Trearddur Bay (Holy Island) Surf Forecast and Surf Report

Alright folks, Rusty here. Let's have a look at what Trearddur Bay (Holy Island) has in store for us. I gotta be straight with you—it's not looking like the best run for this spot over the next 16 days. There are long gaps with nothing really happening, so patience is going to be key.

The overview is pretty quiet. We're starting off with a lot of small, weak swell and mostly onshore or cross-shore winds that are just killing any chance of a decent wave. For the first week, from today, September 9th, right through to the 15th, it's a write-off. The swell is tiny, the period is short, and the wind is all over the place. The combined wave energy is weak, staying well under 100 for most of that time—a lot of it sitting in the teens and single digits. It's just flat and messy.

There is a bit of a spike on Thursday the 10th, with swell jumping to 5 ft in the morning and 8 ft in the afternoon, but the wind is howling from the south at 25 mph, making it a complete washing machine. That's not surfable, that's a survival mission. The wave energy gets up into the moderate range and even strong (154 to 530), but with that wind, it's just a churned-up mess.

The first real glimmer of hope doesn't come until Wednesday morning, September 16th. We've got a clean 4 ft swell with a light cross-offshore breeze from the east-southeast. The period is a short 6 seconds, so it won't be the most powerful, but it's clean and rideable. The wave energy is moderate at 131. It's a tiny window, though; by the afternoon, the wind swings around and messes it up again.

After that, it dries right up again. From the 17th right through to the 24th, we're looking at tiny swell—mostly under 3 ft—and while there are a few clean days towards the end (the 20th to the 24th) with glassy or offshore winds, the swell is just too small to get excited about. It's flat. A few days, like Tuesday the 22nd, have a glassy 3 ft wave, but with a period of 4 seconds, it's going to be a dribbly close-out.

Honestly, the standout by default is that Wednesday morning on the 16th. It's the only time we get both a bit of size and clean conditions. For a beginner spot, anything over 5 ft starts to get a bit much, so the 4 ft isn't too bad, and the light offshore wind will make it glassy. Just don't expect power or consistency from that short-period swell.

So, there you have it. It's a long, quiet period for Trearddur Bay. Keep an eye on the 16th, but otherwise, the board is staying in the van for a while.

Rusty

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