Surf Forecasts:
Llantwit Major surf forecast from 19 Aug 2026:
- Best quality surf: Thursday 20 Aug, 10PM (local time) - 3.5ft (1.0m), 6s period, W swell with offshore winds.
- Most powerful swell: Thursday 20 Aug, 4PM (local time) - 4.5ft (1.3m), 7s period, W swell with 163 kJ wave energy.
- Next surfable swell (1★+): Thursday 20 Aug, 10PM (local time) - 3.5ft (1.0m), 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 1.0m and 6s period with a secondary swell of 0.5m and 9s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Llantwit Major in the next 16 days are 1.3m 7s and forecast to arrive on Thursday (Aug 20) at 4PM. 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) | 3.5ft (1.0m) 6s |
| Best Surf | 10PM (Thu 20th Aug) | 3.5ft (1.0m) 6s |
| Most Powerful | 4PM (Thu 20th Aug) | 4.5ft (1.3m) 7s |
Table - best surf conditions forecast for Llantwit Major over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s have a look at the next few weeks for our local stretch.
To be straight with you, this is a tough run. The whole 16-day window is basically a write-off for any decent surf. We’ve got nothing but poor conditions across the board, with scores coming in at zero every single session. The first real chance of a wave is on Wednesday morning the 19th, and straight away it’s a letdown: a weak 2ft swell from the west, a short 6-second period, and a cross-onshore wind from the WNW at 9 mph making it choppy. Combined energy is a paltry 36, which tells you how little power is in the water. The water temp is 70°, which is a massive 8° warmer than normal for this time of year – that’s very unusual, and honestly, it’s about the only thing that’s out of the ordinary here.
The pattern stays in the gutter for days. Thursday the 20th sees a slight bump with a 4ft west swell and a better 8-second period, giving us moderate energy around 160-178, but it’s still cross-onshore and choppy. Friday the 21st morning goes glassy with a north wind at 0 mph, but the swell drops back to 2ft and the energy is weak at 51. That glassy window is a tease – the surf is too small to bother with.
From there, it’s a long, painful slide. Saturday the 22nd through to Tuesday the 3rd of September is a near-continuous stretch of tiny to flat waves, with swell heights mostly between 0.3ft and 2ft, periods of 6-9 seconds, and cross-onshore or onshore winds most of the time. The energy levels go from a pathetic 6 up to 81, but never enough to get excited about. There are a few moments of clean, offshore wind – like Monday the 25th morning with a fresh 19 mph NE offshore – but the wave height is only 0.7ft. You’d need a sea breeze to stand up in that.
The only slight uptick comes on Monday the 31st of August afternoon, when the swell pushes to 5ft from the west with a 7-second period and energy hits 210 (moderate). But it’s coming with a fresh 22 mph cross-onshore wind, making it lumpy and messy – not a paddle-surfing day. If you’re into kiting, that might be your moment with that much wind and some size.
Really, there’s nothing here to recommend. Llantwit Major is a point break that is fairly consistent and fairly exposed to the west, and the optimum direction is SW, but we never get that. The winds are wrong almost every session. This is one of those blanks that’s more normal for the area when the patterns don’t align. Hang in there – forecasts can change, but right now, leave the board in the van.
Rusty
Short Range ForecastLight rain (total 6mm), mostly falling on Thu morning. Very mild (max 18°C on Wed morning, min 12°C on Fri night). Winds decreasing (fresh winds from the W on Wed afternoon, calm by Thu night). | Days 4-6 Weather SummaryMostly dry. Warm (max 23°C on Mon afternoon, min 13°C on Sat night). Wind will be generally light. | ||||||||||||||||||||
Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | |||||||||||||||
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 6 | W 4 | W 7 | W 7 | W 7 | W 6 | W 8 | W 6 | WNW 5 | W 8 | W 9 | W 9 | W 9 | W 9 | W 8 | W 8 | W 9 | W 9 | W 8 | W 8 | W 10 |
Wave Graph  | |||||||||||||||||||||
 kJ | 36 | 36 | 110 | 156 | 163 | 51 | 50 | 22 | 8 | 12 | 6 | 6 | 6 | 6 | 5 | 6 | 6 | 6 | 5 | 5 | 29 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | cross | glassy | cross-off | cross-on | off | cross-off | cross-off | off | cross-off | cross-on | off | cross-off | off | off | off | cross-off | glassy |
High Tide | 11:41AM7.90m | 00:02AM7.58m | 12:23PM7.20m | 00:50AM6.85m | 1:20PM6.59m | 2:00AM6.30m | 2:46PM6.24m | 3:38AM6.17m | 4:21PM6.41m | 4:58AM6.53m | 5:25PM6.95m | 5:50AM7.11m | 6:11PM7.61m | ||||||||
Low Tide | 5:41PM2.10m | 6:03AM2.46m | 6:27PM2.74m | 6:54AM3.07m | 7:29PM3.29m | 8:06AM3.51m | 8:57PM3.57m | 9:44AM3.57m | 10:37PM3.38m | 11:10AM3.19m | 11:46PM2.85m | 12:06PM2.60m | 00:32AM2.23m | ||||||||
 | |  |  | |  | | | |  | | | | | | | |  | | |  | |
 | 6:05 | — | — | 6:05 | — | — | 6:07 | — | — | 6:09 | — | — | 6:11 | — | — | 6:13 | — | — | 6:13 | — | — |
 | — | 8:29 | — | — | 8:27 | — | — | 8:24 | — | — | 8:22 | — | — | 8:20 | — | — | 8:17 | — | — | 8:15 | — |
mm | — | — | — | 1 | 1 | 1 | 2 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | 16 |
Temp °C | 18 | 18 | 16 | 18 | 18 | 15 | 15 | 17 | 15 | 18 | 19 | 17 | 19 | 19 | 19 | 21 | 23 | 20 | 20 | 19 | 17 |
Feels °C | 14 | 12 | 12 | 13 | 13 | 13 | 14 | 14 | 13 | 16 | 16 | 14 | 17 | 16 | 16 | 16 | 18 | 16 | 19 | 18 | 16 |
Swell 1 Height (m) Direction Period (s) | W 6 | — | W 7 | — | — | W 6 | W 8 | W 8 | WNW 5 | W 8 | W 9 | WNW 4 | W 9 | W 9 | WNW 5 | W 8 | W 9 | W 9 | W 8 | W 8 | W 10 |
| kJ | 36 | — | 110 | — | — | 51 | 50 | 6 | 8 | 12 | 6 | 2 | 6 | 6 | 2 | 6 | 6 | 6 | 5 | 5 | 29 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | W 9 | — | W 8 | W 8 | W 10 | WNW 4 | W 9 | — | — | W 8 | — | — | — | — | — | — |
| kJ | — | — | — | — | — | 41 | — | 6 | 5 | 2 | 2 | 6 | — | — | 5 | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | W 6 | W 10 | W 5 | — | — | — | — | — | — | — | W 10 | — |
| kJ | — | — | — | — | — | — | — | — | — | 1 | 2 | 1 | — | — | — | — | — | — | — | 2 | — |
Wind waves Height (m) Direction Period (s) | — | W 4 | — | W 7 | W 7 | — | — | W 6 | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | 36 | — | 156 | 163 | — | — | 22 | — | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 349 | 300 | 475 | 90 | 271 | 0 | 39 | 127 | 59 | 64 | 196 | 59 | 94 | 452 | 196 | 381 | 469 | 355 | 214 | 300 | 65 |
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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