
Surf Forecasts:
Llantwit Major surf forecast from 12 Sep 2026:
- Most powerful swell: Saturday 19 Sep, 10AM (local time) - 5ft (1.6m), 8s period, W swell with 334 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 1.6m 8s and forecast to arrive on Saturday (Sep 19) at 10AM. 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 | 10AM (Sat 19th Sep) | 5ft (1.6m) 8s |
Table - best surf conditions forecast for Llantwit Major over the next 16 days.
The Lowdown
Right then, folks. Rusty here. Let's have a look at what Llantwit Major's got lined up for us over the next couple of weeks. Straight off the bat, I gotta tell you, it ain't looking like a classic stretch. We've got a bit of a wait before anything even worth paddling out for shows up.
The water's sitting at 66°, which is a solid 6° warmer than normal for this time of year. That's a proper anomaly – feels more like a late summer swim than an autumn session. Now, for the surf itself...
We're staring down the barrel of a long, bleak run to start. From Saturday the 12th right through to Tuesday the 22nd of September, it's a write-off. The conditions are just consistently poor. You've got onshore winds, mostly cross-onshore, and the swell is small and weak. The combined energy barely gets into triple digits on a few days, but it's all junk. It's honestly more of a kite-surfing setup than a paddle session with that wind and lumpy sea state.
The only break of any note we've got is Llantwit Major itself, a point break.
There is a flicker of hope, though, right at the end of the run. On Wednesday, the 23rd of September, things finally line up. We've got a light, offshore breeze from the East, which will make the point look clean. Through the morning, we'll see a 4ft swell from the West (combined energy hitting 139), but it's the afternoon where it gets interesting. The swell is expected to bump up to 5ft, still from the West, but the energy jumps to 276 – that's a decent pulse of moderate energy. The wind stays light and offshore. Expect "good surf conditions" as the data says. This is the standout window. The sea surface will be clean, and that's all we want.
After that, it fades out again. Thursday the 24th sees the wind shift, making things ordinary again, and Friday the 25th is back to tiny, glassy but unrideable conditions.
So the take-home from your local bloke: there's a massive gap of ten days with no real options. Don't even look at the ocean until Wednesday the 23rd. That afternoon is your moment. It won't be a classic point day of the year, because the swell is only moderate-sized, but after all that rubbish, getting clean chest-high waves with light wind is a proper treat.
Stay patient. Rusty.
Short Range ForecastLight rain (total 5mm), mostly falling on Sat night. Warm (max 20°C on Mon afternoon, min 16°C on Sat morning). Winds decreasing (fresh winds from the WSW on Sat afternoon, light winds from the SW by Sun night). | Days 4-6 Weather SummaryLight rain (total 3mm), mostly falling on Wed night. Very mild (max 17°C on Tue morning, min 13°C on Tue night). Mainly fresh winds. | ||||||||||||||||||||
Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | |||||||||||||||
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 8 | W 7 | W 8 | W 7 | W 7 | W 10 | W 9 | W 6 | W 6 | W 7 | W 7 | W 8 | W 9 | W 10 | W 6 | W 6 | W 7 | W 6 | W 6 | W 6 | W 6 |
Wave Graph | |||||||||||||||||||||
84 | 161 | 160 | 94 | 62 | 92 | 79 | 40 | 20 | 93 | 135 | 125 | 235 | 71 | 33 | 68 | 128 | 80 | 53 | 48 | 42 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | cross-on | cross-on | on | cross-on | cross-on | on | cross-on | cross-on | cross | cross | cross-on | on | cross | cross-on | cross | cross-on | cross-on | on |
High Tide | 8:24PM10.19m | 8:43AM9.91m | 9:00PM10.03m | 9:18AM9.69m | 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 | ||||||||
Low Tide | 2:16PM0.24m | 2:35AM0.16m | 2:47PM0.25m | 3:06AM0.33m | 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 | ||||||||
6:43 | — | — | 6:43 | — | — | 6:46 | — | — | 6:47 | — | — | 6:48 | — | — | 6:50 | — | — | 6:52 | — | — | |
— | 7:36 | — | — | 7:34 | — | — | 7:31 | — | — | 7:29 | — | — | 7:27 | — | — | 7:24 | — | — | 7:22 | — | |
mm | — | — | 5 | — | — | — | — | — | — | — | — | — | — | — | 2 | 1 | — | — | — | — | 2 |
Temp °C | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 20 | 18 | 17 | 17 | 16 | 15 | 15 | 16 | 16 | 15 | 14 | 17 | 17 | 16 |
Feels °C | 13 | 13 | 15 | 17 | 16 | 18 | 18 | 20 | 17 | 14 | 11 | 12 | 10 | 9 | 11 | 9 | 8 | 9 | 12 | 12 | 10 |
Swell 1 Height (m) Direction Period (s) | — | — | W 8 | W 7 | W 10 | W 10 | W 9 | W 6 | W 6 | W 11 | — | W 8 | W 9 | W 10 | W 6 | W 10 | — | W 6 | W 6 | W 13 | W 6 |
— | — | 160 | 94 | 49 | 92 | 79 | 40 | 20 | 2 | — | 32 | 235 | 71 | 33 | 17 | — | 80 | 53 | 12 | 42 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | WSW 10 | — | — | — | WSW 9 | WSW 8 | — | — | — | — | — | WSW 10 | — | — | W 9 | W 9 | — | W 12 |
— | — | — | 34 | — | — | — | 26 | 13 | — | — | — | — | — | 33 | — | — | 27 | 15 | — | 11 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | W 13 | — | W 12 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 14 | — | 3 | |
Wind waves Height (m) Direction Period (s) | W 8 | W 7 | — | — | W 7 | — | — | — | — | W 7 | W 7 | W 8 | — | WNW 6 | — | W 6 | W 7 | — | — | W 6 | SW 3 |
84 | 161 | — | — | 62 | — | — | — | — | 93 | 135 | 125 | — | 56 | — | 68 | 128 | — | — | 48 | 2 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 349 | 286 | 142 | 58 | 74 | 108 | 142 | 142 | 132 | 48 | 349 | 40 | 133 | 133 | 331 | 395 | 349 | 286 | 355 | 237 | 672 |
Best forecast wave conditions in Wales - South East | |||||||||||||||||||||
Best forecast wave conditions in United Kingdom | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
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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.










