Trearddur Bay (Holy Island) Surf Forecast and Surf Report

Alright, Rusty here. Let's have a look at what's on the cards for Trearddur Bay (Holy Island) over the next couple of weeks.

To be straight with you, it’s a tough stretch ahead. The forecast is showing a long run of poor surf conditions right through the period, with nothing that I’d call a proper standout session. The water temp is sitting at 62°, which is a touch warmer than normal for this time of year, so you won’t need the thickest rubber, but that’s about the only thing going for us.

The first few days are pretty much a write-off. Through the rest of September, we’ve got a mix of onshore and cross-onshore winds with choppy, lumpy conditions, and the swell is either too small or badly shaped. The wave energy is weak, often under 100 (18 on Sunday the 13th, for example), and the swell periods are short, around 5 to 6 seconds, so it’s all windswell with no real push. Even when the height bumps up to 5 ft to 6 ft around the 17th to 19th, the wind is strong and cross-onshore, making a mess of it. That setup would be more interesting for kite surfing than paddle surfing, honestly.

We finally get a change in the wind around the 22nd and 23rd of September. Tuesday the 22nd morning shows a cross-offshore breeze from the NNW at 15 mph, with a 4 ft swell from the WSW, period 6 seconds, and a clean wave face. That’s the best we see, but the energy is only moderate (120). It’s still not a standout, just the cleanest option in a bad run. Then Wednesday the 23rd morning has a 5 ft swell from the NW with a 19 mph cross-offshore wind, also clean, and the energy climbs to 189. By the afternoon, it’s up to 6 ft with 308 energy, still clean, but that size with a short period is a bit fat and crumbly, and it’s really only for experienced surfers at that point.

After that, it fades fast. From the 24th onward, we’re down to tiny, weak swell—less than 1 ft—with almost no energy. The winds are light or glassy, but there’s nothing to ride. It’s a long gap of flatness stretching through to the 28th.

So, the pick of a bad bunch is the morning of Tuesday the 22nd for a clean, rideable wave, and maybe the morning of Wednesday the 23rd if you’re comfortable with a bit more size. But honestly, there’s no real gem here. Just keep an eye on the charts.

Rusty.

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