
Surf Forecasts:
Porth Ceriad surf forecast from 3 Sep 2026:
- Best quality surf: Saturday 5 Sep, 7AM (local time) - 2.5ft (0.7m), 6s period, SW swell with cross-offshore winds.
- Most powerful swell: Tuesday 8 Sep, 4AM (local time) - 7ft (2.1m), 7s period, WSW swell with 456 kJ wave energy.
- Next surfable swell (1★+): Saturday 5 Sep, 7AM (local time) - 2.5ft (0.7m), 6s period with SW swell.
Best Forecast Surf Conditions for Porth Ceriad this week:
The surf forecast for Porth Ceriad over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Sep 05) at 7AM. The primary swell is predicted to be 0.7m and 6s period with a secondary swell of 0.6m and 5s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Porth Ceriad in the next 16 days are 2.1m 7s and forecast to arrive on Tuesday (Sep 08) at 4AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 5s period and expected on Tuesday (Sep 08) at 10PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Sat 5th Sep) | 2.5ft (0.7m) 6s |
| Best Surf | 7AM (Sat 5th Sep) | 2.5ft (0.7m) 6s |
| Most Powerful | 4AM (Tue 8th Sep) | 7ft (2.1m) 7s |
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.
Honestly, mate, the next 16 days are a tough stretch. We're looking at a long, dry spell with hardly any surf worth paddling out for. The first real chance you'll get is a tiny window over a week and a half away, but it's a gamble. The whole period is mostly a write-off, with a big gap of nothing happening for days on end.
The water is running much warmer than usual for this time of year, sitting at 64° on Thursday morning. That's a proper anomaly.
Let's break it down. Thursday the 3rd and Friday the 4th have some size, with swell around 5 ft to 5 ft coming from the SW and WSW, but the wind is a mess. We're talking strong cross-onshore and cross-shore winds blowing 19-25 mph, making it lumpy and messy. Not worth a look.
We drop right off into a flat spell from the 5th through to the 7th. Tiny waves, poor surf, and even when the wind goes light, there's just no energy.
There's a flicker on the 8th of September, Tuesday morning. The swell picks up to 6 ft from the W, and we get a clean, cross-off wind from the WNW at 22 mph. The combined energy is moderate (232). But it's still rated as poor surf, and the period is a short 6 seconds, so it's going to be a bit of a close-out mess. Not a standout.
Then we go into another flat spell all the way through to the 10th of September, Thursday afternoon. Finally, something worth mentioning. The wind goes glassy, and we get a 4 ft swell from the SW at 7 seconds with a combined energy of 102 (moderate). The waves are surfable, but very ordinary. This is the best of a bad lot, and it's not saying much. It's a beginner-friendly height, but the conditions are just "okay."
From the 11th all the way through to the 18th, it's a flat, almost non-existent swell. Tiny waves, clean winds, but nothing to ride. The long period swells that do show up, like the 19-second groundswell on the 15th, are completely wasted on a 0.3 ft wave height. You'd be floating.
So, the one and only real window to paddle out is Thursday afternoon, the 10th of September, at Porth Ceriad. It's a glassy, beginner-friendly 4 ft, but don't get your hopes up. It's ordinary surfing. The rest of the month is a bust.
Rusty, signing off.
