Trefor surfForecast / Wales – Lleyn / UK

information circle48hr Weather and Surf, issued 6 am Tuesday 19 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
12.1° C
(Which is 1.3°C warmer than normal for this time of year)

How big are the waves at Trefor today?

The current surf forecast for Trefor at 11AM is: 1.7m 7s primary swell from a South-southwest direction (forecast issued at 06:00am May 19). The wind direction is predicted to be cross-offshore.

Time (BST) & DateWave HeightWave Period
Morning (19 May)5ft (1.5m)7s
Afternoon (19 May)6ft (1.8m)7s
Evening (19 May)7ft (2.1m)8s

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 11mm), heaviest on Tue morning. Very mild (max 16°C on Thu afternoon, min 11°C on Tue night). Winds decreasing (fresh winds from the SSW on Tue night, light winds from the SE by Thu night).

Tuesday
19
Wednesday
20
Thursday
21
Fri
22
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
1 AM
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
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)
1.6
SSW
7
1.5
SSW
7
1.6
SSW
7
1.7
SW
7
1.8
SW
7
2.1
SW
7
2.3
SW
8
2.2
SW
8
1.9
SW
9
1.7
WSW
9
1.5
SW
9
1.6
SW
6
1.6
SW
6
1.6
SW
6
1.5
SW
6
1.3
SW
6
1.3
SW
5
1.3
SW
6
1.3
SW
6
0.1
W
15
0.1
W
15
0.1
W
15
0.8
SW
7
0.7
SW
7
Wave Graph
Metric surfscale
Energy kJ
223
218
229
268
336
440
580
634
572
440
349
0
200
220
172
136
0
0
0
4
4
4
63
49
Wind (km/h)
30
S
30
SSW
30
S
30
SSW
35
SSW
35
SSW
35
SSW
35
SW
30
WSW
25
SW
25
SW
30
SW
30
SW
25
SSW
20
S
20
SSE
20
S
25
S
25
S
20
SSW
25
SSW
15
S
10
SE
15
SE
off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
off
off
off
cross-off
cross-off
cross-off
cross-off
off
off
High Tide
10:59AM3.82m
11:18PM3.94m
11:49AM3.56m
00:09AM3.76m
12:43PM3.24m
Low Tide
5:48AM-0.01m
6:10PM0.28m
6:41AM0.08m
7:00PM0.48m
7:37AM0.24m
7:54PM0.68m
light rain
rain showers
light rain
rain showers
light rain
cloud
light rain
light rain
clear
cloud
part cloud
clear
part cloud
part cloud
clear
part cloud
light rain
rain showers
part cloud
cloud
part cloud
cloud
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:13
5:11
5:11
5:09
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
9:14
9:15
9:17
9:19
4
2
1
2
1
1
2
2
2
Temp °C
12
12
12
12
13
12
11
11
11
11
12
12
13
12
12
12
12
13
14
14
16
15
15
16
6
7
7
6
7
6
4
4
5
6
7
6
8
8
9
9
9
9
10
11
12
12
13
14
Swell 1
Height (m)
Direction
Period (s)
0.8
SW
7
0.3
WSW
10
0.6
WSW
8
0.1
W
15
0.1
W
15
0.1
W
15
0.8
SW
7
0.7
SW
7
Energy kJ
61
20
48
4
4
4
63
49
Swell 2
Height (m)
Direction
Period (s)
0.3
WSW
10
0.1
W
15
0.1
W
15
0.1
W
15
Energy kJ
20
4
4
4
Swell 3
Height (m)
Direction
Period (s)
0.2
WSW
9
Energy kJ
8
Wind waves
Height (m)
Direction
Period (s)
1.6
SSW
7
1.5
SSW
7
1.6
SSW
7
1.7
SW
7
1.8
SW
7
2.1
SW
7
2.3
SW
8
2.2
SW
8
1.9
SW
9
1.7
WSW
9
1.5
SW
9
1.6
SW
6
1.6
SW
6
1.6
SW
6
1.5
SW
6
1.3
SW
6
1.3
SW
5
1.3
SW
6
1.3
SW
6
1.2
SW
6
1.1
SW
6
0.9
SW
6
Energy kJ
223
218
229
268
336
440
580
634
572
440
349
187
200
220
172
136
94
104
108
102
80
60
Nearest Offshore or Glassy
Rating
(10 max)
1
1
1
1
2
1
1
1
1
2
3
3
1
1
1
1
1
1
1
1
1
1
1
1
Distance (km)
303
303
342
318
288
287
283
280
285
280
295
311
270
268
64
80
80
223
223
154
160
80
93
26
Best forecast wave conditions in Lleyn Peninsula
Rating
(10 max)
Best forecast wave conditions in United Kingdom
Rating
(10 max)
2
1
1
2
2
2
3
4
1
3
2
4
4
3
3
4
3
3
3
2
3
3
3
Header Global
Rating
(10 max)
4
4
4
4
4
4
4
5
5
5
4
4
4
5
5
5
4
5
4
4
4
5
4
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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