Surf Forecasts:
Porth Ceriad surf forecast from 4 Sep 2026:
- Most powerful swell: Monday 7 Sep, 7AM (local time) - 3.5ft (1.1m), 15s period, WSW swell with 485 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 1.1m 15s and forecast to arrive on Monday (Sep 07) at 7AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.8m 6s period and expected on Tuesday (Sep 08) at 10PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 7AM (Mon 7th Sep) | 3.5ft (1.1m) 15s |
Table - best surf conditions forecast for Porth Ceriad over the next 16 days.
The Lowdown
Right then, folks, Rusty here. Let's have a look at what's on the table for Porth Ceriad over the next couple of weeks. I'll be straight with you – it's a bit of a tough stretch.
Looking at the overall pattern, we're in for a long, quiet run. The first week or so is pretty much a write-off, with small, messy, and wind-affected swells. There's a brief flicker of hope around the 13th, but it's a short-lived window before the swell drops away again. Essentially, we're looking at a gap of over a week before anything even remotely worth a paddle shows up.
The best bet, and really the only real standout in this 16-day window, is on Sunday the 13th of September. The morning starts clean with a light offshore breeze from the NNE at just 3 mph, and the swell is a small 3 ft from the WSW. Combined energy is a weak 44, so it's nothing to write home about, but the conditions will be clean. It's a beginner-friendly spot anyway, so that 3 ft swell with glassy conditions could be a nice little session. The afternoon stays clean, with a 4 ft SW swell and a light cross-offshore breeze, but again, the energy is low at 84. It's surfable, but you'll be scratching for waves.
Before that, there's nothing. The early days are a mess of cross-shore and onshore winds with poor surf. Monday the 7th does see a weird spike of energy (560) from a long-period 14-second WSW groundswell, but the wind is a cross-shore mess. That long period will make it break a bit straight at a beach break like this, and with the wind, it's a no-go.
After the 13th, the swell goes flat again. Monday the 14th sees a jump in height to 8 ft, but that's accompanied by a choppy cross-onshore wind, making it poor quality. It's a real shame, because that size with decent wind would be fun. From the 15th onwards, it's tiny and clean or small and onshore – nothing to get excited about.
So, there you have it. One clean morning on the 13th is the only real window. It's a tough outlook, but that's the way it goes sometimes. Keep your eyes on the forecasts, because things can change.
Rusty.
Short Range ForecastModerate rain (total 14mm), heaviest on Thu night. Warm (max 21°C on Sun afternoon, min 14°C on Fri night). Winds decreasing (strong winds from the W on Fri morning, light winds from the WSW by Sat morning). | Days 4-6 Weather SummaryLight rain (total 2mm), mostly falling on Sun night. Very mild (max 18°C on Sun night, min 13°C on Mon night). Mainly strong winds. | ||||||||||||||||||||
Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | |||||||||||||||
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 8 | WSW 6 | W 5 | SW 6 | WSW 6 | SW 4 | SW 5 | SW 6 | SW 6 | WSW 14 | WSW 5 | WSW 6 | W 6 | WSW 6 | W 6 | W 5 | WSW 5 | SW 7 | WSW 7 | WSW 8 | W 4 |
Wave Graph  | |||||||||||||||||||||
 kJ | 331 | 148 | 120 | 37 | 23 | 14 | 19 | 69 | 116 | 452 | 83 | 235 | 318 | 223 | 0 | 0 | 48 | 423 | 234 | 158 | 54 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-off | cross | cross-on | on | on | on | cross-on | cross | cross-on | cross | cross | cross | cross-off | cross | cross-on | on | cross | cross-on | cross-off |
High Tide | 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 | 8:12AM4.10m | 8:30PM4.65m | ||||||||
Low Tide | 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 | 3:23PM0.27m | 3:51AM-0.09m | |||||||
 |  |  |  | |  | | |  | | | | | | | | |  | |  |  | |
 | 6:31 | — | — | 6:33 | — | — | 6:35 | — | — | 6:37 | — | — | 6:39 | — | — | 6:39 | — | — | 6:41 | — | — |
 | — | 8:00 | — | — | 7:58 | — | — | 7:55 | — | — | 7:52 | — | — | 7:51 | — | — | 7:49 | — | — | 7:45 | — |
mm | — | — | — | — | — | 1 | — | — | 1 | — | — | 1 | — | — | — | — | — | 6 | — | 2 | — |
Temp °C | 15 | 17 | 16 | 14 | 15 | 15 | 19 | 21 | 18 | 15 | 16 | 16 | 14 | 16 | 15 | 14 | 15 | 16 | 17 | 18 | 16 |
Feels °C | 8 | 10 | 9 | 12 | 12 | 11 | 14 | 17 | 14 | 11 | 10 | 8 | 7 | 10 | 8 | 8 | 10 | 11 | 13 | 14 | 10 |
Swell 1 Height (m) Direction Period (s) | — | NW 5 | SW 14 | NW 5 | NW 4 | WSW 6 | SW 5 | SW 13 | W 17 | WSW 14 | — | WSW 12 | — | — | — | — | NW 5 | — | — | — | SW 6 |
| kJ | — | 16 | 8 | 25 | 7 | 4 | 19 | 6 | 6 | 108 | — | 78 | — | — | — | — | 6 | — | — | — | 5 |
Swell 2 Height (m) Direction Period (s) | — | — | — | SW 14 | SW 13 | SW 13 | SW 13 | — | W 12 | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | 7 | 7 | 7 | 7 | — | 3 | — | — | — | — | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | W 14 | W 13 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | 4 | 4 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | WSW 8 | WSW 6 | W 5 | SW 6 | WSW 6 | SW 4 | SSE 3 | SW 6 | SW 6 | WSW 14 | WSW 5 | WSW 6 | W 6 | WSW 6 | W 6 | W 5 | WSW 5 | SW 7 | WSW 7 | WSW 8 | W 4 |
| kJ | 331 | 148 | 120 | 37 | 23 | 14 | 3 | 69 | 116 | 452 | 83 | 235 | 318 | 223 | 197 | 97 | 48 | 423 | 234 | 158 | 54 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 253 | 460 | 126 | 138 | 247 | 132 | 184 | 295 | 252 | 3 | 272 | 120 | 494 | 494 | 291 | 373 | 318 | 303 | 3 | 494 | 291 |
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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