Sakawa River Surf Forecast and Surf Report

Alright, let’s get into it. Over the next 16 days, the Sakawa River (Sakawa-River) is the only break on the cards, so this is a one-spot story. The first few days are pretty lackluster, but there’s a real pulse of energy building for late in the window. The water temp is around 80.1°F, basically spot on for this time of year, nothing weird there.

We kick off on Friday morning, August 21st, with tiny 1.6ft swell from the south, a short 9-second period, and the combined swell energy is weak at only 74. The cross-onshore wind is light but it’s messing things up, so it’s pretty flat and bumpy. That theme carries through Friday afternoon, same size, wind picking up to 9 mph, no good.

Saturday morning, August 22nd, we finally get a moment: the swell is still just 1.6ft from the SSW, period at 9 seconds, but the wind goes glassy. It’s small and weak (energy 81), but glassy conditions mean you could scratch into a few clean if you’re desperate. Saturday afternoon, the wind swings and it’s back to poor. Sunday the 23rd offers some hope in the afternoon – same knee-high dribble, but another glassy window with a 13-second period on a 1.3ft SE swell. The energy is still weak (93), but that longer period gives it a little more push. Still, we’re talking ankle-biters.

Monday the 24th is where things get interesting. Morning sees a jump to 4.9ft from the SSE, with a very long 15-second period. The combined swell energy rockets to 1605 – moderate. The wind is light cross-onshore, so it’s not perfect, but that’s proper groundswell. This is a river break, so that long period should help shape up some nice lines. Afternoon holds at 5.2ft, 14 seconds, energy at 1782. This is the first real noteworthy session – not a stand-out, but a solid option for intermediate surfers.

Tuesday the 25th pushes bigger: 7.5ft in the morning, S swell, 15 seconds, energy at 2422. That’s strong wave energy. But the wind is cross-shore and light, creating a few ripples. The waves are getting meaty – pushing into the too-big-for-beginners zone. Afternoon hits 7.9ft, same long period, but the wind picks up to 12 mph from the SSW, cross-shore with a cross-chop, making it messy. That’s more for experienced, strong paddlers.

Wednesday the 26th drops back to 4.9ft in the morning, S swell, 13 seconds, energy 867, but the cross-shore wind is moderate and choppy. Afternoon gets worse with 3.9ft and 12 mph cross-winds. Not the day.

Thursday the 27th morning brings a shift: 3.3ft from the SSW, 11 seconds, energy 375, and clean cross-offshore wind. The waves are small but clean – a good session for a log or a fish. Afternoon goes back to marginal with cross-shore wind.

Friday the 28th has a 3.3ft S swell in the morning, clean again with cross-offshore wind, but only 184 energy and moderate wind at 12 mph, so it’s a bit blown out. Afternoon reverts to poor.

Saturday the 29th and Sunday the 30th are tiny – 1.3ft to 3.3ft – with weak energy and ordinary conditions. A gap of small, forgettable surf.

Now, the real standout is way out there. Thursday, September 3rd, is the one to circle. The morning kicks off with a massive 18ft swell from the ESE, an absurdly long 18-second period, and combined energy of 20056 – that’s very strong. The wind is cross-shore from the NNE at 9 mph, with slight cross-chop. For the Sakawa River, that’s too big – it’s an expert-only gig if you even dare. The afternoon is even bigger at 23ft, 16 seconds, energy 24149, with cleaner cross-offshore wind. This is giant, dangerous, and only for the brave.

Friday, September 4th, the swell drops but remains potent: 21.3ft in the morning (energy 13347) with clean cross-offshore wind, still enormous. But then Friday afternoon, it drops to a much more manageable 8.2ft from the SE, 11 seconds, energy 2170, with clean cross-offshore wind. That is your best bet of the whole period – a solid, powerful swell, clean conditions, and a good size for intermediate-to-advanced surfers at a river mouth that should handle that SE direction beautifully.

Saturday, September 5th, fades to 4.6ft in the morning (energy 527) with clean wind, then drops off in the afternoon.

So, true standout: Friday afternoon, September 4th, at Sakawa River. Swell at 8.2ft from the SE, period 11 seconds, clean cross-offshore wind. That’s the best combo of size, condition, and safety in the whole forecast. The Thursday and Friday morning swells are too big

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