Surf Forecasts:
Porth Ceriad surf forecast from 4 Jul 2026:
- Most powerful swell: Sunday 5 Jul, 4AM (local time) - 3ft (0.9m), 6s period, WSW swell with 59 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 0.9m 6s and forecast to arrive on Sunday (Jul 05) at 4AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 5s period and expected on Saturday (Jul 11) at 7PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 4AM (Sun 5th Jul) | 3ft (0.9m) 6s |
Table - best surf conditions forecast for Porth Ceriad over the next 16 days.
Updates in hr min s Forecast update imminent
Alright folks, Rusty here. Let’s be real: the next couple of weeks are looking pretty flat and quiet. If you’re wanting to surf, you’ll need to be patient.
The only spot with any real forecast is Porth Ceriad. That’s where the swell window is, and it’s a beginner-friendly break that likes a south-west swell. But right now, the ocean is having a snooze.
Starting Saturday, July 4th, the surf is poor. Water temp is a warm 64°F, which is much warmer than normal for the time of year—about 5°F above average, very unusual—but it won’t help the waves. Saturday has a weak, choppy 3ft swell from the WSW with a short period of 6 seconds, and a cross-on wind from the WSW at 15 mph, ramping up to a fresh 22 mph in the afternoon. The combined energy is weak, and conditions are lumpy. Don’t bother.
Sunday the 5th and Monday the 6th get even smaller: 2ft down to 1ft, with cross or cross-on winds and energy dropping into single digits. It’s a write-off. By Wednesday and Thursday, it’s nearly flat—0.3ft waves if you’re lucky, with glassy or offshore winds but no swell. Energy is basically zero.
This pattern of tiny, weak swells and clean but empty conditions continues right through to Friday, July 17th. There’s a tiny glimmer on Saturday the 18th, where we finally see a 3ft swell from the SW with a 6-second period. Winds are light and cross-off from the NW at 6 mph, and combined energy hits 77. It’s described as “surfable waves but very ordinary.” For a beginner at Porth Ceriad, that might be enough for a fun session, but it’s not a standout. The swell is small and the period is short.
After that, Sunday the 19th drops back to tiny 1ft to 1ft with offshore winds but no energy. Overall, we’re looking at about two solid weeks of mostly no surf. That’s normal for this area when the swell windows go quiet. Forecasts can change, but for now, we’re on the beach.
Stay tuned, Rusty.
Short Range ForecastMostly dry. Warm (max 21°C on Sat afternoon, min 15°C on Sun night). Winds decreasing (fresh winds from the SW on Sat afternoon, calm by Mon night). | Days 4-6 Weather SummaryMostly dry. Warm (max 24°C on Thu afternoon, min 16°C on Tue morning). Wind will be generally light. | ||||||||||||||||||||
Saturday 4 | Sunday 5 | Monday 6 | Tuesday 7 | Wednesday 8 | Thursday 9 | Friday 10 | |||||||||||||||
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) | WSW 6 | SW 5 | WSW 5 | WSW 6 | SW 5 | WSW 4 | SW 5 | SW 5 | SW 4 | SW 4 | NW 4 | SW 4 | WSW 4 | SW 4 | SW 4 | — | W 5 | W 12 | W 10 | W 8 | W 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 40 | 43 | 46 | 35 | 13 | 12 | 6 | 6 | 21 | 4 | 3 | 4 | 1 | 1 | 1 | 0 | 1 | 3 | 2 | 1 | 1 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross | cross | cross-on | cross-on | cross-on | on | on | cross-on | on | on | on | glassy | glassy | off | cross-off | cross-off | glassy | off | off |
High Tide | 11:38AM3.67m | 11:57PM4.06m | 12:18PM3.60m | 00:38AM3.97m | 1:02PM3.51m | 1:23AM3.85m | 1:52PM3.41m | 2:16AM3.70m | 2:52PM3.32m | 3:19AM3.57m | 4:02PM3.32m | 4:32AM3.54m | 5:13PM3.44m | ||||||||
Low Tide | 6:43PM0.85m | 7:20AM0.77m | 7:19PM0.97m | 7:58AM0.85m | 7:56PM1.09m | 8:39AM0.94m | 8:39PM1.19m | 9:26AM1.02m | 9:32PM1.27m | 10:24AM1.08m | 10:44PM1.28m | 11:38AM1.08m | 00:14AM1.18m | ||||||||
 |  |  | | |  | | | | | | | | | | | | | | | | |
 | 4:58 | — | — | 5:00 | — | — | 5:01 | — | — | 5:01 | — | — | 5:03 | — | — | 5:03 | — | — | 5:05 | — | — |
 | — | — | 9:44 | — | — | 9:44 | — | — | 9:43 | — | — | 9:42 | — | — | 9:42 | — | — | 9:40 | — | — | 9:39 |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 18 | 21 | 20 | 17 | 20 | 20 | 16 | 17 | 17 | 17 | 18 | 17 | 19 | 21 | 22 | 23 | 24 | 23 | 18 | 19 | 17 |
Feels °C | 13 | 17 | 18 | 15 | 18 | 18 | 15 | 15 | 16 | 15 | 17 | 16 | 19 | 20 | 21 | 22 | 22 | 22 | 19 | 16 | 13 |
Swell 1 Height (m) Direction Period (s) | NW 4 | — | W 10 | — | NW 4 | W 9 | SW 5 | — | W 10 | SW 4 | NW 4 | SW 4 | WSW 4 | SW 4 | SW 4 | — | W 5 | N 3 | W 10 | W 8 | W 8 |
| kJ | 3 | — | 2 | — | 1 | 2 | 6 | — | 2 | 4 | 3 | 4 | 1 | 1 | 1 | — | 1 | 1 | 2 | 1 | 1 |
Swell 2 Height (m) Direction Period (s) | W 11 | — | W 10 | NW 4 | W 9 | — | NW 4 | — | — | NW 4 | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 2 | — | 2 | 2 | 2 | — | 2 | — | — | 3 | — | — | — | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | W 9 | — | — | — | — | — | — | — | W 12 | — | — | — | — | — | W 12 | — | — | — |
| kJ | — | — | — | 2 | — | — | — | — | — | — | — | 3 | — | — | — | — | — | 3 | — | — | — |
Wind waves Height (m) Direction Period (s) | WSW 6 | SW 5 | WSW 5 | WSW 6 | SW 5 | WSW 4 | — | SW 5 | SW 4 | — | SW 4 | — | — | — | — | — | NW 3 | — | — | NNW 2 | N 3 |
| kJ | 40 | 43 | 46 | 35 | 13 | 12 | — | 6 | 21 | — | 3 | — | — | — | — | — | 2 | — | — | 1 | 5 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 494 | 404 | 138 | 138 | 252 | 296 | 293 | 296 | 248 | 270 | 304 | 213 | 199 | 248 | 199 | 199 | 301 | 303 | 271 | 306 | 295 |
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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