Llantwit Major surf break

Llantwit Major surfForecast / Wales – South East / UK

information circle48hr Weather and Surf, issued 6 pm Monday 18 May 2026 BST
Forecast update in hr  min  s Forecast update imminent
Llantwit Major surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Llantwit Major sea temperature is
12.2° C
(Which is slightly warmer than usual)

How big are the waves at Llantwit Major today?

The current surf forecast for Llantwit Major at 2AM is: 0.8m 7s primary swell from a West direction and 0.5m 3s secondary swell from a South direction (forecast issued at 06:00pm May 18). The wind direction is predicted to be cross-onshore.

Time (BST) & DateWave HeightWave Period
Morning (19 May)2.5ft (0.8m)8s
Afternoon (19 May)4ft (1.2m)8s
Evening (19 May)5ft (1.6m)9s

Table - waves today at Llantwit Major. (Swell directed towards the surf break)


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Moderate rain (total 14mm), heaviest on Mon night. Very mild (max 19°C on Thu morning, min 11°C on Mon afternoon). Winds decreasing (strong winds from the WSW on Tue afternoon, light winds from the SSE by Wed night).

Mon
18
Tuesday
19
Wednesday
20
Thu
21
4 PM
7 PM
10 PM
1 AM
4 AM
7 AM
10 AM
1 PM
4 PM
7 PM
10 PM
1 AM
4 AM
7 AM
10 AM
1 PM
4 PM
7 PM
10 PM
1 AM
4 AM
7 AM
10 AM
1 PM
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
0
0
Swell
Height Map
Height Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Wave
Height (m)
Direction
Period (s)
1.2
W
7
0.9
W
7
0.8
W
7
0.8
W
7
0.8
WSW
7
0.9
WSW
8
0.8
WSW
8
1.1
WSW
8
1.3
WSW
8
1.6
WSW
9
1.6
WSW
9
1.6
WSW
9
1.8
WSW
10
1.9
WSW
14
1.9
W
13
1.8
W
13
1.7
W
13
1.5
W
13
1.3
W
13
1.2
W
12
1
W
12
1
W
12
0.9
WSW
11
0.9
WSW
11
Wave Graph
Metric surfscale
Energy kJ
138
74
56
57
67
87
90
160
221
349
374
442
640
1449
1245
1138
987
764
547
418
284
279
217
194
Wind (km/h)
25
SSW
25
S
25
SSE
30
S
30
S
25
SW
25
SSW
35
WSW
35
WSW
40
WSW
40
SW
40
WSW
35
WSW
30
WSW
30
WSW
35
WSW
30
WSW
20
WSW
10
WSW
10
SW
10
S
5
SSE
5
S
10
SSE
cross-on
cross-on
cross-on
cross-on
cross-on
on
on
on
on
on
on
on
on
cross-on
cross-on
cross-on
cross-on
cross-on
on
on
cross-on
cross
cross-on
cross-on
High Tide
8:44PM10.08m
9:09AM9.83m
9:31PM9.82m
9:58AM9.37m
10:21PM9.36m
10:49AM8.76m
Low Tide
2:23PM0.35m
2:49AM0.31m
3:10PM0.61m
3:38AM0.62m
3:59PM1.02m
4:32AM1.09m
cloud
light rain
light rain
light rain
light rain
cloud
cloud
rain showers
part cloud
clear
cloud
rain showers
rain showers
light rain
rain showers
cloud
part cloud
part cloud
clear
part cloud
part cloud
part cloud
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:16
5:16
5:15
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
9:01
9:04
9:05
9:06
1
4
2
2
1
1
1
1
1
Temp °C
11
11
11
11
13
13
14
15
14
13
12
12
12
12
13
14
15
14
14
13
13
13
15
19
6
6
7
5
8
9
9
9
7
6
4
5
6
6
7
8
10
10
13
11
11
12
14
18
Swell 1
Height (m)
Direction
Period (s)
1.2
W
7
0.9
W
7
0.8
W
7
0.8
W
7
0.8
WSW
7
0.9
WSW
8
0.8
WSW
8
0.1
W
15
1.9
WSW
14
1.3
W
13
1.2
W
12
1
W
12
1
W
12
0.9
WSW
11
0.9
WSW
11
Energy kJ
138
74
56
57
67
87
90
4
1449
547
418
284
279
217
194
Swell 2
Height (m)
Direction
Period (s)
0.3
W
10
0.3
W
10
Energy kJ
18
18
Swell 3
Height (m)
Direction
Period (s)
Energy kJ
Wind waves
Height (m)
Direction
Period (s)
0.4
SSW
3
0.4
SSW
3
0.4
S
3
0.5
S
3
0.6
S
4
0.3
SSE
3
0.5
SSW
3
1.1
WSW
8
1.3
WSW
8
1.6
WSW
9
1.6
WSW
9
1.6
WSW
9
1.8
WSW
10
1.5
W
14
1.9
W
13
1.8
W
13
1.7
W
13
1.5
W
13
Energy kJ
4
3
3
5
9
2
6
160
221
349
374
442
640
899
1245
1138
987
764
Nearest Offshore or Glassy
Rating
(10 max)
1
1
1
2
1
1
1
1
1
2
1
1
5
5
5
1
4
4
1
2
2
2
2
2
Distance (km)
74
218
237
465
470
470
488
475
321
381
381
395
401
300
300
459
191
142
21
74
28
21
21
21
Best forecast wave conditions in Wales - South East
Rating
(10 max)
2
2
2
Best forecast wave conditions in United Kingdom
Rating
(10 max)
1
2
2
2
2
1
2
2
2
2
1
1
2
2
4
4
4
3
3
3
3
2
Header Global
Rating
(10 max)
5
5
4
4
4
4
4
4
5
4
5
5
5
4
5
5
4
5
5
4
4
5
5
4
  • 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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