
Surf Forecasts:
Porth Ceriad surf forecast from 2 Sep 2026:
- Best quality surf: Saturday 5 Sep, 7AM (local time) - 2.5ft (0.7m), 6s period, SW swell with cross-offshore winds.
- Most powerful swell: Wednesday 9 Sep, 7AM (local time) - 8ft (2.5m), 7s period, W swell with 568 kJ wave energy.
- Next surfable swell (1★+): Saturday 5 Sep, 7AM (local time) - 2.5ft (0.7m), 6s 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 Saturday (Sep 05) at 7AM. The primary swell is predicted to be 0.7m and 6s period with a secondary swell of 0.1m and 14s. 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 2.5m 7s and forecast to arrive on Wednesday (Sep 09) at 7AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 6s period and expected on Wednesday (Sep 09) at 1PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Sat 5th Sep) | 2.5ft (0.7m) 6s |
| Best Surf | 7AM (Sat 5th Sep) | 2.5ft (0.7m) 6s |
| Most Powerful | 7AM (Wed 9th Sep) | 8ft (2.5m) 7s |
Table - best surf conditions forecast for Porth Ceriad over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s get stuck into it. The outlook for Porth Ceriad is a grim one, I’m afraid. We’ve got a solid 16-day window, but the surf gods are not smiling on this spot. The first real chance of a wave doesn’t show up until the middle of the second week, so there’s a long, dry gap to sit through.
The pattern starts with a real dud. Wednesday morning, 2nd September, we’re looking at a sloppy 4ft swell from the SSW, but a strong 25 mph SSE wind is blowing straight onshore. The water is a warm 65°, which is much warmer than normal for this time of year, but that’s small comfort when the surface is a mess. The combined energy is a weak 72, and it’s just poor surf conditions. That afternoon and through the rest of the week, we’re stuck in a cycle of cross-onshore winds and lumpy, choppy mess. The swell bumps up to 5ft on Thursday, but it’s still cross-onshore and ugly. By Friday, the wind shifts cross-shore, but the swell is short-period and junky. The energy is moderate, hitting 149 on Friday morning, but the conditions are just poor.
The first weekend is a complete write-off. Saturday morning, 5th September, the swell drops to 2ft with a light cross-shore breeze, and the wave energy is a pathetic 43. Sunday is even worse, with a tiny 2ft SE windswell and a 3-second period – that’s barely a ripple. The combined energy on Sunday morning is only 23. We’re looking at a total flat spell.
The first week is a dead loss. The second week starts with a bit more size, but the wind is still a problem. Monday, 7th September, sees a 5ft WSW swell, but it’s cross-onshore and lumpy. The energy is moderate at 105. Tuesday the 8th pushes up to 7ft, but it’s a strong cross-shore wind and a short 6-second period. The energy is getting up there, 329, but it’s messy and no good for a paddle. Honestly, with that much wind and onshore chop, this setup looks more interesting for kite surfing than paddle surfing.
The only glimmer of hope comes mid-week, but it’s a tease. Wednesday morning, 9th September, we see a 7ft swell from the WNW with a 7-second period and a clean cross-offshore wind from the WNW at 22 mph. The energy is a strong 410. That’s a big, powerful swell, but it’s over 8ft, so it’s strictly for experts only. The wind is clean, but the waves will be raw and heavy. That afternoon, it drops off into a small cross-onshore mess again.
The rest of the week peters out. Thursday morning, 10th September, has a tiny 1ft swell with a clean offshore wind, but it’s only 1ft. The energy is 8. Not worth paddling out. Friday, the 11th, is a flat, onshore dud. The weekend of the 12th and 13th sees a small bump back to 4-5ft, but it’s onshore or cross-onshore, so it’s choppy and poor.
The only day that gives a shred of hope is Monday, 14th September. The afternoon sees a 3ft SSW swell with a 6-second period and a gentle offshore wind from the NNW. The conditions are clean, and the energy is a weak 55. The report says “surfable waves but very ordinary conditions.” It’s not a standout, it’s just the only moment that isn’t completely terrible. It’s tiny and weak, but it’s clean. That’s the best on offer, and that’s a pretty sad statement.
After that, it’s back to flatness. Tuesday and Wednesday, 15th and 16th September, are tiny and flat, with a glassy 0.7ft on Wednesday afternoon, but no energy to speak of. The rest of the window is a total bust.
So, to wrap it up: the best (and only) chance to get wet is Monday afternoon, 14th September, at Porth Ceriad. The swell is a weak 3ft from the SW, period is 6 seconds, and the wind is a gentle offshore from the NNW. It’s clean, but it’s small and ordinary. The big 7ft WNW swell on Wednesday, 9th September, is too big for most and only for experts. Everything else is a blown-out mess or flat. It’s a tough run, but it rarely stays this poor for long in this area. Forecasts can change.
