Trearddur Bay (Holy Island) Surf Forecast and Surf Report

Alright, folks, Rusty here. Let's have a look at what Trearddur Bay on Holy Island has got cookin’ for us over the next couple of weeks. Straight up, it’s a tough outlook for a beginner-friendly spot that’s normally fairly exposed to a SW swell. The problem is, for the first ten days, the wind is just a nightmare. It’s mostly onshore or cross-onshore, and when you combine that with a very short period swell, it’s just messy, choppy, and not worth paddling out. There’s a proper dead zone from the start all the way through until the 10th of September. After that, things get interesting, but it’s a long wait.

Alright, let's get into the details. The water temp is about average for the time of year, so no drama with a winter wetsuit just yet.

The first real glimmer of hope comes on Friday the 11th of September. The morning is looking glassy with a slight air, and that’s a massive positive. You’ll have a 4ft SSW swell pushing in with a combined energy of 151, which is moderate. It’s not going to be world-class, but for Trearddur Bay, the clean conditions make it surfable. The real standout, though, is the afternoon of that same day. The swell bumps up to 5ft from the SW, the period is still short at 7 seconds, but the magic happens with the wind. A light, cross-offshore breeze from the NNW will make for clean waves. The combined energy jumps to 377, which is solid. This is the best on offer in the whole 16-day window. It’s a proper window of opportunity for a few fun, clean waves.

Now, because this is Trearddur Bay and it’s inconsistent, you take what you can get. The crowd factor is listed as ‘sometimes’, so during that Friday afternoon window, expect company. It’s a beginner spot, and while the 5ft swell is right on the limit for learners, the clean conditions make it manageable. For the more experienced, it’s a no-brainer.

After Friday, it drops off again. Saturday the 12th has tiny, clean waves from an offshore wind, but at 2ft, it’s barely a ripple. The rest of the second week is flat, with periods of glassy conditions but barely any swell. On Tuesday the 15th, there’s a very long period swell (13 seconds) from the WSW, but it’s only 0.7ft, so it’s a dud. That long period on a beach break like this means the waves would break straight and close out if there was any power, but there isn’t any.

So there you have it. A long, frustrating dry spell, then one standout session on the afternoon of Friday the 11th. If you can wait it out, that’s your window. For the rest, it’s flat and clean, or windy and messy. Roll on that Friday.

Rusty.

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