Black Rocks Jetty Surf Forecast and Surf Report

Alright, grab your wettie, let's have a look at the next few weeks at Black Rocks Jetty. Tuesday morning is actually looking choice to start, with a clean 6ft SSW groundswell and glassy conditions. The water is cooking at 77°F, which is much warmer than normal for this time of year, so you might get away with a spring suit.

That morning session on Tuesday the 25th is the standout early in the period. The swell has some decent energy behind it (1007) and with the wind dead flat, it'll be as clean as it gets for an advanced reef break. By the afternoon, the wind swings cross-on and the quality drops off.

Wednesday the 26th holds a fun 5ft SW swell in the morning with clean cross-off winds, but it’s not as punchy as Tuesday. The real sneaky session is Wednesday afternoon—a 3ft SSW groundswell with a very long 18-second period (1185 energy). That kind of period will give you long, lined-up waves, perfect for the reef, but it might break a bit straight for the beach. Keep it on the point.

Thursday the 27th sees a big jump in size to 10ft SSW, but the wind is onshore in the morning and gets chunkier in the afternoon. That's expert-only territory and even then, it's messy.

Friday the 28th is just huge and blown out—12ft to 13ft with cross-shore winds. Unless you're on a gun and love chop, that’s more of a spectator day.

Saturday the 29th and Sunday the 30th both offer early glassy windows with 12ft and 7ft SSW swells respectively. Saturday morning at 12ft is big but glassy—if you’ve got the chops, go. Sunday morning at 7ft with the same glassy wind is actually the better call for most advanced surfers, as it’s still powerful but a bit more manageable.

Monday the 31st drops right off to 4ft and is pretty weak. From Tuesday the 1st of September through Thursday the 3rd, we’re in a flat spell. The swell drops below 3ft and the energy is minimal (under 100). You’d be fighting for scraps.

Then, on Friday the 4th of September, there's a weird little spike: a 3ft SW swell with a very long 21-second period (619 energy). That’s an odd one—long-period but small. It’s glassy in the afternoon, so if you’re a patient soul on a log, you might find a clean little runner.

The next real window opens up Saturday the 5th of September with a solid 6ft SW groundswell in the afternoon and glassy conditions. That’s your next standout—clean, punchy, and good energy (1477). Sunday morning the 6th is smaller at 4ft and the wind is onshore, so not as clean.

Monday the 7th of September morning is back to a clean 5ft SSW with glass—nice. But the real gem is Monday afternoon: a 7ft SSW groundswell with an 18-second period and zero wind. Glassy, long-period groundswell on the reef? That’s a setup for perfection.

Tuesday the 8th of September morning is still excellent with 8ft SSW and glass, but that’s getting big. Afternoon jumps to 12ft with rain and cross-on wind—messy.

Wednesday the 9th of September is a monster: 16ft SSW swell with a 18-second period in the morning and glassy wind. The finder says it might actually be too big for this break at that size. That’s for the big-wave crew only, and even then, it’s a call you make with caution. Afternoon drops to 15ft but still huge.

So the real standouts? Tuesday morning the 25th of August for that first glassy punch, and Monday afternoon the 7th of September for the long-period, glassy perfection. If you can only pick one, the 7th has the edge for wave quality.

This is a reef break that’s very consistent and exposed to the SW, so when it’s on, it’s on. But there’s a definite gap of flat days from the 1st to the 4th of September where you’ll want to find something else to do. Crowds at Black Rocks can be an issue sometimes, so get there early on the good days.

Stay safe out there.

Rusty

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