- Forecast
- Maps
- Live
- Weather State
- Spot Information
Trearddur Bay (Holy Island) Surf Forecast
/ Wales – Anglesy (10 surf breaks) /
Trearddur Bay (Holy Island) surfForecast / Wales – Anglesy / UK
12 Day Weather and Surf, issued 12 pm Friday 04 Jul 2025 BST
Best Forecast Surf Conditions for Trearddur Bay (Holy Island) this week:
The most powerful waves expected at Trearddur Bay (Holy Island) in the next 12 days are 2.0m 7s and forecast to arrive on Friday (Jul 04) at 10PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.8m 7s period and expected on Monday (Jul 07) at 4AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 10PM (Fri 4th Jul) | 6.5ft (2.0m) 7s |
Table - best surf conditions forecast for Trearddur Bay (Holy Island) over the next 12 days.
Friday 04 | Saturday 05 | Sunday 06 | Monday 07 | Tuesday 08 | Wednesday 09 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | |||||||||||||||||||||||||
| AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Rating (10 max) | ||||||||||||||||||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  |  |  |  |  |  | ||||||||||||||||||||||||
| Wave Height (m) & direction (?) | — | — | — | — | — | |||||||||||||||||||||||||||||||
| Period(s) (?) | 4 | 6 | 7 | 6 | 6 | 7 | 5 | 6 | 6 | 6 | 4 | 6 | 4 | 3 | 3 | 3 | 4 | 4 | 3 | - | - | - | 2 | 4 | 4 | 4 | 4 | 14 | - | - | 2 | 3 | 4 | 4 | 12 | 5 |
Wave (?)Graph  | ||||||||||||||||||||||||||||||||||||
| Energy (?) | 20 | 128 | 305 | 157 | 103 | 100 | 86 | 50 | 6 | 1 | 6 | 1 | 7 | 4 | 1 | 2 | 1 | 2 | 1 | 0 | 0 | 0 | 1 | 4 | 8 | 8 | 7 | 10 | 0 | 0 | 1 | 3 | 29 | 11 | 4 | 1 |
Wind (km/h) | ||||||||||||||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | on | on | on | on | on | cross- on | cross- on | cross | cross | cross- off | cross- off | cross | cross- on | on | on | on | cross- on | on | cross- on | on | cross- on | cross- on | on | cross- on | cross- on | on | off | off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | off |
High Tide / height (m) | 6:21PM 4.28 | 6:41AM 4.37 | 7:27PM 4.34 | 7:51AM 4.37 | 8:28PM 4.48 | 8:51AM 4.46 | 9:18PM 4.68 | 9:41AM 4.60 | 10:01PM 4.90 | 10:24AM 4.75 | 10:40PM 5.10 | 11:04AM 4.88 | 11:18PM 5.27 | 11:42AM 4.98 | 11:55PM 5.39 | 12:19PM 5.05 | 12:32AM 5.47 | 12:58PM 5.09 | 1:10AM 5.51 | 1:37PM 5.09 | 1:49AM 5.50 | 2:18PM 5.06 | 2:32AM 5.45 | |||||||||||||
Low Tide / height (m) | 12:06PM 1.89 | 12:26AM 2.21 | 1:10PM 1.96 | 1:36AM 2.18 | 2:10PM 1.93 | 2:37AM 2.04 | 3:01PM 1.83 | 3:27AM 1.85 | 3:46PM 1.70 | 4:10AM 1.63 | 4:25PM 1.56 | 4:50AM 1.42 | 5:03PM 1.42 | 5:27AM 1.23 | 5:40PM 1.30 | 6:05AM 1.07 | 6:17PM 1.22 | 6:43AM 0.95 | 6:56PM 1.17 | 7:23AM 0.88 | 7:36PM 1.17 | 8:04AM 0.86 | 8:18PM 1.21 | |||||||||||||
Friday 04 | Saturday 05 | Sunday 06 | Monday 07 | Tuesday 08 | Wednesday 09 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | |||||||||||||||||||||||||
| Sunrise | 4:56 | - | - | 4:58 | - | - | 4:58 | - | - | 5:00 | - | - | 5:00 | - | - | 5:01 | - | - | 5:03 | - | - | 5:03 | - | - | 5:05 | - | - | 5:05 | - | - | 5:07 | - | - | 5:07 | - | - |
| Sunset | - | 9:46 | - | - | 9:46 | - | - | 9:45 | - | - | 9:45 | - | - | 9:45 | - | - | 9:44 | - | - | 9:43 | - | - | 9:43 | - | - | 9:42 | - | - | 9:40 | - | - | 9:39 | - | - | 9:38 | - |
 |  |  | |  |  | | |  |  | | | | | | | |  | | | | | | | | | | | | | | | | | | | |
Rain (mm) | - | 3 | 4 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 16 | 14 | 14 | 16 | 16 | 16 | 14 | 15 | 14 | 14 | 14 | 14 | 13 | 16 | 17 | 17 | 19 | 19 | 18 | 19 | 19 | 20 | 21 | 20 | 19 | 19 | 17 | 19 | 19 | 19 | 18 | 20 | 20 | 20 | 21 | 20 |
| Feels °C (?) | 10 | 8 | 7 | 12 | 12 | 13 | 10 | 12 | 7 | 9 | 10 | 13 | 11 | 12 | 14 | 15 | 17 | 18 | 17 | 18 | 18 | 18 | 19 | 18 | 18 | 17 | 16 | 17 | 16 | 17 | 16 | 18 | 16 | 16 | 18 | 18 |
Short Range Forecast: Light rain (total 7mm), mostly falling on Fri night. Very mild (max 16°C on Fri morning, min 12°C on Sun night). Winds decreasing (strong winds from the SW on Fri afternoon, light winds from the WSW by Sat night). | Days 3-6 Weather Summary Mostly dry. Very mild (max 19°C on Wed afternoon, min 12°C on Mon night). Winds decreasing (fresh winds from the NNW on Mon morning, calm by Wed night). | Days 6-9 Weather Summary Mostly dry. Warm (max 21°C on Fri afternoon, min 16°C on Sat night). Wind will be generally light. | Long Range Forecast: Mostly dry. Warm (max 21°C on Tue afternoon, min 17°C on Sun night). Wind will be generally light. | |||||||||||||||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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.
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