Rosa Surf Forecast and Surf Report

G’day, Rusty here. Let’s break it down. Over the next two weeks at Rosa, it’s a real mixed bag. The water’s running about 64°F, which is a touch cooler than average for this time of year, so you might want a thicker suit.

The first real session to mark on the calendar is Wednesday morning, September 9th. It’s completely glassy, hardly a breath of wind, and there’s a clean 4ft south swell with a 10-second period. The combined energy is 540, so it’s got some life to it. The light offshore from the west will keep the faces tidy. That’s your best morning of the early run.

Thursday the 10th, the swell backs off a hair, but the period stretches to 12 and even 14 seconds, which means more powerful, lined-up sets. The wind is light cross-on, so it’ll have a bit of texture, but there’s still some fun to be had if the banks are holding.

Then Friday the 11th turns ugly. The wind goes cross-shore and builds, the swell gets junky, and by the afternoon it’s poor with a chance of thunderstorms. Saturday the 12th is a different beast—the swell jumps to 8ft to 8ft from the south, and the energy readings jump to 1045 and then 2120. That’s serious, heavy water. The wind is cross-off and it’s clean, so for the advanced crew, this is the most powerful, exciting window of the whole forecast. But at that size, it is strictly for experts. If you’re not comfortable in solid surf, give it a wide berth. Sunday the 13th is a soggy downgrade with rain and onshore wind—not worth the paddle.

Heading into the second week, it’s all about patience. There are some cleaner moments, like Tuesday the 15th with a cross-off and 6ft to 5ft of swell, but it’s never really epic. The period stays short, and the winds keep messing with the surface. The best long-range bet is Saturday morning, September 19th. It’s glassy again, with a 6ft swell from the ENE and a combined energy of 401. It’s not the biggest, but with that clean, smooth water, it’ll be the most enjoyable, user-friendly session of the back half.

After that, it fades. The energy drops, the periods get short and weak, and the wind is mostly onshore or cross-on. The morning of Tuesday the 22nd has a clean look with a 5ft swell and a cross-off, but it’s just a decent session, not a standout. The end of the run is messy with fresh winds, so you’re better off waiting for the next pulse.

So, to sum it up: Wednesday morning the 9th is your pick for clean, glassy conditions. Saturday the 12th is the one for experts—big, powerful, and still clean. And if you want a more relaxed surf, Saturday the 19th is your best bet. The rest is a grind, but that’s how it goes. The ocean always turns around, so stay sharp.

Rusty.

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