Surf Forecasts:
Porth Ceriad surf forecast from 8 Sep 2026:
- Best quality surf: Wednesday 9 Sep, 4PM (local time) - 2.5ft (0.7m), 5s period, NW swell with cross-offshore winds.
- Most powerful swell: Thursday 10 Sep, 7PM (local time) - 7ft (2.1m), 7s period, SW swell with 416 kJ wave energy.
- Next surfable swell (1★+): Wednesday 9 Sep, 4PM (local time) - 2.5ft (0.7m), 5s period with NW 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 Wednesday (Sep 09) at 4PM. The primary swell is predicted to be 0.7m and 5s period with a secondary swell of 0.4m and 8s. Another secondary swell of 0.3m and 4s is also forecast. 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 Thursday (Sep 10) 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 1.6m 6s period and expected on Wednesday (Sep 09) at 1AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4PM (Wed 9th Sep) | 2.5ft (0.7m) 5s |
| Best Surf | 4PM (Wed 9th Sep) | 2.5ft (0.7m) 5s |
| Most Powerful | 7PM (Thu 10th Sep) | 7ft (2.1m) 7s |
Table - best surf conditions forecast for Porth Ceriad over the next 16 days.
The Lowdown
Alright, let’s get this straight. The next couple of weeks are looking pretty grim for Porth Ceriad. I’ve scanned the whole 16-day window, and honestly, there’s nothing that’s going to get the heart racing. We’ve got a long stretch of small, messy, and wind-blown conditions ahead, with only a few brief moments that are even worth mentioning, and even those are just barely surfable. The ocean is going to be mostly flat and uncooperative.
The whole run starts off with a whimper. Tuesday morning has some tiny 4ft west swell, but it’s being chopped up by a fresh 19 mph WNW cross-offshore breeze. It’s clean, but there’s no push to it, and the period is a weak 5 seconds. That’s just not going to do anything. The rest of the week is more of the same: small, short-period leftovers and a lot of onshore wind. Wednesday afternoon brings a knee-high 2ft wave with a 5-second period, but it’s so weak it’s barely breaking. Thursday sees a bit more size, with 7ft on the afternoon, but it’s coming straight onshore with a strong breeze, making it a complete mess. That’s not surf; that’s a washing machine. Friday and the weekend follow suit, with a mix of lumpy onshores and tiny cross-off slop. There’s a lot of time between Tuesday and, say, the following week with nothing on offer at all. This is a real dry spell.
The only glimmer in this whole period comes on Tuesday the 17th. For one moment, early in the morning, the wind drops to a glassy 3 mph from the SSE. But the swell is basically nothing – 0.3ft of west windswell with a 6-second period. It’s completely flat. You could paddle out and just sit there, enjoying the calm, but there’s nothing to ride. It’s a tease. There’s another tiny window Monday the 23rd with a fresh 22 mph offshore wind and 0.7ft of swell, but again, it’s just not enough to even get your fins wet.
And that’s the story. For a spot that’s as exposed as Porth Ceriad is to a good SW groundswell, this is a painfully empty forecast. The water temp is a touch warmer than normal for this time of year, coming in at 64°, which is nice, but you’ll be doing more floating than surfing. It’s one of those stretches where you’re better off checking the forecast again in a few days, because with this kind of blank run, things can change fast. But as it stands, there’s nothing here. Keep the board in the car, but don’t bother with the wetsuit yet.
