
Surf Forecasts:
Porth Ceriad surf forecast from 9 Aug 2026:
- Most powerful swell: Sunday 9 Aug, 10PM (local time) - 2.5ft (0.8m), 4s period, WSW swell with 21 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 0.8m 4s and forecast to arrive on Sunday (Aug 09) at 10PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 5s period and expected on Saturday (Aug 15) at 4PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 10PM (Sun 9th Aug) | 2.5ft (0.8m) 4s |
Table - best surf conditions forecast for Porth Ceriad over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s on the cards for Porth Ceriad over the next couple of weeks.
Straight up, I’ll be honest with you – it’s a pretty grim stretch for waves. We’ve got a long, long gap of flatness or tiny, messy junk to sit through. The first real chance of anything rideable doesn’t turn up until the 22nd of August. That’s a solid week and a half of nothing worth paddling for.
From the 9th through the 21st, it’s all poor surf conditions. Heights are mostly between 0.3 ft and 2 ft, with periods that are short and weak. The combined wave energy during this period is very low, often just single digits (like 12, 16, 5) – it’s just not happening. Winds are mostly offshore or cross-off, so the water will look clean, but there’s no swell to push onto that exposed southwest-facing beach. It’s a tease.
Finally, we start to see a pulse building on the 22nd of August (Saturday morning). The swell lifts to about 2 ft from the SW, with period around 6 seconds, and the combined energy jumps to 53. It’s still described as “surfable but very ordinary.” The wind is light and from the ENE, keeping it clean. That afternoon, it gets a bit better: about 3 ft from the SW, with a moderate offshore wind from the NNW, and energy at 49. Clean, but still small.
Then the 23rd of August (Sunday morning) looks like the pick of the whole run. The swell hits about 4 ft from the SW, period at 6 seconds, and energy climbs to 72. That’s the biggest we see. The wind is offshore from the NNW, moderate breeze, so it’ll be clean. The water temp is about average for the time of year, so no worries there. This is a beginner-friendly size, but it’s a short period swell, so it won’t have that grunty groundswell shape. It’s a beach break, so it’ll be a bit sectiony, but a longboard or a funboard will love it.
Sunday afternoon drops back to about 3 ft and the wind goes cross-off, so still okay. After that, we’re back to tiny stuff on the 24th.
So, the one standout here is the morning of the 23rd of August. It’s not epic, but it’s the best we’ve got. If you’re a beginner or just want to get wet on a clean, small wave, that’s your window. The crowds are listed as “often”, so expect some company out there.
Keep your eyes on the forecasts, because this is a long way out. But for now, that’s the story.
Rusty.
Short Range ForecastMostly dry. Warm (max 22°C on Tue morning, min 13°C on Sun night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 27°C on Wed afternoon, min 17°C on Thu night). Winds increasing (calm on Tue night, fresh winds from the NNW by Fri afternoon). | ||||||||||||||||||||
Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | |||||||||||||||
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 6 | SW 6 | SW 4 | SW 5 | SW 6 | SW 6 | SE 3 | SW 6 | W 11 | WSW 10 | WSW 10 | WSW 9 | SW 8 | WSW 9 | WSW 6 | WSW 6 | WSW 5 | SW 7 | SW 7 | SW 7 | SW 8 |
Wave Graph | |||||||||||||||||||||
7 | 10 | 9 | 10 | 5 | 6 | 2 | 2 | 3 | 10 | 9 | 16 | 17 | 9 | 4 | 4 | 3 | 2 | 2 | 2 | 2 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | off | off | cross-off | cross-off | cross-on | cross-off | cross-on | cross-on | cross-off | glassy | cross-off | cross-off | cross-off | off | off | off | off | cross-off | off |
High Tide | 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 | 9:55AM4.39m | 10:13PM4.92m | 10:36AM4.37m | 10:55PM4.81m | |||||||
Low Tide | 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 | 4:55AM-0.16m | 5:03PM0.12m | 5:34AM-0.10m | 5:40PM0.20m | ||||||||
5:48 | — | — | 5:50 | — | — | 5:52 | — | — | 5:52 | — | — | 5:54 | — | — | 5:56 | — | — | 5:58 | — | — | |
— | 8:57 | — | — | 8:54 | — | — | 8:52 | — | — | 8:51 | — | — | 8:49 | — | — | 8:46 | — | — | 8:45 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 17 | 17 | 17 | 15 | 16 | 17 | 22 | 22 | 22 | 24 | 27 | 26 | 24 | 24 | 22 | 18 | 20 | 19 | 19 | 22 | 20 |
Feels °C | 15 | 14 | 14 | 12 | 13 | 14 | 21 | 20 | 21 | 22 | 24 | 24 | 21 | 21 | 20 | 13 | 14 | 15 | 18 | 19 | 17 |
Swell 1 Height (m) Direction Period (s) | SW 6 | SW 12 | SW 4 | NW 4 | SW 6 | SW 6 | SW 6 | SW 6 | SW 6 | WSW 10 | WSW 10 | WSW 9 | SW 8 | WSW 7 | WSW 6 | WSW 6 | WSW 5 | SW 7 | SW 7 | SW 7 | SW 7 |
7 | 6 | 9 | 5 | 5 | 6 | 2 | 2 | 1 | 10 | 9 | 16 | 17 | 5 | 4 | 4 | 3 | 2 | 2 | 2 | 2 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | SW 5 | — | NNW 3 | — | — | W 11 | SW 6 | SW 6 | — | — | WSW 9 | SW 8 | — | SW 8 | — | — | — | SW 8 |
— | — | — | 10 | — | 1 | — | — | 3 | 1 | 1 | — | — | 9 | 2 | — | 2 | — | — | — | 2 | |
Swell 3 Height (m) Direction Period (s) | W 12 | — | — | — | — | — | — | — | W 11 | W 6 | — | — | — | — | SW 9 | — | — | — | — | — | — |
3 | — | — | — | — | — | — | — | 3 | 1 | — | — | — | — | 3 | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | SW 3 | SW 6 | NNW 3 | — | NW 4 | — | SE 3 | — | — | SE 3 | — | — | — | — | N 3 | N 4 | NNW 4 | N 3 | N 5 | NNW 5 | N 4 |
2 | 10 | 3 | — | 3 | — | 1 | — | — | 1 | — | — | — | — | 1 | 10 | 17 | 3 | 25 | 48 | 11 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 352 | 494 | 327 | 303 | 306 | 254 | 321 | 329 | 113 | 107 | 113 | 107 | 125 | 291 | 125 | 138 | 306 | 134 | 248 | 335 | 186 |
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.











