Trearddur Bay (Holy Island) Surf Break

Lat Long: 53.28° N 4.62° W

Trearddur Bay (Holy Island) Surf Forecast and Surf Report

Issued: 6 am 23 Jul 2026 (local time)

Forecast update in  hr  min

Today's Trearddur Bay (Holy Island) sea temperature is
16.5° C
1.3° 

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 23 Jul 2026:

  • Most powerful swell: Sunday 26 Jul, 1PM (local time) - 3.5ft (1.1m), 5s period, NW swell with 57 kJ wave energy.

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

The most powerful waves expected at Trearddur Bay (Holy Island) in the next 16 days are 1.1m 5s and forecast to arrive on Sunday (Jul 26) at 1PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 6s period and expected on Thursday (Jul 23) at 1PM.

Wave TypeTime (BST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 1PM (Sun 26th Jul)3.5ft (1.1m) 5s

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


The Lowdown

Alright folks, Rusty here. Let's take a look at what's on the menu for the Holy Island region over the next couple of weeks.

Right off the bat, I gotta be straight with you – it's a tough stretch. The forecast is giving us a whole lot of nothing for the first week and a half. We're looking at a solid gap of about 10 days where the surf's going to be pretty much flat or just downright ugly. From Thursday the 23rd right through to the end of July, the energy is just not there. The swell is tiny, the wind is messy, and the combined wave energy is sitting at zero or just a handful of weak numbers. It's a frustrating time to be a surfer.

We start seeing a bit of life on Saturday the 1st of August, but it's still nothing to write home about. By Saturday afternoon, Trearddur Bay (Holy Island) might see a bump to about 4ft from the SSW, but the period is a short 5 seconds, so it's gonna be a bit lumpy. The wind is cross-shore from the NW, so it won't be completely blown out, but it's not clean. The combined energy is only 67, which is weak. It's a paddle, but not a classic.

The standout – and I'm using that word lightly – looks like Friday the 7th of August. The morning shows a bit of a pulse with 3ft from the SSW and a 5-second period, hitting a combined energy of 37. The wind is a light cross-onshore from the SSE, so it's a gentle breeze, and the surf will be fairly choppy. It's not going to be epic, but it's the most promising day in the whole window. The water temp is a touch warmer than normal for this time of year at 62°.

For the rest of the window, it's pretty much a write-off. The swell stays tiny, the wind is either onshore or cross-onshore, and the energy levels are pitiful. Honestly, if you're desperate for a paddle, you might get a few knee-high wobblers on the 7th, but don't hold your breath.

Rusty.

Short Range Forecast

Light rain (total 4mm), mostly falling on Sat morning. Very mild (max 16°C on Thu afternoon, min 13°C on Thu night). Winds increasing (light winds from the NNE on Thu night, fresh winds from the WNW by Sat night).

Days 4-6 Weather Summary

Mostly dry. Very mild (max 19°C on Tue afternoon, min 13°C on Sun night). Mainly fresh winds.

Thursday
23
Friday
24
Saturday
25
Sunday
26
Monday
27
Tuesday
28
Wednesday
29
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)
1.1
N
6
0.9
N
6
0.5
N
5
0.1
S
13
0.1
S
13
0.4
WSW
3
0.8
W
4
1
WSW
5
0.8
WSW
4
1
WNW
5
0.9
NW
5
1
NW
5
0.5
W
4
0.4
SSW
3
0.7
SW
4
0.8
SSW
4
0.4
SW
4
0.3
SW
4
0.4
SW
3
0.4
SW
3
0.7
SW
5
Wave Graph
Metric surfscale
Energy kJ
0
0
0
3
3
4
19
40
17
48
33
42
8
3
21
18
5
2
3
2
24
Wind (km/h)
25
N
20
N
15
NNE
10
W
15
SW
20
WSW
25
SW
20
WSW
20
W
30
WNW
25
WNW
30
NW
20
W
25
SSW
25
S
25
S
25
SSW
15
S
10
SSW
15
WNW
15
S
Wind State
cross-off
cross-off
off
cross-on
on
cross-on
on
on
cross-on
cross-on
cross
cross
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross
cross-on
High Tide
6:33PM4.31m
7:10AM4.28m
7:50PM4.38m
8:27AM4.33m
8:53PM4.58m
9:25AM4.48m
9:42PM4.82m
10:10AM4.66m
10:22PM5.05m
10:47AM4.83m
10:57PM5.25m
11:21AM4.96m
11:31PM5.40m
Low Tide
12:17PM2.03m
00:48AM2.22m
1:29PM2.12m
2:05AM2.17m
2:34PM2.05m
3:07AM1.98m
3:25PM1.90m
3:54AM1.74m
4:07PM1.71m
4:33AM1.50m
4:44PM1.52m
5:08AM1.29m
5:17PM1.36m
clear
clear
clear
part cloud
clear
part cloud
light rain
light rain
rain showers
cloud
part cloud
clear
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:20
5:20
5:22
5:24
5:26
5:26
5:28
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
9:28
9:27
9:25
9:23
9:22
9:21
9:19
 mm
2
1
1
Temp °C
15
16
15
14
16
16
15
16
16
16
17
16
14
16
16
17
19
18
19
19
18
Feels °C
11
12
13
13
14
13
12
14
14
11
12
10
10
11
12
13
16
15
18
17
18
  • 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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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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