Rock Island Surf Forecast and Surf Report

Alright, folks, Rusty here. Let’s get straight into it.

The next couple of weeks are a real mixed bag for our stretch of coast. We’re looking at a long, slow grind of tiny, junk surf before a genuine pulse of energy arrives late in the period. It’s going to test your patience, but there’s a window of proper, clean waves on the horizon if you’re willing to wait it out.

The first few days are pretty flat-out dismal. From Tuesday the 18th through Sunday the 23rd, we’ve got almost nothing but knee-high slop. Wave heights are hovering around 0.3ft to 2ft with short, weak periods. The energy is next to nothing (13 to 63), so it’s a board-shortener for sure. There are a few glassy mornings, but honestly, you’re just going to be floating around out there. The best you can say is that conditions are clean, but there’s no power behind any of it. It's not worth the paddle, really.

The quiet spell grinds on into the start of the following week, but you can feel something starting to build. On Monday the 24th, the swell starts to push up, reaching that 3ft to 4ft mark, but the period is long at 16 seconds, which is something. The energy jumps up to a moderate 492 to 836, and the breeze goes onshore, making it messy and lumpy. It’s still not good.

Things get properly chunky from Tuesday the 25th but stay poor in quality. Swell heights climb to 6ft to 7ft and the energy becomes strong (1756 to 2338). The wind is on or cross-onshore though, chopping it all up into a mess. This is a combo of size and bad conditions. It’s the kind of surf that gets your heart rate up but ends in frustration. It’s still all onshore junk.

Now, here’s where it gets interesting. The standout window is Thursday the 27th of August. The wind finally swings around to a cross-offshore, and we’ve got a solid 8ft of south swell with a 16-second period. The energy is massive at 2971, and it’s clean. Rock Island (Rock-Island) is the spot to be. For a reef break, this long-period south swell with that offshore wind is going to be proper. It’s a very powerful wave and the break is exposed, so it should be handling all that size well. This is one for experienced surfers only, the kind of day that reminds you why you put up with the flat spells. The south swell direction is right out of the optimum for the spot, and with that cross-off wind, it should be setting up some beautiful lines.

Right after that, Friday the 28th gets wild. The wind cranks up hard offshore, which sounds good, but it’s a severe gale and it’s bringing heavy rain. Not ideal. The swell is still solid at 6ft to 7ft, but trying to surf in a storm is a mission. I’d sit that one out unless you’re seriously kitted up for a battle.

The weekend takes another turn for the worse. Saturday the 29th sees the swell jump to a massive 10ft to 12ft with a short-period windswell. With the onshore breeze, this is a full-on closeout. That’s a lot of water moving and it’s going to be a messy, powerful beast. Not for the faint of heart, and likely too big and blown out for anyone.

Finally, Sunday the 30th brings redemption. The swell eases back to a still-chunky 6ft, and the wind goes light and offshore again, from the NNE. The energy is still strong at 1665. This is another classic day, with clean surf and that same solid south-southwest swell. It’s the kind of Sunday that’s worth clearing your calendar for. It won’t have quite the power of Thursday’s peak, but it’s going to be cleaner and more user-friendly. Rock Island will be breaking beautifully, as long as you’re comfortable with a bigger, more powerful reef wave.

The early part of the following week, Monday the 31st and into Tuesday the 1st, sees the swell fading but still holding at 4ft to 5ft with a decent period. The winds are offshore and clean, but the energy is dropping back to the moderate range. It’s still worthwhile surf for the more experienced crew, just not as memorable.

By Wednesday the 2nd of September, we’re back to the small stuff, with 2ft to 3ft waves. The wind is offshore and clean, so it's tidier, but the power is gone. That’s the end of the run. You get the feeling the ocean is taking a breather again.

So, bottom line: If you can, keep your schedule clear for the morning of Thursday the 27th of August. That’s the absolute pick of the pack. And Sunday the 30th is a solid backup. Everything else is a whole lot of "meh" with a bit of a storm season at the end of it. For a wave like Thursday’s, it’s worth the wait.

Signing off.

Rusty

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