Surf Forecasts:
Llantwit Major surf forecast from 20 Aug 2026:
- Best quality surf: Thursday 20 Aug, 10PM (local time) - 3ft (0.9m), 6s period, W swell with cross-offshore winds.
- Most powerful swell: Thursday 20 Aug, 10PM (local time) - 3ft (0.9m), 6s period, W swell with 68 kJ wave energy.
- Next surfable swell (1★+): Thursday 20 Aug, 10PM (local time) - 3ft (0.9m), 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 0.9m and 6s period with a secondary swell of 0.5m and 9s. 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 6s and forecast to arrive on Thursday (Aug 20) at 10PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Monday (Aug 24) at 1PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Thu 20th Aug) | 3ft (0.9m) 6s |
| Best Surf | 10PM (Thu 20th Aug) | 3ft (0.9m) 6s |
| Most Powerful | 10PM (Thu 20th Aug) | 3ft (0.9m) 6s |
Table - best surf conditions forecast for Llantwit Major over the next 16 days.
The Lowdown
Alright, grab a coffee, let’s talk about Llantwit Major. It’s been a bit of a sad story lately. There’s very little surf over the next week and a half, so we’re looking at a long stretch of nothing exciting until we hit the end of the month. The water is sitting around 69°, which is a wild 8° warmer than usual for this time of year – that’s very unusual, a real anomaly.
For Thursday the 20th, we’ve got some waist-high, 4ft to 4ft swell, but it’s coming from the west with a short 7-second period and a stiff cross-onshore wind, making it choppy and poor. Not worth paddling out for. Friday the 21st morning turns glassy with an offshore, but the swell drops to 2ft – it’s just too small to do anything with.
That gap continues. Saturday the 22nd and Sunday the 23rd see tiny 0.7ft to 1ft leftover energy. You might get a clean, glassy surface on Sunday afternoon, but there’s not enough push to ride. Monday the 24th through to the following week are essentially flat or knee-high at best, with clean conditions but no swell to speak of. The combined wave energy is barely registering, often below 20 (weak).
The first real sign of life doesn’t show up until Saturday the 29th of August. We get a pulse of 6ft west swell with a 9-second period, actually producing some solid moderate energy (476). The morning breaks with light easterly wind keeping it clean. This is the standout of the whole outlook. For an intermediate surfer, those chest-high lines will be worth the wait. By the afternoon, the wind swings onshore and the quality drops fast, so you’ll want to be out early.
The wave period is moderate, not super long, so the point break should handle it okay. The optimum direction is southwest, but this west swell is close enough to work.
A few decent little pulses roll through Sunday the 30th and into the start of September, but they’re small and mixed in with rain and onshore winds. Tuesday the 1st dips back to tiny, messy waves, and Wednesday the 2nd offers a cleaner, offshore morning with a knee-high 3ft swell, but it’s weak energy (56) and won't hold your attention long.
So if you ask me, mark your calendar for the morning of Saturday the 29th. Everything else between now and then is a waiting game.
Rusty
Short Range ForecastLight rain (total 4mm), mostly falling on Thu night. Warm (max 20°C on Sun morning, min 12°C on Thu night). Winds decreasing (fresh winds from the W on Thu afternoon, calm by Fri morning). | Days 5-7 Weather SummaryModerate rain (total 12mm), heaviest on Tue night. Warm (max 25°C on Mon afternoon, min 14°C on Sun night). Winds increasing (calm on Sun afternoon, fresh winds from the ENE by Mon night). | |||||||||||||||||||
Thu 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | ||||||||||||||
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 7 | W 6 | W 7 | W 8 | WNW 5 | W 8 | W 9 | W 9 | W 9 | W 9 | W 11 | W 10 | W 9 | W 9 | W 8 | W 10 | W 10 | W 9 | W 8 | W 9 |
Wave Graph  | ||||||||||||||||||||
 kJ | 158 | 47 | 22 | 12 | 8 | 5 | 13 | 6 | 6 | 6 | 2 | 2 | 2 | 2 | 1 | 2 | 7 | 14 | 12 | 60 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-off | glassy | cross-on | off | cross-off | cross-on | cross-off | cross-off | glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross | cross-on | cross-on | cross-off |
High Tide | 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 | 6:31AM7.75m | 6:49PM8.28m | ||||||||
Low Tide | 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 | 12:46PM1.98m | 1:09AM1.63m | |||||||
 |  |  | |  |  | |  | | | |  | |  | |  | | | | | |
 | — | — | 6:07 | — | — | 6:09 | — | — | 6:11 | — | — | 6:13 | — | — | 6:13 | — | — | 6:16 | — | — |
 | 8:27 | — | — | 8:24 | — | — | 8:22 | — | — | 8:20 | — | — | 8:17 | — | — | 8:15 | — | — | 8:14 | — |
mm | — | 1 | 1 | 2 | — | — | — | — | — | — | — | — | — | 1 | 1 | 1 | 7 | 2 | 2 | 7 |
Temp °C | 18 | 14 | 16 | 17 | 16 | 17 | 19 | 17 | 20 | 22 | 19 | 21 | 25 | 18 | 24 | 24 | 18 | 19 | 20 | 18 |
Feels °C | 12 | 12 | 15 | 14 | 14 | 14 | 16 | 14 | 18 | 20 | 17 | 14 | 18 | 11 | 19 | 20 | 16 | 17 | 20 | 17 |
Swell 1 Height (m) Direction Period (s) | — | W 6 | W 7 | W 7 | WNW 5 | W 8 | W 9 | W 9 | W 9 | W 9 | W 8 | W 10 | W 9 | W 9 | W 8 | W 8 | W 10 | WSW 5 | W 8 | W 9 |
| kJ | — | 47 | 22 | 8 | 8 | 5 | 13 | 6 | 6 | 6 | 1 | 2 | 2 | 2 | 1 | 1 | 7 | 4 | 12 | 60 |
Swell 2 Height (m) Direction Period (s) | — | W 9 | W 9 | W 8 | W 8 | WNW 4 | W 10 | WNW 3 | — | — | W 11 | W 8 | — | — | — | W 10 | — | W 9 | — | — |
| kJ | — | 41 | 14 | 12 | 5 | 1 | 2 | 1 | — | — | 2 | 1 | — | — | — | 2 | — | 14 | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | W 10 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | W 7 | — | — | NW 3 | — | — | — | — | — | — | — | E 2 | E 3 | E 3 | E 3 | SE 3 | S 3 | S 3 | SW 4 | — |
| kJ | 158 | — | — | 2 | — | — | — | — | — | — | — | 1 | 5 | 6 | 3 | 2 | 1 | 1 | 10 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 300 | 0 | 39 | 227 | 194 | 51 | 196 | 59 | 111 | 160 | 51 | 382 | 286 | 311 | 311 | 170 | 144 | 191 | 57 | 0 |
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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