Surf Forecasts:
Porth Ceriad surf forecast from 27 Jul 2026:
- Most powerful swell: Friday 31 Jul, 1AM (local time) - 4.5ft (1.4m), 6s period, SW swell with 131 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 1.4m 6s and forecast to arrive on Friday (Jul 31) 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 0.7m 4s period and expected on Friday (Jul 31) at 4AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 1AM (Fri 31st Jul) | 4.5ft (1.4m) 6s |
Table - best surf conditions forecast for Porth Ceriad over the next 16 days.
The Lowdown
Alright, grab a cuppa and listen up. This is a tough one—honestly, a real tough one for the next week or so. We’ve got a long dry spell ahead before things start looking even a little interesting. Let’s get into it.
Right now and for the next several days, it’s flat and frustrating. From July 27th right through until the morning of August 7th, there is no surf worth paddling for. That’s a solid gap of nearly a week and a half with nothing but tiny, crummy waves and poor conditions. The combined wave energy is pitiful, barely registering in the single digits or low double digits—like 33 (weak energy) up to 83 (still weak) at best, but it’s all junky.
The first faint glimmer of hope shows up on the morning of Friday, August 7th at Porth Ceriad. The swell finally pushes above 5 ft, coming in at 5 ft from the SW, with a period of 6 seconds. That’s a short-period windswell, nothing special, but the real story is the wind. We get a cross-offshore breeze from the NNW at 6 mph, which cleans things up nicely. The combined energy hits 186 (moderate), so you’ll feel a bit of push. Still, this is strictly for the brave or the desperate—it’s not going to be world-class. The afternoon picks up a touch more size at 6 ft, but by then the wind picks up to 12 mph, making it lumpier despite still being cross-off. This is for intermediates and above, as anything over 5 ft gets a bit sturdy.
The next day, Saturday, August 8th, the morning settles back a bit to 4 ft from the WSW, light NW cross-off wind at 9 mph, energy dropping back to 183 (moderate). Actually, with the light winds and that clean cross-off flow, the morning on the 8th might be the pick of the entire run—small but fun, and the crowd factor at Porth Ceriad is listed as “often,” so expect company. The swell direction is WSW, which isn’t the optimum SW, but it’s close enough to wrap in nicely.
So if you’re desperate for a paddle, the weekend of August 7th and 8th is your only window. The 7th morning has a bit more grunt but is rougher; the 8th morning is smaller but cleaner. After that, it all fades again into tiny, weak junk through the rest of the 16-day window.
Water temps? No info in the file for the anomaly, so let’s just say it’s about average for the time of year—bring a spring suit and you’ll be fine.
Keep the stoke low for now, lads. Check back in a week.
\- Rusty
Short Range ForecastMostly dry. Very mild (max 18°C on Mon afternoon, min 15°C on Sun night). Mainly fresh winds. | Days 4-6 Weather SummaryMostly dry. Very mild (max 17°C on Wed night, min 13°C on Thu night). Winds decreasing (fresh winds from the NNW on Thu night, calm by Sat afternoon). | ||||||||||||||||||||
Monday 27 | Tuesday 28 | Wednesday 29 | Thursday 30 | Friday 31 | Saturday 1 | Sunday 2 | |||||||||||||||
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) | NW 5 | SW 4 | SW 5 | SW 5 | SW 5 | SW 5 | SW 4 | WSW 4 | WSW 5 | WSW 5 | SW 5 | SW 6 | SW 6 | WSW 6 | SW 4 | SW 5 | SW 5 | W 8 | W 9 | SW 8 | WSW 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 18 | 17 | 31 | 48 | 28 | 17 | 4 | 2 | 39 | 44 | 36 | 131 | 29 | 12 | 9 | 7 | 4 | 1 | 2 | 3 | 6 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | cross-on | on | on | cross-on | cross-on | cross-off | cross-on | cross-off | cross-off | cross | cross-on | cross-off | cross-on | glassy | cross-on | cross-off | glassy |
High Tide | 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 | 11:15AM4.00m | 11:32PM4.39m | |||||||
Low Tide | 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 | 6:12AM0.44m | 6:13PM0.62m | ||||||||
 |  |  | | |  | |  | | | | | | | | | | | | | | |
 | 5:26 | — | — | 5:28 | — | — | 5:30 | — | — | 5:31 | — | — | 5:33 | — | — | 5:35 | — | — | 5:37 | — | — |
 | — | — | 9:20 | — | — | 9:17 | — | — | 9:16 | — | — | 9:15 | — | — | 9:13 | — | — | 9:12 | — | — | 9:09 |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 18 | 18 | 18 | 18 | 18 | 17 | 18 | 17 | 15 | 16 | 17 | 13 | 14 | 16 | 13 | 15 | 15 | 18 | 19 | 20 |
Feels °C | 12 | 16 | 17 | 16 | 16 | 18 | 16 | 17 | 15 | 12 | 12 | 13 | 9 | 12 | 15 | 10 | 14 | 13 | 16 | 15 | 17 |
Swell 1 Height (m) Direction Period (s) | NW 5 | NNW 4 | — | — | — | SW 5 | SW 4 | WSW 4 | — | — | NW 4 | SW 6 | SW 6 | WSW 6 | SW 4 | SW 5 | SW 5 | SW 4 | W 7 | SW 8 | WSW 8 |
| kJ | 18 | 2 | — | — | — | 17 | 4 | 2 | — | — | 4 | 131 | 29 | 12 | 9 | 7 | 4 | 1 | 1 | 3 | 6 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | NW 4 | — | NW 3 | — | W 8 | W 9 | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | 5 | — | 2 | — | 1 | 2 | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | WSW 5 | SW 4 | SW 5 | SW 5 | SW 5 | — | — | — | WSW 5 | WSW 5 | SW 5 | — | NW 4 | — | — | — | NW 3 | — | — | NNW 3 | NNE 3 |
| kJ | 15 | 17 | 31 | 48 | 28 | — | — | — | 39 | 44 | 36 | — | 17 | — | — | — | 2 | — | — | 1 | 3 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 303 | 290 | 229 | 255 | 265 | 254 | 296 | 359 | 143 | 303 | 532 | 25 | 138 | 532 | 314 | 317 | 874 | 298 | 301 | 336 | 199 |
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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