Waimea Rivermouth Surf Forecast and Surf Report

Alright, mates, let's get into it. We're looking at a solid stretch ahead for Waimea Rivermouth. The water's sitting right around 81°, which is bang on average for this time of year, so no surprises there.

The action kicks off Wednesday morning, August 12th, with a gorgeous, clean 3-foot south swell rolling in at a very long 18 seconds. That's pure groundswell energy, and with light cross-offshore winds, it's going to be a beauty. The combined energy is a solid 959, so there's plenty of push. This is the standout session for the whole forecast. The swell direction is right on the money for this spot, and the setup is clean as a whistle. A perfect morning for a longboard or a fun shape.

We get a bit of a bump that afternoon, up to 4 feet, with the same long period and offshore winds. It's excellent for experienced surfers, but still a lot of fun for anyone comfortable in the water. That quality carries through Thursday morning, with 4 feet of south swell and 16-second periods, still clean. Thursday afternoon backs off just a touch but stays tidy.

Friday holds in the 3-4 foot range, with the swell period dropping a bit into the 14-15 second zone. Still clean, still cross-offshore. The energy is moderate, in the 700-800 range. Good, workable waves.

Then Saturday, August 15th brings a shift. The morning sees a 6-foot easterly swell, but with a short, weak 8-second period. The energy is still moderate at 676. The afternoon, however, is the real story: 7 feet of east swell, jumping to 10 seconds and a combined energy of 1049. That's moderate to strong energy, and with clean cross-offshore winds, it's going to be a powerful, punchy wave. This is expert territory at that size, but for the crew who can handle it, it's a proper session.

Sunday, August 16th gets messy. A risk of thunderstorms, winds picking up to 15-22 mph, and the energy drops to 353-497. The surf is small and just not worth it. That continues into Monday with onshore winds and a cross-chop. We're looking at a few days of ordinary, small, or blown-out conditions through to Tuesday, August 19th.

Things slowly start to clean up again from Thursday, August 20th, with a new, longer-period swell from the south-southwest. The swell is small, 1-2 feet, but with glassy to clean conditions, it's a fun little window for a mellow session. The energy is weak, around 139-205.

The second week really finds its groove from Sunday, August 23rd onward. A building south-southwest groundswell, with periods in the 15-16 second range, and light, clean winds. The swell sits around 3-4 feet, and the combined energy climbs back into the moderate 500-700 range. It's consistent, it's clean, and it's a great run of surf for anyone wanting a long, mellow paddle. This is a promising stretch, but keep in mind it's a week and a half out, so we'll keep an eye on it.

The absolute standout is Wednesday morning, August 12th – that 3-foot, 18-second south groundswell with light cross-offshore breeze is as good as it gets. The Saturday afternoon, August 15th offers a powerful, expert-level wave for the brave.

Rusty.

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