Surf Forecasts:
Llantwit Major surf forecast from 3 Sep 2026:
- Most powerful swell: Tuesday 8 Sep, 1PM (local time) - 6ft (1.9m), 8s period, W swell with 499 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 1.9m 8s and forecast to arrive on Tuesday (Sep 08) 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 8th Sep) | 6ft (1.9m) 8s |
Table - best surf conditions forecast for Llantwit Major over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s talk about what’s cookin’ for the next couple weeks.
Honestly, it’s a pretty grim outlook. The first real chance of anything decent doesn’t pop up until September 7th, and even then it’s a mixed bag.
On the 7th, we get some proper energy rolling in: a 4ft W swell with a nice long 12-second period. The combined energy is strong at 609. That’s the kind of groundswell that should line up well at a point break like Llantwit Major. But the wind is cross-onshore, moderate to fresh, so it’s going to be lumpy and choppy on top. The water temp is about normal for this time of year.
The 8th bumps up to around 6ft from the W, but the period drops to 9 seconds. The energy is still solid in the 439-482 range. The wind gets stronger, cross-onshore, and there are rain showers. That’s over 5ft, so it’s strictly for the experienced crew, and the wind will make it a messy battle.
Now, the 11th of September shows a little light. Friday afternoon we get a 4ft W swell with an 8-second period and 245 units of energy. The wind shifts to a light cross-off from the NNW, and the water looks clean. This is the only session in the whole 16-day window that’s even rated as “surfable,” and it’s just ordinary. That’s the best we’ve got.
The 15th has a tiny 2ft W swell with a 10-second period in the morning. The wind is glassy, dead calm. The energy is weak at 62. You could take a log out for a cruise, but it’s not going to get the heart pumping.
Everything else is flat or blown out. From the 12th straight through the 18th, we’re looking at swells under 2ft with very low energy, often single digits. The wind is a mess or the swell is just too small to care.
Bottom line: if you gotta get wet, aim for the 11th afternoon at Llantwit Major for a clean, small, ordinary session. The 7th has the size but you’ll be fighting the wind. Otherwise, the surf report is a snoozefest.
- Rusty
Short Range ForecastLight rain (total 2mm), mostly falling on Thu night. Warm (max 20°C on Thu morning, min 13°C on Fri night). Winds decreasing (strong winds from the WSW on Thu night, light winds from the WNW by Sat afternoon). | Days 4-6 Weather SummaryLight rain (total 4mm), mostly falling on Mon night. Warm (max 23°C on Sun morning, min 14°C on Sat night). Winds increasing (calm on Sat night, strong winds from the WSW by Mon afternoon). | ||||||||||||||||||||
Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | |||||||||||||||
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 8 | WSW 7 | W 8 | W 8 | W 7 | W 7 | WSW 10 | W 10 | WSW 9 | WSW 8 | W 9 | W 12 | W 12 | W 8 | W 9 | W 9 | W 9 | W 7 | W 6 | W 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 135 | 164 | 136 | 284 | 282 | 116 | 43 | 31 | 47 | 27 | 24 | 55 | 472 | 390 | 334 | 439 | 482 | 219 | 77 | 36 | 28 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | on | cross-on | cross-on | cross | cross-on | cross | cross | cross | cross-on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross-on | on |
High Tide | 11:20AM8.57m | 11:45PM8.29m | 12:12PM7.90m | 00:45AM7.56m | 1:22PM7.29m | 2:08AM7.04m | 2:54PM7.08m | 3:43AM7.09m | 4:22PM7.49m | 5:00AM7.66m | 5:29PM8.25m | 5:58AM8.41m | 6:21PM9.04m | ||||||||
Low Tide | 4:50AM1.29m | 5:10PM1.54m | 5:36AM1.90m | 6:04PM2.17m | 6:38AM2.55m | 7:22PM2.74m | 8:10AM2.98m | 9:14PM2.89m | 10:04AM2.84m | 10:56PM2.41m | 11:26AM2.22m | 00:02AM1.68m | 12:22PM1.51m | 00:49AM0.99m | |||||||
 | |  |  | |  | | | |  | | | | | | |  |  | | |  | |
 | 6:28 | — | — | 6:30 | — | — | 6:31 | — | — | 6:33 | — | — | 6:35 | — | — | 6:35 | — | — | 6:37 | — | — |
 | — | 7:57 | — | — | 7:53 | — | — | 7:52 | — | — | 7:50 | — | — | 7:47 | — | — | 7:45 | — | — | 7:43 | — |
mm | — | — | 2 | — | — | — | — | — | — | — | — | — | — | — | 2 | — | 2 | — | — | — | 3 |
Temp °C | 20 | 19 | 20 | 17 | 17 | 16 | 15 | 16 | 16 | 23 | 22 | 18 | 17 | 18 | 15 | 16 | 16 | 14 | 15 | 15 | 14 |
Feels °C | 17 | 15 | 14 | 12 | 11 | 12 | 13 | 14 | 15 | 19 | 18 | 17 | 12 | 12 | 9 | 8 | 9 | 8 | 10 | 9 | 11 |
Swell 1 Height (m) Direction Period (s) | — | — | — | — | — | W 7 | W 7 | W 6 | W 10 | WSW 9 | WSW 8 | W 9 | W 12 | — | — | — | — | W 9 | W 7 | W 8 | W 8 |
| kJ | — | — | — | — | — | 116 | 43 | 18 | 47 | 27 | 24 | 55 | 472 | — | — | — | — | 219 | 77 | 21 | 28 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | WSW 9 | WSW 10 | — | — | — | W 16 | — | — | — | — | — | — | WSW 8 | — | W 8 |
| kJ | — | — | — | — | — | — | 29 | 31 | — | — | — | 5 | — | — | — | — | — | — | 24 | — | 5 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | W 14 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | 4 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | W 8 | W 8 | WSW 7 | W 8 | W 8 | — | — | — | — | SE 3 | S 3 | — | W 9 | W 12 | W 8 | W 9 | W 9 | — | — | W 6 | — |
| kJ | 135 | 164 | 136 | 284 | 282 | — | — | — | — | 2 | 1 | — | 137 | 390 | 334 | 439 | 482 | — | — | 36 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 142 | 300 | 215 | 139 | 348 | 88 | 28 | 131 | 21 | 223 | 223 | 316 | 355 | 570 | 90 | 616 | 300 | 133 | 127 | 238 | 191 |
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.
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