Nanakuli Blackrocks Surf Forecast and Surf Report

Alright, this is Rusty, and I’m lookin’ at what’s on offer for Nanakuli Blackrocks over the next couple weeks. It’s a bit of a mixed bag, but we’ve got a window of clean, fun waves if you know when to go.

First thing you gotta know – this break is exposed to a SSW swell, and our optimum direction is WSW. So we’re getting a decent angle on the swell, but it’s not dead perfect. The water temp is sitting at 81° right now, which is pretty much spot on average for this time of year.

Right off the bat, we’ve got a run of surf starting Sunday morning, September 6th. We’re looking at a 3ft SSW groundswell with a long 16-second period. That long period is gonna mean some good shape and energy – the combined energy is sitting at a moderate 943. The wind is offshore from the East at 12 mph, so it’s gonna be clean. This is a good, solid start, but the spot “rarely breaks,” so conditions have to line up, and they are here.

Sunday afternoon the swell jumps to 6ft from the same direction, period drops a bit to 12 seconds, but we’ve still got offshore wind. The energy is moderate at 825. The surf is good, but with that rare consistency, you gotta be ready.

Monday the 7th sees the swell building to 7ft and then 8ft in the afternoon from the SW. That’s getting into the expert-only zone – over 8ft is not for the faint of heart. Wind switches to a cross-offshore, and the combined energy spikes hard – we’re talking 2568 in the morning and a whopping 3502 in the afternoon. That’s strong to very strong energy. But the conditions are marginal, so it’s more of a raw power day.

Tuesday the 8th is a write-off. The swell drops to 7ft and then 5ft, but the wind goes cross-onshore and cross-shore, making it choppy and poor. Not worth paddling out.

We get a bit of a reset from Wednesday the 9th through to Thursday the 10th. Swell drops to a clean 3ft to 2ft, with long periods (13-18 seconds) and consistent offshore or cross-offshore winds. The energy is lower – in the hundreds – but the conditions are clean. It’s small but fun for a longboard.

From Friday the 11th all the way through to the end of the forecast on Monday the 21st of September, the pattern is mostly small, clean, and consistent. We’re talking 1ft to 4ft of swell, with the highlight being the weekend of the 19th and 20th where we see 4ft from the SSW with 16-second period and steady offshore winds. The combined energy sits around 500-700, so moderate. That’s your best bet for a clean, fun session without getting hammered.

The real standout, though, is Wednesday the 16th and Thursday the 17th. We’ve got 3ft to 3ft of SSW groundswell with 18 and 16-second periods, moderate energy (465-577), and clean offshore wind from the ENE. It’s not big, but it’s quality. That’s the window I’d be aiming for.

If the wind gets messy on the bigger days, this setup looks more interesting for the kite crew than paddle surfing, especially on the 7th and 8th.

Alright, that’s the long and short of it for Nanakuli Blackrocks. Stay patient, watch the wind, and get it when it’s clean.

Rusty.

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