Porthtowan Surf Forecast and Surf Report

Hey crew, Rusty here. Let’s get into the Porthtowan outlook. The first part of the week is a no-go – poor surf and bad wind, so there’s a real dry spell until later on. Water temp is about 64°F, which feels a touch warmer than normal for this time of year.

The one to get excited about is Saturday, September 5th. The morning is the real deal. Glassy conditions, a slight breeze, and a clean 5ft swell from the WNW. That’s a proper long-period groundswell at 12 seconds, giving you those long lulls but real push when the sets come through – combined energy is moderate (559). Perfect size for this beginner-friendly spot, and it’s fairly consistent. Expect a crowd though, as it often gets busy. The wind is light offshore from the SE, so the surface will be like a mirror. The afternoon stays glassy with 4ft waves from the W, but the morning wins.

Sunday September 6th is a big drop – swell down to 2ft and clean but tiny. Not worth suiting up.

Then it gets wild on Monday September 7th. A big pulse of energy – combined energy reading a massive 1472 and 1633 – but it’s messy. We’re looking at a 8ft to 8ft swell from the W with an 11 to 12-second period, but the cross-onshore wind and chop make it poor quality. That’s for experts only, and even then, it ain’t pretty.

The rest of the run is slim. There’s a modest bump on Monday September 14th with a 5ft W swell and a long 11-second period, but the cross-onshore wind keeps it choppy and poor. Energy is moderate (638). After that, the waves just get small and weak – mostly 2ft or less with onshore breezes. The final days are flat and not worth your time.

So the takeaway: Saturday, September 5th morning is the standout. The rest of the 16-day window is a mixed bag of blown-out swell and tiny dribble. Don’t pin your hopes on anything else.

Rusty.

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