Trearddur Bay (Holy Island) Surf Break
Lat Long: 53.28° N 4.62° W

Trearddur Bay (Holy Island) Surf Forecast and Surf Report

Weather Forecast for Trearddur Bay (Holy Island)

Issued: 6 am 03 Jun 2026 (local time)

Forecast update in  hr  min

Today's Trearddur Bay (Holy Island) sea temperature is
13.0° C

1.2°C warmer than normal for this time of year

Trearddur Bay (Holy Island) surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Trearddur Bay (Holy Island) surf forecast from 3 Jun 2026:

  • Best quality surf: Sunday 7 Jun, 10PM (local time) - 3.5ft (1.1m), 8s period, SW swell with cross-offshore winds.
  • Most powerful swell: Saturday 6 Jun, 7PM (local time) - 6ft (1.8m), 14s period, SW swell with 1,288 kJ wave energy.
  • Next surfable swell (1★+): Sunday 7 Jun, 10PM (local time) - 3.5ft (1.1m), 8s period with SW swell.

Best Forecast Surf Conditions for Trearddur Bay (Holy Island) this week:

The surf forecast for Trearddur Bay (Holy Island) over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Jun 07) at 10PM. The primary swell is predicted to be 1.1m and 8s period with a secondary swell of 0.2m and 12s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Trearddur Bay (Holy Island) in the next 16 days are 1.8m 14s and forecast to arrive on Saturday (Jun 06) at 7PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Saturday (Jun 06) at 7AM.

Wave TypeTime (BST) & Date Wave Height & Period
Next good surf (1 star+)10PM (Sun 7th Jun)3.5ft (1.1m) 8s
Best Surf10PM (Sun 7th Jun)3.5ft (1.1m) 8s
Most Powerful 7PM (Sat 6th Jun)6ft (1.8m) 14s

Table - best surf conditions forecast for Trearddur Bay (Holy Island) over the next 16 days.


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Moderate rain (total 15mm), heaviest on Wed morning. Very mild (max 13°C on Wed morning, min 10°C on Thu night). Winds decreasing (strong winds from the S on Wed morning, moderate winds from the SW by Fri morning).

Days 4-6 Weather Summary

Moderate rain (total 19mm), heaviest on Sun night. Very mild (max 14°C on Sat morning, min 11°C on Sun morning). Winds decreasing (strong winds from the SSW on Sat night, light winds from the ESE by Sun night).

