Surf Forecasts:
Llantwit Major surf forecast from 10 Sep 2026:
- Most powerful swell: Thursday 10 Sep, 10PM (local time) - 4.5ft (1.4m), 8s period, W swell with 264 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 1.4m 8s and forecast to arrive on Thursday (Sep 10) at 10PM. 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+) | - | - |
| Best Surf | - | - |
| Most Powerful | 10PM (Thu 10th Sep) | 4.5ft (1.4m) 8s |
Table - best surf conditions forecast for Llantwit Major over the next 16 days.
The Lowdown
Right then, let’s get this straight. I’ve had a long look at the charts for Llantwit Major, and if you’re hoping for a classic session, you’re going to be waiting a while. The whole 16-day window is a bit of a write-off, if I’m honest. The water is sitting at 67°F, which is a full 6°F warmer than normal for this time of year – that’s very unusual, and honestly, it feels like the sea’s got a bit of a fever. But the warm water is about the only good thing going for it.
The first few days are a total bust. Thursday the 10th sees a tiny 1ft to 3ft swell with a messy 6 to 8-second period, and strong cross-onshore winds from the SSW and SW at 16 mph. The wave energy is feeble, barely registering 21 (combined energy of all swells directed here). It’s just a choppy, blown-out mess. That theme continues right through to the end of the first week and into the second. We’ve got a solid run of “poor surf conditions” with one zero score after another. The wind is mostly cross-on or onshore, and the swell is small—typically 2ft to 4ft on the Tuesday—with short, weak periods. There’s a slight bump in energy on the 16th, with a 4ft swell from the west and a 9-second period, but the cross-shore wind from the NW at 16 mph keeps it ugly. The combined energy reaches 241 (combined energy of all swells directed here), but it’s still a write-off for a quality wave.
The second week doesn’t get any better. We’re looking at a long, blank run of poor conditions. The 24th and 25th do see a bit more size, with 5ft to 5ft swell from the west, but it’s a short 7-second period and the wind is either strong cross-onshore or onshore. The combined energy hits 275 (combined energy of all swells directed here), but for a point break like Llantwit Major, that short-period, wind-affected swell is just not going to line up. It’s likely to be a lumpy, messy close-out. For a beginner, the 5ft+ stuff is probably too big, and the conditions are poor.
Honestly, the whole setup looks more interesting for a kite surfer than a paddle surfer. There’s barely a window of clean, rideable surf. If you’re desperate for a paddle, you’re looking at a lot of waiting and a lot of frustration. The forecast can change, but as it stands, this is a classic poor run for the area. It’s not uncommon to have a blank spell like this here.
Rusty.
Short Range ForecastLight rain (total 7mm), mostly falling on Sat night. Very mild (max 19°C on Thu morning, min 14°C on Fri night). Mainly fresh winds. | Days 4-6 Weather SummaryLight rain (total 2mm), mostly falling on Mon night. Warm (max 21°C on Mon afternoon, min 14°C on Tue night). Winds increasing (calm on Mon night, fresh winds from the WNW by Tue afternoon). | ||||||||||||||||||||
Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | |||||||||||||||
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 8 | WSW 6 | W 9 | W 10 | W 9 | W 8 | W 8 | W 6 | W 7 | W 7 | W 10 | W 9 | W 9 | W 9 | W 8 | W 7 | W 6 | W 7 | W 9 | W 10 | W 6 |
Wave Graph  | |||||||||||||||||||||
 kJ | 18 | 53 | 256 | 148 | 103 | 51 | 48 | 76 | 147 | 102 | 149 | 87 | 59 | 57 | 49 | 66 | 120 | 113 | 241 | 231 | 35 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | cross-on | cross-on | cross-on | on | on | on | cross-on | cross | cross-on | cross-on | on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross | cross |
High Tide | 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 | 10:25AM8.68m | 10:43PM8.32m | ||||||||
Low Tide | 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 | 4:06AM1.21m | 4:22PM1.42m | ||||||||
 |  |  | |  |  |  | | | | | | | | | | | | | | | |
 | 6:39 | — | — | 6:41 | — | — | 6:43 | — | — | 6:43 | — | — | 6:46 | — | — | 6:47 | — | — | 6:48 | — | — |
 | — | 7:40 | — | — | 7:38 | — | — | 7:36 | — | — | 7:34 | — | — | 7:31 | — | — | 7:29 | — | — | 7:27 | — |
mm | — | 2 | 1 | — | — | — | — | — | 4 | — | — | — | — | — | 2 | — | — | — | — | — | — |
Temp °C | 19 | 17 | 17 | 18 | 17 | 15 | 19 | 19 | 18 | 17 | 17 | 19 | 20 | 21 | 18 | 18 | 18 | 15 | 17 | 17 | 15 |
Feels °C | 14 | 13 | 14 | 16 | 14 | 14 | 14 | 15 | 14 | 14 | 14 | 20 | 19 | 20 | 20 | 15 | 12 | 12 | 13 | 12 | 12 |
Swell 1 Height (m) Direction Period (s) | W 8 | W 11 | W 9 | W 10 | W 9 | W 8 | W 8 | W 8 | W 7 | W 7 | — | W 9 | W 9 | W 9 | W 8 | W 11 | — | W 7 | — | — | W 6 |
| kJ | 18 | 2 | 256 | 148 | 103 | 51 | 48 | 13 | 147 | 102 | — | 87 | 59 | 57 | 49 | 9 | — | 113 | — | — | 32 |
Swell 2 Height (m) Direction Period (s) | W 12 | — | — | — | — | — | — | — | — | WSW 10 | — | — | — | — | W 12 | — | — | — | — | — | WSW 10 |
| kJ | 3 | — | — | — | — | — | — | — | — | 35 | — | — | — | — | 3 | — | — | — | — | — | 35 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | WSW 6 | — | — | — | — | — | W 6 | — | — | W 10 | — | — | — | — | W 7 | W 6 | — | W 9 | W 10 | — |
| kJ | — | 53 | — | — | — | — | — | 76 | — | — | 149 | — | — | — | — | 66 | 120 | — | 241 | 231 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 353 | 242 | 132 | 39 | 101 | 127 | 142 | 300 | 173 | 191 | 142 | 57 | 142 | 142 | 19 | 505 | 410 | 40 | 40 | 40 | 39 |
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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