Surf Forecasts:
Porth Ceriad surf forecast from 29 Aug 2026:
- Best quality surf: Wednesday 2 Sep, 1AM (local time) - 3ft (0.9m), 6s period, SW swell with glassy winds.
- Most powerful swell: Saturday 5 Sep, 1AM (local time) - 8ft (2.5m), 8s period, SW swell with 890 kJ wave energy.
- Next surfable swell (1★+): Wednesday 2 Sep, 1AM (local time) - 3ft (0.9m), 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 Wednesday (Sep 02) at 1AM. The primary swell is predicted to be 0.9m and 6s period with a secondary swell of 0.1m and 16s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Porth Ceriad in the next 16 days are 2.5m 8s and forecast to arrive on Saturday (Sep 05) at 1AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.7m 6s period and expected on Monday (Aug 31) at 10AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Wed 2nd Sep) | 3ft (0.9m) 6s |
| Best Surf | 1AM (Wed 2nd Sep) | 3ft (0.9m) 6s |
| Most Powerful | 1AM (Sat 5th Sep) | 8ft (2.5m) 8s |
Table - best surf conditions forecast for Porth Ceriad over the next 16 days.
The Lowdown
Alright, listen up folks, it’s Rusty here. Gotta be straight with you, this 16-day window for the region is looking pretty grim overall. We’ve got a long stretch ahead with the kind of conditions that’ll make you want to stay on the couch. There’s a real gap in the action, from now all the way through to the morning of Saturday the 5th of September, where the surf just isn't on, or it’s blown out and ugly. You won't find a decent wave in that whole run.
The only real light at the end of the tunnel, and I mean the *only* one, shows up way later in the period. We’re looking at Porth Ceriad for the afternoon of Sunday the 6th of September. That afternoon, a south-west groundswell moves in, around 6ft with a 6-second period. The wave energy is moderate, coming in at (265). Now, here’s the thing that makes this the standout: the wind goes light and clean out of the east-northeast, giving us a clean cross-off breeze. That is your golden ticket for this whole outlook. It’s the only time we get a "clean" report with some size that’s not too crazy. Keep in mind, the swell is a touch over 5ft, so it might be a bit much if you’re just starting out.
But look, that’s it. One afternoon. The rest is either flat, onshore slop, or just brutal winds. The water temp? It’s about average for the time of year, nothing wild. For a beginner-friendly spot that's exposed to the SW, it’s a real shame the stars don’t align more. This is one of those times you just have to wait for the next front to roll through. The forecasts can always change, but for now, mark that Sunday afternoon in your calendar and hope it holds.
Rusty.
Short Range ForecastHeavy rain (total 27mm), heaviest during Sat morning. Very mild (max 18°C on Fri night, min 14°C on Sun night). Winds increasing (light winds from the WSW on Sat night, fresh winds from the NW by Mon morning). | Days 4-6 Weather SummaryModerate rain (total 16mm), heaviest on Tue afternoon. Very mild (max 19°C on Wed afternoon, min 15°C on Wed night). Winds increasing (calm on Tue night, strong winds from the SW by Wed afternoon). | ||||||||||||||||||||
Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | |||||||||||||||
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 6 | SW 6 | SW 10 | SW 8 | SW 6 | SW 8 | WSW 9 | WSW 9 | SW 5 | WSW 5 | SW 5 | SW 6 | SW 6 | SW 6 | WSW 7 | WSW 6 | WSW 7 | W 5 | WSW 5 | WSW 5 | SW 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 30 | 18 | 154 | 58 | 148 | 187 | 49 | 129 | 85 | 94 | 65 | 47 | 16 | 228 | 342 | 173 | 193 | 80 | 66 | 37 | 890 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | off | cross | on | on | cross | cross-off | cross-on | cross-on | cross-on | cross-on | glassy | on | on | cross | cross | cross-on | cross | cross-on | cross | cross-off |
High Tide | 9:41AM4.17m | 9:56PM4.61m | 10:14AM4.29m | 10:31PM4.67m | 10:49AM4.33m | 11:07PM4.61m | 11:27AM4.26m | 11:46PM4.43m | 12:07PM4.09m | 00:30AM4.13m | 12:53PM3.82m | 1:20AM3.76m | 1:48PM3.50m | 2:24AM3.37m | |||||||
Low Tide | 4:34AM0.22m | 4:39PM0.34m | 5:06AM0.19m | 5:11PM0.35m | 5:39AM0.26m | 5:43PM0.44m | 6:11AM0.42m | 6:15PM0.60m | 6:44AM0.65m | 6:48PM0.80m | 7:21AM0.92m | 7:31PM1.04m | 8:15AM1.21m | 8:50PM1.27m | |||||||
 |  |  |  |  | |  | |  |  | | | | | |  | |  | | | | |
 | 6:22 | — | — | 6:22 | — | — | 6:24 | — | — | 6:26 | — | — | 6:28 | — | — | 6:30 | — | — | 6:31 | — | — |
 | — | 8:14 | — | — | 8:12 | — | — | 8:09 | — | — | 8:07 | — | — | 8:05 | — | — | 8:02 | — | — | 8:00 | — |
mm | 8 | — | 1 | 5 | 4 | 5 | — | — | — | 2 | 3 | 4 | 1 | 3 | 3 | — | — | 1 | — | — | — |
Temp °C | 16 | 17 | 16 | 17 | 17 | 16 | 14 | 16 | 17 | 16 | 17 | 18 | 17 | 19 | 17 | 16 | 17 | 17 | 16 | 17 | 16 |
Feels °C | 14 | 16 | 14 | 13 | 12 | 12 | 7 | 11 | 13 | 11 | 12 | 15 | 12 | 14 | 12 | 9 | 10 | 11 | 10 | 11 | 8 |
Swell 1 Height (m) Direction Period (s) | SW 6 | SW 6 | SW 10 | SW 8 | — | — | WSW 9 | WSW 9 | NNW 5 | — | — | W 16 | SW 6 | — | — | — | — | — | SW 14 | WSW 5 | — |
| kJ | 30 | 18 | 154 | 58 | — | — | 49 | 129 | 2 | — | — | 5 | 16 | — | — | — | — | — | 8 | 37 | — |
Swell 2 Height (m) Direction Period (s) | — | — | NNW 3 | — | — | — | — | NW 5 | — | — | — | — | — | — | — | — | — | — | SW 14 | NW 4 | — |
| kJ | — | — | 1 | — | — | — | — | 25 | — | — | — | — | — | — | — | — | — | — | 8 | 3 | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | W 16 | — | — | — | — | — | — | SW 14 | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | 5 | — | — | — | — | — | — | 8 | — |
Wind waves Height (m) Direction Period (s) | SE 3 | — | W 3 | SSW 4 | SW 6 | SW 8 | WNW 6 | — | SW 5 | WSW 5 | SW 5 | SW 6 | S 3 | SW 6 | WSW 7 | WSW 6 | WSW 7 | W 5 | WSW 5 | S 3 | SW 8 |
| kJ | 1 | — | 6 | 8 | 148 | 187 | 180 | — | 85 | 94 | 65 | 47 | 5 | 228 | 342 | 173 | 193 | 80 | 66 | 4 | 890 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 189 | 191 | 3 | 180 | 312 | 3 | 254 | 120 | 126 | 252 | 252 | 0 | 246 | 298 | 262 | 982 | 460 | 320 | 252 | 297 | 120 |
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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