Wednesday
3
Thursday
4
Friday
5
Saturday
6
Sunday
7
Monday
8
Tuesday
9
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
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
Wave
Height (m)
Direction
Period (s)
2.1
SSW
6
2.2
SW
7
2.5
SW
8
2.1
WSW
6
1.6
WSW
5
1.8
W
6
0.6
SSW
7
1
SSW
4
1
S
5
1.8
S
8
1.5
SSW
10
2.3
SW
7
2.2
SW
7
1.4
SW
8
0.9
SSW
7
1
SW
4
1.4
SW
5
1.3
SW
6
0.9
SSW
6
2
SSW
6
2.2
SW
7
Wave Graph
Metric surfscale
Energy kJ
310
487
724
280
130
200
41
38
46
397
428
481
489
295
86
31
110
132
67
274
412
Wind (km/h)
50
S
45
SSW
45
SW
40
WSW
35
W
40
W
25
SW
25
SSW
30
SSE
40
SE
25
W
40
SSW
40
WSW
25
SSW
20
SSW
30
WSW
35
SW
25
WSW
20
SSW
35
SSW
50
S
Wind State
cross-on
on
on
cross-on
cross-on
cross-on
on
cross-on
cross
cross
cross-on
cross-on
on
cross-on
on
cross-on
on
cross-on
cross-on
cross-on
cross-on
High Tide
1:01PM4.86m
1:14AM5.18m
1:40PM4.75m
1:52AM5.08m
2:21PM4.63m
2:34AM4.96m
3:06PM4.51m
3:20AM4.84m
3:57PM4.42m
4:12AM4.75m
4:55PM4.39m
5:10AM4.71m
5:58PM4.44m
Low Tide
7:02PM1.48m
7:28AM1.34m
7:39PM1.61m
8:08AM1.43m
8:19PM1.75m
8:51AM1.52m
9:05PM1.87m
9:40AM1.58m
9:58PM1.96m
10:35AM1.61m
10:57PM1.99m
11:35AM1.57m
00:01AM1.93m
light rain
light rain
rain showers
light rain
light rain
rain showers
part cloud
part cloud
light rain
cloud
rain showers
rain showers
part cloud
light rain
rain showers
part cloud
rain showers
rain showers
part cloud
cloud
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:56
4:54
4:54
4:54
4:52
4:52
4:52
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
9:37
9:37
9:38
9:39
9:40
9:42
9:43
 mm
4
3
2
1
2
1
2
1
1
2
12
1
2
2
Temp °C
13
13
13
13
13
12
11
13
13
14
14
13
12
12
12
12
14
14
13
13
14
Feels °C
4
5
4
6
6
4
5
8
7
7
8
7
6
7
9
6
8
9
7
6
5
Swell 1
Height (m)
Direction
Period (s)
0.4
NW
6
0.4
SW
14
0.5
SW
13
0.7
NW
5
0.2
WNW
4
0.3
SW
8
1.8
S
8
1.5
SSW
10
0.4
NW
5
0.4
NW
4
0.9
SSW
7
0.1
SW
12
0.1
W
12
0.4
NW
4
Energy kJ
9
66
84
23
2
9
397
428
5
5
86
6
3
4
Swell 2
Height (m)
Direction
Period (s)
0.6
SSW
7
0.2
NNW
5
0.1
SW
13
0.4
SW
15
0.1
SW
12
Energy kJ
36
3
7
78
6
Swell 3
Height (m)
Direction
Period (s)
0.3
NNW
6
0.1
SW
13
0.1
SW
13
0.2
ENE
6
Energy kJ
6
7
7
4
Wind waves
Height (m)
Direction
Period (s)
2.1
SSW
6
2.2
SW
7
2.5
SW
8
2.1
WSW
6
1.6
WSW
5
1.8
W
6
0.8
SW
5
1
SSW
4
1
S
5
1.6
SE
5
2.3
SW
7
2.2
SW
7
1.4
SW
8
0.4
NW
3
1
SW
4
1.4
SW
5
1.3
SW
6
0.9
SSW
6
2
SSW
6
2.2
SW
7
Energy kJ
310
487
724
280
130
200
41
38
46
138
481
489
295
3
31
110
132
67
274
412
Nearest Offshore or Glassy
Rating
(10 max)
2
2
3
1
1
2
2
2
2
3
3
1
2
1
2
1
1
2
1
1
1
Distance (km)
308
292
393
296
305
280
251
234
249
567
567
249
174
98
174
251
462
251
251
246
246
Best forecast wave conditions in Anglesy
Rating
(10 max)
Best forecast wave conditions in United Kingdom
Rating
(10 max)
3
3
3
2
2
2
4
4
4
3
3
1
3
3
3
2
2
3
2
3
1
Header Global
Rating
(10 max)
5
5
5
4
5
5
5
9
7
5
9
8
6
8
9
6
6
7
9
9
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 Trearddur Bay (Holy Island) Surf forecast

The above surf forecast table for Trearddur Bay (Holy Island) provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Trearddur Bay (Holy Island) can be found by selecting the local surf guide option on the grey menu. Our Trearddur Bay (Holy Island) 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 (Trearddur Bay (Holy Island)) 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 Trearddur Bay (Holy Island) 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 Anglesy? If you are looking for accommodation near Trearddur Bay (Holy Island), camping, hotels and holiday cottages in Anglesy, consider staying in Holyhead which is 4 km (2 miles) away. Other places in and around Anglesy where you can find information about places to rent, and car hire include Anglesey which is 7 km (4 miles) away, Bangor, Porthmadog and Llandudno.

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