Surf Forecasts:
Llantwit Major surf forecast from 7 Sep 2026:
- Best quality surf: Monday 14 Sep, 4AM (local time) - 2.5ft (0.7m), 9s period, W swell with glassy winds.
- Most powerful swell: Monday 7 Sep, 1PM (local time) - 4ft (1.2m), 13s period, W swell with 498 kJ wave energy.
- Next surfable swell (1★+): Monday 14 Sep, 4AM (local time) - 2.5ft (0.7m), 9s 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 Monday (Sep 14) at 4AM. The primary swell is predicted to be 0.7m and 9s 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 1.2m 13s and forecast to arrive on Monday (Sep 07) at 1PM. 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 (Mon 14th Sep) | 2.5ft (0.7m) 9s |
| Best Surf | 4AM (Mon 14th Sep) | 2.5ft (0.7m) 9s |
| Most Powerful | 1PM (Mon 7th Sep) | 4ft (1.2m) 13s |
Table - best surf conditions forecast for Llantwit Major over the next 16 days.
The Lowdown
Alright, let’s get real about the outlook here, folks. I’m lookin’ at the data for Llantwit Major and, to be honest, it’s a tough stretch. The whole 16-day window is a bit of a grind. The biggest issue is that the wind and swell are almost never lining up for us.
Right out of the gate on Monday the 7th, we’ve got some moderate energy coming in—about 4ft to 4ft of swell from the west, with a combined energy reading of 650, which is moderate wave energy. But the wind is howling from the west-northwest at 16 mph, creating a messy cross-chop. It’s just poor conditions, not worth paddling out. This pattern of onshore and cross-onshore winds and choppy seas pretty much holds through the entire first week and into the second.
The water is a notable factor here. At 67°F, that’s a full 6°F warmer than average for this time of year. That’s very unusual. Don’t need a wetsuit if you’re brave enough to deal with the poor surf.
We get a glimmer of hope right around Wednesday the 16th. The wind swings around to the east at 9 mph, giving us a cross-offshore breeze and clean faces. The swell is small, only 2ft from the west, but it’s a long-period groundswell at 10 seconds. The combined energy is only 78, so weak. It’s surfable but very ordinary. The best bet is Wednesday morning. The glassy conditions on Sunday the 20th afternoon are also worth a mention—east-southeast wind at just 3 mph, glassy, with a clean 3ft west swell at 11 seconds, giving us 202 in combined energy. That’s the standout. The swell direction is west, which isn't a perfect match for the optimum south-west, but the glassy wind is a major positive. It'll be clean, but small.
Honestly, there are no big swells to get excited about. Nothing over 5ft. It’s all below that, so beginners wouldn’t be out of their depth, but the conditions are rarely good for anyone. For the two small clean windows on the 16th and 20th, it’s more of a longboard or funboard session. Don't expect any barrels.
Given the consistent poor quality for such a long stretch, it’s a bit of a waiting game. The break is fairly consistent, so it tends not to stay this bad forever. Forecasts can change.
Rusty.
Short Range ForecastModerate rain (total 17mm), heaviest on Mon night. Very mild (max 17°C on Mon morning, min 13°C on Tue morning). Winds decreasing (fresh winds from the WNW on Tue afternoon, light winds from the W by Wed night). | Days 4-6 Weather SummaryLight rain (total 8mm), mostly falling on Sat afternoon. Very mild (max 18°C on Thu afternoon, min 12°C on Fri night). Winds increasing (calm on Fri night, fresh winds from the WSW by Sat night). | ||||||||||||||||||||
Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | |||||||||||||||
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 14 | W 13 | W 12 | W 8 | W 9 | W 6 | W 7 | W 7 | W 8 | W 8 | W 5 | W 7 | W 8 | W 8 | W 8 | W 8 | WSW 8 | W 7 | W 8 | W 8 | W 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 487 | 483 | 464 | 148 | 325 | 137 | 106 | 44 | 31 | 18 | 11 | 114 | 136 | 90 | 48 | 32 | 22 | 117 | 135 | 76 | 57 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | on | cross | cross | cross | cross | cross-on | cross-on | on | cross-on | on | cross | cross | cross | on | cross-on | on | cross-on | cross-on | on |
High Tide | 4:22PM7.49m | 5:00AM7.66m | 5:29PM8.25m | 5:58AM8.41m | 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 | ||||||||
Low Tide | 10:04AM2.84m | 10:56PM2.41m | 11:26AM2.22m | 00:02AM1.68m | 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 | |||||||
 |  |  |  |  |  | | | | | |  | | |  | | | | | | | |
 | 6:35 | — | — | 6:35 | — | — | 6:37 | — | — | 6:39 | — | — | 6:41 | — | — | 6:43 | — | — | 6:43 | — | — |
 | — | 7:47 | — | — | 7:45 | — | — | 7:43 | — | — | 7:40 | — | — | 7:38 | — | — | 7:36 | — | — | 7:34 | — |
mm | — | — | 12 | 5 | — | — | — | — | — | — | — | 3 | — | — | — | — | 2 | 3 | — | — | — |
Temp °C | 17 | 17 | 16 | 15 | 16 | 15 | 16 | 16 | 14 | 17 | 18 | 17 | 18 | 18 | 15 | 16 | 16 | 18 | 17 | 17 | 16 |
Feels °C | 12 | 12 | 12 | 9 | 8 | 9 | 12 | 11 | 11 | 13 | 13 | 15 | 16 | 15 | 14 | 12 | 11 | 14 | 13 | 13 | 16 |
Swell 1 Height (m) Direction Period (s) | W 14 | — | — | W 8 | — | — | W 7 | WSW 8 | W 8 | W 8 | W 7 | W 7 | W 8 | W 8 | W 8 | W 8 | WSW 8 | W 7 | W 8 | W 8 | W 9 |
| kJ | 487 | — | — | 148 | — | — | 106 | 24 | 31 | 18 | 4 | 114 | 136 | 90 | 48 | 32 | 22 | 117 | 135 | 76 | 57 |
Swell 2 Height (m) Direction Period (s) | — | — | — | W 10 | — | — | — | — | W 13 | W 12 | W 11 | W 10 | — | — | — | W 16 | W 16 | — | — | — | — |
| kJ | — | — | — | 55 | — | — | — | — | 3 | 3 | 2 | 18 | — | — | — | 5 | 5 | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | W 11 | W 13 | W 12 | — | W 9 | W 6 | — | W 7 | — | — | W 5 | — | — | — | — | — | W 4 | — | — | — | — |
| kJ | 163 | 483 | 464 | — | 325 | 137 | — | 44 | — | — | 11 | — | — | — | — | — | 9 | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 48 | 134 | 134 | 40 | 883 | 133 | 39 | 146 | 32 | 191 | 353 | 155 | 28 | 39 | 22 | 57 | 142 | 300 | 355 | 349 | 57 |
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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