
Surf Forecasts:
Llantwit Major surf forecast from 11 Sep 2026:
- Most powerful swell: Thursday 17 Sep, 10PM (local time) - 5ft (1.5m), 8s period, W swell with 248 kJ wave energy.
Best Forecast Surf Conditions for Llantwit Major this week:
The most powerful waves expected at Llantwit Major in the next 16 days are 1.5m 8s and forecast to arrive on Thursday (Sep 17) at 10PM. 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+) | - | - |
| Best Surf | - | - |
| Most Powerful | 10PM (Thu 17th Sep) | 5ft (1.5m) 8s |
Table - best surf conditions forecast for Llantwit Major over the next 16 days.
The Lowdown
Right, let’s be straight with you. It’s a bit of a flat, frustrating stretch ahead for Llantwit Major. Looking at the whole 16-day window, I don’t see a single day that’s worth getting properly excited about. There are no good surf options on offer, plain and simple. The swell just doesn’t have any push, and the winds are mostly all over the shop.
We start this Friday, the 11th, with a bit of a pulse but it’s messy. There’s a weak 3ft of west swell pushing through, but a cross-shore breeze is chopping it right up. The combined energy is a paltry 148 (moderate at best). The water is a notable 67°, which is a full 6° warmer than usual for this time of year—that’s a big anomaly, proper unusual. Saturday gets a bit more size at 4ft but the wind swings onshore and it’s junky. The period drops to a weak 6 seconds, but with that wind, it won’t matter.
The first week is all poor surf conditions. Sunday through Tuesday, it’s the same story: small, cross-onshore, and lumpy. The swell energy dips into the double digits, like the 59 and 66 readings, which tells you just how weak it all is. There is a slight bump mid-week on Wednesday the 16th, with early morning waves around 4ft and energy up to 143, but it’s still crossed up and poor. Thursday the 17th sees the biggest swell of the whole period, with 5ft and energy jumping to 242, but it’s accompanied by a fresh cross-onshore wind, so it’s going to be a crumbly, blown-out mess. Not worth the paddle out.
Then it dies. A long, frustrating gap from Friday the 18th all the way through to the end of the window on the 26th. The surf is practically non-existent. We’re talking 1ft or even ankle-slappers. The combined energy drops through the floor into single digits, like the 9 and 7 readings. This isn’t a temporary lull; this is a full-on flat spell.
The only silver lining is that from the 20th onwards, the winds finally turn offshore. But it’s no good when there’s no waves to groom. The swell direction is still from the west, but it’s just too weak. When the period does stretch out to 13 seconds on the 23rd, there’s nothing behind it. The setup here at this point is more interesting for a kite surfer than a paddle surfer.
Honestly, with the surf being this small and weak, and with few consistent waves on the cards, this blank run is a real possibility for the area. You’d be better off doing anything else. Forecasts can change, but this one looks locked in for a whole lot of nothing. Hang loose.
Rusty.
Short Range ForecastLight rain (total 6mm), mostly falling on Sat night. Very mild (max 19°C on Sat morning, min 14°C on Fri night). Winds decreasing (fresh winds from the WSW on Sat afternoon, light winds from the SW by Sun night). | Days 4-6 Weather SummaryLight rain (total 2mm), mostly falling on Wed night. Warm (max 21°C on Mon afternoon, min 12°C on Tue night). Winds increasing (light winds from the W on Mon night, fresh winds from the W by Wed night). | ||||||||||||||||||||
Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | |||||||||||||||
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 10 | W 9 | W 8 | W 8 | W 6 | W 8 | W 7 | W 10 | W 10 | W 9 | W 9 | W 8 | W 8 | W 4 | W 6 | WNW 7 | W 10 | W 10 | W 7 | W 7 | W 8 |
Wave Graph | |||||||||||||||||||||
148 | 103 | 69 | 64 | 119 | 187 | 83 | 122 | 90 | 59 | 76 | 63 | 57 | 39 | 58 | 143 | 188 | 33 | 178 | 242 | 186 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | on | on | on | cross-on | cross-on | cross-on | cross-on | on | cross-on | on | cross | cross | cross | cross | cross-on | cross-on | cross-on | cross-on | cross |
High Tide | 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 | 10:25AM8.68m | 10:43PM8.32m | 10:59AM8.00m | 11:18PM7.56m | ||||||||
Low Tide | 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 | 4:06AM1.21m | 4:22PM1.42m | 4:38AM1.82m | 4:57PM2.07m | ||||||||
6:41 | — | — | 6:43 | — | — | 6:43 | — | — | 6:46 | — | — | 6:47 | — | — | 6:48 | — | — | 6:50 | — | — | |
— | 7:38 | — | — | 7:36 | — | — | 7:34 | — | — | 7:31 | — | — | 7:29 | — | — | 7:27 | — | — | 7:24 | — | |
mm | — | — | — | — | — | 5 | — | — | 1 | — | — | — | — | — | — | — | — | 2 | — | — | — |
Temp °C | 17 | 17 | 15 | 19 | 19 | 18 | 18 | 18 | 18 | 20 | 21 | 18 | 16 | 18 | 14 | 14 | 15 | 16 | 16 | 16 | 14 |
Feels °C | 15 | 14 | 14 | 15 | 14 | 15 | 16 | 16 | 19 | 18 | 19 | 18 | 14 | 12 | 11 | 9 | 10 | 11 | 11 | 10 | 10 |
Swell 1 Height (m) Direction Period (s) | W 10 | W 9 | W 8 | W 8 | — | W 8 | W 7 | W 10 | W 10 | W 9 | — | W 8 | W 8 | W 10 | WSW 10 | — | — | W 10 | — | — | W 8 |
148 | 103 | 69 | 32 | — | 187 | 83 | 122 | 90 | 59 | — | 63 | 57 | 19 | 31 | — | — | 33 | — | — | 186 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | WSW 10 | — | — | — | — | — | W 11 | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | 35 | — | — | — | — | — | 9 | — | — | — | — | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | WNW 2 | — | W 8 | W 6 | — | — | — | — | — | W 9 | — | — | W 4 | W 6 | WNW 7 | W 10 | W 5 | W 7 | W 7 | — |
— | 1 | — | 64 | 119 | — | — | — | — | — | 76 | — | — | 39 | 58 | 143 | 188 | 19 | 178 | 242 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 15 | 40 | 118 | 142 | 300 | 309 | 39 | 88 | 57 | 142 | 142 | 102 | 32 | 32 | 40 | 300 | 559 | 349 | 349 | 88 | |
Best forecast wave conditions in Wales - South East | |||||||||||||||||||||
Best forecast wave conditions in United Kingdom | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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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.