Rusty
Short Range ForecastLight rain (total 5mm), mostly falling on Thu afternoon. Very mild (max 17°C on Thu night, min 13°C on Tue night). Winds decreasing (strong winds from the NW on Tue night, light winds from the WNW by Wed afternoon). | Days 4-6 Weather SummaryLight rain (total 3mm), mostly falling on Sat afternoon. Very mild (max 17°C on Sat afternoon, min 13°C on Fri morning). Winds decreasing (strong winds from the SW on Sat morning, light winds from the WSW by Sun afternoon). | ||||||||||||||||||||
Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | |||||||||||||||
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) | W 5 | W 5 | WSW 6 | WSW 8 | NW 5 | SW 4 | SW 5 | SW 7 | WSW 8 | SW 8 | SW 8 | SW 8 | SW 6 | SW 7 | SW 7 | SW 7 | SW 7 | SW 6 | SW 5 | SW 5 | SW 6 |
Wave Graph  | |||||||||||||||||||||
 kJ | 81 | 0 | 31 | 43 | 25 | 10 | 56 | 337 | 208 | 72 | 53 | 51 | 150 | 347 | 135 | 37 | 21 | 32 | 38 | 89 | 111 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | cross-off | on | on | on | cross-off | cross-off | cross-off | cross-on | on | cross-on | cross-on | cross-off | cross-on | on | cross-on | cross-on | cross-on |
High Tide | 6:56PM3.92m | 7:27AM3.80m | 7:46PM4.33m | 8:12AM4.10m | 8:30PM4.65m | 8:54AM4.33m | 9:11PM4.83m | 9:33AM4.45m | 9:50PM4.85m | 10:10AM4.47m | 10:28PM4.72m | 10:46AM4.37m | 11:05PM4.46m | ||||||||
Low Tide | 1:53PM0.82m | 2:25AM0.38m | 2:41PM0.50m | 3:11AM0.08m | 3:23PM0.27m | 3:51AM-0.09m | 4:02PM0.14m | 4:29AM-0.11m | 4:37PM0.12m | 5:03AM0.00m | 5:10PM0.20m | 5:34AM0.22m | 5:41PM0.37m | ||||||||
 | |  | | |  |  | |  | |  | |  | | | | | | | | | |
 | 6:39 | — | — | 6:39 | — | — | 6:41 | — | — | 6:43 | — | — | 6:45 | — | — | 6:47 | — | — | 6:48 | — | — |
 | — | 7:51 | — | — | 7:49 | — | — | 7:45 | — | — | 7:44 | — | — | 7:40 | — | — | 7:38 | — | — | 7:37 | — |
mm | — | — | — | — | — | — | 1 | 3 | 1 | — | — | — | 1 | 2 | — | — | — | — | — | — | — |
Temp °C | 14 | 16 | 15 | 13 | 14 | 15 | 16 | 16 | 17 | 15 | 15 | 15 | 15 | 17 | 17 | 16 | 16 | 16 | 17 | 19 | 19 |
Feels °C | 8 | 9 | 7 | 7 | 12 | 10 | 10 | 10 | 13 | 10 | 11 | 11 | 8 | 12 | 13 | 15 | 16 | 14 | 14 | 16 | 16 |
Swell 1 Height (m) Direction Period (s) | — | — | WSW 6 | WSW 8 | NW 5 | NNW 4 | SW 7 | — | WSW 8 | SW 8 | SW 8 | NW 4 | — | — | SW 7 | SW 7 | SW 7 | — | — | — | W 12 |
| kJ | — | — | 31 | 43 | 25 | 2 | 2 | — | 208 | 72 | 53 | 1 | — | — | 135 | 37 | 21 | — | — | — | 3 |
Swell 2 Height (m) Direction Period (s) | — | — | W 9 | WSW 8 | WSW 8 | — | — | — | — | — | NNW 5 | NNW 4 | — | — | — | NW 4 | NNW 4 | — | W 8 | — | — |
| kJ | — | — | 2 | 6 | 24 | — | — | — | — | — | 14 | 1 | — | — | — | 4 | 2 | — | 1 | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | NNW 4 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | W 5 | W 5 | NW 6 | NW 6 | WSW 4 | SW 4 | SW 5 | SW 7 | — | NW 5 | — | SW 8 | SW 6 | SW 7 | — | — | — | SW 6 | SW 5 | SW 5 | SW 6 |
| kJ | 81 | 106 | 181 | 86 | 3 | 10 | 56 | 337 | — | 35 | — | 51 | 150 | 347 | — | — | — | 32 | 38 | 89 | 111 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 141 | 494 | 494 | 126 | 0 | 140 | 352 | 320 | 3 | 126 | 0 | 125 | 252 | 267 | 262 | 126 | 126 | 229 | 236 | 252 | 184 |
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.
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