Surf Forecasts:
Llantwit Major surf forecast from 9 Sep 2026:
- Best quality surf: Wednesday 16 Sep, 7AM (local time) - 7ft (2.2m), 9s period, W swell with cross-offshore winds.
- Most powerful swell: Wednesday 16 Sep, 7AM (local time) - 7ft (2.2m), 9s period, W swell with 736 kJ wave energy.
- Next surfable swell (1★+): Tuesday 15 Sep, 10PM (local time) - 3.5ft (1.1m), 7s period with WSW 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 Tuesday (Sep 15) at 10PM. The primary swell is predicted to be 1.1m and 7s period. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Llantwit Major in the next 16 days are 2.2m 9s and forecast to arrive on Wednesday (Sep 16) at 7AM. Winds are predicted to be cross-offshore at the time the swell arrives.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Tue 15th Sep) | 3.5ft (1.1m) 7s |
| Best Surf | 7AM (Wed 16th Sep) | 7ft (2.2m) 9s |
| Most Powerful | 7AM (Wed 16th Sep) | 7ft (2.2m) 9s |
Table - best surf conditions forecast for Llantwit Major over the next 16 days.
The Lowdown
Alright, let’s break this down. Llantwit Major is in a bit of a drought. The water's about 67°F, which is a fair bit warmer than you'd expect for this time of year, but it doesn't change the fact there's barely a wave to be had.
For the first week, from Wednesday the 9th through to Tuesday the 15th, it's all poor surf. Onshore and cross-onshore winds from the West, tiny swell heights between 1 and 4 feet, and weak combined energy readings from about 22 to 130. It's choppy and flat. No reason to get in the water.
The only real hope comes on Wednesday the 16th. The morning shows a 7ft swell from the West, with a moderate offshore wind from the NNE. The combined energy is a meaty 580, and the conditions are clean. That's real groundswell, but at 7ft it's big on a point break and will be for the experienced crew only. By the afternoon the swell drops to 6ft, but the wind turns to a cross-offshore from the NW, so it stays clean but loses some punch. 16th September is your lone standout.
After that, it's back to the same story. From Thursday the 17th right through to Thursday the 24th, it's all poor again. Tiny waves, messy winds, and energy readings dropping all the way to a pathetic 15 on the 19th. You get some glassy mornings on the 18th and the 24th, but with swell only 2ft and 1ft, it’s not worth the wait.
If you’re on a paddle board, you’ve got one day to aim for: the 16th. Otherwise, this is a 16-day stretch that’s a bust. A kite surfer might enjoy the consistent Westerly wind and some 3-4ft chop around the 12th and 20th, but for a surfer, it's grim. That one day on the 16th is your shot, and it’s a short one.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Thu afternoon. Very mild (max 18°C on Thu morning, min 12°C on Wed night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 20°C on Mon morning, min 16°C on Sat night). Winds decreasing (fresh winds from the WSW on Sat afternoon, calm by Mon night). | ||||||||||||||||||||
Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | |||||||||||||||
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 | W 8 | WSW 8 | WSW 5 | W 9 | W 10 | W 9 | W 8 | W 8 | W 7 | W 7 | W 7 | W 10 | W 10 | W 9 | W 9 | W 6 | W 8 | W 7 | W 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 108 | 44 | 31 | 19 | 29 | 263 | 183 | 103 | 51 | 64 | 130 | 156 | 80 | 154 | 90 | 42 | 40 | 15 | 44 | 27 | 279 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross-on | cross-on | on | cross-on | cross-on | cross-on | on | on | on | cross-on | cross-on | cross-on | cross-on | on | cross-on | on | cross | cross-on | off |
High Tide | 6:21PM9.04m | 6:46AM9.10m | 7:06PM9.68m | 7:28AM9.61m | 7:46PM10.08m | 8:06AM9.89m | 8:24PM10.19m | 8:43AM9.91m | 9:00PM10.03m | 9:18AM9.69m | 9:35PM9.62m | 9:52AM9.26m | 10:09PM9.03m | ||||||||
Low Tide | 12:22PM1.51m | 00:49AM0.99m | 1:05PM0.89m | 1:29AM0.48m | 1:42PM0.46m | 2:04AM0.20m | 2:16PM0.24m | 2:35AM0.16m | 2:47PM0.25m | 3:06AM0.33m | 3:19PM0.47m | 3:36AM0.70m | 3:50PM0.88m | ||||||||
 |  |  | |  |  |  | | | | | | | | | | |  | | | | |
 | 6:37 | — | — | 6:39 | — | — | 6:41 | — | — | 6:43 | — | — | 6:43 | — | — | 6:46 | — | — | 6:47 | — | — |
 | — | 7:43 | — | — | 7:40 | — | — | 7:38 | — | — | 7:36 | — | — | 7:34 | — | — | 7:31 | — | — | 7:29 | — |
mm | — | — | — | — | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 16 |
Temp °C | 16 | 16 | 14 | 18 | 18 | 17 | 17 | 17 | 15 | 18 | 18 | 17 | 18 | 17 | 18 | 20 | 20 | 18 | 24 | 25 | 20 |
Feels °C | 12 | 12 | 11 | 14 | 14 | 14 | 15 | 14 | 14 | 14 | 14 | 14 | 16 | 15 | 19 | 19 | 18 | 18 | 24 | 23 | 22 |
Swell 1 Height (m) Direction Period (s) | W 7 | W 7 | W 8 | WSW 8 | W 11 | W 9 | W 10 | W 9 | W 8 | — | — | W 7 | W 7 | W 10 | W 10 | W 9 | W 9 | W 6 | W 8 | W 7 | — |
| kJ | 108 | 44 | 31 | 19 | 2 | 263 | 183 | 103 | 51 | — | — | 156 | 80 | 154 | 90 | 42 | 40 | 15 | 44 | 27 | — |
Swell 2 Height (m) Direction Period (s) | — | WSW 8 | W 13 | W 12 | W 11 | — | — | — | — | — | — | — | W 10 | — | — | — | — | WSW 9 | W 11 | W 11 | — |
| kJ | — | 24 | 3 | 3 | 2 | — | — | — | — | — | — | — | 50 | — | — | — | — | 15 | 3 | 9 | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | WSW 5 | — | — | — | — | W 8 | W 7 | — | W 7 | — | — | — | — | — | — | S 3 | W 7 |
| kJ | — | — | — | — | 29 | — | — | — | — | 64 | 130 | — | 47 | — | — | — | — | — | — | 7 | 279 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 40 | 58 | 65 | 184 | 257 | 74 | 39 | 95 | 108 | 142 | 300 | 134 | 39 | 88 | 32 | 129 | 191 | 57 | 21 | 50 | 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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