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Surf Forecasts:

Trearddur Bay (Holy Island) surfForecast / Wales – Anglesy / UK

information circle48hr Weather and Surf, issued 11 pm Monday 19 Jan 2026 GMT
Forecast update in hr  min  s Forecast update imminent
Trearddur Bay (Holy Island) surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Trearddur Bay (Holy Island) sea temperature is
8.5° C
 (Which is normal for this time of year)

How big are the waves at Trearddur Bay (Holy Island) today?

The current surf forecast for Trearddur Bay (Holy Island) at 5AM is: 1.1m 5s primary swell from a South direction and 0.1m 17s secondary swell from a Southwest direction, 0.1m 17s secondary swell from a Southwest direction (forecast issued at 11:00pm January 19). The wind direction is predicted to be cross-shore.

Time (GMT) & DateWave HeightWave Period
Morning (20 Jan)5ft (1.5m)6s
Afternoon (20 Jan)8ft (2.4m)8s
Evening (20 Jan)5ft (1.6m)8s

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

Updates in  hr  min  s Forecast update imminent 
12 DaysHourly
Print Table
Tuesday
20
Wednesday
21
Thursday
22
9 PM0 AM3 AM6 AM9 AM12 PM3 PM6 PM9 PM0 AM3 AM6 AM9 AM12 PM3 PM6 PM9 PM0 AM3 AM6 AM9 AM12 PM3 PM6 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
2
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
1.6
SSW
1.5
SSW
1.1
SSW
1.1
S
1.5
S
2.3
S
2.4
S
1.5
SSW
1.6
S
1.9
SSW
2.2
SSW
1.8
SW
1.7
SSW
1.3
SSW
1
SSW
1.1
SSW
1.5
S
1.3
SSW
1.2
S
1.1
SSW
0.6
SW
1.1
SSW
1.1
S
1.1
S
Period(s) (?)666567888778888888881710109
Wave
Graph
(?)Metric surfscale
Energy kJ (?)2001618062141474743277300336516440302207133163298240200180217210226203
Wind
(km/h)
35
SSE
30
S
25
SSE
25
SE
40
SE
55
SE
45
SSE
20
SSE
30
SSE
50
S
40
SSE
25
SE
30
ESE
40
E
35
ESE
40
SE
40
ESE
30
SE
30
SE
25
SE
25
ESE
30
SE
25
SE
10
E
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
crosscross-
on		crosscrosscrosscrosscrosscross-
on		crosscross-
on		cross-
on		crosscross-
off		cross-
off		cross-
off		crosscross-
off		crosscrosscrosscross-
off		cross-
off		crosscross-
off
High Tide
/ height (m)
11:04PM
5.20
11:16AM
5.62
11:38PM
5.24
11:49AM
5.65
12:12AM
5.25
12:24PM
5.64
Low Tide
/ height (m)
5:02AM
1.22
5:25PM
1.02
5:36AM
1.15
6:00PM
0.94
6:11AM
1.13
Tuesday
20
Wednesday
21
Thursday
22
Sunrise----8:19-------8:18-------8:18---
Sunset------4:37-------4:39-------4:42-
cloud
part cloud
clear
part cloud
cloud
cloud
light rain
light rain
light rain
part cloud
part cloud
cloud
cloud
cloud
light rain
light rain
light rain
cloud
cloud
part cloud
part cloud
cloud
light rain
light rain
Rain (mm)
------353-----231-----11
Temp. °C887789976876671010101010991098
Feels °C (?)0111-2-302-2-2-2-1-2-22113433445
  • 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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FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Trearddur Bay (Holy Island) surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.

View detailed surf forecast for Trearddur Bay (Holy Island) at:
surf-forecast.com

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