Shark Island (Cronulla) Surf Forecast and Surf Report

G’day, Rusty here. Look, I’m gonna level with you—this stretch from now through the middle of September is a real mixed bag, and you’ll need to pick your moments. The only proper standout window is the first Monday in September, and that’s a solid week away. Before that, it’s pretty ordinary, with a few days of small clean surf but nothing to get excited about. After that Monday, it fades again.

Let’s start with the good stuff. The first real recommendation is Friday morning, 28 August at Shark Island (Cronulla). We’ve got a 5ft SSE swell, period 11 seconds—that’s a proper groundswell, with good energy (700), and the wind is light offshore from the SW. That’s clean, lined-up waves on a reef setup. Water temperature is about average for this time of year, no real surprises there. The swell direction is SE, which is a bit off the optimum SSE, but it’s still working fine. For a Friday session, that’s the pick.

Friday afternoon turns ugly—wind swings SSE at 16 mph, cross-off but messy, and the swell drops to 5ft. Not worth it.

Saturday morning, 29 August is another chance—5ft SSE swell, 10-second period, light SSW cross-off wind. Clean, but the energy is moderate (620) and the period is shorter. It’ll be a fun, mellow surf, but not a standout. Saturday afternoon goes cross-shore and small.

Sunday morning, 30 August is clean with a 3ft S swell, 9-second period, offshore SW wind, but it’s weak (249) and small. Surfable, but ordinary.

Monday 31 August through to Saturday 6 September is mostly poor—small, weak, and often onshore or cross-shore. The swell drops to 1.0ft–2ft, period short, energy low. A few clean windows in there, like Thursday 3 September afternoon with offshore SSW wind, but it’s only 1ft. Not worth paddling for.

Now, Monday morning, 7 September—this is the big one. Shark Island gets a 8ft S swell, period 11 seconds, and the energy is massive (1261). The wind is offshore from the SW at 16 mph, keeping it clean and lined up. That’s a solid groundswell, and on a reef break like this, it’ll be offering some proper waves. It’s right at the edge of the optimum swell direction (SE) but the S direction is still excellent. This is only for advanced surfers—8ft is getting big, and with that period, the sets will have some punch. Monday afternoon drops off, with cross-shore wind and marginal conditions.

After that, Tuesday 8 September morning is clean with a 4ft S swell, light WNW cross-off wind, and moderate energy (355). It’s a good session, but nothing like Monday. The rest of the week fades to small, choppy, and poor.

So, the standout is clear: Monday morning, 7 September at Shark Island. That’s your best bet. Everything else is either too small, too windy, or just average. If you can’t make that Monday, the Friday and Saturday mornings before are your next best, but they’re not in the same league.

Rusty.

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