Black Rocks Jetty Surf Forecast and Surf Report

Alright, let’s get into it. The forecast is shaping up nicely for Black Rocks Jetty, a reef break that’s very consistent and exposed to the southwest swell. This spot is for advanced surfers only, and it’s going to be pumping. The water is sitting at 77°, which is a touch warmer than normal for this time of year – a nice bonus.

The action kicks off on Wednesday morning, the 12th of August. We’ve got a clean 4ft SW swell rolling in with a period of 14 seconds, and the wind is absolutely glassy. The wave energy is moderate (650). It’s a solid start to the run.

Wednesday afternoon stays clean with a light S breeze, still glassy, with a 4ft SW swell. The energy is a touch stronger (658). The quality holds through Thursday, with glassy mornings and afternoons, the swell staying around 4ft to 4ft from the SW and periods of 12 to 13 seconds. Energy is moderate (363 to 525).

Now, Friday morning, the 14th of August, is where things start to get serious. The swell jumps to 6ft from the SSW, period of 13 seconds, and it’s glassy. The energy is strong (1175). This is excellent surf for experienced surfers, but it’s getting a bit punchy for beginners. The afternoon sees a shift, with a cross-on wind from the SSE, which makes it a bit marginal, but the swell is still solid at 5ft.

Hold onto your board for Saturday, the 15th of August. This is the standout period. The morning brings a 6ft SSW swell with a very long period of 20 seconds – that’s serious groundswell energy. The wave energy is very strong (3936) and it’s glassy. This is a reef break, so that long period swell will be a dream. The afternoon is even better: a 7ft SSW swell, period of 18 seconds, and the wind is dead calm, glassy. The energy is massive (5036). This is exceptional, expert-level surf. The only caveat is that this size is strictly for the pros.

Sunday the 16th is still pumping with an 8ft SSW swell in the morning (period 16 seconds) and a 7ft in the afternoon. The energy is still very strong (3191 and 2510). The wind is glassy in the morning, but shifts to a light ENE breeze in the afternoon, still keeping it clean. This is still excellent for experienced surfers.

Monday the 17th sees the swell drop back to 4ft from the SW, but with a lovely long period of 16 seconds. The morning is glassy and the energy is moderate (1177). The afternoon gets a bit messy with a cross-shore wind from the SSE.

We get a bit of a lull from Tuesday the 18th through Thursday the 21st. The swell drops to 2ft to 3ft, with periods varying from 11 to 16 seconds. The winds are mostly glassy, but the energy is weak (360 to 610). The afternoon of the 20th and the 21st see onshore winds, making it pretty poor. That’s a few days of small, not-so-great conditions.

But don’t get comfortable. Saturday the 22nd of August sees a big return of swell. The morning brings a 8ft SSW swell with a period of 15 seconds, and the energy is strong (2482). The wind is glassy. The afternoon is even bigger, with an 8ft SSW swell, period of 14 seconds, and energy jumping to 3914. This is excellent for experts.

Sunday the 23rd is still solid, with 8ft and 7ft SSW swells, but the morning has a light cross-shore wind. The afternoon turns glassy again. The energy is strong (1464 to 1920).

The run continues through Monday the 24th of August with a 5ft SSW swell in the morning, and a 4ft in the afternoon. The wind is a bit cross-on in the morning, but cleans up to glassy in the afternoon. Tuesday the 25th is a beauty, with a consistent 7ft SSW swell, period of 16 seconds, and glassy conditions all day. The energy is strong (1957 to 2065).

The final push is on Wednesday the 26th and Thursday the 27th. Swell holds at 5ft to 6ft from the SSW, with periods of 14 seconds. The wind is mostly calm or light offshore, keeping the waves clean. The energy is moderate to strong (1034 to 1383).

The best on offer: Saturday the 15th of August is the true standout. The combination of a 7ft SSW groundswell with a very long period (18-20 seconds) and dead calm, glassy conditions is as good as it gets. The energy is massive (5036). This is a rare, special day for the experts. The second standout is Saturday the 22nd of August, with another big 8ft SSW pulse and glassy wind. It’s a close second. Expect crowds to be possible at this spot, especially on these days, as it’s a known performer.

-Rusty

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