Thirroul Surf Forecast and Surf Report

G’day, it’s Rusty here.

Honestly, the next week and a half is looking pretty grim for a paddle. We’ve got a run of small, messy, onshore slop that’s going to have you fighting chop more than catching waves. Thirroul is exposed and it’s copping it from the southeast and south, with short-period windswell in the 6-8 second range. Energy is weak to moderate (126-352) and it’s just not worth getting wet for. The water temp is 64°F, which is about average for this time of year, so at least you won’t be freezing while you watch it close out.

The gap from now until the 19th is basically a write-off. There are a few knee-high blips, but nothing with any push. The first real sign of life shows up on Wednesday the 19th morning – a clean, glassy 2ft of southeast groundswell with a 10-second period, and only 162 units of energy behind it. It’s surfable, but don’t expect much. That’s a proper inside day for a longboard.

Things stay small and messy through the 20th and 21st, with winds going sideways and energy dropping right off to around 53-75. The 22nd looks terrible – just 1ft and weak. Then we get a little pulse on Sunday the 23rd. There’s a bump of south swell pushing to 5-6ft with a better 9-10 second period and the energy jumps to 393 and 739. The morning is still a bit cross-onshore, but the afternoon cleans up with light easterly wind. That’s the first day that’s genuinely worth a look, even if it’s a bit raw.

Now, here’s the real standout – keep your eyes on Tuesday the 25th of August. That’s the one. Early morning at Thirroul is looking excellent. We’ve got a solid 11ft of south swell with an 11-second period, and the energy is massive at 4681. The wind is light and cross-offshore from the north, meaning it’s going to be clean and lined up. This is a proper sized groundswell for experienced surfers only – way over the 8ft mark. The afternoon drops to 8ft but the wind swings more onshore and it gets shifty, so get on it early. If you’re not experienced, sit this one out.

The 26th still has solid 8ft south swell, but the northeast wind picks up and makes it cross and choppy. Not the same quality. The 27th backs off to 5-6ft from the SSE, and the afternoon gets a nice west-northwest offshore, which means clean, fun, and far more manageable. That’s a solid follow-up day for the slightly smaller crew.

Then Friday the 28th morning looks like a gift. Glassy conditions, 5ft of southeast groundswell at a nice 10-second period, and energy at 509. That’s a clean, punchy morning. After that, it fades out and goes messy again into the 29th.

So the summary? The 25th morning, Tuesday, is the big game. Big, powerful, clean south groundswell. The 27th afternoon is your next best bet for something clean and moderately sized. And keep an eye on the 28th morning – that glassy period is a sneaky good one.

Stay safe out there, it’s going to have some size.

Rusty.

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