Surf Forecasts:
Porth Ceriad surf forecast from 5 Sep 2026:
- Best quality surf: Monday 7 Sep, 7AM (local time) - 3ft (0.9m), 7s period, WSW swell with cross-offshore winds.
- Most powerful swell: Monday 7 Sep, 1PM (local time) - 3ft (0.9m), 13s period, SW swell with 257 kJ wave energy.
- Next surfable swell (1★+): Monday 7 Sep, 7AM (local time) - 3ft (0.9m), 7s period with WSW 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 Monday (Sep 07) at 7AM. The primary swell is predicted to be 0.9m and 7s period with a secondary swell of 0.9m and 6s. Another secondary swell of 0.3m and 15s 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 0.9m 13s and forecast to arrive on Monday (Sep 07) 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 1.7m 6s period and expected on Wednesday (Sep 09) at 1AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Mon 7th Sep) | 3ft (0.9m) 7s |
| Best Surf | 7AM (Mon 7th Sep) | 3ft (0.9m) 7s |
| Most Powerful | 1PM (Mon 7th Sep) | 3ft (0.9m) 13s |
Table - best surf conditions forecast for Porth Ceriad over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's have a look at what's on the cards for our stretch of coast.
To be straight with you, the next couple of weeks are looking pretty flat and ordinary for Porth Ceriad. The weather and wind are just not playing ball for any decent paddle surfing. The water is sitting at 64°F with a positive anomaly of 4°F, so it's much warmer than we'd normally expect for this time of year, which is a nice touch for a paddle-out, but it won't save the surf.
The earliest we see any real action is the morning of Tuesday the 17th of September. That's a solid ten-day wait from the start of the forecast. There's a bit of a wait, but that morning might be our best shot. We've got a 5ft swell out of the West, with moderate wave energy (116). The wind is a light cross-offshore from the NE, keeping things clean. It's not huge, but it's surfable, and the conditions are looking tidy. The afternoon of the 17th goes glassy with a 4ft West swell, but it's a little smaller. For a spot that's fairly consistent, this is a long flat spell, but it won't stay poor forever.
So, if you're keen, the standout is the morning of Tuesday the 17th of September. Get on it early, because the rest of the forecast is a write-off.
Rusty.
Short Range ForecastModerate rain (total 10mm), heaviest on Mon night. Warm (max 20°C on Sun afternoon, min 13°C on Mon night). Mainly fresh winds. | Days 5-7 Weather SummaryLight rain (total 4mm), mostly falling on Thu night. Very mild (max 17°C on Wed night, min 13°C on Tue night). Winds decreasing (fresh winds from the WNW on Tue night, light winds from the W by Wed night). | |||||||||||||||||||
Sat 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | ||||||||||||||
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 6 | SW 6 | SW 5 | SW 6 | SW 6 | SW 14 | SW 5 | WSW 6 | WSW 5 | WSW 5 | SW 10 | WSW 6 | WSW 5 | WSW 4 | SW 3 | SW 6 | SW 6 | WSW 4 | W 5 | SW 7 |
Wave Graph  | ||||||||||||||||||||
 kJ | 23 | 7 | 28 | 75 | 96 | 52 | 87 | 123 | 112 | 117 | 4 | 28 | 17 | 12 | 7 | 107 | 147 | 29 | 43 | 43 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | on | on | cross-on | cross | cross-on | cross-on | cross | cross | cross-off | cross-off | cross | cross | cross-on | cross-on | cross-on | cross-off | cross-off | cross-off |
High Tide | 3:49AM3.13m | 4:32PM3.23m | 5:21AM3.19m | 5:54PM3.50m | 6:32AM3.46m | 6:56PM3.92m | 7:27AM3.80m | 7:46PM4.33m | 8:12AM4.10m | 8:30PM4.65m | 8:54AM4.33m | 9:11PM4.83m | ||||||||
Low Tide | 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 | 3:23PM0.27m | 3:51AM-0.09m | 4:02PM0.14m | ||||||||
 |  |  | |  | |  |  | | | | | | | | | | | | | |
 | — | — | 6:35 | — | — | 6:37 | — | — | 6:39 | — | — | 6:39 | — | — | 6:41 | — | — | 6:43 | — | — |
 | 7:58 | — | — | 7:55 | — | — | 7:52 | — | — | 7:51 | — | — | 7:49 | — | — | 7:45 | — | — | 7:44 | — |
mm | — | 1 | — | — | — | — | — | 9 | — | — | — | — | — | — | — | — | 4 | — | — | — |
Temp °C | 14 | 15 | 19 | 20 | 17 | 15 | 16 | 16 | 15 | 16 | 14 | 14 | 16 | 17 | 16 | 16 | 16 | 15 | 16 | 15 |
Feels °C | 11 | 12 | 14 | 15 | 14 | 11 | 10 | 10 | 7 | 9 | 6 | 8 | 13 | 14 | 12 | 11 | 11 | 8 | 11 | 9 |
Swell 1 Height (m) Direction Period (s) | WSW 6 | SW 6 | SW 5 | SW 13 | W 17 | SW 14 | — | WSW 12 | — | — | SW 10 | WSW 6 | NW 5 | NNW 4 | WSW 7 | — | — | SW 7 | SW 8 | SW 7 |
| kJ | 23 | 6 | 28 | 6 | 6 | 52 | — | 79 | — | — | 4 | 28 | 28 | 2 | 5 | — | — | 23 | 16 | 43 |
Swell 2 Height (m) Direction Period (s) | NW 4 | SW 13 | SW 13 | — | W 12 | WSW 10 | — | — | — | — | — | — | W 8 | WSW 7 | NW 4 | — | — | — | — | — |
| kJ | 7 | 7 | 7 | — | 3 | 9 | — | — | — | — | — | — | 1 | 5 | 1 | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | SW 13 | NW 4 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 7 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | SSW 3 | S 3 | SW 6 | SW 6 | WSW 6 | SW 5 | WSW 6 | WSW 5 | WSW 5 | WNW 6 | NW 6 | WSW 5 | WSW 4 | SW 3 | SW 6 | SW 6 | WSW 4 | W 5 | NW 4 |
| kJ | — | 5 | 5 | 75 | 96 | 41 | 87 | 123 | 112 | 117 | 168 | 96 | 17 | 12 | 7 | 107 | 147 | 29 | 43 | 26 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 252 | 132 | 184 | 393 | 191 | 3 | 457 | 262 | 494 | 494 | 291 | 292 | 298 | 125 | 184 | 307 | 354 | 494 | 494 | 126 |
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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