Trearddur Bay (Holy Island) Surf Forecast and Surf Report

Alright folks, Rusty here. Let’s have a proper look at what’s on the table for Trearddur Bay over the next couple of weeks.

To be straight with you, the outlook is a tough one. The bulk of the forecast is filled with "poor surf conditions," and honestly, there’s no stretch that I’d call a standout. The swell is small and weak, the wind is mostly cross or onshore making a mess of things, and the whole first week and a half looks like a write-off. You’re looking at a gap of well over a week before anything even hints at being rideable. The energy is barely registering, often in the single digits or low double figures. For the few moments where you do get a bump, it’s coming from the SSW or SW, which isn’t what this spot ideally wants.

Now, let’s be fair about what’s on offer. The best chance we get is right at the very tail end. On the morning of the 23rd of September, the conditions finally line up. We get a glassy session, wind from the ENE at only 3 mph. There’s a 3 ft SSW swell, but it’s short period at only 4 seconds, so it’s weak, wind-affected slop rather than proper groundswell. The combined energy is only 39—pissant stuff. But for a beginner spot that’s inconsistent, the clean surface will be the main draw. It’s not a day to get excited about power or shape, just a chance to paddle around on a lake-like surface. The afternoon of the 23rd is similar, glassy again with a 3 ft SSW, period bumping to 5 seconds, and energy at 48. Still tiny, but clean.

Further out, the morning of the 25th of September shows a bit of hope. Clean conditions with a light cross-offshore breeze from the NNW at 6 mph. The swell is only 2 ft from the SSW, period still short at 4 seconds, energy of 12. That’s very weak, but the clean face will be the only game in town. It’s rideable for a log or a foamie, but don’t expect any punch.

Look, there is no big swell, no long-period groundswell, and no proper standout window. The water temp on the 14th comes in at 62°F, which is a touch warmer than normal for the time of year, so you won’t need a thick suit. But the waves just aren’t there. If you’re desperate for a splash on a longboard, the glassy mornings on the 23rd are your only real shout. For anything with any push or quality, this forecast is a blank. Hang tight and check back in a few days—conditions can always change.

Rusty.

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