Trearddur Bay (Holy Island) Surf Forecast and Surf Report

Right then, let’s have a look at what’s on offer for Trearddur Bay over the next couple of weeks. I gotta be straight with you—it’s a tough start. The whole first ten days or so are pretty much a write-off. We’ve got onshore winds, cross-shore chop, and hardly any real energy in the water. Most days the combined swell energy is barely registering—often below 100 (weak energy), and the wave comment keeps saying "poor surf conditions". Even when the swell bumps up a bit, like Saturday the 12th with 8ft and 505 (moderate energy), the wind is howling onshore at 25 mph, so it’s just a mess.

There’s a real dry spell until we get to the 21st of September. That Monday afternoon things start looking up—finally a clean-looking window with a cross-offshore breeze, 7ft swell from the WNW, period of 6 seconds, and the combined energy sitting at 299 (moderate). The wave comment says "expect good surf conditions", and the wind is light and gentle. That’s the first real standout, and it’s about time.

Then, if you can hold out, the 25th and 26th of September are where the magic could really happen. On Friday the 25th, we’ve got a proper pulse: 12ft from the SW early morning, with a period of 8 seconds, and the combined energy is 1869 (strong). But—and it’s a big but—that morning the swell is predicted to be too big for this break, so it’s really only for experts. The wind is light cross-shore, so it’ll be clean, but it’s serious size. The afternoon of the 25th is the real gem: 10ft, period 9 seconds, cross-offshore breeze, and a combined energy of 2125 (very strong). The wave comment says "excellent surf conditions for experienced surfers". That’s your best bet if you’ve got the skills and a big board. Saturday the 26th morning still has 10ft, cross-offshore breeze, combined energy 964 (moderate-strong), and "expect very good surf conditions". Crowds at Trearddur Bay are sometimes an issue, and with a run this good, you can bet it’ll be busy.

The water temperature is about average for the time of year, so no need for a thick suit just yet. But if you’re a beginner, steer well clear of the big days—anything over 5ft is pushing it, and 8ft+ is expert territory only.

So overall, the first week is a bust. The second week brings a couple of corkers, especially the 25th afternoon and 26th morning. Load up the car and keep your fingers crossed.

Rusty.

Read more