
Surf Forecasts:
Porth Ceriad surf forecast from 4 Aug 2026:
- Most powerful swell: Saturday 8 Aug, 7PM (local time) - 4.5ft (1.4m), 6s period, SW swell with 120 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 1.4m 6s and forecast to arrive on Saturday (Aug 08) at 7PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 5s period and expected on Thursday (Aug 06) at 1AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 7PM (Sat 8th Aug) | 4.5ft (1.4m) 6s |
Table - best surf conditions forecast for Porth Ceriad over the next 16 days.
The Lowdown
Alright, Rusty here. Let's have a look at what's on the table for Porth Ceriad.
To be straight with you, the next 16 days are looking pretty grim for the paddle. The surf just isn't lining up with the wind, and most of the time the conditions are flat-out poor. We're talking about a long stretch of weak, short-period windswell with cross-onshore or onshore winds ruining any chance of a decent wave. The combined swell energy barely ever gets into the moderate range, mostly staying in the weak 2-123 range, which tells you everything you need to know. There's a massive gap in quality here, with day after day of no recommendations.
The only flicker of something that might be worth a look comes right at the very end of the forecast. On Tuesday, August 18th, the morning shows a spike in swell height to 1.6m (5 ft) from the SW with a period of 6 seconds. The combined energy jumps to 155, which is the highest we see. But here's the kicker – the wind is screaming from the WSW at 45 km/h (28 mph), a strong breeze that's cross-onshore and making a mess of things. The wave comment is "poor surf conditions" and the score is a zero. It's not a standout session for a surfer, that's for sure. With that much wind and a short period, it's going to be choppy and hard to manage. Honestly, that setup looks more interesting for kite surfing than paddle surfing.
The rest of the window is a write-off. Tiny swell, bad wind. If you're desperate, Thursday morning, August 6th, you might find a clean 0.8m (3 ft) wave with a cross-offshore NW breeze, but it's weak and poor quality. Sunday morning, August 16th, also shows clean conditions with a cross-offshore breeze, but again the swell is small and the energy is low.
We don't have water temperature data for this spot, but don't expect any warm surprises.
It's a tough outlook, but that's how it goes sometimes. This area tends to have runs like this. Better days will come.
Rusty.
Short Range ForecastLight rain (total 5mm), mostly falling on Mon night. Very mild (max 19°C on Tue morning, min 13°C on Wed night). Winds increasing (light winds from the ESE on Mon night, fresh winds from the W by Wed morning). | Days 4-6 Weather SummaryMostly dry. Very mild (max 18°C on Sun afternoon, min 14°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | |||||||||||||||
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 6 | W 5 | SW 7 | W 13 | WSW 6 | WSW 6 | SW 5 | W 5 | WSW 5 | WSW 5 | SW 4 | SW 5 | SW 5 | SW 6 | SW 7 | SW 7 | SW 5 | SW 6 | W 7 |
Wave Graph | |||||||||||||||||||||
80 | 82 | 79 | 104 | 91 | 3 | 46 | 22 | 20 | 11 | 9 | 40 | 21 | 87 | 67 | 31 | 22 | 11 | 6 | 5 | 1 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | cross | cross | cross-on | cross-off | cross-off | cross-on | on | cross-on | cross-on | cross-on | on | cross-on | on | on | cross | glassy | off | cross-off | cross-off |
High Tide | 12:34PM3.84m | 00:54AM4.07m | 1:20PM3.66m | 1:44AM3.80m | 2:15PM3.45m | 2:46AM3.52m | 3:25PM3.28m | 4:04AM3.34m | 4:47PM3.30m | 5:27AM3.38m | 6:03PM3.53m | 6:38AM3.60m | 7:06PM3.90m | ||||||||
Low Tide | 7:20AM0.69m | 7:17PM0.91m | 7:56AM0.87m | 7:54PM1.08m | 8:41AM1.07m | 8:50PM1.25m | 9:48AM1.25m | 10:25PM1.35m | 11:26AM1.31m | 00:15AM1.24m | 12:58PM1.15m | 1:37AM0.91m | 2:04PM0.85m | 2:37AM0.52m | |||||||
5:39 | — | — | 5:41 | — | — | 5:43 | — | — | 5:45 | — | — | 5:47 | — | — | 5:48 | — | — | 5:50 | — | — | |
— | — | 9:06 | — | — | 9:04 | — | — | 9:02 | — | — | 9:00 | — | 8:59 | — | — | 8:57 | — | — | 8:54 | — | |
mm | 2 | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 19 | 18 | 17 | 16 | 17 | 16 | 14 | 15 | 16 | 15 | 16 | 16 | 16 | 17 | 16 | 17 | 18 | 18 | 18 | 18 | 18 |
Feels °C | 16 | 14 | 13 | 10 | 11 | 10 | 10 | 13 | 13 | 12 | 12 | 14 | 13 | 14 | 14 | 17 | 18 | 18 | 16 | 15 | 15 |
Swell 1 Height (m) Direction Period (s) | SW 7 | — | — | — | NW 5 | W 13 | WSW 6 | NW 5 | SW 5 | SW 12 | NW 4 | W 12 | W 11 | — | — | SW 6 | SW 7 | SW 7 | SW 5 | SW 6 | SW 6 |
43 | — | — | — | 21 | 3 | 46 | 22 | 20 | 6 | 2 | 3 | 2 | — | — | 31 | 22 | 11 | 6 | 5 | 1 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | W 13 | WSW 6 | NNW 4 | — | W 12 | — | — | — | — | — | NW 4 | — | — | — | — |
— | — | — | — | — | — | 3 | 20 | 2 | — | 3 | — | — | — | — | — | 4 | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | W 12 | SW 12 | — | — | — | — | — | — | — | — | W 12 | — | — | W 7 |
— | — | — | — | — | — | — | 3 | 6 | — | — | — | — | — | — | — | — | 3 | — | — | 1 | |
Wind waves Height (m) Direction Period (s) | SW 6 | SW 6 | SW 6 | W 5 | SW 7 | W 5 | NW 6 | — | — | W 5 | WSW 5 | WSW 5 | SW 4 | SW 5 | SW 5 | NW 3 | — | — | NW 4 | NW 4 | — |
80 | 82 | 79 | 104 | 91 | 100 | 54 | — | — | 11 | 9 | 40 | 21 | 87 | 67 | 4 | — | — | 11 | 5 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 314 | 303 | 143 | 437 | 460 | 494 | 317 | 3 | 306 | 317 | 316 | 303 | 303 | 306 | 133 | 125 | 289 | 289 | 289 | 335 | 298 |
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.











