Rock Island Surf Forecast and Surf Report

G’day, Rusty here. Alright, let’s talk about Rock Island. To be straight with you, this 16-day window kicks off with a real struggle. The first solid week is basically a write-off for decent waves. We’re looking at small, junky swell and a whole lot of wind issues.

From Thursday the 3rd right through to the middle of next week, it’s grim. We’ve got onshore winds, rain, and tiny swell. The combined wave energy is pitiful – barely scraping into triple digits at its best (103). The water temp is sitting pretty average for this time of year, nothing to write home about.

Friday the 4th does give us a brief flicker of hope with some offshore wind in the morning. Winds are light and clean from the NNE, but the swell is tiny at 2 feet from the south. It’s ‘surfable but very ordinary’ – you’d be on a longboard, if anything. The energy is a weak 85, and it’s inconsistent. Still, that clean surface is the only saving grace this week.

We get a few more clean mornings with offshore winds from the 5th through the 7th, but the swell stays small and weak. By Monday the 7th, we’ve got a moderate offshore breeze but the swell is only 3 feet from the SSE with energy at 76. Short period too, around 7 seconds. Not worth paddling out for.

A big pulse of south swell hits around the 8th and 9th, jumping to 5 feet and then 10 feet on Wednesday the 9th! The combined energy rockets up to 2,172 – that’s serious power. But here’s the kicker: it’s accompanied by howling onshore SSW winds at 28 mph. The conditions are just poor, raw, and unsurfable. That 10-foot south swell with a 11-second period would be a beast if it cleaned up, but it’s not gonna happen. Thursday the 10th is similar – solid 7-foot swell but locked in onshore.

After that stormy mess passes, we finally see a classic setup forming for the very end of the forecast. Friday the 11th gives us a small reprieve with clean offshore NNE winds and a modest 3-foot south swell. Energy is 155, period is short at 8 seconds. It’s fun for a grovel but nothing special.

The real standout, and the only time I’d get genuinely excited, is Thursday the 17th of September. We have a glassy morning with barely a breath of wind – that’s a major positive. The swell is a clean 3 feet from the south, but with a massive 14-second period. That’s proper groundswell, long and lined up. The combined energy is 437 – solid moderate wave energy. Rock Island is a reef break that handles that south swell direction perfectly, and with those long-period waves it’s going to produce some beautiful, well-shaped lines. This one is worth marking in your calendar. Crowds are possible here, but for waves this good, you’ll cop it.

Friday the 18th also looks promising – a clean 4-foot SSE swell with a 15-second period – very long period. Energy jumps to 1,057, so there’s plenty of push. Winds are light cross-offshore from the NE, keeping it clean. This is a close second to Thursday.

So, bottom line: suffer through the first week of wind and small junk. The big swell mid-week is a no-go. The true standout is Thursday the 17th of September at Rock Island. Glassy, long-period south swell, and a reef setup that will handle it beautifully. Friday the 18th is also a ripper.

Rusty.

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