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Surf Forecasts:

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

information circle12 Day Weather and Surf, issued 11 am Sunday 01 Feb 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
8.3° C
 (Which is normal for this time of year)

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

The surf forecast for Trearddur Bay (Holy Island) over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Feb 01) at 6PM. The primary swell is predicted to be 0.6m and 8s period with a secondary swell of 0.4m and 12s. Another secondary swell of 0.6m and 4s is also forecast. 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 12 days are 1.6m 12s and forecast to arrive on Saturday (Feb 07) at 6AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.2m 6s period and expected on Thursday (Feb 05) at 12PM.

Wave TypeTime (GMT) & Date Wave Height & Period
Next good surf (1 star+) 6PM (Sun 1st Feb)1.5ft (0.4m) 12s
Best Surf 6PM (Sun 1st Feb)1.5ft (0.4m) 12s
Most Powerful 6AM (Sat 7th Feb)5ft (1.6m) 12s

Table - best surf conditions forecast for Trearddur Bay (Holy Island) over the next 12 days.

Updates in  hr  min  s Forecast update imminent 
12 DaysHourly
Print Table

Short Range Forecast Moderate rain (total 10mm), heaviest on Tue morning. Mild temperatures (max 8°C on Sun morning, min 5°C on Tue morning). Winds increasing (light winds from the WNW on Sun night, strong winds from the E by Mon night).

Days 3-6 Weather Summary Light rain (total 5mm), mostly falling on Wed morning. Very mild (max 10°C on Wed afternoon, min 3°C on Thu night). Winds increasing (light winds from the ESE on Wed afternoon, strong winds from the E by Thu afternoon).

Sunday
01
Monday
02
Tuesday
03
Wednesday
04
Thursday
05
Friday
06
Saturday
07
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
0
0
1
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 (?)
0.9
SW
0.7
SW
0.4
SW
0.5
SW
0.4
SSW
0.4
SW
0.5
SSW
0.5
SW
0.5
SW
1.3
SSW
1.2
SSW
0.7
SW
0.4
SSW
0.3
SW
0.4
SW
0.4
SW
0.7
SW
1
SW
0.9
SW
1.4
SSW
1.1
SSW
Period(s) (?)98188889161698892018171013121110
Wave
Graph
(?)Metric surfscale
Energy kJ (?)11072783325144913212525717860326810810098347236469245
Wind
(km/h)
20
WSW
20
WNW
10
ENE
25
E
35
E
40
E
40
E
35
E
25
E
35
SSE
20
SSE
20
ESE
40
E
45
E
40
ENE
30
E
35
ESE
35
SE
25
ESE
20
SE
20
SSE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
on		crossoffcross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
on		cross-
on		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		crosscross-
off		crosscross
High Tide
/ height (m)
9:49AM
5.63
10:16PM
5.51
10:32AM
5.85
10:58PM
5.59
11:13AM
5.95
11:37PM
5.57
11:52AM
5.92
12:15AM
5.46
12:29PM
5.77
12:51AM
5.28
1:05PM
5.53
1:26AM
5.07
1:40PM
5.24
2:03AM
4.84
Low Tide
/ height (m)
3:59PM
0.72
4:14AM
0.92
4:43PM
0.51
4:55AM
0.78
5:25PM
0.45
5:35AM
0.76
6:05PM
0.52
6:13AM
0.84
6:44PM
0.72
6:50AM
1.03
7:21PM
1.01
7:27AM
1.29
7:58PM
1.35
Sunday
01
Monday
02
Tuesday
03
Wednesday
04
Thursday
05
Friday
06
Saturday
07
Sunrise8:03--8:00--8:00--7:58--7:56--7:54--7:52--
Sunset-5:00--5:01--5:04--5:06--5:07--5:09--5:12-
light rain
cloud
part cloud
part cloud
cloud
rain showers
light rain
light rain
cloud
light rain
part cloud
part cloud
part cloud
cloud
rain showers
rain showers
light rain
rain showers
part cloud
light rain
rain showers
Rain (mm)
2----143-1----1111-13
Temp. °C888887557910865481010999
Feels °C (?)33510-3-4-32352-3-6-6132345
  • 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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View detailed surf forecast for Trearddur Bay (Holy Island) at:
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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 12 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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