Surf Forecasts:
Porth Ceriad surf forecast from 2 Sep 2026:
- Best quality surf: Monday 7 Sep, 10AM (local time) - 1ft (0.3m), 14s period, WSW swell with cross-offshore winds.
- Most powerful swell: Wednesday 2 Sep, 10PM (local time) - 6ft (1.9m), 7s period, SW swell with 335 kJ wave energy.
- Next surfable swell (1★+): Monday 7 Sep, 10AM (local time) - 1ft (0.3m), 14s 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 10AM. The primary swell is predicted to be 0.3m and 14s period with a secondary swell of 0.7m and 5s. Another secondary swell of 0.6m 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 1.9m 7s and forecast to arrive on Wednesday (Sep 02) at 10PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 5s period and expected on Saturday (Sep 05) at 1AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10AM (Mon 7th Sep) | 1ft (0.3m) 14s |
| Best Surf | 10AM (Mon 7th Sep) | 1ft (0.3m) 14s |
| Most Powerful | 10PM (Wed 2nd Sep) | 6ft (1.9m) 7s |
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 brewing for Porth Ceriad over the next couple of weeks.
Right off the bat, I gotta be straight with you – the first week is a write-off. From Tuesday the 1st right through to the end of Sunday the 6th, every single session is a dud. The wind is a mess – mostly onshore or cross-onshore, and the swell is either tiny, short-period junk or just blown out. The water temp is sitting at 65°, which is a solid 4° warmer than usual for this time of year, so that’s a bonus if you’re just floating around, but for surfing? Nada. Forget about it.
We finally get a glimmer of hope on Monday morning, the 7th. A light offshore breeze from the north, a clean 3ft groundswell (period 14 seconds, that’s long period energy), and the combined energy hits 296 (moderate). This is the standout of the whole forecast. The swell direction is WSW, and the optimum is SW, so it’s a little off-angle, but the offshore wind and that long period should make for some groomed, lined-up waves. It’s a beginner-friendly break, so the size is perfect for learning, and the conditions will be clean. But Monday afternoon the wind swings back onshore, so you’ve got a narrow window. Don’t snooze on it.
After that, it’s back to the doldrums for the rest of the week. Tuesday the 8th brings a near gale, and the following days are just a mix of strong wind, chop, and tiny surf. The 9th and 10th have some clean windows due to cross-offshore winds, but the swell is weak and short-period – not worth paddling out for.
The second week stays quiet. There’s a bit of a bump on Sunday the 13th with a 5ft south swell (period 5 seconds, so it’s weak windswell) and clean conditions in the afternoon, but it’s ordinary. The real mention is Monday the 14th – a 5ft SW groundswell with a period of 9 seconds, giving a combined energy of 343 (moderate). But the wind is cross-shore, so it’s not going to be the clean, peaky stuff we love. It’s surfable, but nothing special.
Overall, the only true standout is that Monday morning, the 7th. Everything else is either blown out or too weak. For a spot that’s usually fairly consistent, this is a rough patch of the calendar. Get out there on the 7th if you can, or just wait for a change in the charts.
Stay salty.
Rusty
Short Range ForecastModerate rain (total 14mm), heaviest on Wed morning. Very mild (max 18°C on Wed night, min 14°C on Fri morning). Mainly strong winds. | Days 4-6 Weather SummaryMostly dry. Warm (max 20°C on Sun afternoon, min 13°C on Fri night). Mainly fresh winds. | ||||||||||||||||||||
Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | |||||||||||||||
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) | SSW 5 | SW 6 | SW 7 | SW 7 | SW 5 | SW 7 | WSW 5 | WSW 5 | SW 14 | SW 5 | SW 6 | SW 6 | SW 4 | SSW 4 | SW 5 | WSW 14 | SW 5 | WSW 5 | WSW 7 | SW 4 | WSW 4 |
Wave Graph  | |||||||||||||||||||||
 kJ | 80 | 172 | 314 | 139 | 133 | 198 | 80 | 91 | 8 | 28 | 16 | 11 | 7 | 13 | 30 | 37 | 91 | 100 | 57 | 15 | 24 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross | cross-off | cross-off | cross-on | on | on | on | on | cross-off | cross-on | cross-on | cross | cross-on | off |
High Tide | 12:07PM4.09m | 00:30AM4.13m | 12:53PM3.82m | 1:20AM3.76m | 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 | ||||||||
Low Tide | 6:44AM0.65m | 6:48PM0.80m | 7:21AM0.92m | 7:31PM1.04m | 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 | |||||||
 |  |  | |  |  | |  |  | | |  | | | | | |  | | |  | |
 | 6:28 | — | — | 6:30 | — | — | 6:31 | — | — | 6:33 | — | — | 6:35 | — | — | 6:37 | — | — | 6:39 | — | — |
 | — | 8:05 | — | — | 8:02 | — | — | 8:00 | — | — | 7:58 | — | — | 7:55 | — | — | 7:52 | — | — | 7:51 | — |
mm | 6 | — | — | — | — | 6 | — | — | — | — | — | — | — | — | — | — | — | 2 | — | — | 1 |
Temp °C | 17 | 17 | 18 | 17 | 17 | 17 | 15 | 17 | 16 | 13 | 14 | 14 | 18 | 20 | 18 | 14 | 16 | 16 | 15 | 15 | 15 |
Feels °C | 11 | 13 | 13 | 13 | 12 | 11 | 8 | 11 | 10 | 10 | 12 | 11 | 13 | 16 | 14 | 12 | 11 | 9 | 12 | 12 | 12 |
Swell 1 Height (m) Direction Period (s) | W 16 | — | — | — | — | SW 14 | SW 15 | — | SW 14 | SW 5 | SW 6 | NW 4 | SW 4 | SW 13 | W 16 | SW 5 | — | WSW 12 | NW 4 | NW 4 | SW 6 |
| kJ | 5 | — | — | — | — | 8 | 8 | — | 8 | 28 | 16 | 1 | 4 | 6 | 5 | 22 | — | 26 | 7 | 3 | 2 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | SW 14 | NW 4 | SW 13 | SW 6 | W 8 | SW 12 | WSW 14 | — | — | WSW 10 | — | WSW 9 |
| kJ | — | — | — | — | — | — | — | — | — | 7 | 7 | 7 | 2 | 1 | 6 | 37 | — | — | 19 | — | 8 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | SW 13 | SW 13 | SW 13 | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | 7 | 7 | 7 | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SSW 5 | SW 6 | SW 7 | SW 7 | SW 5 | SW 7 | WSW 5 | WSW 5 | W 5 | NW 5 | — | SW 6 | SSE 3 | SSW 4 | SW 5 | WSW 4 | SW 5 | WSW 5 | WSW 7 | SW 4 | WSW 4 |
| kJ | 80 | 172 | 314 | 139 | 133 | 198 | 80 | 91 | 100 | 25 | — | 11 | 1 | 13 | 30 | 12 | 91 | 100 | 57 | 15 | 24 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 301 | 303 | 267 | 252 | 448 | 141 | 126 | 473 | 126 | 138 | 273 | 113 | 229 | 134 | 225 | 0 | 299 | 272 | 3 | 189 | 125 |
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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