Trefor Surf Break

Trefor Surf Forecast and Surf Report

Lat Long: 53.00° N 4.42° W

Issued: 6 pm 09 Jun 2026 (local time)

Forecast update in  hr  min

Today's Trefor sea temperature is
14.5° C

2.2°C warmer than normal for this time of year

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


Trefor surf forecast from 9 Jun 2026:

  • Best quality surf: Friday 12 Jun, 7PM (local time) - 3.5ft (1.1m), 6s period, SW swell with cross-offshore winds.
  • Most powerful swell: Thursday 11 Jun, 10AM (local time) - 6ft (1.8m), 6s period, SW swell with 256 kJ wave energy.
  • Next surfable swell (1★+): Friday 12 Jun, 7PM (local time) - 3.5ft (1.1m), 6s period with SW swell.

Best Forecast Surf Conditions for Trefor this week:

The surf forecast for Trefor over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Jun 12) at 7PM. The primary swell is predicted to be 1.1m and 6s period. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Trefor in the next 16 days are 1.8m 6s and forecast to arrive on Thursday (Jun 11) at 10AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 5s period and expected on Thursday (Jun 11) at 7AM.

Wave TypeTime (BST) & Date Wave Height & Period
Next good surf (1 star+) 7PM (Fri 12th Jun)3.5ft (1.1m) 6s
Best Surf 7PM (Fri 12th Jun)3.5ft (1.1m) 6s
Most Powerful10AM (Thu 11th Jun)6ft (1.8m) 6s

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


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Heavy rain (total 28mm), heaviest during Thu morning. Very mild (max 15°C on Thu night, min 10°C on Tue night). Mainly fresh winds.

Days 5-7 Weather Summary

Mostly dry. Warm (max 22°C on Mon morning, min 12°C on Fri night). Wind will be generally light.

Tue
9
Wednesday
10
Thursday
11
Friday
12
Saturday
13
Sunday
14
Monday
15
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
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
Height Map
Wave
Height (m)
Direction
Period (s)
1.5
WSW
6
0.9
SW
6
0.9
WSW
4
0.9
WSW
4
0.8
WSW
4
1.8
SW
6
1.4
SW
7
1.3
WSW
7
1.3
WSW
7
1.2
SW
7
0.8
SW
6
0.5
SW
6
0.4
SW
5
0.3
SW
5
0.1
W
15
0.1
SW
4
0.1
SW
7
0.1
W
13
0.1
W
13
0.1
SW
13
0.1
W
12
Wave Graph
Metric surfscale
Energy kJ
0
70
36
0
0
256
211
169
150
127
45
16
10
3
5
1
2
3
3
7
3
Wind (km/h)
30
WSW
20
WNW
20
W
25
SW
15
WSW
30
SSW
25
WSW
20
WSW
20
WSW
20
WSW
15
WNW
5
SSW
10
SW
10
SSE
10
S
10
SSW
10
SSE
20
SSE
25
S
15
SSE
15
S
Wind State
cross
cross-on
cross
cross-off
cross
cross-off
cross
cross
cross
cross
cross-on
glassy
cross-off
off
off
cross-off
off
off
off
off
cross-off
High Tide
4:09PM2.68m
4:27AM3.04m
5:15PM2.85m
5:32AM3.18m
6:14PM3.08m
6:31AM3.36m
7:06PM3.34m
7:26AM3.56m
7:55PM3.59m
8:19AM3.72m
8:44PM3.80m
9:09AM3.80m
9:32PM3.96m
9:59AM3.79m
Low Tide
10:54PM1.14m
11:39AM0.78m
00:01AM1.04m
12:41PM0.66m
1:07AM0.86m
1:41PM0.51m
2:08AM0.62m
2:38PM0.37m
3:04AM0.36m
3:31PM0.26m
3:58AM0.13m
4:21PM0.18m
4:50AM-0.03m
rain showers
light rain
rain showers
rain showers
light rain
heavy rain
light rain
cloud
part cloud
part cloud
clear
part cloud
part cloud
part cloud
clear
part cloud
part cloud
part cloud
clear
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:52
4:52
4:52
4:50
4:50
4:50
4:50
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
9:39
9:40
9:42
9:43
9:43
9:44
9:45
9:45
 mm
3
4
1
1
3
15
1
Temp °C
13
11
12
13
13
14
14
15
15
17
16
15
16
16
20
21
20
22
23
20
16
Feels °C
7
7
7
7
11
10
11
12
13
15
15
13
15
16
20
21
20
19
21
19
14
Swell 1
Height (m)
Direction
Period (s)
0.9
SW
6
0.8
SW
6
0.5
SW
6
0.4
SW
5
0.3
SW
5
0.2
WSW
4
0.1
SW
4
0.1
SW
7
0.1
W
13
0.1
W
13
0.1
SW
13
0.1
W
12
Energy kJ
70
45
16
10
3
2
1
2
3
3
7
3
Swell 2
Height (m)
Direction
Period (s)
0.1
W
11
0.3
NW
4
0.2
NNW
4
0.1
W
11
0.1
W
10
0.1
W
10
0.1
W
9
Energy kJ
2
3
2
2
2
2
2
Swell 3
Height (m)
Direction
Period (s)
0.1
W
14
0.1
W
14
0.1
W
15
Energy kJ
4
4
5
Wind waves
Height (m)
Direction
Period (s)
1.5
WSW
6
0.7
WNW
4
0.9
WSW
4
0.9
WSW
4
0.8
WSW
4
1.8
SW
6
1.4
SW
7
1.3
WSW
7
1.3
WSW
7
1.2
SW
7
0.6
WNW
4
0.7
SSW
4
0.9
SSW
5
0.8
SSW
5
0.5
SW
5
Energy kJ
139
16
36
26
25
256
211
169
150
127
12
17
38
32
10
Nearest Offshore or Glassy
Rating
(10 max)
2
1
2
2
1
1
2
2
2
2
1
2
2
1
1
1
1
1
1
1
1
Distance (km)
593
285
325
481
280
280
318
382
20
382
20
149
294
136
154
153
157
314
252
157
318
Best forecast wave conditions in Lleyn Peninsula
Rating
(10 max)
2
1
Best forecast wave conditions in United Kingdom
Rating
(10 max)
2
2
2
2
2
2
2
3
2
2
1
1
1
1
1
1
1
Header Global
Rating
(10 max)
5
5
7
8
6
6
5
5
7
6
5
4
5
5
5
4
5
5
4
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)
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Information about the Trefor Surf forecast

The above surf forecast table for Trefor provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Trefor can be found by selecting the local surf guide option on the grey menu. Our Trefor 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 (Trefor) 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 Trefor 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.

Are you planning a holiday in Lleyn Peninsula? If you are looking for accommodation near Trefor, camping, hotels and holiday cottages in Lleyn Peninsula, consider staying in Porthmadog which is 21 km (13 miles) away. Other places in and around Lleyn Peninsula where you can find information about places to rent, and car hire include Anglesey which is 29 km (18 miles) away, Bangor, Holyhead and Llandudno.

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