Short Range ForecastModerate rain (total 10mm), heaviest on Thu night. Very mild (max 18°C on Thu morning, min 14°C on Fri morning). Winds decreasing (strong winds from the W on Fri morning, light winds from the WNW by Fri night). | Days 4-6 Weather SummaryLight rain (total 9mm), mostly falling on Mon night. Warm (max 21°C on Sun afternoon, min 13°C on Mon night). Mainly strong winds. | ||||||||||||||||||||
Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 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) | SW 7 | SW 6 | SW 7 | WSW 5 | WSW 5 | W 5 | SW 6 | SW 6 | SW 4 | SW 5 | SSW 6 | SW 6 | WSW 13 | WSW 12 | WSW 7 | W 6 | WSW 6 | SW 7 | SW 7 | W 4 | SW 4 |
Wave Graph | |||||||||||||||||||||
193 | 163 | 178 | 133 | 133 | 100 | 39 | 17 | 7 | 23 | 70 | 77 | 34 | 251 | 342 | 232 | 126 | 43 | 11 | 16 | 39 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross | cross | cross | cross-off | cross-on | cross-on | cross-on | on | on | cross-on | cross | cross-on | cross | cross-off | cross | cross-off | cross-off | cross-off | cross-on |
High Tide | 12:53PM3.82m | 1:20AM3.76m | 1:48PM3.50m | 2:24AM3.37m | 3:01PM3.24m | 3:49AM3.13m | 4:32PM3.23m | 5:21AM3.19m | 5:54PM3.50m | 6:32AM3.46m | 6:56PM3.92m | 7:27AM3.80m | 7:46PM4.33m | ||||||||
Low Tide | 7:31PM1.04m | 8:15AM1.21m | 8:50PM1.27m | 9:45AM1.42m | 10:41PM1.35m | 11:30AM1.41m | 00:19AM1.15m | 12:52PM1.16m | 1:31AM0.77m | 1:53PM0.82m | 2:25AM0.38m | 2:41PM0.50m | 3:11AM0.08m | ||||||||
6:30 | — | — | 6:31 | — | — | 6:33 | — | — | 6:35 | — | — | 6:37 | — | — | 6:39 | — | — | 6:39 | — | — | |
— | 8:02 | — | — | 8:00 | — | — | 7:58 | — | — | 7:55 | — | — | 7:52 | — | — | 7:51 | — | — | 7:49 | — | |
mm | — | — | 10 | — | — | — | — | — | — | — | — | — | — | — | 8 | — | 1 | — | — | — | 3 |
Temp °C | 18 | 17 | 17 | 15 | 17 | 16 | 14 | 15 | 15 | 20 | 21 | 17 | 15 | 16 | 16 | 14 | 16 | 14 | 14 | 14 | 15 |
Feels °C | 14 | 12 | 11 | 8 | 10 | 9 | 12 | 12 | 12 | 14 | 17 | 13 | 12 | 11 | 9 | 8 | 10 | 7 | 9 | 11 | 11 |
Swell 1 Height (m) Direction Period (s) | — | — | SW 7 | — | NW 5 | SW 14 | SW 6 | NW 4 | SW 4 | SW 5 | SW 13 | W 12 | WSW 13 | NW 4 | — | — | WSW 6 | SW 7 | SW 7 | NNW 5 | — |
— | — | 178 | — | 16 | 8 | 39 | 3 | 6 | 23 | 6 | 3 | 34 | 7 | — | — | 126 | 43 | 11 | 9 | — | |
Swell 2 Height (m) Direction Period (s) | — | — | SW 14 | — | — | — | NW 5 | SW 13 | WSW 6 | SW 13 | — | — | WSW 10 | WSW 12 | — | — | — | — | SW 6 | — | W 7 |
— | — | 8 | — | — | — | 10 | 7 | 4 | 7 | — | — | 10 | 15 | — | — | — | — | 1 | — | 1 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | SW 14 | W 14 | SW 13 | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | 7 | 4 | 7 | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | SW 7 | SW 6 | — | WSW 5 | WSW 5 | W 5 | — | SW 6 | SSE 2 | SE 3 | SSW 6 | SW 6 | W 5 | WSW 12 | WSW 7 | W 6 | NW 5 | NW 5 | NW 5 | W 4 | SW 4 |
193 | 163 | — | 133 | 133 | 100 | — | 17 | 1 | 5 | 70 | 77 | 55 | 251 | 342 | 232 | 50 | 103 | 49 | 16 | 39 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 252 | 317 | 3 | 253 | 494 | 126 | 3 | 252 | 125 | 184 | 393 | 246 | 3 | 260 | 272 | 262 | 494 | 126 | 306 | 260 | 140 |
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.










