Siriu Surf Forecast and Surf Report

G’day, I’m Rusty, and I’ve been staring at the charts for Siriu. Let’s be straight with you—this month’s run is a bit of a slow burn at first, but there’s some real gold waiting if you’re patient. The water here is sitting at 66°, which is about average for this time of year, so no surprises there.

Right now, Wednesday the 29th is flat and messy—don’t bother. Thursday the 30th offers a tiny 2ft south swell with a period of 9 seconds, and while the morning has clean conditions with a light cross-offshore breeze, it’s barely surfable. You might get a knee-high dribble, but it’s not worth paddling out. Friday through Sunday stays weak and choppy, with onshore winds ruining any chance of decent waves. That’s about four days of nothing.

Monday the 3rd of August starts to flicker. The morning goes glassy with a 4ft swell from the northeast at 7 seconds. Combined wave energy is moderate at 221, and the conditions are clean—glassy surface. It’s nothing huge, but for a beginner-friendly break like Siriu, it’s a solid little session. The crowd factor is “sometimes,” so you might have a few mates out, but nothing crazy.

Tuesday the 4th is where we start to get excited. The morning is glassy again, with a 3ft south swell (11-second period) and a combined energy of 338—that’s moderate energy, but the period is long enough to give the waves some push. The water stays clean. Then Wednesday the 5th takes it up a notch: another glassy morning, 5ft from the northeast at 8 seconds, combined energy jumping to 456. This is proper fun-sized surf for everyone—not too big, not too small, and the offshore (NNW) wind keeps it tidy.

But the real standouts come later. Thursday the 6th, in the afternoon, glassy conditions meet a 7ft northeast swell (8 seconds) with a combined energy of 850. That’s strong wave energy. For Siriu, that’s a punchy, chest-to-head-high day with clean faces—perfect for anyone who’s comfortable in a bit of power. It pumps all afternoon. Then look at Tuesday the 11th: morning brings a 3ft south-southeast swell at 13 seconds, clean cross-offshore wind, and combined energy of 825. Wednesday the 12th is another cracker—glassy and clean, with 5ft from the south-southeast, long 12-second period, and combined energy 894. These are the kind of days where you want to clear your schedule.

If I had to pick the top two: Thursday the 6th afternoon (7ft, glassy, strong energy) and Wednesday the 12th morning (5ft, long period, clean). Both are standouts for quality and consistency. The swell direction from the east-northeast and south-southeast lines up nicely with Siriu being exposed to the east, so it’ll wrap in cleanly.

A quick heads-up: on Monday the 10th, the swell jumps to 8ft from the southeast with a short 7-second period, and combined energy hits 1451—that’s strong stuff. But it’s a cross-shore wind and the period is short, so it’ll be lumpy and tricky. That one’s for experienced surfers only, and honestly, it looks more like a kite-surfing day than a paddle session.

The long-range stuff into the second week—Thursday the 13th—still offers clean, waist-high fun with long-period swell, but the earlier days are where the magic is.

So, in short: suffer through the first few days, then get ready. The best surf arrives from Monday the 3rd onward, with absolute peak days on the 6th afternoon and the 12th morning. Save your energy for those.

Rusty.

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