
Surf Forecasts:
Porth Ceriad surf forecast from 3 Aug 2026:
- Most powerful swell: Wednesday 5 Aug, 1PM (local time) - 6.5ft (2.0m), 7s period, WSW swell with 350 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 2.0m 7s and forecast to arrive on Wednesday (Aug 05) at 1PM. 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 6s period and expected on Thursday (Aug 06) at 7AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 1PM (Wed 5th Aug) | 6.5ft (2.0m) 7s |
Table - best surf conditions forecast for Porth Ceriad over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s get straight into it. We’ve got a quiet stretch ahead for Porth Ceriad, so don’t get your hopes up too high.
The whole 16-day window looks pretty flat and weak. There’s a bump of energy midweek, but it’s messy and blown out. After that, the surf drops away to almost nothing, with a long gap of several days from the 8th of August right through to the 18th where there’s just no real rideable swell to speak of.
Let’s start with the only half-decent window. Wednesday the 5th of August sees the biggest swell of the whole period, pushing 6 ft from the WSW, but the period is short at 6-7 seconds. The combined energy hits 268 to 322 (moderate energy), but don’t get excited – it’s a strong cross-shore wind with messy cross-chop. The water temp is about average for the time of year, nothing unusual. For a beginner-friendly spot like Porth Ceriad, that’s too big and messy. Honestly, if the wind wasn’t so strong, this setup looks more interesting for kite surfing than paddle surfing.
Later in the week, Thursday the 6th of August morning cleans up a bit with a WNW cross-off breeze, but the swell has already dropped to 3 ft and the period is a weak 6 seconds. The energy is only 59. It’s clean, but there’s no push.
From the 7th of August onwards, it’s mostly tiny dribble – ankle to knee high at best, with the occasional light offshore wind on Sunday the 9th of August morning, but that’s 2 ft and 5 seconds. Not worth paddling out for.
The rest of the run is flat. The 12th to the 18th of August shows swell heights at 0.3 ft or flat, with a few clean-offshore wind windows, but the energy is near zero. You’d be chasing ripples.
Bottom line: there’s no standout window here. The best of a bad bunch is probably the cleaner, smaller morning windows on the 6th or 9th of August, but even then, you’re looking at weak, shoaly waves. Don’t expect much.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Mon night. Warm (max 24°C on Mon morning, min 15°C on Tue night). Winds increasing (calm on Mon night, strong winds from the WSW by Tue night). | Days 4-6 Weather SummaryMostly dry. Very mild (max 17°C on Thu night, min 14°C on Wed night). Winds decreasing (strong winds from the W on Wed night, calm by Thu night). | ||||||||||||||||||||
Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | |||||||||||||||
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 9 | SW 8 | SW 8 | SW 7 | SW 7 | SW 6 | WSW 6 | SW 7 | W 6 | SW 6 | SW 6 | SW 5 | SW 5 | SW 5 | SW 12 | WSW 4 | SW 4 | SW 5 | SW 5 | SW 8 | SW 7 |
Wave Graph | |||||||||||||||||||||
30 | 35 | 32 | 75 | 89 | 217 | 268 | 322 | 232 | 56 | 28 | 19 | 7 | 4 | 5 | 13 | 12 | 22 | 13 | 9 | 12 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-off | on | on | cross-on | cross-on | cross | cross-on | cross | cross-off | cross-on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-off | off | off | cross-off |
High Tide | 11:53AM3.96m | 00:11AM4.27m | 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 | ||||||||
Low Tide | 6:46AM0.54m | 6:45PM0.75m | 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 | |||||||
5:37 | — | — | 5:39 | — | — | 5:41 | — | — | 5:43 | — | — | 5:45 | — | — | 5:47 | — | — | 5:48 | — | — | |
— | — | 9:07 | — | — | 9:06 | — | — | 9:04 | — | — | 9:02 | — | — | 9:00 | — | 8:59 | — | — | 8:57 | — | |
mm | — | — | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 24 | 20 | 19 | 18 | 18 | 17 | 16 | 17 | 16 | 15 | 15 | 17 | 15 | 17 | 16 | 15 | 17 | 18 | 16 | 17 | 17 |
Feels °C | 21 | 15 | 19 | 16 | 14 | 12 | 9 | 9 | 8 | 12 | 13 | 14 | 13 | 14 | 12 | 10 | 14 | 17 | 14 | 14 | 14 |
Swell 1 Height (m) Direction Period (s) | WSW 9 | SW 8 | SW 8 | SW 7 | — | — | — | — | — | SW 6 | NW 6 | SW 5 | SW 5 | SW 5 | SW 12 | W 11 | — | SW 5 | SW 5 | SW 8 | SW 7 |
30 | 35 | 32 | 75 | — | — | — | — | — | 56 | 31 | 19 | 7 | 4 | 5 | 2 | — | 22 | 13 | 9 | 12 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | W 13 | SW 6 | NNW 5 | NNW 4 | NNW 4 | W 12 | — | — | W 11 | WSW 8 | SW 5 | — |
— | — | — | — | — | — | — | — | — | 3 | 28 | 2 | 1 | 1 | 3 | — | — | 2 | 7 | 4 | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | W 12 | SW 12 | SW 12 | W 12 | — | — | — | — | — | — | W 12 |
— | — | — | — | — | — | — | — | — | — | 3 | 6 | 6 | 3 | — | — | — | — | — | — | 3 | |
Wind waves Height (m) Direction Period (s) | SE 3 | — | — | SSE 3 | SW 7 | SW 6 | WSW 6 | SW 7 | W 6 | NW 6 | — | — | — | — | WSW 4 | WSW 4 | SW 4 | — | — | — | — |
5 | — | — | 6 | 89 | 217 | 268 | 322 | 232 | 79 | — | — | — | — | 2 | 13 | 12 | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 107 | 213 | 134 | 307 | 307 | 307 | 317 | 460 | 532 | 370 | 303 | 316 | 307 | 303 | 320 | 373 | 404 | 189 | 113 | 306 | 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.











