
Surf Forecasts:
Llantwit Major surf forecast from 14 Sep 2026:
- Most powerful swell: Tuesday 15 Sep, 1PM (local time) - 5ft (1.5m), 7s period, W swell with 199 kJ wave energy.
Best Forecast Surf Conditions for Llantwit Major this week:
The most powerful waves expected at Llantwit Major in the next 16 days are 1.5m 7s and forecast to arrive on Tuesday (Sep 15) at 1PM. Winds are predicted to be cross-onshore at the time the swell arrives.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 1PM (Tue 15th Sep) | 5ft (1.5m) 7s |
Table - best surf conditions forecast for Llantwit Major over the next 16 days.
The Lowdown
Right then, let’s have a look at what’s on the cards for Llantwit Major. I’ll be straight with you – the next couple of weeks are looking pretty grim for any proper surf. There’s nothing on the horizon that’s going to get the heart racing, and for the most part, we’re dealing with onshore slop and tiny, weak waves.
The window opens on Monday the 14th, but honestly, it’s not worth getting wet for. We’ve got a weak 2ft of west swell, but it’s coming in with a onshore breeze that’s going to chop it all up. The water is a balmy 66°, which is much warmer than normal for this time of year, but that’s about the only positive. The energy is weak too, with a combined reading of just 79.
Tuesday the 15th sees the swell nudge up a bit to 4ft, and the period drops to a poor 7 seconds. That’s a short-period, wind-driven mess, and with a 30 km/h cross-onshore wind, it’s going to be lumpy and hard work. Not one for the log.
The rest of that first week is much the same story. Wednesday the 16th has a touch more swell energy (184 in the combined reading), but the period is still a short 10 seconds and the wind stays onshore. By Thursday and Friday, the swell drops back down to around 4ft and 3ft, but the wind remains a persistent issue, keeping things choppy and unsettled.
The weekend of the 20th and 21st is where it all starts to fizzle out completely. The wave heights are down around 2ft to 2ft, and while we get a bit of a glassy period on Monday the 21st, there’s just not enough water moving to push anything rideable. The energy has dropped right off to nearly nothing.
There is a stretch from the 22nd through the 27th where the winds turn offshore or go glassy, and the conditions look clean, but the surf is tiny. We’re talking 1ft to 2ft maximum. It’s the kind of stuff that would be good for a beginner to get their first pop-up on a foamie, but for anyone looking for a real wave, it’s a barren wasteland. There’s a little bit of a cross-off breeze on the 22nd and 23rd, but the swell is just too small to make anything of it. The glassy conditions on the 25th are lovely to see, but with 2ft of swell, you’re not surfing anything.
The final few days, the 27th and 28th, see the swell bottom out completely, with waves dropping to 0.7ft or even 0.3ft. The period on the 29th does stretch out to a very long 14 seconds, which is groundswell, but with a wave height of just 1ft, it’s just a ripple on the surface. All that long-period energy will be breaking straight and closing out, if it breaks at all.
So, in short, there is no standout period here. Nothing is worth highlighting as the best on offer because none of it is any good. The swell is too small and weak, and when there is a little bit of size, the wind is onshore and ruining it. The setup looks far more interesting for a kite surfer than a paddle surfer on many of these days, with the onshore winds and choppy conditions. It’s a frustrating outlook, but with the swell being so non-existent, it’s a blank run that is fairly normal for this area. The forecasts can always change, but as it stands, you might want to find something else to do for the next couple of weeks.
That’s all from me. Stay dry.
