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Surf Forecasts:

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

information circle48hr Weather and Surf, issued 5 pm Saturday 22 Nov 2025 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
12.3° C
 (Which is slightly warmer than usual)

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

The current surf forecast for Trearddur Bay (Holy Island) at 10PM is: 0.9m 7s primary swell from a South-southwest direction and 0.4m 4s secondary swell from a Northwest direction (forecast issued at 05:00pm November 22). The wind direction is predicted to be onshore.

Time (GMT) & DateWave HeightWave Period
Morning (22 Nov)--
Afternoon (22 Nov)3.5ft (1.0m)7s
Evening (22 Nov)2.5ft (0.8m)7s

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
Saturday
22
Sunday
23
Monday
24
Tuesday
25
3 PM6 PM9 PM0 AM3 AM6 AM9 AM12 PM3 PM6 PM9 PM0 AM3 AM6 AM9 AM12 PM3 PM6 PM9 PM0 AM3 AM6 AM9 AM12 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
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
1
SW
0.8
SSW
0.8
SSW
1
SSW
2.1
SSW
2.1
WSW
2.2
W
2.5
WSW
3.5
WSW
4
W
3
NW
1.8
NW
1.1
SW
0.7
SW
0.6
SW
0.4
SW
0.3
SW
0.3
SW
0.1
SW
0.1
SW
0.1
SW
0.1
SW
0.1
SW
0.1
SW
Period(s) (?)777767678876788888111312121211
Wave
Graph
(?)Metric surfscale
Energy kJ (?)93615985369394389534130817788932471126342241110566655
Wind
(km/h)
20
SW
20
W
20
SW
30
S
40
SSW
45
W
45
W
45
WSW
60
WSW
60
W
55
NW
40
NW
25
NNW
30
N
45
N
45
N
45
N
35
N
35
N
35
N
30
N
30
N
25
N
20
NNE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
oncross-
on		oncross-
on		oncross-
on		cross-
on		cross-
on		oncross-
on		crosscrosscross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off
High Tide
/ height (m)
11:29PM
5.13
11:45AM
5.37
12:05AM
5.00
12:21PM
5.26
12:44AM
4.84
Low Tide
/ height (m)
5:19PM
1.44
5:32AM
1.55
5:55PM
1.53
6:08AM
1.71
6:34PM
1.65
6:46AM
1.88
Saturday
22
Sunday
23
Monday
24
Tuesday
25
Sunrise------7:56-------7:58-------7:58-
Sunset4:13-------4:12-------4:10-------
part cloud
rain showers
part cloud
cloud
thunderstorm
light rain
light rain
cloud
cloud
light rain
rain showers
light rain
light rain
cloud
light rain
part cloud
cloud
cloud
cloud
cloud
clear
clear
rain showers
clear
Rain (mm)
-1--421--1211-1-------1-
Temp. °C10101010119999988889999898888
Feels °C (?)55543-1-1-2-4-4-4-121-1-1-21000012
  • 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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View detailed surf forecast for Trearddur Bay (Holy Island) at:
surf-forecast.com

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