Kewalos Surf Forecast and Surf Report

Alright, grab your board and wax. Let's get into it.

This is a real mixed bag ahead. The forecast starts slow, but there are a couple of windows worth paddling out for. The main player here is Kewalos, a reef set-up that demands respect. It’s a consistent spot, but it’s mostly for advanced crew, and it *often* gets crowded, so expect company.

The water temp is sitting at 81°, which is bang on average for this time of year. The combined swell energy gets some serious numbers later on, but the wind is the real story.

Friday the 4th kicks off with a 4ft S swell pushing through, but with a strong ENE breeze at 25 mph making it cross-off, it’s a scratchy session. The energy is moderate (1327). Not the best start.

Saturday the 5th sees a jump in size to 7ft from the E, with a period of 13 seconds. Still, that ENE wind at 19 mph holds it back. The energy is picking up (2382), but it’s not clean yet.

Sunday the 6th afternoon is where we start to see something. The swell hits 6ft from the SSW, and the wind drops to 12 mph from the E, still cross-off. The energy jumps to 3434. It’s a solid step up, but the risk of thunderstorms makes it a gamble.

Now, Monday the 7th is a tale of two halves. The morning is okay, with a 8ft SW swell (14 sec period) and cross winds from the ESE at 12 mph. The energy is pumping at 3868. But the afternoon turns ugly. The swell hits 10ft from the SW, with a very long period of 15 seconds. That’s expert territory. The wind swings onshore from the SE at 19 mph, and the energy goes super strong at 6174. This is gonna be a messy, lumpy mess. A real beast, but not for paddling.

Tuesday the 8th is a write-off. Onshore wind all day, with a 6ft ENE swell. The energy drops to 1273. Hard pass.

Wednesday the 9th morning is the real standout. The swell drops to 3ft from the SSW, but with a very long period of 14 seconds. The wind turns light from the E at 6 mph, making it glassy. The energy is moderate (645). This is the cleanest window of the whole forecast. For a reef break like Kewalos, that long period groundswell will wrap in nicely. The small size and glassy conditions make it a dream for the advanced crew who know the lineup. This is the one to circle.

From Thursday the 10th through to Saturday the 13th, it’s a long stretch of ENE winds at 19-22 mph, with chop from 5ft to 7ft. The periods are short (7-8 seconds), so it’s weak, wind-affected junk. The energy is low (under 1000). Not worth it.

Sunday the 14th onwards into the second week, the conditions are marginal at best. The swell bounces around, but the wind remains a stiff cross-off from the ENE. The best of the second week is Wednesday the 16th, where a 3ft SSW swell with a very long period of 18 seconds shows up, with moderate energy (1127). The wind is still 22 mph, so it’s bumpy, but the long period gives it some shape. A long shot for the committed.

Overall, the Wednesday morning, September 9th is the golden ticket. Small, glassy, and clean. Get it while it’s good.

- Rusty

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