Rusty
Short Range ForecastLight rain (total 4mm), mostly falling on Mon night. Warm (max 20°C on Mon afternoon, min 13°C on Tue night). Mainly fresh winds. | Days 4-6 Weather SummarySome drizzle, heaviest during Thu morning. Very mild (max 18°C on Sat afternoon, min 12°C on Thu night). Winds decreasing (fresh winds from the W on Thu afternoon, light winds from the W by Fri morning). | ||||||||||||||||||||
Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | |||||||||||||||
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 9 | W 9 | W 6 | W 7 | W 7 | W 7 | W 7 | W 10 | W 10 | W 6 | W 7 | W 7 | W 7 | W 7 | W 6 | W 7 | W 6 | W 7 | W 7 | W 9 | W 7 |
Wave Graph | |||||||||||||||||||||
79 | 99 | 24 | 162 | 199 | 107 | 92 | 102 | 52 | 112 | 131 | 110 | 96 | 73 | 58 | 86 | 100 | 55 | 31 | 73 | 27 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | on | cross-on | cross-on | cross | cross | cross-on | cross-on | cross-on | cross-on | cross | cross-on | cross-on | on | cross-on | cross-on | on | cross-on | cross-on | cross |
High Tide | 9:35PM9.62m | 9:52AM9.26m | 10:09PM9.03m | 10:25AM8.68m | 10:43PM8.32m | 10:59AM8.00m | 11:18PM7.56m | 11:37AM7.28m | 00:01AM6.82m | 12:27PM6.60m | 1:05AM6.19m | 1:52PM6.13m | 2:52AM5.96m | ||||||||
Low Tide | 3:19PM0.47m | 3:36AM0.70m | 3:50PM0.88m | 4:06AM1.21m | 4:22PM1.42m | 4:38AM1.82m | 4:57PM2.07m | 5:15AM2.48m | 5:40PM2.75m | 6:03AM3.13m | 6:41PM3.37m | 7:20AM3.64m | 8:22PM3.70m | ||||||||
6:46 | — | — | 6:47 | — | — | 6:48 | — | — | 6:50 | — | — | 6:52 | — | — | 6:54 | — | — | 6:54 | — | — | |
— | 7:31 | — | — | 7:29 | — | — | 7:27 | — | — | 7:24 | — | — | 7:22 | — | — | 7:20 | — | — | 7:17 | — | |
mm | 1 | — | 2 | — | — | — | — | — | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 19 | 20 | 19 | 16 | 16 | 16 | 15 | 15 | 15 | 16 | 16 | 14 | 16 | 16 | 17 | 17 | 18 | 17 | 18 | 19 | 17 |
Feels °C | 18 | 17 | 17 | 11 | 9 | 13 | 10 | 9 | 11 | 12 | 10 | 10 | 12 | 11 | 14 | 14 | 15 | 16 | 17 | 18 | 17 |
Swell 1 Height (m) Direction Period (s) | W 9 | — | W 6 | — | — | W 7 | W 10 | W 10 | W 6 | — | — | W 7 | W 7 | — | W 6 | — | — | W 7 | W 7 | W 9 | W 7 |
79 | — | 24 | — | — | 107 | 92 | 102 | 29 | — | — | 110 | 96 | — | 58 | — | — | 55 | 31 | 73 | 27 | |
Swell 2 Height (m) Direction Period (s) | — | — | WSW 8 | — | — | — | — | — | W 10 | — | — | — | — | — | W 12 | — | — | W 10 | W 9 | W 15 | W 14 |
— | — | 22 | — | — | — | — | — | 52 | — | — | — | — | — | 3 | — | — | 17 | 27 | 4 | 4 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | W 12 | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | 3 | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | W 9 | — | W 7 | W 7 | — | W 7 | WNW 6 | — | W 6 | W 7 | — | — | W 7 | — | W 7 | W 6 | — | — | — | — |
— | 99 | — | 162 | 199 | — | 92 | 70 | — | 112 | 131 | — | — | 73 | — | 86 | 100 | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 142 | 142 | 142 | 349 | 349 | 88 | 48 | 300 | 300 | 421 | 349 | 88 | 15 | 237 | 142 | 142 | 142 | 108 | 127 | 133 | 51 |
Best forecast wave conditions in Wales - South East | |||||||||||||||||||||
Best forecast wave conditions in United Kingdom | |||||||||||||||||||||
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Information about the Llantwit Major Surf forecast
The above surf forecast table for Llantwit Major provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Llantwit Major can be found by selecting the local surf guide option on the grey menu. Our Llantwit Major 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 (Llantwit Major) 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 Llantwit Major 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.
Llantwit Major is 8 km (5 miles) from the city of Nash Point. If you plan a holiday in Wales - South East, look for hotels and other accommodation in Nash Point. Nash Point has rooms for a wide range of budgets as well as car hire and transport links.










