Surf Forecasts:
Porth Ceriad surf forecast from 8 Sep 2026:
- Best quality surf: Sunday 13 Sep, 1PM (local time) - 2.5ft (0.8m), 7s period, SW swell with cross-offshore winds.
- Most powerful swell: Thursday 10 Sep, 7PM (local time) - 7.5ft (2.3m), 7s period, SW swell with 480 kJ wave energy.
- Next surfable swell (1★+): Sunday 13 Sep, 1PM (local time) - 2.5ft (0.8m), 7s 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 Sunday (Sep 13) at 1PM. The primary swell is predicted to be 0.8m and 7s period with a secondary swell of 0.1m and 13s. 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 2.3m 7s and forecast to arrive on Thursday (Sep 10) at 7PM. Winds are predicted to be 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+) | 1PM (Sun 13th Sep) | 2.5ft (0.8m) 7s |
| Best Surf | 1PM (Sun 13th Sep) | 2.5ft (0.8m) 7s |
| Most Powerful | 7PM (Thu 10th Sep) | 7.5ft (2.3m) 7s |
Table - best surf conditions forecast for Porth Ceriad over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's be honest, looking at what's on offer for Porth Ceriad over the next couple of weeks... it's a tough watch. We've got a long, flat spell ahead. There’s really nothing to get excited about for the first week and a half. You’re looking at a gap of about ten days with no surf worthy of a mention.
The first little blip, if you can even call it that, shows up on Thursday the 17th of September. There’ll be a tiny, weak 2ft swell from the SW churning in. The morning windows show a gentle offshore breeze, which would make it look clean, but honestly, the energy is basically nothing, a combined energy of just 6. It's more of a chance to sit on the water than actually ride a wave. It's a beginner-friendly wave at Porth Ceriad when it's tiny, but it's so small it's barely breaking.
After that, it's right back to flatness. We’re talking about wave heights barely registering at 0.3ft for the rest of the run into late September. The water temperature is sitting at about 64°, which is a touch warmer than normal for this time of year. That’s about the only positive. The wind does go glassy on a couple of mornings, like the 18th and 21st of September, which is a beautiful sight for a surfer, but with no water moving, it's just a pretty lake.
So, the long and short of it is: save your energy. This is a blank run that’s pretty normal for this stretch of coast when the Atlantic goes to sleep. Keep an eye on the charts though, it tends not to stay this poor for too long.
Rusty
Short Range ForecastLight rain (total 6mm), mostly falling on Thu afternoon. Very mild (max 17°C on Thu morning, min 13°C on Tue night). Winds increasing (light winds from the SW on Wed afternoon, strong winds from the S by Thu afternoon). | Days 4-6 Weather SummaryLight rain (total 8mm), mostly falling on Sat afternoon. Very mild (max 17°C on Sat night, min 13°C on Fri morning). Winds decreasing (strong winds from the SSW on Sat afternoon, 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 | SW 8 | SW 8 | SW 5 | SW 6 | SW 8 | SW 8 | SW 8 | SW 8 | SW 4 | SW 6 | SW 7 | WSW 7 | SW 7 | SW 6 | SSW 4 | SW 4 | SW 5 |
Wave Graph  | |||||||||||||||||||||
 kJ | 81 | 0 | 30 | 43 | 31 | 15 | 41 | 248 | 248 | 70 | 33 | 31 | 40 | 205 | 233 | 81 | 36 | 13 | 7 | 11 | 17 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross-off | cross-off | cross-on | on | on | on | cross-off | cross-off | cross-off | on | on | cross-on | cross-on | cross | cross | cross-on | 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 | — | — | — | — | — | — | — | 5 | 1 | — | — | — | — | 4 | 4 | — | — | — | — | — | 1 |
Temp °C | 14 | 16 | 15 | 13 | 14 | 15 | 17 | 15 | 17 | 14 | 15 | 15 | 14 | 15 | 17 | 17 | 17 | 17 | 16 | 17 | 18 |
Feels °C | 8 | 8 | 7 | 8 | 11 | 10 | 10 | 7 | 13 | 10 | 12 | 13 | 7 | 8 | 15 | 17 | 16 | 16 | 14 | 14 | 14 |
Swell 1 Height (m) Direction Period (s) | WSW 10 | — | WSW 6 | WSW 8 | NW 5 | SW 8 | WSW 8 | — | — | SW 8 | SW 8 | SW 8 | WSW 8 | — | — | WSW 7 | SW 7 | SW 6 | WSW 6 | — | W 8 |
| kJ | 22 | — | 30 | 43 | 20 | 15 | 6 | — | — | 70 | 33 | 31 | 11 | — | — | 81 | 36 | 13 | 3 | — | 1 |
Swell 2 Height (m) Direction Period (s) | — | — | WSW 9 | — | SW 8 | NNW 4 | — | — | — | — | — | NNW 4 | — | — | — | — | — | NNW 4 | — | — | — |
| kJ | — | — | 8 | — | 31 | 2 | — | — | — | — | — | 1 | — | — | — | — | — | 2 | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | NW 4 | — | — | — | — | — | — | — | — | — | — | W 13 | — | — | — | — |
| kJ | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — | 3 | — | — | — | — |
Wind waves Height (m) Direction Period (s) | W 5 | W 5 | NW 6 | NW 6 | WSW 4 | SW 4 | SW 5 | SW 6 | SW 8 | NW 5 | NW 4 | WSW 2 | SW 4 | SW 6 | SW 7 | NW 4 | NW 4 | — | SSW 4 | SW 4 | SW 5 |
| kJ | 81 | 102 | 161 | 69 | 2 | 12 | 41 | 248 | 248 | 35 | 12 | 1 | 40 | 205 | 233 | 5 | 4 | — | 7 | 11 | 17 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 141 | 1032 | 291 | 135 | 3 | 184 | 363 | 262 | 120 | 126 | 126 | 125 | 184 | 298 | 262 | 3 | 289 | 236 | 132 | 296 | 229 |
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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