Surf Forecasts:
Porth Ceriad surf forecast from 26 Jul 2026:
- Best quality surf: Thursday 30 Jul, 4AM (local time) - 3.5ft (1.1m), 5s period, SW swell with cross-offshore winds.
- Most powerful swell: Thursday 30 Jul, 7PM (local time) - 4.5ft (1.4m), 6s period, SW swell with 114 kJ wave energy.
- Next surfable swell (1★+): Thursday 30 Jul, 4AM (local time) - 3.5ft (1.1m), 5s 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 Thursday (Jul 30) at 4AM. The primary swell is predicted to be 1.1m and 5s period. 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 1.4m 6s and forecast to arrive on Thursday (Jul 30) at 7PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 5s period and expected on Sunday (Jul 26) at 10PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4AM (Thu 30th Jul) | 3.5ft (1.1m) 5s |
| Best Surf | 4AM (Thu 30th Jul) | 3.5ft (1.1m) 5s |
| Most Powerful | 7PM (Thu 30th Jul) | 4.5ft (1.4m) 6s |
Table - best surf conditions forecast for Porth Ceriad over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s get straight into what’s happening close to home. We’re looking at a pretty quiet spell for a while, so patience is the name of the game.
The first bit of the week is a write-off, I’m afraid. The forecast shows nothing but a whole lot of flatness and poor conditions. For the first few days, there’s just no surf on offer worth paddling out for. You’re looking at a gap of about a week where the best advice is to wax your board and wait.
Things start to look a little more interesting around Wednesday the 5th of August. Porth Ceriad finally gets a bit of life. Early that morning we’ve got a 3 ft swell coming from the WSW, with a period of 8 seconds. The wind will be offshore from the north, blowing at 9 mph, which will keep the surface clean. The combined energy is moderate at 150 – a welcome sign after the drought. It’s surfable, but it’s nothing to write home about; just ordinary conditions that will get you wet.
The standout window, and the only one I’d really circle on the calendar, hits on Saturday the 8th of August. For the morning, Porth Ceriad is looking glassy – a dead calm wind from the ENE at 0 mph. The swell picks up to 4 ft from the southwest, and the period lengthens to 9 seconds, making it a proper groundswell setup. The combined energy is strong at 183. This is a classic early morning session for the experienced crew. The water temperature is a notable 65°F, which is over 5 degrees warmer than average for this time of year – very unusual, so you might not need the thickest wetsuit.
The afternoon session on the 8th holds up too, with the same 4 ft SW swell, but the period jumps to a very long 10 seconds, and the energy kicks up to 250. The wind will be a cross-off from the NW at 12 mph, keeping it clean. This is the best of the lot. The long period means the waves will have plenty of shape and punch, but at a beach break, it might be a little too straight. It’s a spot for the more experienced surfer given the size and power.
After that, the energy drops off again. The Sunday and Monday after the 8th look poor, with smaller swells and onshore winds. So, really, you’ve got that one day, the 8th of August, to make the most of it. The rest of the window is a waiting game. It’s a classic mid-summer lull, but it never stays flat forever.
Rusty.
Short Range ForecastSome drizzle, heaviest during Mon morning. Very mild (max 18°C on Mon afternoon, min 14°C on Sun night). Winds decreasing (fresh winds from the WNW on Sun morning, light winds from the SE by Tue night). | Days 4-6 Weather SummaryMostly dry. Warm (max 20°C on Wed morning, min 13°C on Thu night). Winds increasing (light winds from the SSE on Wed morning, fresh winds from the SW by Thu afternoon). | ||||||||||||||||||||
Sunday 26 | Monday 27 | Tuesday 28 | Wednesday 29 | Thursday 30 | Friday 31 | Saturday 1 | |||||||||||||||
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 | SW 6 | WNW 5 | WSW 4 | SW 4 | SW 6 | SW 5 | SW 5 | SW 4 | WSW 4 | WSW 4 | WSW 5 | SW 5 | SW 5 | SW 6 | WSW 6 | SW 6 | WSW 5 | SW 5 | SW 5 | WSW 4 |
Wave Graph  | |||||||||||||||||||||
 kJ | 0 | 40 | 0 | 25 | 29 | 43 | 56 | 28 | 9 | 2 | 2 | 39 | 19 | 35 | 47 | 23 | 8 | 19 | 14 | 7 | 2 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-on | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross-on | cross-on | cross | cross-on | cross-off | cross-off | cross-on | cross-off | cross-off | cross | on |
High Tide | 7:22PM3.37m | 7:44AM3.33m | 8:04PM3.61m | 8:23AM3.51m | 8:41PM3.85m | 8:59AM3.68m | 9:16PM4.07m | 9:32AM3.82m | 9:49PM4.25m | 10:06AM3.92m | 10:23PM4.38m | 10:40AM3.99m | 10:57PM4.42m | ||||||||
Low Tide | 2:08PM1.25m | 2:38AM1.09m | 2:51PM1.04m | 3:18AM0.86m | 3:28PM0.83m | 3:55AM0.66m | 4:02PM0.66m | 4:30AM0.51m | 4:35PM0.55m | 5:04AM0.42m | 5:09PM0.50m | 5:38AM0.39m | 5:41PM0.53m | ||||||||
 |  |  |  | |  | | | |  | |  | | | | | | | | | | |
 | 5:26 | — | — | 5:26 | — | — | 5:28 | — | — | 5:30 | — | — | 5:31 | — | — | 5:33 | — | — | 5:35 | — | — |
 | — | — | 9:21 | — | — | 9:20 | — | — | 9:17 | — | — | 9:16 | — | — | 9:15 | — | — | 9:13 | — | — | 9:12 |
mm | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 16 | 17 | 17 | 15 | 18 | 17 | 18 | 18 | 18 | 20 | 19 | 17 | 15 | 17 | 17 | 14 | 16 | 18 | 14 | 15 | 15 |
Feels °C | 10 | 12 | 13 | 11 | 17 | 16 | 15 | 16 | 18 | 20 | 18 | 15 | 14 | 11 | 13 | 12 | 11 | 13 | 13 | 12 | 13 |
Swell 1 Height (m) Direction Period (s) | — | SW 6 | — | NW 5 | NNW 4 | — | — | WSW 5 | SW 4 | WSW 4 | WSW 4 | — | SW 5 | NW 4 | SW 6 | WSW 6 | SW 6 | WSW 5 | SW 5 | SW 5 | WSW 4 |
| kJ | — | 40 | — | 11 | 2 | — | — | 9 | 9 | 2 | 2 | — | 19 | 4 | 47 | 23 | 8 | 19 | 14 | 7 | 2 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | NW 4 | NW 4 | — | — | NW 4 | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 6 | 3 | — | — | 2 | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | W 5 | NW 6 | WNW 5 | WSW 4 | SW 4 | SW 6 | SW 5 | SW 5 | — | — | — | WSW 5 | NW 4 | SW 5 | NW 4 | NW 4 | — | — | NW 4 | — | — |
| kJ | 104 | 67 | 47 | 25 | 29 | 43 | 56 | 28 | — | — | — | 39 | 4 | 35 | 6 | 4 | — | — | 5 | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 638 | 494 | 126 | 303 | 289 | 246 | 263 | 265 | 254 | 213 | 342 | 315 | 252 | 532 | 139 | 138 | 303 | 404 | 133 | 354 | 298 |
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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