Rusty.
Short Range ForecastHeavy rain (total 20mm), heaviest during Thu night. Very mild (max 18°C on Wed night, min 14°C on Fri morning). Winds decreasing (strong winds from the SW on Thu afternoon, light winds from the WNW by Fri night). | Days 4-6 Weather SummaryLight rain (total 3mm), mostly falling on Mon afternoon. Warm (max 22°C on Sun afternoon, min 12°C on Mon afternoon). Winds increasing (light winds from the W on Sat morning, near gales from the WSW by Mon night). | ||||||||||||||||||||
Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | |||||||||||||||
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) | SSW 5 | SW 6 | SW 7 | SW 7 | SW 6 | SW 6 | WSW 5 | WSW 5 | SW 8 | WSW 6 | SW 6 | SW 6 | SE 3 | SSW 6 | SW 5 | WSW 5 | SW 6 | WSW 6 | WSW 6 | WSW 6 | W 7 |
Wave Graph | |||||||||||||||||||||
62 | 156 | 314 | 151 | 169 | 144 | 149 | 128 | 15 | 26 | 17 | 9 | 8 | 43 | 83 | 105 | 237 | 263 | 329 | 271 | 427 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross | cross-off | cross | cross-on | cross-on | cross-on | on | on | cross-on | cross | cross | cross | cross | cross-off |
High Tide | 12:07PM4.09m | 00:30AM4.13m | 12:53PM3.82m | 1:20AM3.76m | 1:48PM3.50m | 2:24AM3.37m | 3:01PM3.24m | 3:49AM3.13m | 4:32PM3.23m | 5:21AM3.19m | 5:54PM3.50m | 6:32AM3.46m | 6:56PM3.92m | ||||||||
Low Tide | 6:48PM0.80m | 7:21AM0.92m | 7:31PM1.04m | 8:15AM1.21m | 8:50PM1.27m | 9:45AM1.42m | 10:41PM1.35m | 11:30AM1.41m | 00:19AM1.15m | 12:52PM1.16m | 1:31AM0.77m | 1:53PM0.82m | 2:25AM0.38m | ||||||||
6:28 | — | — | 6:30 | — | — | 6:31 | — | — | 6:33 | — | — | 6:35 | — | — | 6:37 | — | — | 6:39 | — | — | |
— | 8:05 | — | — | 8:02 | — | — | 8:00 | — | — | 7:58 | — | — | 7:55 | — | — | 7:52 | — | — | 7:51 | — | |
mm | 6 | — | — | — | — | 14 | — | — | — | — | — | — | — | — | — | — | 3 | — | — | — | — |
Temp °C | 17 | 17 | 18 | 17 | 17 | 17 | 15 | 17 | 16 | 14 | 14 | 16 | 18 | 22 | 18 | 16 | 16 | 15 | 14 | 15 | 14 |
Feels °C | 13 | 13 | 13 | 14 | 12 | 12 | 7 | 10 | 10 | 13 | 12 | 11 | 12 | 19 | 14 | 8 | 8 | 6 | 5 | 7 | 6 |
Swell 1 Height (m) Direction Period (s) | W 16 | — | — | SW 15 | — | SW 6 | — | NW 5 | SW 8 | WSW 6 | NW 4 | SW 6 | SW 4 | SW 13 | — | — | — | — | — | — | — |
5 | — | — | 8 | — | 144 | — | 12 | 15 | 26 | 3 | 9 | 5 | 6 | — | — | — | — | — | — | — | |
Swell 2 Height (m) Direction Period (s) | W 16 | — | — | — | — | SW 14 | — | — | SW 14 | NW 4 | SW 13 | SW 13 | SW 13 | W 13 | — | — | — | — | — | — | — |
5 | — | — | — | — | 8 | — | — | 8 | 10 | 7 | 7 | 7 | 3 | — | — | — | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | SW 14 | SW 8 | — | W 13 | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | 7 | 2 | — | 3 | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | SSW 5 | SW 6 | SW 7 | SW 7 | SW 6 | — | WSW 5 | WSW 5 | W 5 | — | SW 6 | SSE 2 | SE 3 | SSW 6 | SW 5 | WSW 5 | SW 6 | WSW 6 | WSW 6 | WSW 6 | W 7 |
62 | 156 | 314 | 151 | 169 | — | 149 | 128 | 66 | — | 17 | 1 | 8 | 43 | 83 | 105 | 237 | 263 | 329 | 271 | 427 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 301 | 303 | 262 | 252 | 337 | 141 | 494 | 262 | 126 | 3 | 245 | 125 | 382 | 134 | 153 | 334 | 120 | 571 | 785 | 738 | 262 |
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.










