Waimea Rivermouth Surf Forecast and Surf Report

Alright folks, Rusty here with the full rundown on what’s coming our way for the next couple of weeks. It’s a bit of a mixed bag, but we’ve got some real gems if you pick your windows right.

We’re looking at a pretty slow start with only small, ordinary waves through the first few days. The real action doesn’t fire up until the second week, so if you’re itching for a paddle, you’ll need to be patient.

Let’s start with the first decent surf. On Monday morning, August 3rd, Waimea Rivermouth will see a small 5 ft swell from the east, with a short 8-second period. The real winner here is the glassy conditions – with a light ENE breeze of just 3 mph, it’ll be clean as a whistle. The water temp is about average for this time of year, so no surprises there. The combined swell energy is a weak 277, so don’t expect any power, but it’s a fun, mellow start for the beginners out there.

The rest of that week really fades out. From Tuesday morning through to Friday, we’re looking at tiny waves, mostly around 1 ft to 2 ft, with periods ranging from 8 to 16 seconds. The energy is low, between 66 and 108, and conditions are often glassy or clean, but there’s just not enough push to get excited about. There’s a tiny spike on Wednesday morning with a 3 ft easterly swell, but it’s still weak.

A bit of a jump happens on Saturday morning, August 8th. The swell picks up to 5 ft from the east, though the period is still short at 7 seconds. The combined energy bumps up to 318, and with a cross-off wind, it’s clean. It’s still not a standout, but it’s a solid option for the weekend.

Now, here’s where it gets interesting. The real standout period starts on Wednesday, August 12th. Waimea Rivermouth (Big Island) is going to light up. Wednesday morning brings a 3 ft south swell with a very long 18-second period. That’s proper groundswell, folks. The combined energy is a strong 909, and with a light ENE breeze at 9 mph, it’s going to be clean. This is the kind of swell that lines up beautifully at a river mouth, offering long, drawn-out waves. The afternoon gets even better: the swell pushes to 4 ft from the south, period drops to 17 seconds, but the energy climbs to 1046. That’s excellent, powerful surf. This is the best session on offer, but it’s for experienced surfers only – the size and power will be too much for beginners.

Thursday and Friday, August 13th and 14th, keep the south swell running, with waves around 4 ft to 4 ft and periods of 15 to 16 seconds. The energy stays strong (between 885 and 1150), but the wind picks up to 12 mph, making it a bit cross-off and choppy. Still very surfable, but not as clean as Wednesday.

Then comes another cracker. Saturday morning, August 15th, delivers a 3 ft south swell with a 15-second period, and the energy is a massive 1112. The wind is a gentle 9 mph from the ENE, keeping it clean. This is another excellent window for experienced surfers. The afternoon is just as good, with a 4 ft south swell and 16-second period, energy at 1078.

Sunday, August 16th, and Monday, August 17th, see the swell ease off a bit, with waves around 3 ft to 3 ft from the south and then west. The energy is still strong (between 782 and 938), and conditions remain clean. It’s a solid finish to the run.

The one true standout is Wednesday, August 12th, afternoon session. That south groundswell with 17-second period, combined with light winds and excellent energy, is the best we’ll see. The Saturday morning session on August 15th is a close second.

Remember, the long-range stuff is promising but not set in stone. Get out there and enjoy it.

Rusty.

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