Trefor surfForecast / Wales – Lleyn / UK

information circle48hr Weather and Surf, issued 12 am 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 8AM is: 0.1m 9s primary swell from a Southwest direction and 0.4m 3s secondary swell from a West-northwest direction (forecast issued at 12:00am May 12). The wind direction is predicted to be cross-onshore.

Time (BST) & DateWave HeightWave Period
Morning (12 May)2ft (0.6m)3s
Afternoon (12 May)3.5ft (1.0m)5s
Evening (12 May)2.5ft (0.7m)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 Thu morning. Very mild (max 12°C on Tue afternoon, min 7°C on Mon night). Winds increasing (calm on Mon night, strong winds from the WNW by Tue night).

Tuesday
12
Wednesday
13
Thursday
14
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
4 PM
7 PM
10 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
Wave
Height (m)
Direction
Period (s)
0.1
SW
8
0.1
SW
8
0.1
SW
9
0.7
WNW
4
1.1
NW
4
0.9
NW
5
0.7
WNW
5
0.7
W
4
1.3
W
5
1.8
WNW
6
1.9
WNW
7
2
WNW
7
1.7
WNW
6
1.4
WNW
6
1.1
NW
6
1.4
NW
6
1.6
NW
6
1.8
NW
7
1.7
NW
7
1.6
NW
6
1.3
NW
6
1
NW
6
0.9
NW
5
0.7
NW
5
Wave Graph
Metric surfscale
Energy kJ
3
3
3
14
45
33
21
13
78
224
319
331
216
123
77
124
220
267
246
188
124
62
38
29
Wind (km/h)
0
NW
5
SW
20
WNW
25
WNW
35
NW
15
W
20
W
30
WNW
35
W
40
W
45
WNW
45
NW
40
NW
35
NW
30
NNW
40
NW
40
NNW
35
NNW
30
NNW
30
NNW
30
NNW
30
NNW
20
N
15
NNE
glassy
cross-off
cross-on
cross-on
on
cross-on
cross
cross-on
cross
cross-on
cross-on
cross-on
cross-on
on
on
on
on
on
on
on
on
on
cross-on
cross-on
High Tide
5:30AM2.94m
6:13PM2.80m
6:22AM3.19m
6:58PM3.11m
7:09AM3.47m
7:40PM3.42m
Low Tide
11:49PM1.19m
12:33PM0.79m
00:51AM0.99m
1:26PM0.54m
1:44AM0.74m
2:14PM0.30m
part cloud
clear
part cloud
part cloud
clear
clear
clear
clear
part cloud
light rain
light rain
light rain
rain showers
rain showers
rain showers
clear
light rain
cloud
light rain
light rain
light rain
rain showers
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:24
5:22
5:22
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
9:02
9:05
9:07
1
1
1
1
1
1
1
1
1
2
1
Temp °C
7
8
9
9
10
11
12
11
9
9
8
9
10
10
10
9
9
9
8
9
9
10
11
8
5
5
5
3
2
6
7
4
1
0
-2
-1
1
2
3
0
0
1
1
2
3
3
6
4
Swell 1
Height (m)
Direction
Period (s)
0.1
SW
8
0.1
SW
9
0.1
SW
9
0.1
SW
8
0.1
SW
8
0.1
SW
8
0.1
SW
8
0.1
SW
8
0.1
W
17
0.1
W
17
0.5
SW
7
0.4
WSW
7
0.4
SW
7
0.4
SW
6
0.2
WSW
6
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
14
Energy kJ
3
3
3
3
3
3
3
3
6
5
22
19
11
9
4
5
5
9
8
8
8
8
Swell 2
Height (m)
Direction
Period (s)
0.1
SW
8
0.1
W
18
0.1
W
16
0.1
W
16
0.4
WSW
5
0.2
WSW
5
0.1
W
16
0.1
W
16
0.1
W
7
Energy kJ
3
7
5
5
10
2
5
5
1
Swell 3
Height (m)
Direction
Period (s)
0.1
W
18
0.1
W
16
0.1
W
16
Energy kJ
6
5
5
Wind waves
Height (m)
Direction
Period (s)
0.3
WNW
3
0.7
WNW
4
1.1
NW
4
0.9
NW
5
0.7
WNW
5
0.7
W
4
1.3
W
5
1.8
WNW
6
1.9
WNW
7
2
WNW
7
1.7
WNW
6
1.4
WNW
6
1.1
NW
6
1.4
NW
6
1.6
NW
6
1.8
NW
7
1.7
NW
7
1.6
NW
6
1.3
NW
6
1
NW
6
0.9
NW
5
0.7
NW
5
Energy kJ
1
14
45
33
21
13
78
224
319
331
216
123
77
124
220
267
246
188
124
62
38
29
Nearest Offshore or Glassy
Rating
(10 max)
1
1
1
1
1
1
1
1
1
1
1
4
1
4
2
1
1
2
2
1
1
1
1
1
Distance (km)
215
206
206
298
316
296
296
296
287
298
301
612
1332
656
627
593
313
593
593
347
345
270
298
161
Best forecast wave conditions in Lleyn Peninsula
Rating
(10 max)
Best forecast wave conditions in United Kingdom
Rating
(10 max)
2
2
2
1
1
1
3
4
4
4
1
4
4
4
2
2
3
1
1
1
1
1
Header Global
Rating
(10 max)
9
9
5
8
8
9
9
9
9
6
9
9
7
7
6
9
8
9
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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