Surf Forecasts:
Trearddur Bay (Holy Island) surf forecast from 6 Jul 2026:
- Most powerful swell: Tuesday 7 Jul, 1AM (local time) - 2.5ft (0.7m), 5s period, SSW swell with 21 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 0.7m 5s and forecast to arrive on Tuesday (Jul 07) at 1AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 6s period and expected on Saturday (Jul 11) at 4AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 1AM (Tue 7th Jul) | 2.5ft (0.7m) 5s |
Table - best surf conditions forecast for Trearddur Bay (Holy Island) over the next 16 days.
Updates in hr min s Forecast update imminent
Alright folks, Rusty here. Let's have a look at what Trearddur Bay on Holy Island has got cooking for us over the next couple of weeks.
Right off the bat, I gotta be straight with you – it's a tough stretch. The first few days are a write-off. Monday the 6th is a total no-go with a weak, choppy 2ft cross-on shore bump. That sets the tone for the first week, really. From Monday the 6th right through to the end of Sunday the 13th, we are looking at a flat spell. Tiny, weak waves and mostly onshore or clean but absolutely no swell to speak of. It's a long, dry gap, and you’d be better off leaving the boards in the car for a solid week. Even when we get a bit of offshore wind later in that run, there's just nothing to ride.
The second week doesn't offer much salvation either. From Monday the 14th of July through to Monday the 21st, we see a faint whisper of life, but it's only a tiny 0.3ft pulse. The wind is often offshore and clean, which is a positive, but on a setup like Trearddur Bay (a fairly exposed beginner break), these tiny, long-period waves are more of a ripple than a ride. The combined energy is weak, barely cracking double digits (like 10 to 16 on the best days). We're talking about a summertime flat spell, and for this area, that's just the way it goes sometimes.
Honestly, there isn't a single standout session in this entire 16-day outlook. For a beginner spot, the one tiny bit of hopeful news is the morning of Monday the 21st of July. It's forecast to be glassy with a 0.3ft from the SW. But that's a real long shot, and I wouldn't plan my week around it. For the rest of it, if you're a kite surfer, those fresh, clean offshore breezes in the second week might be more your thing, because for us paddle surfers, there's just nothing to work with here.
Keep the wax soft and check back in, things change.
Rusty.
Short Range ForecastMostly dry. Warm (max 20°C on Wed afternoon, min 14°C on Mon night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 21°C on Thu afternoon, min 14°C on Fri night). Winds increasing (light winds from the NW on Thu afternoon, fresh winds from the NE by Sat night). | ||||||||||||||||||||
Mon 6 | Tuesday 7 | Wednesday 8 | Thursday 9 | Friday 10 | Saturday 11 | Sunday 12 | |||||||||||||||
PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | |
Swell Height Map |  |  |  |  |  |  |  |  | |||||||||||||
Wave Height (m) Direction Period (s) | SSW 5 | SSW 5 | NW 4 | NW 4 | SW 4 | SSW 3 | — | — | S 11 | WNW 3 | — | — | N 3 | NNW 6 | NNW 6 | N 5 | N 5 | NE 5 | NE 4 | NE 4 | NE 3 |
Wave Graph  | |||||||||||||||||||||
 kJ | 14 | 21 | 16 | 4 | 3 | 1 | 0 | 0 | 3 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | on | cross-on | cross-on | cross-on | on | cross-on | cross | cross | off | off | cross-off | cross-off | cross-off | cross-off | off | off | off | off | off |
High Tide | 3:35AM5.04m | 4:10PM4.65m | 4:27AM4.93m | 5:07PM4.59m | 5:27AM4.83m | 6:12PM4.58m | 6:36AM4.79m | 7:23PM4.67m | 7:51AM4.85m | 8:33PM4.86m | 9:01AM5.02m | 9:34PM5.14m | 10:03AM5.23m | ||||||||
Low Tide | 9:23PM1.62m | 9:55AM1.33m | 10:15PM1.72m | 10:50AM1.43m | 11:15PM1.80m | 11:52AM1.51m | 00:24AM1.81m | 1:00PM1.53m | 1:36AM1.68m | 2:09PM1.44m | 2:44AM1.43m | 3:11PM1.28m | 3:45AM1.10m | ||||||||
 |  | |  |  | | | | | | | | | | | | | | | | | |
 | — | — | 5:00 | — | — | 5:00 | — | — | 5:01 | — | — | 5:03 | — | — | 5:03 | — | — | 5:05 | — | — | 5:05 |
 | — | 9:45 | — | — | 9:45 | — | — | 9:45 | — | — | 9:44 | — | — | 9:43 | — | — | 9:43 | — | — | 9:42 | 9:40 |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 18 | 18 | 16 | 19 | 19 | 19 | 20 | 20 | 19 | 21 | 21 | 21 | 21 | 17 | 18 | 19 | 19 | 19 | 19 | 20 | 17 |
Feels °C | 15 | 17 | 13 | 16 | 17 | 19 | 20 | 19 | 18 | 20 | 21 | 19 | 19 | 13 | 15 | 16 | 15 | 14 | 14 | 16 | 12 |
Swell 1 Height (m) Direction Period (s) | WNW 3 | SSW 5 | NW 4 | NW 4 | S 12 | SSW 3 | — | — | S 11 | WNW 3 | — | — | — | — | NNW 6 | NW 5 | N 5 | — | — | — | — |
| kJ | 1 | 21 | 16 | 4 | 3 | 1 | — | — | 3 | 1 | — | — | — | — | 72 | 7 | 25 | — | — | — | — |
Swell 2 Height (m) Direction Period (s) | — | — | SW 4 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | 5 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | S 12 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SSW 5 | NW 4 | — | SSW 3 | SW 4 | WNW 3 | — | — | WNW 3 | NNW 3 | — | — | N 3 | NNW 6 | — | N 5 | NE 5 | NE 5 | NE 4 | NE 4 | NE 3 |
| kJ | 14 | 3 | — | 3 | 3 | 1 | — | — | 1 | 1 | — | — | 4 | 97 | — | 45 | 17 | 14 | 20 | 12 | 3 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 250 | 251 | 236 | 407 | 246 | 246 | 284 | 246 | 184 | 234 | 241 | 182 | 187 | 241 | 267 | 318 | 267 | 371 | 364 | 284 | 208 |
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