Cable Bay (Porth Trecastell) Surf Forecast and Surf Report

Alright, let’s slice it the other way. I’m looking at the full 16-day window for Cable Bay, and I gotta tell you—it’s a rough stretch. There’s no surf worth chasing for the first couple of weeks, and the only faint glimmer of hope comes right at the very end.

We start off on Monday the 27th of July. The water’s a touch warmer than normal for this time of year, sitting at 63°, but that’s where the good news ends. Swell is tiny, under 3ft, with a weak 4-second period—total windswell junk. Winds are onshore and strong, 12 to 19 mph, and the combined energy is pathetic, just 15 to 26 (weak). Conditions are poor, no surf to speak of.

Tuesday the 28th is more of the same. Swell bumps up a little to 4ft to 5ft, but it’s still short-period (5 seconds) and the wind is a fresh 19 mph cross-onshore. The combined energy climbs to 106 (moderate), but it’s lumpy and messy. Not worth a paddle.

From Wednesday the 29th all the way through to Friday the 7th of August, the story doesn’t change. Swell heights hover between nothing and 3ft, periods are mostly 4 to 6 seconds, and the winds are either onshore, cross-onshore, or occasionally glassy but with zero swell. The combined energy readings are mostly in the single digits or low teens (weak). There’s a few days of clean offshore winds on the 5th and 6th of August, but the swell is practically non-existent—0.3ft to 1ft. It’s a long, flat spell.

Finally, on Saturday the 8th of August, we get a pulse. The morning sees a 6ft swell from the WNW with a 6-second period, and the combined energy hits 178 (moderate). The wind is light offshore from the ENE at 6 mph, keeping it clean. This is the only real standout in the whole outlook. It’s not huge, but for Cable Bay, it’s the best you’re gonna get. The swell direction (WNW) is a bit off from the optimum SW, but with offshore winds and clean conditions, it’s worth a look. The afternoon sees the wind pick up to 16 mph, still offshore, but the swell drops to 4ft. Sunday the 9th of August has clean, cross-offshore winds but the swell backs off to 3ft to 4ft from the NW, with moderate energy (55 to 70). After that, it fades back to tiny, weak surf for the rest of the window.

So, the honest truth: there’s only one day that even comes close to being worth it—Saturday the 8th of August, first thing. The rest of the 16 days? You’re looking at a whole lot of flat, blown-out, or just plain tiny waves. If you’re desperate, that Saturday morning has a chance, but don’t expect much else.

Rusty.

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