Trearddur Bay (Holy Island) Surf Forecast and Surf Report

Alright, let’s get this straight. I’ve looked over the charts for Trearddur Bay on Holy Island, and I’ll be honest with you, mate – it’s a grim outlook. We’re looking at a 16-day stretch where there’s barely a ripple worth paddling for.

For the first week, from July 25th right through to the 31st, it’s a total write-off. There’s surf, sure, but it’s tiny, weak, and the wind is almost always on it or cross-onshore, making a mess of things. You’ve got swell heights hanging around 1ft to 4ft, but with short-period windswell and miserable combined energy (most days under 100). It’s a lot of “poor surf conditions” – the kind where you spend more time untangling your leash than riding.

We finally see a glimmer of hope on the afternoon of July 31st. The wind swings offshore from the NE, and the swell bumps up to 5ft from the south with a combined energy of 102 – that’s moderate energy, finally. The period is still a short 5 seconds, so it’s not going to be a thing of beauty, but with clean, offshore wind, it’s the first proper chance to get a wave.

The morning of August 1st is similar: NE offshore wind, 2ft swell from the SW but with a longer 8-second period, giving it a bit more shape for a beach break like this. Combined energy is 67, so it’s still weak. It’s surfable but very ordinary. After that, it drops right off again.

From August 2nd to the 4th, it’s back to flat or near-flat conditions with cross-shore or onshore wind. August 5th is a real tease. The swell punches up to 8ft from the SW on Wednesday morning, with a period of 7 seconds and a combined energy of 595 – strong energy. But the wind is a fresh cross-onshore, turning it into a lumpy, choppy mess. That size with that wind makes it look more interesting for kite surfing than paddle surfing. The afternoon has that swell dropping to 8ft with a 9-second period, and the cross-onshore is gentler, but the wave comment says “gentle cross-onshore and fairly choppy” – it’s not clean.

The rest of the run into the second week, from August 6th to the 9th, is flat and clean but completely undersized – we’re talking 0.3ft to 2ft. Useless.

So, where’s the best? It has to be that window from the afternoon of July 31st through the morning of August 1st. Is it a standout? Not really, because the swell is weak and the period is short, but it’s the only time we get offshore wind and a wave *at all*. Trearddur Bay (Holy Island) is inconsistent and a beginner’s spot, so don’t expect perfection. Crowds are possible here, too.

Water temp? No anomaly is supplied in the data, so it’s just average for the time of year.

Overall, it’s a tough 16 days. Hold tight, forecasts can change.

Rusty.

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