Cable Bay (Porth Trecastell) Surf Forecast and Surf Report

Alright mate, Rusty here. Let’s have a look at what’s cookin’ at Cable Bay for the next couple of weeks.

To be straight with you, it’s a pretty grim outlook for the majority of the window. We’ve got some energy coming through, but the wind is mostly ruining it, and the swell quality is just not there for a decent paddle. There’s a long stretch of poor conditions, especially through the back half of August and into early September. The water temp is sitting about average for the time of year, nothing unusual there.

We kick off from Tuesday the 25th of August with tiny 0.33 ft to 1 ft SSW swells. The wind is offshore or cross-off, keeping things clean, but there’s simply no size or power to work with. The combined energy is pitiful, in the single digits to low teens (7 to 17). It’s a flat spell, plain and simple.

That flatness drags on through Wednesday and Thursday. You’ll see a glassy session on Wednesday afternoon with 1 ft SSW swell and no wind, but again, tiny. Through Friday the 28th, we get a pulse of 5 ft SSW swell, but the wind swings onshore and strong from the W at 19 mph, turning it into lumpy, cross-onshore junk. The energy ticks up to 116, but the quality is zero.

The weekend and into the following week gets worse. Saturday and Sunday see increasing onshore winds, with Sunday afternoon the 30th seeing a 7 ft SSW groundswell (7-second period) and onshore winds at 22 mph, giving a combined energy of 332. It’s a messy, blown-out scene.

Then from Monday the 31st of August through Tuesday the 1st of September, it gets serious but not for surfing. We’re looking at 10 ft to 8 ft WSW to SW swell with strong to gale-force onshore winds. The combined energy hits 705 and 629. For a beach break like Cable Bay, this is all kinds of bad. The setup looks far more interesting for kite surfing than paddle surfing, honestly. It’s only for experts if they’re stupid enough to try, and even then, the wind is terrible.

Things calm down a bit through the 2nd and 3rd of September, with swell dropping back under 3 ft and some cleaner windows on the 3rd with a NNW cross-off wind. But again, tiny and unexciting.

Now, if you’re patient, there’s one standout window that might be worth the wait. On Saturday the 5th of September, the morning shows some promise. We’ve got a 5 ft WNW swell (6-second period) with a cross-off wind from the ENE at 12 mph, keeping it clean. The combined energy is a moderate 231. It’s not a huge swell, but it’s the best looking combination of size and clean conditions in the whole outlook. Crowds are possible here, so get down early.

The following Tuesday the 8th brings a very long-period groundswell (17 seconds) from the SW at 1 ft, but the energy is still low. That long period might offer a few clean lines at a point or reef, but at a beach break like this, it’ll likely break too straight to do much with. Wednesday the 9th morning has a clean, offshore 2 ft SW swell with a moderate 32 energy, but it’s small and inconsistent.

So, the honest call: the best on offer is the morning of Saturday the 5th of September with that 5 ft WNW swell and clean cross-off winds. The rest of the forecast is mostly a write-off, with a big gap of unsurfable or tiny conditions dominating the next week and a half. Keep your eye on it, but don’t hold your breath.

Rusty.

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