Trearddur Bay (Holy Island) Surf Forecast and Surf Report

Alright folks, Rusty here, and I’ve got the goods for Trearddur Bay (Holy Island). Let’s just get this out there right now – the whole 16-day window is a bit of a struggle, so don’t be expecting much. I’ll run through it day by day.

To start, the water is sitting at a touch warmer than normal for this time of year, around 63°, which is a nice little bonus.

The first chance for a paddle comes on Monday, 31 August, but it’s a real dud. We’ve got a tiny 2 ft SW swell, only 8 seconds apart, with a cross-onshore wind at 12 mph. The combined energy is a weak 73, and it’s just poor, choppy surf. Not worth the wet suit.

Tuesday, 1 September, is a no-go. The morning brings a clean onshore wind, but the swell is even smaller and the period is a pathetic 4 seconds – just 23 in energy. The afternoon has a little more size at 4 ft, but the wind is onshore and strong at 19 mph, and the energy is still only 61. It’s messy.

Wednesday, 2 September, offers a bit more size – 5 ft in the afternoon from SSW, 6 seconds, with 194 in energy – but it’s a fresh cross-onshore and lumpy. Still poor.

Thursday, 3 September, is more of the same. Morning has 4 ft onshore, moderate energy at 102, but it’s poor. The afternoon drops off.

Friday, 4 September, has a 5 ft WSW swell in the morning, but the wind is a fresh cross-onshore at 22 mph, making it lumpy. The energy is 129, but it’s just not clean.

Saturday, 5 September, is a total write-off. The morning is barely 1 ft, and the afternoon is a tiny 0.3 ft with a 13-second period, but the wind is still cross-onshore. Energy is down to 11. It’s a flat, frustrating day.

Sunday, 6 September, is similar – small, weak, and cross-onshore.

Monday, 7 September, almost shows a glimmer of hope in the afternoon. The wind swings to a light cross-offshore from the north at 6 mph, and it’s clean. But the swell is a pathetic 1 ft, energy at 10. It’s clean, but there’s nothing to ride.

Tuesday, 8 September, stays poor. The afternoon brings a 6 ft SSW swell, 6 seconds, and 204 energy, but it’s a fresh cross-onshore and lumpy.

Wednesday, 9 September, is the biggest swell of the window – 6 ft from SW in the afternoon, 6 seconds, 278 energy. But it’s onshore with a strong breeze at 28 mph. The size is there, but it’s a messy, blown-out onshore mess. That’s more for the kitesurfers than us.

Thursday, 10 September, the wind gets nasty – a gale force cross-onshore at 43 mph with 5 ft swell. Completely blown out. Avoid.

From Friday, 11 September, through to Tuesday, 15 September, the swell drops off to nothing – 0.3 ft or 0.7 ft, with energy below 10. The wind does get clean at times, like glassy conditions on Saturday, 12 September, morning, or clean cross-offshore on Sunday, 13 September, morning, but there’s genuinely no wave to ride. Even the last day, Tuesday, 15 September, is clean with a cross-offshore breeze, but it’s a 0.3 ft swell.

So, to be straight with you: there is no standout session in this 16-day stretch. It’s a long, flat, and often windy run. The only thing worth noting is the clean conditions on the 7th, 12th, 13th, and 15th, but without swell, they’re just pretty days. That’s the reality for Trearddur Bay right now. Forecasts can change, but for now, I’d say keep the board in the van.

Rusty.

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