Surf Forecasts:
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 Type | Time (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 ForecastLight 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 SummaryMostly 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 | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
Wave Height (m) Direction Period (s) | N 6 | N 6 | N 5 | S 13 | S 13 | WSW 3 | W 4 | WSW 5 | WSW 4 | WNW 5 | NW 5 | NW 5 | W 4 | SSW 3 | SW 4 | SSW 4 | SW 4 | SW 4 | SW 3 | SW 3 | SW 5 |
Wave Graph  | |||||||||||||||||||||
 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) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | 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 | ||||||||
 | |  |  | |  |  | |  |  | | | | | | | | | | |  | |
 | 5:20 | — | — | 5:20 | — | — | 5:22 | — | — | 5:24 | — | — | 5:26 | — | — | 5:26 | — | — | 5:28 | — | — |
 | — | — | 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 |
Swell 1 Height (m) Direction Period (s) | — | — | N 5 | N 4 | NW 4 | — | S 12 | S 12 | S 11 | SW 5 | SW 6 | SW 6 | NNW 5 | NNW 4 | — | — | SW 4 | WSW 4 | — | — | SW 5 |
| kJ | — | — | 11 | 6 | 2 | — | 3 | 3 | 2 | 12 | 16 | 5 | 18 | 4 | — | — | 5 | 1 | — | — | 24 |
Swell 2 Height (m) Direction Period (s) | — | — | — | S 13 | S 13 | — | S 12 | S 12 | — | SW 8 | — | — | SSW 5 | WNW 4 | — | — | — | — | — | — | — |
| kJ | — | — | — | 3 | 3 | — | 3 | 3 | — | 2 | — | — | 3 | 1 | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | N 6 | N 6 | — | — | — | WSW 3 | W 4 | WSW 5 | WSW 4 | WNW 5 | NW 5 | NW 5 | W 4 | SSW 3 | SW 4 | SSW 4 | — | SW 4 | SW 3 | SW 3 | — |
| kJ | 74 | 49 | — | — | — | 4 | 19 | 40 | 17 | 48 | 33 | 42 | 8 | 3 | 21 | 18 | — | 2 | 3 | 2 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 280 | 1083 | 246 | 415 | 1515 | 407 | 376 | 376 | 194 | 390 | 1084 | 195 | 251 | 251 | 246 | 246 | 246 | 246 | 249 | 249 | 249 |
Best forecast wave conditions in Anglesy | |||||||||||||||||||||
Best forecast wave conditions in United Kingdom | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
- 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 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.
Nearest