Trearddur Bay (Holy Island) Surf Forecast and Surf Report

Right then, let's have a look at what we've got for Trearddur Bay on Holy Island. I'll be straight with ya – this forecast is a rough one for us surfers. Honestly, looking at the whole 16-day window, there's a stack of "poor surf conditions" reports. The wave energy is mostly weak, with readings like 44, 26, even down to single digits on some days. The water's sitting at 64°, which is a touch warmer than what we'd normally expect for this time of year.

For the first week, from Saturday the 29th right through to the 7th of September, it's a real struggle. We get tiny swell, mostly around 2 ft to 4 ft, mixed with strong onshore or cross-shore winds that are just wrecking any chance of a clean wave. The wind is gusting from 19 mph up to 25 mph from the S and SSW, making it lumpy and messy. There's a bit more size on the 31st of August with a 5 ft NW swell and moderate energy (218), but that NW wind is howling at 25 mph, creating a messy cross-chop. Later in the week, around the 2nd and 6th of September, we see the swell picking up to 6 ft and 8 ft, but again, it's accompanied by strong onshore winds from the SSW and SW. That's just ugly surf. The whole week is pretty much a write-off.

Then we hit a dry spell. The 7th of September has a tiny 2 ft bump, and the 8th and 9th are flat with next to no energy (energy readings of 8 and 7). You're looking at about two days of nothing worthwhile.

Now, things get interesting way out at the end, on Thursday the 10th of September. The swell jumps up to a solid 12 ft from the SW, with a period of 8 seconds. The wave energy is huge—we're talking 1,961 and 2,039. But here's the kicker, it's predicted to be too big for Trearddur Bay. The morning on the 10th has light cross-shore winds from the SSE at 6 mph, so conditions might be glassy, but the sheer size of that swell is going to close out the bay and be dangerous. That one is for absolute experts only, and even then, it's a heavy paddle.

After that, it drops back down. The 11th and 12th of September see the swell shrink to 4 ft and 3 ft, but we're back to fresh, lumpy cross-onshore winds.

So, to sum it up: the best of a bad bunch is that far-off date of Thursday the 10th of September. It's the only time we get any serious power and groundswell potential, but you have to be an absolute charger to even think about it, and it's still a big, unpredictable cleanup set. For the rest of us, this forecast is a solid two weeks of disappointment.

Rusty.

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