Surf Forecasts:
Llantwit Major surf forecast from 16 Aug 2026:
- Best quality surf: Friday 21 Aug, 1AM (local time) - 2.5ft (0.7m), 6s period, W swell with cross-offshore winds.
- Most powerful swell: Thursday 20 Aug, 4PM (local time) - 4.5ft (1.3m), 7s period, W swell with 161 kJ wave energy.
- Next surfable swell (1★+): Friday 21 Aug, 1AM (local time) - 2.5ft (0.7m), 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 Friday (Aug 21) at 1AM. The primary swell is predicted to be 0.7m and 6s period with a secondary swell of 0.4m 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 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. The largest open ocean swell (not directed at the beach) is 0.3m 2s period and expected on Sunday (Aug 23) at 1PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Fri 21st Aug) | 2.5ft (0.7m) 6s |
| Best Surf | 1AM (Fri 21st Aug) | 2.5ft (0.7m) 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 what we’ve got for the next couple of weeks.
Honestly, it’s a pretty grim picture for Llantwit Major. We’re looking at a long, drawn-out period of poor surf conditions from the 16th of August right through to the end of the month. There’s very little to get excited about.
We start off with tiny, weak swell right now. Sunday morning the 16th has a glassy sea with only 1ft of westerly swell, period of 7 seconds, and the water is a very unusual 70° – that’s much warmer than normal for the time of year. But with the combined energy only at 10, there’s just nothing there to ride. The rest of the first week is a write-off. Constant cross-onshore winds, mostly from the west or west-northwest, keep the sea messy. The swell does build a bit by Thursday the 20th, with 4ft and combined energy reaching 161, but with fresh cross-shore winds, it’s a lumpy, choppy mess. No quality.
There’s a gap of several days with no real hope. The second half of the week starting the 21st sees the swell drop right back to tiny levels. We get a bit of a clean-up on the 23rd and 24th with offshore and cross-offshore winds from the ENE, but the swell is barely 0.7ft. The energy is almost nothing. It’s clean, but flat.
Looking further out into the last week of August, the 28th and 29th show a slight bump in swell, with a 4ft westerly swell on Friday morning the 28th. The period is 8 seconds and the combined energy is up to 177. But the wind is onshore or cross-shore, so the surface will be far from clean. By Saturday the 29th, we get a fresh cross-onshore wind at 22 mph, making it lumpy and tough. That’s not where you want to be.
Overall, there is no standout period here. Even the slightly bigger swell on the 28th is ruined by the wind. Given the persistent cross-onshore wind and poor surf quality, and that this is a point break, I’d say this setup looks more interesting for kite surfing than paddle surfing if you have the gear. For the rest of us, it’s a waiting game.
Rusty.
Short Range ForecastSome drizzle, heaviest during Mon night. Warm (max 20°C on Mon morning, min 14°C on Tue night). Winds increasing (calm on Sun morning, fresh winds from the W by Tue afternoon). | Days 4-6 Weather SummaryLight rain (total 7mm), mostly falling on Thu night. Very mild (max 17°C on Wed morning, min 13°C on Thu night). Winds decreasing (fresh winds from the W on Wed afternoon, calm by Fri night). | ||||||||||||||||||||
Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | |||||||||||||||
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 7 | W 7 | WNW 4 | W 5 | W 6 | W 5 | W 6 | W 6 | W 6 | W 6 | W 6 | W 7 | W 7 | W 7 | W 6 | W 5 | W 6 | W 5 | W 8 | W 10 | W 10 |
Wave Graph  | |||||||||||||||||||||
 kJ | 10 | 9 | 4 | 8 | 39 | 13 | 63 | 62 | 33 | 78 | 105 | 142 | 150 | 161 | 39 | 15 | 29 | 8 | 12 | 8 | 17 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross-off | cross-on | cross-on | cross-off | glassy | cross-on | off |
High Tide | 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 | 1:20PM6.59m | 2:00AM6.30m | 2:46PM6.24m | 3:38AM6.17m | ||||||||
Low Tide | 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 | 6:54AM3.07m | 7:29PM3.29m | 8:06AM3.51m | 8:57PM3.57m | ||||||||
 |  |  | | |  | | | | |  | | |  | | | | | | |  | |
 | 6:00 | — | — | 6:01 | — | — | 6:03 | — | — | 6:05 | — | — | 6:05 | — | — | 6:07 | — | — | 6:09 | — | — |
 | — | 8:35 | — | — | 8:32 | — | — | 8:30 | — | — | 8:29 | — | — | 8:27 | — | — | 8:24 | — | — | 8:22 | — |
mm | — | — | — | — | — | 1 | — | — | — | — | 2 | 2 | — | — | 3 | — | — | — | — | — | — |
Temp °C | 18 | 18 | 18 | 20 | 18 | 18 | 19 | 18 | 17 | 17 | 17 | 16 | 17 | 17 | 14 | 17 | 17 | 14 | 16 | 19 | 16 |
Feels °C | 18 | 14 | 19 | 19 | 14 | 15 | 17 | 13 | 15 | 11 | 11 | 11 | 12 | 11 | 11 | 12 | 12 | 10 | 13 | 15 | 13 |
Swell 1 Height (m) Direction Period (s) | W 7 | W 7 | W 7 | W 5 | — | W 7 | — | — | W 6 | — | — | W 7 | — | — | W 6 | W 5 | W 13 | W 5 | W 8 | W 10 | W 10 |
| kJ | 10 | 9 | 4 | 8 | — | 10 | — | — | 33 | — | — | 142 | — | — | 39 | 15 | 3 | 8 | 12 | 8 | 17 |
Swell 2 Height (m) Direction Period (s) | — | — | — | W 7 | — | — | — | — | — | — | — | — | — | — | WSW 9 | W 8 | — | W 8 | W 11 | W 8 | — |
| kJ | — | — | — | 4 | — | — | — | — | — | — | — | — | — | — | 25 | 12 | — | 5 | 9 | 5 | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | W 9 | — | — | — | — | — | — | — | — | — | — | — | — | — | W 12 | — | — | — |
| kJ | — | — | — | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | 3 | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | WNW 4 | — | W 6 | W 5 | W 6 | W 6 | — | W 6 | W 6 | — | W 7 | W 7 | — | — | W 6 | — | — | — | — |
| kJ | — | — | 4 | — | 39 | 13 | 63 | 62 | — | 78 | 105 | — | 150 | 161 | — | — | 29 | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 257 | 418 | 271 | 349 | 300 | 396 | 275 | 1142 | 383 | 473 | 300 | 511 | 88 | 349 | 0 | 349 | 348 | 194 | 326 | 344 | 138 |
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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