Nanakuli Blackrocks Surf Forecast and Surf Report

Alright folks, Rusty here. Let’s look at what’s cookin’ for our stretch of coast over the next couple of weeks.

We’ve got a bit of a slow start, but don’t write it off just yet. The first few days are small, but the wind is offshore and the water is glassy clean. The real story is building towards the middle of next week, where a nice pulse of south swell is set to push through, bringing the best waves of the whole period.

Right now, the first recommendation is for Nanakuli Blackrocks on Wednesday afternoon, August 5th. The swell is a tiny 2 ft out of the SW, but with a very long period of 15 seconds, it’s got that groundswell energy. The wind is a light offshore breeze from the ENE, so the surface will be smooth. The water is sitting at 81°, which is pretty much bang on average for this time of year – no surprises there. The combined energy is weak (147), so don’t expect much push, but it’s a surfable wave.

Through Thursday and Friday, the 6th and 7th of August, things stay small, with the same 1 ft to 2 ft range. The wind stays offshore, keeping it clean. The energy is still low, bouncing between 102 and 189. It’s a good time to get the log out and work on your cross-step, but it’s not going to bowl you over.

The weekend of August 8th and 9th sees a bit more energy, with the combined swell pushing into the 200s and 300s, but the wave heights are still only 2 ft to 2 ft. The wind is a moderate offshore breeze, which is still clean. The Sunday morning session on the 9th is the first time the forecast notes “expect good surf conditions,” but the size is still marginal.

Now, the standout. Monday, August 10th through to Wednesday, August 12th is where it gets interesting. The swell starts to build, hitting 3 ft on Tuesday morning, August 11th, with a perfect 14-second period. The wind is light and offshore, making for some really clean, fun waves. The combined energy climbs to 355.

But the real winner is Wednesday morning, August 12th. We’ve got a 4 ft SSW swell with a very long 18-second period, and the offshore wind is solid. The combined energy surges to a powerful 1047 – that’s serious grunt in the water. This is the best the entire forecast has to offer. The wave direction is a solid south, which is what this spot loves. The water is still warm, the wind is offshore, and the sets will have real push. Because the period is so long, those waves will be more walled up, which is fine for a reef-like spot like Blackrocks.

After that peak, the swell holds through Thursday and Friday, August 13th and 14th, with 4 ft waves, but the wind starts to pick up to 19 mph, making it choppier. The energy drops back into the 500s and 800s. It’s still surfable, but the quality is falling off.

The second week from August 15th onward drops off considerably. The swell backs down to 3 ft and smaller, and the wind stays fresh from the ENE, blowing 19 to 22 mph. The energy dips into the 200s. It’s not great, but on Tuesday morning, August 18th, the forecast calls for “good surf conditions” again, with a 2 ft south swell and moderate offshore wind. It’s a blip of hope in an otherwise quiet run.

One thing to keep in mind: this break is listed as “rarely breaks,” so when it does, it’s a bit of a treat. The crowds are listed as “sometimes,” so you might have a few others in the water, but with the small sizes early on, it shouldn’t be too hectic.

So, my call: Wednesday morning, August 12th is the absolute standout. If you can only paddle out once in the next two weeks, make it that session. The swell is solid, the wind is offshore, and the energy is pumping. The days leading up to it from the 10th are also very good, especially Tuesday the 11th. After that, it’s a slow fade, with a tiny chance of a decent wave on the 18th.

Rusty out.

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