | glassy | cross-off | cross-off | cross-off | cross-off | cross-on | cross-off | glassy | cross-on | cross-off | on | cross-off | cross-on | on |
High Tide | 3:25PM3.28m | 4:04AM3.34m | 4:47PM3.30m | 5:27AM3.38m | 6:03PM3.53m | 6:38AM3.60m | 7:06PM3.90m | 7:36AM3.87m | 7:59PM4.30m | 8:26AM4.13m | 8:47PM4.64m | 9:12AM4.31m | 9:31PM4.85m | ||||||||
Low Tide | 9:48AM1.25m | 10:25PM1.35m | 11:26AM1.31m | 00:15AM1.24m | 12:58PM1.15m | 1:37AM0.91m | 2:04PM0.85m | 2:37AM0.52m | 2:57PM0.55m | 3:28AM0.17m | 3:43PM0.31m | 4:13AM-0.07m | 4:24PM0.16m | ||||||||
5:45 | — | — | 5:47 | — | — | 5:48 | — | — | 5:50 | — | — | 5:52 | — | — | 5:52 | — | — | 5:54 | — | — | |
— | — | 9:00 | — | 8:59 | — | — | 8:57 | — | — | 8:54 | — | — | 8:52 | — | — | 8:51 | — | — | 8:49 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 16 | 15 | 15 | 16 | 17 | 17 | 17 | 18 | 18 | 18 | 18 | 19 | 23 | 24 | 24 | 23 | 23 | 20 | 19 | 20 | 18 |
Feels °C | 13 | 12 | 12 | 13 | 15 | 16 | 16 | 19 | 17 | 17 | 16 | 16 | 20 | 23 | 22 | 22 | 18 | 18 | 21 | 20 | 18 |
Swell 1 Height (m) Direction Period (s) | — | SW 5 | WSW 4 | SW 4 | SW 4 | SW 7 | SW 6 | SW 6 | SW 6 | WSW 6 | SW 6 | N 3 | SW 6 | SW 6 | SW 6 | WSW 10 | WSW 10 | SW 9 | SW 4 | WSW 8 | SW 8 |
— | 3 | 7 | 3 | 2 | 8 | 20 | 10 | 6 | 4 | 6 | 1 | 2 | 2 | 1 | 10 | 9 | 20 | 4 | 26 | 16 | |
Swell 2 Height (m) Direction Period (s) | SW 12 | — | SW 12 | SW 11 | SW 8 | WSW 7 | — | W 12 | — | SW 4 | SW 4 | WSW 6 | — | — | W 12 | SW 6 | S 5 | WSW 9 | SW 8 | NNW 4 | SW 9 |
6 | — | 5 | 5 | 3 | 5 | — | 3 | — | 1 | 1 | 4 | — | — | 3 | 1 | 1 | 8 | 18 | 1 | 3 | |
Swell 3 Height (m) Direction Period (s) | S 6 | W 12 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
1 | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | SW 4 | WSW 5 | — | SSE 2 | WSW 4 | SW 4 | — | — | — | — | NNW 2 | ENE 2 | SE 3 | — | — | SE 3 | SW 6 | WSW 4 | NNW 3 | — | — |
5 | 4 | — | 1 | 1 | 5 | — | — | — | — | 1 | 1 | 2 | — | — | 1 | 1 | 12 | 1 | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 307 | 303 | 298 | 298 | 298 | 298 | 303 | 303 | 298 | 298 | 305 | 301 | 307 | 339 | 113 | 114 | 297 | 138 | 138 | 252 | 138 |
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.











