Llantwit Major Surf Break

Lat Long: 51.39° N 3.50° W

Llantwit Major Surf Forecast and Surf Report

Issued: 12 pm 15 Aug 2026 (local time)

Forecast update in  hr  min

Today's Llantwit Major sea temperature is
21.0° C
4.6° 

Llantwit Major surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Llantwit Major surf forecast from 15 Aug 2026:

  • Most powerful swell: Tuesday 18 Aug, 1PM (local time) - 3.5ft (1.0m), 6s period, W swell with 81 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 1.0m 6s and forecast to arrive on Tuesday (Aug 18) at 1PM. Winds are predicted to be cross-onshore at the time the swell arrives.

Wave TypeTime (BST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 1PM (Tue 18th Aug)3.5ft (1.0m) 6s

Table - best surf conditions forecast for Llantwit Major over the next 16 days.


The Lowdown

Alright, let’s get this out there. The next couple of weeks are looking pretty grim for any real surf. We’ve got a long stretch of tiny, weak, and messy waves on the horizon. It’s not going to be a time for heroics; it’s about managing expectations and maybe getting the cobwebs off the log, even then, it’s a grind.

First up, Llantwit Major is pretty much all we’ve got to look at, and honestly, it’s not saying much. The water is a balmy 70° with an anomaly of 8°, which is way warmer than it should be for this time of year – proper unusual, that is. But that’s where the good news ends.

We kick off the window on Saturday, August 15th. Morning has a touch of swell, 1ft from the W with a period of 8 seconds, but the energy is super weak, reading only 23. It’s glassy though, which is a plus, but the waves themselves are just poor. The afternoon stays poor, a cross-on breeze kicks up and it gets choppy.

Sunday the 16th is even smaller, 1ft. The morning is glassy again, but there’s nothing behind it. The afternoon goes onshore and bumpy. This is about as small as it gets.

Monday the 17th and Tuesday the 18th see a little more push, up to 3ft and 3ft respectively, but the period is junk, and it’s all wind-blown and lumpy. The energy readings get into the 70s, which is moderate, but it’s messy, onshore energy. Not worth getting excited about. For a point break, this cross-onshore wind is just going to make it a mess.

The rest of that first week, from Wednesday the 19th through Friday the 21st, is more of the same: weak, short-period swell, cross-onshore winds, and poor surf. We see energy values dropping back into the 20s, 30s, and 40s.

Now, here’s where we have a gap. From the 22nd to the 26th, the waves just die. We’re talking 0.3ft to 1ft. The wind does turn offshore on the 22nd and 23rd, cleaning things up, but there’s nothing to ride. It’s a flat spell, plain and simple. The energy readings are in the single digits, it’s that weak. This is a good stretch to do anything else but surf.

The tail end of the window, from the 27th to the 30th, is just a tease. A bit of swell tries to fill in, 1ft again, but the wind is all over the place, mostly cross-onshore and choppy. There’s no push, no power, just dribble.

Honestly, the only standouts here are the days with the clean, glassy conditions, like the mornings of the 22nd and 23rd, but you’d be surfing ankle-biters. With waves this small and weak, this is a period for the lake, not the ocean. If the wind stays strong and the surf poor, you might see more kite surfers out than surfers. It's a blank run, that's for sure, but it won't stay like this forever.

Rusty

Short Range Forecast

Mostly dry. Warm (max 22°C on Sat afternoon, min 14°C on Sat night). Wind will be generally light.

Days 4-6 Weather Summary

Mostly dry. Warm (max 21°C on Tue morning, min 14°C on Tue night). Winds decreasing (fresh winds from the W on Tue afternoon, calm by Thu night).

Saturday
15
Sunday
16
Monday
17
Tuesday
18
Wednesday
19
Thursday
20
Friday
21
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.4
W
8
0.4
WSW
8
0.6
W
7
0.3
W
7
0.3
W
7
0.2
W
7
0.4
W
5
0.8
W
5
0.3
W
7
0.9
W
7
1
W
6
0.6
W
6
0.6
W
6
0.8
W
4
0.6
W
5
0.9
W
6
0.8
W
6
0.7
W
6
0.7
W
6
0.6
W
6
0.5
W
5
Wave Graph
Metric surfscale
Energy kJ
20
20
40
10
9
4
8
34
10
69
76
23
27
18
18
63
48
35
36
24
12
Wind (km/h)
5
NNE
20
WSW
5
E
5
SW
25
W
15
WNW
15
W
30
W
20
WSW
20
W
30
W
20
W
20
W
30
W
20
WSW
20
W
25
W
10
NW
10
NW
25
WNW
10
NW
Wind State
glassy
cross-on
cross-off
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-on
cross
cross
cross
cross-off
High Tide
9:28PM10.12m
9:48AM9.61m
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
Low Tide
3:18PM0.29m
3:41AM0.30m
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
part cloud
clear
part cloud
part cloud
cloud
part cloud
part cloud
clear
part cloud
part cloud
cloud
part cloud
part cloud
clear
part cloud
part cloud
clear
part cloud
light rain
rain showers
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:58
6:00
6:01
6:03
6:05
6:05
6:07
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:37
8:35
8:32
8:30
8:29
8:27
8:24
 mm
1
2
2
Temp °C
21
22
18
19
19
17
19
19
18
21
19
18
18
18
16
18
18
15
17
17
15
Feels °C
20
18
16
16
14
14
18
15
16
18
14
14
13
12
12
14
13
12
13
13
12
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder
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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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