Cable Bay (Porth Trecastell) Surf Forecast and Surf Report

Alright, folks, Rusty here. Let's get straight into it and look at what's on the cards for Cable Bay (Porth Trecastell) north-west coast of Anglesey. I'll be honest, this is a tough period. There are some serious issues with this forecast.

Looking at the whole stretch, it's a mostly bleak run. The biggest problem is the wind direction – it's blowing straight from the SW for days on end, which is a direct onshore wind for this exposed SW-facing bay. That kills the wave quality stone dead. The water temperature is sitting around 63°F, which is a touch warmer than normal for the time of year – not a major anomaly, but a bit of a treat if you’ve got a thinner wetsuit.

The surf kicks off Tuesday, September 1st, but don't get excited. We've got a weak 3ft swell from the SW with a nasty short period of 4 seconds and a 16 mph onshore wind. The combined energy is a pathetic 21 (weak energy) – basically windslop. Tuesday afternoon is a bigger 19 mph breeze, all messy. Wednesday the 2nd sees a little more size, hitting 6ft, but it's cross-shore and still choppy. The energy jumps to 173 (moderate energy), but the quality is ruined by the wind. This pattern of onshore or cross-onshore wind and small, weak swell continues right through the first week. Thursday and Friday are more of the same: small, bumpy, and not worth paddling out for.

Saturday the 5th and Sunday the 6th are flat and messy, with barely 1ft to 4ft of swell and all the wrong winds. Monday the 7th is another write-off. Then we hit a weird one on Tuesday the 8th – the swell jumps to 8ft from the WSW with a period of just 6 seconds. The combined wave energy hits a massive 418 (strong to very strong wave energy). But here’s the catch: the wind is howling onshore at 28 mph. We're talking huge, blown-out, dangerous washing machine conditions. That's 100% for experts only if they’re desperate, and honestly, with that much wind, the setup looks more interesting for kite surfing than paddle surfing. Wednesday the 9th is still messy and windy.

Then we hit a dead zone. From Thursday the 10th right through to the end of the period, the swell collapses. Thursday the 10th, we get a clean cross-offshore wind, but the swell is only 2ft. Friday the 11th is glassy and clean, but we're down to 0.3ft of swell – a flat calm. Saturday and Sunday the 12th and 13th are equally tiny. There’s a slight flicker on Monday the 14th – a 4ft swell with a glassy morning, and the comments say “surfable waves but very ordinary conditions.” The energy is only 66 (weak energy), so it's small and clean but nothing special. That's the closest we get to a recommendation. Tuesday the 15th and Wednesday the 16th finish the run with onshore winds and messy small waves.

So, what’s the best on offer? Honestly, it’s the morning of Monday, September 14th. It's the only window with glassy conditions and a hint of a wave. We’re looking at about 4ft of swell from the WSW, but with that glassy, clean surface, it could be a fun, mellow longboard session. The combined swell energy is only 66 (weak energy), so don’t expect any power, but it’ll be the cleanest wave in the whole 16 days. Just don’t expect much – the crowd profile says "sometimes", so there might be a few others with the same idea.

Other than that, the long-range looks desperate. There's a lot of flat water ahead. For a spot that is fairly consistent, this blank run is a real letdown.

Rusty.

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