Surf Forecasts:
Porth Ceriad surf forecast from 25 Jul 2026:
- Best quality surf: Friday 31 Jul, 7PM (local time) - 6ft (1.8m), 6s period, SW swell with offshore winds.
- Most powerful swell: Friday 31 Jul, 10PM (local time) - 5ft (1.6m), 7s period, SW swell with 277 kJ wave energy.
- Next surfable swell (1★+): Friday 31 Jul, 4PM (local time) - 4ft (1.2m), 5s period with SSW 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 Friday (Jul 31) at 4PM. The primary swell is predicted to be 1.2m and 5s period with a secondary swell of 0.1m and 12s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Porth Ceriad in the next 16 days are 1.6m 7s and forecast to arrive on Friday (Jul 31) at 10PM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 5s period and expected on Monday (Jul 27) at 4AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4PM (Fri 31st Jul) | 4ft (1.2m) 5s |
| Best Surf | 7PM (Fri 31st Jul) | 6ft (1.8m) 6s |
| Most Powerful | 10PM (Fri 31st Jul) | 5ft (1.6m) 7s |
Table - best surf conditions forecast for Porth Ceriad over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s take a look at what’s on the menu for Porth Ceriad over the next couple of weeks.
Honestly, for the first week and a bit, it’s a bit of a flat spell. We’re looking at a long drawn-out period of small, weak surf with poor conditions. From Saturday the 25th right through to the end of the month, the swell is tiny, mostly under 3ft, with a lot of cross-shore or onshore wind messing things up. The combined wave energy is pretty pathetic, often below 50 (weak). There’s not a single standout session in that first week.
We finally see a little pulse on the 31st of July. Friday afternoon brings a 4ft swell from the SSW, and with a moderate offshore wind from the North, it’ll be clean. The energy is still modest (67), but it’s the best we’ve seen. It’s surfable, but very ordinary. The morning of the 1st of August has a 3ft SW swell with a long 9-second period, but the wind is cross-on, so it’s not great. The afternoon cleans up with a cross-off breeze, but the swell drops to 2ft.
Then we go into another flat spell until the 5th of August. That Wednesday morning brings a punchy 8ft swell from the SW, and by the afternoon it’s up to 8ft. The combined energy jumps to 735 in the morning and a whopping 1012 in the afternoon (strong to very strong). The period is a solid 8-9 seconds, so there’s some decent groundswell in there. The catch? The wind is cross-shore, swinging from the West at 12-15 mph, which will put a chop on the face. This is a big, powerful swell, and over 8ft, it’s for experts only. It’s the only real standout in the whole window, but the wind is a letdown. For the rest of the period into the second week, it drops right back off to small and clean but weak.
If you’re a beginner, stay away from the 5th of August – that swell is too big. The best bet for a clean, if small, wave might be the afternoon of the 31st of July. The rest of the time, it’s a waiting game. The water temperature is about average for the time of year here.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Sat afternoon. Very mild (max 17°C on Sat afternoon, min 14°C on Mon morning). Winds increasing (light winds from the SW on Fri night, fresh winds from the WNW by Sun morning). | Days 4-6 Weather SummaryMostly dry. Very mild (max 19°C on Tue afternoon, min 16°C on Wed night). Wind will be generally light. | ||||||||||||||||||||
Saturday 25 | Sunday 26 | Monday 27 | Tuesday 28 | Wednesday 29 | Thursday 30 | Friday 31 | |||||||||||||||
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 4 | WSW 5 | WSW 5 | W 5 | SW 6 | SW 6 | NW 5 | WSW 4 | SW 4 | SW 5 | SW 5 | WSW 4 | WSW 4 | — | WSW 3 | SW 4 | SW 4 | SW 4 | SSW 4 | SSW 5 | SW 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 6 | 40 | 52 | 60 | 39 | 15 | 11 | 10 | 16 | 24 | 11 | 3 | 1 | 0 | 1 | 5 | 5 | 2 | 10 | 64 | 169 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross | cross-off | cross-off | cross-off | cross-on | cross-on | on | on | on | on | on | cross-on | cross-on | off | cross-off | off | cross-off | off | cross-off |
High Tide | 6:03AM3.01m | 6:32PM3.16m | 6:59AM3.15m | 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 | |||||||
Low Tide | 1:12PM1.43m | 1:49AM1.31m | 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 | ||||||||
 |  |  | | |  | |  |  | | | | | |  | | | | | | | |
 | 5:24 | — | — | 5:26 | — | — | 5:26 | — | — | 5:28 | — | — | 5:30 | — | — | 5:31 | — | — | 5:33 | — | — |
 | — | — | 9:22 | — | — | 9:21 | — | — | 9:20 | — | — | 9:17 | — | — | 9:16 | — | — | 9:15 | — | — | 9:13 |
mm | — | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 16 | 17 | 17 | 16 | 17 | 17 | 14 | 17 | 18 | 18 | 19 | 18 | 18 | 18 | 18 | 17 | 18 | 18 | 20 | 23 | 19 |
Feels °C | 12 | 16 | 15 | 10 | 11 | 13 | 11 | 16 | 17 | 17 | 19 | 19 | 18 | 17 | 17 | 15 | 16 | 15 | 18 | 20 | 15 |
Swell 1 Height (m) Direction Period (s) | — | — | — | — | SW 6 | SW 6 | NW 5 | NW 4 | SW 4 | SW 5 | SW 5 | WSW 4 | WSW 4 | — | WSW 3 | WSW 4 | — | SW 4 | — | W 12 | SW 8 |
| kJ | — | — | — | — | 39 | 15 | 11 | 3 | 16 | 11 | 11 | 3 | 1 | — | 1 | 3 | — | 2 | — | 3 | 169 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | NW 5 | — | WSW 6 | WSW 6 | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | 28 | — | 3 | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | W 4 | WSW 5 | WSW 5 | W 5 | NW 5 | NW 5 | WSW 4 | WSW 4 | — | SW 5 | — | — | — | — | — | SW 4 | SW 4 | — | SSW 4 | SSW 5 | NW 4 |
| kJ | 6 | 40 | 52 | 60 | 34 | 22 | 7 | 10 | — | 24 | — | — | — | — | — | 5 | 5 | — | 10 | 64 | 25 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 373 | 373 | 303 | 623 | 494 | 138 | 138 | 267 | 216 | 255 | 248 | 254 | 301 | 303 | 306 | 317 | 317 | 306 | 133 | 0 | 5 |
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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