Trefor surfForecast / Wales – Lleyn / UK

information circle48hr Weather and Surf, issued 6 pm Tuesday 12 May 2026 BST
Forecast update in hr  min  s Forecast update imminent
Trefor surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Trefor sea temperature is
12.2° C
(Which is 1.9°C warmer than normal for this time of year)

How big are the waves at Trefor today?

The current surf forecast for Trefor at 9PM is: 0.6m 4s primary swell from a West-northwest direction and 0.1m 8s secondary swell from a Southwest direction (forecast issued at 06:00pm May 12). The wind direction is predicted to be cross-onshore.

Time (BST) & DateWave HeightWave Period
Morning (12 May)--
Afternoon (12 May)2ft (0.6m)4s
Evening (12 May)2ft (0.6m)4s

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


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Moderate rain (total 12mm), heaviest on Tue night. Very mild (max 12°C on Tue afternoon, min 8°C on Tue night). Winds decreasing (strong winds from the WNW on Tue night, light winds from the N by Thu night).

Tue
12
Wednesday
13
Thursday
14
Fri
15
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
0
0
0
0
Swell
Height Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Wave
Height (m)
Direction
Period (s)
0.6
WNW
4
0.6
WNW
4
0.7
WNW
4
1.3
W
5
1.7
WNW
6
1.9
WNW
6
2
WNW
7
1.7
NW
7
1.3
NW
6
1.3
NW
5
1.3
NW
6
1.6
NW
6
1.8
NW
7
1.3
NW
7
1.3
NW
6
1.3
NW
6
1.1
NW
5
0.9
NNW
6
0.7
NW
6
0.1
SW
14
1
NW
6
0.9
NW
6
0.9
NW
6
0.8
NW
6
Wave Graph
Metric surfscale
Energy kJ
15
16
13
81
194
300
346
248
111
96
115
220
275
159
132
111
66
63
35
8
80
54
49
38
Wind (km/h)
20
WNW
20
WNW
30
W
40
W
45
WNW
45
WNW
45
NW
40
NW
30
NNW
25
NNW
35
NNW
40
NNW
35
NNW
35
NNW
35
NNW
30
NNW
25
NNW
25
NNE
15
NNE
15
N
25
NNW
25
NNW
25
N
25
NNW
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
on
on
on
on
on
on
on
on
on
on
cross-on
cross-on
on
on
on
on
on
High Tide
6:13PM2.80m
6:22AM3.19m
6:58PM3.11m
7:09AM3.47m
7:40PM3.42m
7:54AM3.73m
Low Tide
00:51AM0.99m
1:26PM0.54m
1:44AM0.74m
2:14PM0.30m
2:34AM0.48m
clear
clear
clear
part cloud
light rain
light rain
light rain
rain showers
clear
part cloud
rain showers
rain showers
rain showers
light rain
light rain
light rain
light rain
clear
part cloud
cloud
part cloud
part cloud
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:22
5:22
5:20
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
9:02
9:05
9:07
9:07
1
2
1
1
1
1
1
1
1
1
1
Temp °C
12
12
11
9
9
8
8
10
10
10
8
8
8
8
9
9
10
10
8
9
8
8
9
10
7
7
4
1
-1
-2
-2
1
2
4
0
-1
-1
0
1
2
4
4
4
5
2
1
2
3
Swell 1
Height (m)
Direction
Period (s)
0.4
NW
5
0.1
SW
8
0.1
SW
8
0.1
SW
8
0.1
W
17
0.7
WSW
7
0.7
WSW
7
0.4
SW
7
0.3
SW
7
0.1
SW
7
0.1
W
16
0.1
W
16
0.1
SW
15
0.1
SW
15
0.1
SW
14
0.1
SW
14
0.1
SW
5
0.1
SW
14
0.1
W
14
0.1
W
14
0.1
W
14
0.1
W
14
Energy kJ
6
3
3
3
5
42
43
12
7
2
5
5
9
8
8
8
1
8
4
4
4
4
Swell 2
Height (m)
Direction
Period (s)
0.1
SW
8
0.1
W
16
0.1
W
16
0.1
W
16
0.1
W
16
0.1
W
16
0.1
SW
14
0.1
SW
14
0.1
SW
14
0.1
SW
14
0.1
W
7
0.1
W
6
Energy kJ
3
5
5
5
5
5
8
8
8
8
1
1
Swell 3
Height (m)
Direction
Period (s)
0.1
W
18
Energy kJ
6
Wind waves
Height (m)
Direction
Period (s)
0.6
WNW
4
0.6
WNW
4
0.7
WNW
4
1.3
W
5
1.7
WNW
6
1.9
WNW
6
2
WNW
7
1.7
NW
7
1.3
NW
6
1.3
NW
5
1.3
NW
6
1.6
NW
6
1.8
NW
7
1.3
NW
7
1.3
NW
6
1.3
NW
6
1.1
NW
5
0.9
NNW
6
0.7
NW
6
1.1
NW
6
1
NW
6
0.9
NW
6
0.9
NW
6
0.8
NW
6
Energy kJ
15
16
13
81
194
300
346
248
111
96
115
220
275
159
132
111
66
63
35
88
80
54
49
38
Nearest Offshore or Glassy
Rating
(10 max)
1
1
1
1
1
1
1
1
1
2
2
2
1
2
1
1
1
1
1
1
1
1
1
1
Distance (km)
298
314
406
296
296
287
298
301
615
898
893
893
593
593
313
313
328
328
323
298
50
155
62
323
Best forecast wave conditions in Lleyn Peninsula
Rating
(10 max)
Best forecast wave conditions in United Kingdom
Rating
(10 max)
1
1
1
3
4
4
4
1
2
4
1
1
1
1
1
1
1
1
Header Global
Rating
(10 max)
9
8
9
9
9
9
9
8
8
8
7
9
9
9
9
5
5
5
5
5
5
5
5
5
  • 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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