Surf Forecasts:
Porth Ceriad surf forecast from 16 Jul 2026:
- Most powerful swell: Thursday 16 Jul, 10PM (local time) - 0.5ft (0.1m), 12s period, SW swell with 6 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 0.1m 12s and forecast to arrive on Thursday (Jul 16) 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 1.1m 5s period and expected on Saturday (Jul 18) at 4PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 10PM (Thu 16th Jul) | 0.5ft (0.1m) 12s |
Table - best surf conditions forecast for Porth Ceriad over the next 16 days.
The Lowdown
Alright, Rusty here. Let's have a look at what's on the cards for Porth Ceriad. Mate, I gotta be straight with you – this forecast is a tough one to swallow. For the next 16 days, there's barely a whisper of surf worth getting wet for. The first decent swell doesn't even show up until Tuesday the 28th, and even then, it's nothing to write home about. We're looking at over a week of flat, glassy conditions with barely a ripple. The water is a balmy 66°F, which is a whopping 7°F warmer than usual for this time of year – feels more like a summer bath than the Atlantic.
The first sign of life, and I use that term loosely, comes on Tuesday morning, the 28th of July. We'll see a bit of a lift with a SW swell pushing in at about 4ft. The period is a short, weak 5 seconds, so it's going to be pretty fat and gutless. The wave energy is weak, only registering a 83. The wind is offshore from the NNE, which will keep the surface clean, but it's a gentle breeze, not a strong one. It's described as "surfable waves but very ordinary conditions," which is about as honest as you can get. It's a beginner-friendly wave at that size, but the quality is lacking.
The morning of the 28th is the only window that gets a score of 1 out of 10, which is the best we've got. After that, the wind kicks up hard from the north in the afternoon, hitting 22 mph, which will shred any chance of a decent wave. The rest of the week is a write-off, with onshore winds and rain. The 29th and 30th are a mess, with cross-onshore and onshore winds blowing out the small swell.
So, the bottom line: there's one morning, Tuesday the 28th, for a desperate paddle on some clean but weak and mushy 4ft waves. It's not for the kite surfers either, as the swell is too small and weak. Other than that, this is a classic flat spell. It won't stay this way forever, but for now, leave the boards in the shed.
Rusty.
Short Range ForecastMostly dry. Warm (max 22°C on Thu afternoon, min 13°C on Fri night). Winds decreasing (fresh winds from the NNW on Sat morning, calm by Sun morning). | Days 5-7 Weather SummaryMostly dry. Very mild (max 18°C on Sun afternoon, min 13°C on Sun night). Winds increasing (light winds from the N on Mon night, fresh winds from the NNW by Tue night). | |||||||||||||||||||
Thu 16 | Friday 17 | Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | ||||||||||||||
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 14 | W 15 | W 12 | SW 12 | SW 13 | SW 6 | W 11 | SW 11 | W 11 | NNW 3 | N 3 | NNW 3 | NNW 4 | W 8 | NW 5 | NNW 3 | W 16 | NNW 3 | NNW 4 | NW 6 |
Wave Graph  | ||||||||||||||||||||
 kJ | 8 | 6 | 3 | 6 | 6 | 1 | 2 | 5 | 2 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 5 | 0 | 0 | 1 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | off | cross-off | cross-off | off | off | cross-off | cross-off | glassy | cross-off | off | off | cross-off | off | cross-off | off | off | off | cross-off | off |
High Tide | 10:33PM4.82m | 10:58AM4.23m | 11:18PM4.74m | 11:43AM4.06m | 00:03AM4.51m | 12:29PM3.83m | 00:49AM4.19m | 1:15PM3.57m | 1:38AM3.80m | 2:07PM3.31m | 2:32AM3.43m | 3:07PM3.10m | 3:38AM3.13m | |||||||
Low Tide | 5:26PM0.24m | 6:00AM-0.05m | 6:08PM0.31m | 6:44AM0.09m | 6:50PM0.46m | 7:26AM0.32m | 7:30PM0.68m | 8:08AM0.62m | 8:12PM0.93m | 8:49AM0.93m | 8:56PM1.18m | 9:34AM1.21m | 9:49PM1.39m | |||||||
 |  | | | |  | |  | | | |  | | | | | | | | | |
 | — | — | 5:13 | — | — | 5:15 | — | — | 5:16 | — | — | 5:16 | — | — | 5:18 | — | — | 5:20 | — | — |
 | — | 9:34 | — | — | 9:32 | — | — | 9:31 | — | — | 9:30 | — | — | 9:30 | — | — | 9:28 | — | — | 9:27 |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 22 | 22 | 19 | 21 | 19 | 13 | 18 | 18 | 17 | 18 | 17 | 14 | 16 | 17 | 15 | 17 | 16 | 13 | 15 | 15 |
Feels °C | 21 | 19 | 17 | 16 | 14 | 8 | 15 | 15 | 15 | 14 | 13 | 9 | 12 | 14 | 14 | 14 | 13 | 7 | 9 | 11 |
Swell 1 Height (m) Direction Period (s) | SW 7 | SW 7 | SW 6 | SW 6 | SW 6 | SW 6 | S 5 | NNW 5 | NNW 4 | — | — | — | — | — | NW 5 | — | W 16 | — | — | NW 6 |
| kJ | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 13 | 2 | — | — | — | — | — | 6 | — | 5 | — | — | 1 |
Swell 2 Height (m) Direction Period (s) | SW 14 | SW 12 | W 12 | SW 12 | SW 13 | — | W 11 | SW 11 | W 11 | — | — | — | — | W 8 | — | — | — | — | — | — |
| kJ | 8 | 6 | 3 | 6 | 6 | — | 2 | 5 | 2 | — | — | — | — | 1 | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | W 8 | W 15 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 1 | 4 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | N 3 | NNW 3 | NNW 4 | N 4 | NNW 4 | NNW 5 | NE 3 | — | NNW 3 | N 3 | NNW 3 | NNW 4 | N 4 | — | NNW 3 | N 3 | NNW 3 | NNW 4 | NNW 6 |
| kJ | — | 2 | 1 | 19 | 9 | 12 | 52 | 1 | — | 1 | 6 | 9 | 29 | 9 | — | 7 | 6 | 8 | 39 | 40 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 191 | 189 | 186 | 308 | 320 | 377 | 319 | 303 | 319 | 304 | 307 | 316 | 377 | 213 | 254 | 306 | 307 | 1030 | 437 | |
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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