Thirroul Surf Forecast and Surf Report

G’day, Rusty here. Let’s have a look at what’s on the cards for Thirroul. It’s a bit of a mixed bag over the next couple of weeks, with some real flashes of quality tucked in amongst some pretty ordinary spells, so you’ll need to pick your moments. The water temp is sitting at 64°, which is pretty much spot on for this time of year – nothing unusual there.

The first decent chance doesn’t come until Monday the 7th of September. The morning is the pick, with a glassy 2ft south swell pushing in with moderate energy (359). The wind is dead calm, so it’ll be clean. The period is only 9 seconds, so it’s a bit of a short-period windswell, not a deep groundswell, but for a Monday session it’ll be worth a paddle. By the afternoon, the onshore wind kicks in and it turns ordinary again.

Tuesday the 8th of September sees a jump in size, with 8ft south swell early, but a strong cross-shore wind chops it up. The energy is strong (1547), but the quality is not there. That’s more of a kite-surfing setup than a clean paddle session.

Then we hit a real standout. Friday the 11th of September morning delivers. We’ve got 6ft of south-southeast swell with a 10-second period, moderate to strong energy (720), and glassy conditions with a light northerly breeze. That’s clean, lined-up surf at a pretty consistent spot. Thirroul is a beach and reef setup, exposed to the south, and with that swell direction (SSE) it’s right in the wheelhouse. Crowds can be around sometimes, but for a Friday morning with this quality, you might find a few locals out. This is the best on offer for the whole run.

After that, the size drops away. Sunday the 13th of September morning has 3ft SSE groundswell with a long 11-second period and a light offshore wind – clean, small, and a good chance if you’re on a log. Energy is low (237), but it’s tidy.

Then there’s a quiet gap from Monday the 14th through to Tuesday the 15th – just tiny 1ft to 2ft waves, barely worth wetting a suit.

Everything changes from Wednesday the 16th of September onwards. A big pulse arrives: 10ft south swell by Wednesday morning, building to 12ft on Thursday, and peaking at 12ft to 10ft through Friday the 18th, with very strong energy readings (1927 up to 4310). This is serious size – over 8ft, so expert-only territory. The swell direction is SSE to SE, with a long period (11 to 14 seconds), which is a proper groundswell. For a beach and reef setup like Thirroul, that long-period groundswell can break a bit straight on the beach, but the reef might handle it. Thursday the 17th of September afternoon has an onshore wind, but Friday the 18th morning has a cross-offshore wind – that’s your window for clean, heavy waves if you’ve got the skills. Just be aware, around the 20th of September the cross-onshore wind chops it up again.

So, the standout is Friday the 11th of September morning at Thirroul – 6ft SSE swell, glassy, clean, and consistent. The big stuff around the 16th to 18th is for experts only. Pick your days.

Rusty.

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