Surf Forecasts:
Llantwit Major surf forecast from 15 Aug 2026:
- Best quality surf: Thursday 20 Aug, 10PM (local time) - 2.5ft (0.8m), 6s period, W swell with cross-offshore winds.
- Most powerful swell: Thursday 20 Aug, 4AM (local time) - 4.5ft (1.3m), 8s period, W swell with 186 kJ wave energy.
- Next surfable swell (1★+): Thursday 20 Aug, 10PM (local time) - 2.5ft (0.8m), 6s period with W swell.
Best Forecast Surf Conditions for Llantwit Major this week:
The surf forecast for Llantwit Major over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Aug 20) at 10PM. The primary swell is predicted to be 0.8m and 6s period with a secondary swell of 0.3m and 8s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Llantwit Major in the next 16 days are 1.3m 8s and forecast to arrive on Thursday (Aug 20) at 4AM. Winds are predicted to be cross-shore at the time the swell arrives.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Thu 20th Aug) | 2.5ft (0.8m) 6s |
| Best Surf | 10PM (Thu 20th Aug) | 2.5ft (0.8m) 6s |
| Most Powerful | 4AM (Thu 20th Aug) | 4.5ft (1.3m) 8s |
Table - best surf conditions forecast for Llantwit Major over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s get straight into it for Llantwit Major.
Honestly, for the next couple of weeks, it’s a tough one. The surf is not really on the table. The wave energy is weak, and the conditions are messy. The water temperature is sitting at 70°, which is much warmer than normal for this time of year, so that’s a nice little bonus if you’re just going for a dip.
The first real sniff of anything halfway decent doesn’t show up until Tuesday, 25th August. Even then, it’s just a small, messy 2ft swell from the west with a period of 9 seconds, and energy is a weak 74. The wind is light and cross-off, so it’ll be clean, but it’s only rated as “surfable waves but very ordinary conditions.” It’s a far cry from good.
The standout, if you can call it that, is actually the morning of Saturday, 29th August. The wind goes glassy, with a light offshore from the south-southwest, and we’ve got a tiny 1ft swell from the west-southwest. The period is a very long 16 seconds, which is a proper groundswell, but it’s so small it’s barely going to break. The energy is only 30. This is definitely one for the experts on a longboard, maybe at the point, but don’t expect much.
The rest of the run is a write-off. There’s a gap of several days with no recommendations at all. The wind is mostly cross-on or onshore, and the swell is either too small or too messy. There’s a bit of a pulse around the 28th, with 4ft swell and energy hitting 156, but it’s lumpy and cross-shore, so it’s more of a kite-surfing setup than anything for a paddle.
So, keep your expectations low. It’s a flat spell, but it won’t last forever. Forecasts can change.
Rusty.
Short Range ForecastMostly dry. Warm (max 23°C on Sat afternoon, min 14°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 6mm), mostly falling on Tue night. Very mild (max 19°C on Tue morning, min 14°C on Tue night). Mainly fresh winds. | |||||||||||||||||||
Fri 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | ||||||||||||||
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 | WSW 8 | W 8 | WSW 8 | W 7 | W 7 | W 7 | W 4 | W 5 | W 5 | W 7 | W 6 | W 6 | W 6 | W 6 | W 6 | W 7 | W 7 | W 6 | W 6 |
Wave Graph  | ||||||||||||||||||||
 kJ | 40 | 22 | 20 | 20 | 40 | 10 | 9 | 4 | 7 | 29 | 9 | 79 | 58 | 23 | 62 | 143 | 177 | 150 | 84 | 23 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | glassy | cross-off | cross-on | glassy | glassy | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross-on | cross-on | cross | cross | cross-off |
High Tide | 8:49PM10.26m | 9:10AM9.85m | 9:28PM10.12m | 9:48AM9.61m | 10:07PM9.71m | 10:26AM9.17m | 10:44PM9.09m | 11:03AM8.57m | 11:22PM8.36m | 11:41AM7.90m | 00:02AM7.58m | 12:23PM7.20m | 00:50AM6.85m | |||||||
Low Tide | 3:06AM0.13m | 3:18PM0.29m | 3:41AM0.30m | 3:53PM0.51m | 4:15AM0.67m | 4:28PM0.92m | 4:49AM1.20m | 5:03PM1.47m | 5:24AM1.81m | 5:41PM2.10m | 6:03AM2.46m | 6:27PM2.74m | ||||||||
 |  |  | |  | | | | | | | | |  | | | | | |  | |
 | — | — | 5:58 | — | — | 6:00 | — | — | 6:01 | — | — | 6:03 | — | — | 6:05 | — | — | 6:05 | — | — |
 | 8:38 | — | — | 8:37 | — | — | 8:35 | — | — | 8:32 | — | — | 8:30 | — | — | 8:29 | — | — | 8:27 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | 6 | — | — | — | — | — | — |
Temp °C | 21 | 20 | 22 | 23 | 17 | 20 | 19 | 18 | 19 | 18 | 18 | 19 | 19 | 17 | 17 | 17 | 17 | 17 | 18 | 15 |
Feels °C | 20 | 19 | 19 | 18 | 15 | 16 | 15 | 19 | 17 | 14 | 16 | 17 | 15 | 15 | 11 | 10 | 11 | 12 | 13 | 12 |
Swell 1 Height (m) Direction Period (s) | W 9 | WSW 8 | W 8 | WSW 8 | W 7 | W 7 | W 7 | W 7 | W 7 | W 8 | W 7 | — | — | W 6 | — | — | W 16 | W 7 | — | W 6 |
| kJ | 40 | 22 | 20 | 20 | 40 | 10 | 9 | 4 | 4 | 6 | 9 | — | — | 23 | — | — | 5 | 150 | — | 23 |
Swell 2 Height (m) Direction Period (s) | — | W 4 | — | — | — | WNW 4 | — | — | — | — | W 7 | — | — | — | — | — | — | — | — | W 8 |
| kJ | — | 2 | — | — | — | 1 | — | — | — | — | 4 | — | — | — | — | — | — | — | — | 13 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | WNW 3 | — | NW 4 | NW 3 | — | — | WNW 2 | W 4 | W 5 | W 5 | W 5 | W 6 | W 6 | — | W 6 | W 6 | W 7 | — | W 6 | — |
| kJ | 1 | — | 3 | 3 | — | — | 1 | 4 | 7 | 29 | 8 | 79 | 58 | — | 62 | 143 | 177 | — | 84 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 142 | 197 | 434 | 359 | 214 | 196 | 384 | 263 | 460 | 300 | 396 | 355 | 191 | 131 | 704 | 349 | 404 | 133 | 40 | 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.
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