Shark Island (Cronulla) Surf Forecast and Surf Report

G’day, Rusty here. Let’s be straight with you – this outlook for Shark Island (Cronulla) is a real mixed bag. It’s mostly a waiting game, with a few windows that could fire if you’re willing to pick your moments. The combined swell energy is weak to moderate for the most part, but there’s one standout that could be worth circling on the calendar.

First up, Wednesday the 9th is a write-off. The morning has clean conditions thanks to a cross-offshore wind, but the swell is a tiny 3 ft from the south at 8 seconds – not enough to bother. By the afternoon, it jumps to a messy 10 ft from the SSE, but with a 28 mph south wind, it’s just a washing machine. No good.

Thursday the 10th shows some pulse. Morning sees 8 ft from the south at 9 seconds, and the energy is up around 1073 (moderate to strong). Wind is cross-off from the SSW at 16 mph, leaving it clean. The tide or other factors keep it marginal, but for an advanced crew on this reef, it’s the best of the early run. Afternoon holds similar size at 8 ft and 1013 energy, but the wind swings more southerly – still cross-off, still clean.

Friday the 11th drops back. Morning is 6 ft from the SSE (545 energy), clean with a gentle breeze, but it’s a marginal call. Afternoon sees 5 ft with a light cross-shore from the SE – small, cleanish, but nothing special.

Saturday the 12th and Sunday the 13th are poor. Swell drops under 3 ft through the weekend, and winds are onshore or cross-onshore. The energy plummets – down to 128 on Sunday. Not worth the paddle.

Monday the 14th and Tuesday the 15th stay poor. Tiny swells, onshore winds, and energy in the doldrums (30 to 162). Tuesday afternoon has a 7 ft spike from the SSE but with a stiff cross-off wind and period of only 7 seconds – that’s short-period windswell, sloppy and inconsistent.

Now, Wednesday the 16th morning is interesting. We’ve got 6 ft from the south at a juicy 13 seconds – that’s a solid groundswell, carrying 959 energy. Light cross-onshore wind from the north at just 3 mph, so it’s clean with small ripples. This long-period swell is best handled by a reef setup like Shark Island, where it won’t straighten out too much. It’s still a marginal score due to tide or minor factors, but for an advanced surfer, this is a real window. The afternoon goes to 5 ft but with a 16 mph onshore NE wind – poor.

Thursday the 17th and Friday the 18th are mostly forgettable. Swell under 3 ft, light winds, but energy is low (206 to 294). Friday morning has a very long 19-second period from the south – that’s an incredibly long groundswell, but with only 2 ft of swell height, it’s a tease. It’ll be super clean but barely breaking.

Saturday the 19th through Monday the 21st morning builds the real standout of the forecast. Monday the 21st morning is the one to circle. The swell jumps to 10 ft from the SSE at 10 seconds, and the combined energy is a massive 1624 – that’s strong to very strong wave energy. The wind is almost glassy from the north at just 3 mph, light cross-onshore, leaving it clean. For a reef break like Shark Island, that size (10 ft) is strictly for experts only – it’s too big for all but the most experienced. The period is average at 10 seconds, so it won’t be overly straight. This is the best on offer: a powerful, clean, big-swell day. It’s a week and a bit away (Monday, September 21st), so promising but keep an eye on it. The afternoon fades with a 19 mph onshore wind.

From there, Tuesday the 22nd through the end of the outlook (Thursday the 24th) drops right back. Swell stays around 4 ft to 5 ft from the NE or ENE, with periods of 6 to 7 seconds – short-period, weak energy (140 to 312). Winds are cross-off initially, but the swell direction is all wrong for Shark Island’s optimum (which likes SE). The last few days are poor and not worth the drive.

Overall, hold out for Monday morning the 21st if you’re an expert – that’s your moment. Thursday the 10th and Wednesday the 16th are backups for the advanced crew. The rest? Better off doing something else.

Rusty.

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