Trearddur Bay (Holy Island) Surf Forecast and Surf Report

Alright folks, Rusty here. Let’s be honest, this is a tough one for Trearddur Bay (Holy Island). The whole 16-day window is looking pretty grim. I’ve gone through the numbers, and there’s only one afternoon that’s even worth a mention, and even that’s not a guarantee. The rest of the time, it’s a whole lot of wind and messy, poor surf.

For the first week and a half, from the 7th right through to the 16th of September, we’re looking at a real struggle. The wind is mostly onshore or cross-onshore, often from the SW or SSW, which is the worst direction for this spot. Swell heights are all over the place, but the wind is just ruining it. The combined energy is weak, usually under 100, and on the 7th morning it’s only 63 – pathetic. The water temp is about average for the time of year, but you won’t care about that when you’re getting blown off your board.

Things get a bit more interesting on the 12th and 14th, where the swell energy picks up, hitting 253 and 203 respectively, and the swell height gets to 6 ft, but the wind is a near gale or fresh onshore breeze. It’s blown out. It’s a kitesurfer’s dream, not a paddle surfer’s. The 14th sees a 5 ft swell with a period of 6 seconds, but it’s just onshore slop.

Then, on the 17th of September, we finally get a window. On Thursday afternoon, the wind swings to a light NNE breeze, going cross-offshore. The combined swell energy jumps to 384, and the wave height is a solid 7 ft from the NW with a 6-second period. The wave comment finally says “expect good surf conditions.” This is the one. For a brief moment, the stars align. But that 7 ft is getting up there; it’s probably not one for the beginners. It’s clean, but it’s a short period swell, so it’ll be a bit dumpy and not the most powerful. Still, it’s the only real chance you’ve got.

After that, it’s back to the same old story. The 20th of September sees a 7 ft swell with a 450 combined energy, but by Sunday afternoon the wind is cross-shore, and the comment says “gentle cross-shore with slight cross-chop.” It’s not the clean, groomed stuff we’re after. The rest of the time, it’s tiny, onshore, or both.

So, there you have it. A long stretch of nothing, a single, slightly promising afternoon on the 17th, and then back to the grind. It’s a tough run for Trearddur Bay. Don’t hold your breath, but keep an eye on that Thursday afternoon. Forecasts can change.

Rusty.

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