Nanakuli Blackrocks Surf Forecast and Surf Report

Alright, grab your board. It’s been quiet, but things are starting to wake up. We’re looking at a solid run of small but clean surf coming through, with a few standout windows that are worth circling on the calendar. The water is sitting at 81°F, which is pretty much bang on average for this time of year, so no surprises there.

The first real call is Monday morning the 17th. Overnight, a nice little southerly groundswell pushes in at 3 ft and 14 seconds period. That’s a long period, which means proper energy and those longer waits between sets. The wind is offshore from the ENE at 12 mph, keeping things tidy. The combined energy sits at 383 (moderate), so it’s not a cannonball, but it’s got enough grunt. Monday afternoon holds the same energy with a gentler breeze at 9 mph. Nanakuli Blackrocks is the spot, and it’s exposed to that SSW swell direction. This break is a rare one, so seeing it line up like this is a treat. Just a heads up: it can get crowded sometimes.

From Tuesday the 18th through Wednesday the 19th, the swell drops a little, with waves around 2 ft to 2 ft. The offshore winds stick around, but the energy dips into the 140s and 160s (weak to moderate). The waves are surfable, but ordinary. You’ll get a wave, just don’t expect much push.

Then we hit the true standout. Thursday the 20th morning, the swell holds at 2 ft from the SW, period jumps to 18 seconds, and the combined energy climbs to 316 (moderate). The wind is light from the east at 6 mph. But the real magic is Thursday afternoon: glassy, with a light ESE breeze at just 3 mph. That’s as clean as it gets. Friday the 21st and Saturday the 22nd are looking even better, with glassy conditions, zero wind, and the swell holding at 3 ft with periods of 16-17 seconds. The combined energy sits around 395 (moderate) each session. This is your best window for the whole forecast. Clean, consistent, and that long period groundswell is going to give you some nice, lined-up waves at Blackrocks. It’s a reefy spot, so that long period energy will wrap in nicely.

Sunday the 23rd stays clean with offshore winds, but the swell ticks back to 2 ft. Still good, but the energy drops a touch to 324. The following week, from Monday the 24th through Saturday the 29th, the surf gets smaller and more inconsistent, with waves mostly in the 2 ft to 2 ft range. The wind is offshore, but the energy is low, often in the 100s (weak). There are a few sessions on the 25th and 26th that have a bit more energy, around 286 and 367, but nothing that’ll blow you away.

The second week shows a bit of promise again. Sunday the 30th has a pulse of 3 ft from the SSW with 16 seconds period and 330 energy (moderate), but the wind is fresh at 19 mph, which could make it a little bumpy. Monday the 31st brings a bigger energy spike—558 and 670 (strong)—with a 3 ft swell. The morning is from the SSW, the afternoon switches to a W swell at 17 seconds. That’s a long way out, so treat it as a promising but less certain call. Could be a cracker, but we’ll have to wait and see.

Overall, the standout is that Thursday the 20th through Saturday the 22nd stretch. The glassy conditions, the long period groundswell, and the moderate energy all line up. Get out there and enjoy it.

Rusty

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