Snow-ForecastSnow-ForecastMountain-ForecastMountain-ForecastTide-ForecastTide-ForecastWeather-ForecastWeather-Forecast
Search by country, region, or break
Search by country, region, or break

Quick Links

Surf Forecasts:

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

information circle12 Day Weather and Surf, issued 11 am Friday 13 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 slightly warmer than usual)

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 Tuesday (Feb 17) at 9AM. The primary swell is predicted to be 0.6m and 8s period. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Trearddur Bay (Holy Island) in the next 12 days are 3.0m 7s and forecast to arrive on Sunday (Feb 15) at 12AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.7m 6s period and expected on Tuesday (Feb 17) at 12AM.

Wave TypeTime (GMT) & Date Wave Height & Period
Next good surf (1 star+) 9AM (Tue 17th Feb)2ft (0.6m) 8s
Best Surf12AM (Fri 20th Feb)5ft (1.6m) 12s
Most Powerful12AM (Sun 15th Feb)10ft (3.0m) 7s

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 16mm), heaviest on Sat night. Mild temperatures (max 9°C on Sat night, min 3°C on Fri morning). Winds increasing (light winds from the WNW on Sat morning, gales from the S by Sat night).

Days 3-6 Weather Summary Moderate rain (total 12mm), heaviest on Wed morning. Very mild (max 10°C on Wed afternoon, min 3°C on Tue night). Winds increasing (light winds from the ESE on Tue morning, near gales from the SW by Wed night).

Friday
13
Saturday
14
Sunday
15
Monday
16
Tuesday
17
Wednesday
18
Thursday
19
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
0
0
0
0
3
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
0.7
SW
0.7
SW
0.4
SW
0.4
SW
0.6
SW
3
S
1.6
SW
1.3
SW
2.3
WSW
2.2
WNW
1.8
WNW
0.9
SW
0.6
SW
0.6
SW
0.5
SW
0.6
SW
1.1
SW
0.8
SW
1.6
S
1.3
SSW
1.6
SW
Period(s) (?)1310109978867698881513117812
Wave
Graph
(?)Metric surfscale
Energy kJ (?)163942322501070324205402444223123585428174380142220218710
Wind
(km/h)
50
NE
40
NE
25
NNE
10
WNW
30
SSW
70
S
25
SW
35
WSW
45
W
40
WSW
40
NW
40
N
15
NE
20
SSE
50
ESE
45
SSE
40
SSE
50
WSW
60
SW
40
WNW
15
NE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
offoffcross-
off		cross-
on		cross-
on		cross-
on		oncross-
on		cross-
on		oncross-
off		cross-
off		offcrosscross-
off		cross-
on		cross-
on		ononcross-
on		off
High Tide
/ height (m)
8:19PM
4.44
8:33AM
4.79
9:02PM
4.71
9:12AM
5.09
9:37PM
4.95
9:47AM
5.36
10:10PM
5.15
10:19AM
5.57
10:41PM
5.31
10:52AM
5.73
11:14PM
5.42
11:25AM
5.82
11:47PM
5.47
Low Tide
/ height (m)
1:59PM
2.13
2:18AM
2.05
2:45PM
1.78
2:59AM
1.74
3:22PM
1.44
3:34AM
1.43
3:55PM
1.13
4:06AM
1.16
4:28PM
0.87
4:39AM
0.94
5:01PM
0.68
5:13AM
0.80
5:35PM
0.58
Friday
13
Saturday
14
Sunday
15
Monday
16
Tuesday
17
Wednesday
18
Thursday
19
Sunrise7:41--7:39--7:37--7:35--7:33--7:31--7:28--
Sunset-5:23--5:25--5:28--5:30--5:31--5:34--5:36-
light rain
part cloud
clear
part cloud
cloud
mod rain
rain showers
light rain
thunderstorm
cloud
rain showers
clear
cloud
cloud
light rain
light rain
light rain
light rain
light rain
light rain
light rain
Rain (mm)
2----9122-1---4313134
Temp. °C4555598877865569109788
Feels °C (?)-7-5-11-3220-3-3-1-60-1-3021-6-14
  • 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

Latest Updates

Save Up to 20% on SIXT Rental Cars Worldwide – Exclusive Surf-Forecast Deal
travel
Surf Forecast

Save Up to 20% on SIXT Rental Cars Worldwide – Exclusive Surf-Forecast Deal

Surf road trips just got even better. Surf-Forecast users can now save up to 20% on SIXT rental cars worldwide during the promotional period until March 31, 2026. Whether you’re planning a legendary California road trip, chasing waves along Europe’s coasts, or exploring remote surf destinations, this exclusive SIXT offer helps you travel smarter and cheaper. And if you want some inspiration on where to go, check out our article Five Iconic Surf Road Trips. Click and get your SIXT discount

The World’s Most Inconsistent Waves
Ben Mondy

The World’s Most Inconsistent Waves

Huntington, Dribbleton, Virginia, Holland and the Superbank! We recently had a look at the world’s most consistent waves. This was based on the combination of swells and wind directed at 7,000 surf spots, as compiled from our data since 2006. Those stats, represented in easy-to-read graphics, are located under each wave’s spot guides, with historical swell and wind breakdowns available by month, season, and year. There is also an offshore filter, which shows how often the swells come with clean

Read more

Read more

Discover more articles and updates in the Greenroom.

submit an eyeball surf report

Quick surf report for Trearddur Bay (Holy Island):

join our community of surf reporters

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

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.

Nearest locationNearest
Nearest locationNearest
Nearest locationNearest