Surf Forecasts:
Llantwit Major surf forecast from 11 Aug 2026:
- Best quality surf: Saturday 15 Aug, 4AM (local time) - 2.5ft (0.7m), 8s period, W swell with cross-offshore winds.
- Most powerful swell: Thursday 13 Aug, 7PM (local time) - 3ft (0.9m), 10s period, W swell with 156 kJ wave energy.
- Next surfable swell (1★+): Saturday 15 Aug, 4AM (local time) - 2.5ft (0.7m), 8s 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 Saturday (Aug 15) at 4AM. The primary swell is predicted to be 0.7m and 8s period. 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 0.9m 10s and forecast to arrive on Thursday (Aug 13) at 7PM. 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+) | 4AM (Sat 15th Aug) | 2.5ft (0.7m) 8s |
| Best Surf | 4AM (Sat 15th Aug) | 2.5ft (0.7m) 8s |
| Most Powerful | 7PM (Thu 13th Aug) | 3ft (0.9m) 10s |
Table - best surf conditions forecast for Llantwit Major over the next 16 days.
The Lowdown
Alright, let's see what's on the cards for Llantwit Major for the next couple of weeks. To be honest, it's a pretty grim start, a proper dry spell before we find a window.
The water temperature here is a very unusual 69°, which is about 8° warmer than normal for this time of year. A proper anomaly, that. You'll be warm, but the waves won't be.
The first week is a write-off. From Tuesday the 11th right through to Wednesday the 19th, it's all tiny swells and rubbish cross-onshore winds. There's a little 2ft swell with an 11-second period on Thursday the 13th, giving it a combined energy of 83 (weak), but the wind's all wrong. We even get a glassy morning on Saturday the 16th, but the surf is a pathetic 1ft with only 17 energy units. Totally flat. That's nearly ten days of nothing.
But hang on, there's one golden day. The standout is Thursday the 20th of August. The swell finally kicks in, going from 6ft on Wednesday afternoon to 6ft by Thursday afternoon. That's the biggest surf of the whole forecast, with a combined energy of 408 (moderate) and an 8-second period coming from the WNW.
And the wind is the real story. On Thursday the 20th, we’ve got a cross-offshore breeze from the East at 10 mph in the morning, dropping to a light 6 mph from the East in the afternoon. That'll mean clean, lined-up waves. At 6ft, this one is for intermediate and above; it'll be too much for beginners.
The swell direction lines up with the spot's optimum, and the wind is glassy. Llantwit Major (Vale of Glamorgan) on the 20th is the only real call. Be prepared for crowds, though, because a good day here gets packed.
After that, it's gone again. Friday the 21st sees the swell drop back to 3ft, and the wind turns onshore. The rest of the forecast is just more onshore junk and tiny surf, with energy levels falling away completely.
So, sit tight for the next ten days. Get your gear ready for the 20th of August. That's your day.
Rusty.
Short Range ForecastMostly dry. Warm (max 33°C on Wed afternoon, min 17°C on Tue night). Winds increasing (calm on Wed night, fresh winds from the W by Thu afternoon). | Days 4-6 Weather SummarySome drizzle, heaviest during Sun night. Warm (max 23°C on Fri afternoon, min 13°C on Sat night). Winds decreasing (fresh winds from the NW on Sat afternoon, calm by Sun morning). | ||||||||||||||||||||
Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | |||||||||||||||
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 | W 12 | WSW 10 | WSW 10 | W 9 | W 11 | W 10 | W 10 | W 9 | WSW 9 | W 6 | W 7 | WNW 4 | W 7 | W 7 | W 7 | W 4 | W 7 | W 7 | W 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 5 | 5 | 10 | 34 | 32 | 45 | 83 | 100 | 70 | 60 | 26 | 35 | 22 | 31 | 17 | 17 | 9 | 5 | 4 | 4 | 46 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross-off | cross-off | cross | glassy | cross-on | cross-on | cross-on | cross-on | cross-on | cross-off | cross | cross-on | off | glassy | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 6:33PM9.03m | 7:00AM9.11m | 7:22PM9.68m | 7:46AM9.59m | 8:07PM10.11m | 8:29AM9.85m | 8:49PM10.26m | 9:10AM9.85m | 9:28PM10.12m | 9:48AM9.61m | 10:07PM9.71m | 10:26AM9.17m | 10:44PM9.09m | ||||||||
Low Tide | 12:27PM1.56m | 00:59AM1.09m | 1:18PM0.96m | 1:46AM0.55m | 2:02PM0.52m | 2:28AM0.21m | 2:41PM0.28m | 3:06AM0.13m | 3:18PM0.29m | 3:41AM0.30m | 3:53PM0.51m | 4:15AM0.67m | 4:28PM0.92m | ||||||||
 | |  | | | | | |  | |  | | | | | | |  |  |  | | |
 | 5:52 | — | — | 5:54 | — | — | 5:54 | — | — | 5:56 | — | — | 5:58 | — | — | 6:00 | — | — | 6:01 | — | — |
 | — | 8:45 | — | — | 8:43 | — | — | 8:40 | — | — | 8:38 | — | — | 8:37 | — | — | 8:35 | — | — | 8:32 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 5 | 8 | 1 |
Temp °C | 24 | 28 | 23 | 28 | 33 | 26 | 26 | 25 | 19 | 22 | 23 | 18 | 21 | 23 | 16 | 18 | 18 | 16 | 17 | 19 | 18 |
Feels °C | 22 | 25 | 21 | 24 | 29 | 24 | 22 | 21 | 18 | 19 | 20 | 15 | 16 | 17 | 12 | 15 | 14 | 13 | 17 | 14 | 15 |
Swell 1 Height (m) Direction Period (s) | W 8 | W 8 | W 12 | WSW 10 | WSW 10 | W 9 | W 11 | — | W 10 | W 9 | WSW 9 | W 6 | W 7 | — | WNW 5 | W 7 | W 7 | W 4 | W 7 | W 7 | W 8 |
| kJ | 5 | 5 | 10 | 34 | 32 | 45 | 83 | — | 70 | 60 | 26 | 35 | 22 | — | 12 | 17 | 9 | 5 | 4 | 4 | 46 |
Swell 2 Height (m) Direction Period (s) | W 10 | W 10 | W 8 | — | — | — | — | — | — | — | — | WSW 8 | W 8 | — | W 7 | — | — | W 7 | — | W 10 | — |
| kJ | 2 | 2 | 4 | — | — | — | — | — | — | — | — | 22 | 12 | — | 17 | — | — | 4 | — | 2 | — |
Swell 3 Height (m) Direction Period (s) | W 7 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | W 10 | WNW 4 | — | W 5 | — | — | WNW 4 | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | 100 | 4 | — | 12 | — | — | 31 | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 396 | 330 | 59 | 21 | 51 | 19 | 39 | 348 | 39 | 142 | 58 | 39 | 197 | 197 | 21 | 196 | 385 | 462 | 353 | 359 | 170 |
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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