Surf Break

Lat Long: 53.28° N 4.62° W

Trearddur Bay (Holy Island) 48 hour detailed Surf Forecast

Issued: 6 pm 29 Sep 2026 (local time)

Forecast update in  hr  min

Today's Trearddur Bay (Holy Island) sea temperature is
16.5°C
1.8° 

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


How big are the waves at Trearddur Bay (Holy Island) today (30 Sep):

  • Morning surf: Morning surf (30 Sep, local time) - 7ft (2.2m), 10s period with SSW swell.
  • Afternoon surf: Afternoon surf (30 Sep, local time) - 8ft (2.5m), 7s period with SSW swell.
  • Evening surf: Evening surf (30 Sep, local time) - 7ft (2.2m), 11s period with SSW swell.

The current surf forecast for Trearddur Bay (Holy Island) at 12AM is: 2.0m 8s primary swell from a South direction (forecast issued at 06:00pm September 29). An open ocean swell of 0.1m 5s is not directed at the surf break. The wind direction is predicted to be cross-shore.

Time (BST) & DateWave HeightWave Period
Morning (30 Sep)7ft (2.2m)10s
Afternoon (30 Sep)8ft (2.5m)7s
Evening (30 Sep)7ft (2.2m)11s

Table - waves today at Trearddur Bay (Holy Island). (Swell directed towards the surf break)


Short Range Forecast

Heavy rain (total 25mm), heaviest during Tue night. Warm (max 21°C on Tue afternoon, min 14°C on Wed night). Winds decreasing (strong winds from the S on Wed morning, moderate winds from the SW by Wed night).

Tue
29
Wednesday
30
Thursday
1
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
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.4
SSE
5
1.8
S
6
1.9
S
7
2.2
SSW
8
2.5
SSW
9
2.2
SSW
10
2.2
SSW
11
2.4
SSW
7
2.5
SSW
7
2.4
SSW
7
2.2
SSW
11
1.8
SW
11
1.7
SW
11
1.6
SW
10
1.4
SW
10
1.4
SW
10
1.4
SSW
10
1.6
SSW
6
1.8
SSW
6
Wave Graph
Metric surfscale
Energy kJ
111
239
348
585
1045
961
1122
529
665
611
1082
730
652
527
428
377
378
154
226
Wind (km/h)
45
SE
45
SSE
40
SSE
45
SSE
40
SSW
40
S
45
S
45
S
45
S
40
S
35
SSW
30
SSW
25
SW
25
SW
25
SW
25
SSW
30
SSW
35
SSW
40
SSW
Wind State
cross
cross
cross-on
cross
on
cross-on
cross-on
cross-on
cross-on
cross-on
on
on
on
on
on
on
cross-on
cross-on
cross-on
High Tide
00:50AM5.80m
1:11PM5.55m
1:33AM5.61m
1:53PM5.37m
Low Tide
6:39PM0.78m
7:00AM0.79m
7:21PM0.94m
7:43AM1.08m
8:08PM1.20m
cloud
part cloud
cloud
light rain
mod rain
light rain
clear
clear
clear
clear
clear
part cloud
clear
cloud
clear
clear
cloud
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
—
—
—
—
—
7:16
—
—
—
—
—
—
—
7:18
—
—
—
—
—
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
—
7:00
—
—
—
—
—
—
6:59
—
—
—
—
—
—
—
6:55
—
—
 mm
—
—
—
4
8
1
—
—
—
—
—
—
—
—
—
—
—
—
—
Temp °C
21
21
19
17
15
15
16
16
16
15
14
14
14
14
14
14
15
15
15
Feels °C
14
14
13
10
8
8
7
7
8
8
8
9
9
9
9
9
9
8
8
  • 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
How to use the Wavefinder 

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