Kugenuma Rivermouth Surf Forecast and Surf Report

Alright, surfers, Rusty here. Let’s have a look at the menu for the next couple of weeks. I gotta be straight with you from the jump—it’s a tough stretch. We’ve got a real dry spell for any kind of decent surf. Looking at the charts, the first solid recommendation doesn’t even pop up until Wednesday, August 12th, and even then, it’s more about getting wet than getting good waves. From the beginning of the forecast until that Wednesday morning, there’s nothing worth paddling out for, just flat and messy conditions.

For Wednesday morning, August 12th, the swell starts to flicker a little. Kugenuma Rivermouth might have a few knee-high rolls at about 2 ft from the SSW. The wind is a light cross-offshore from the ENE, which will keep the surface clean. The water’s sitting at a warm 82°, which is about 2° above the long-term average for this time of year. That’s notable—it’s a touch warmer than usual.

The afternoon holds similar, though the swell drops a touch to 2 ft. Both sessions have combined wave energy around 117 to 130 (moderate energy), but the wave comment says it’s “very ordinary conditions.” It’s surfable, but not a standout.

We bump along with tiny, clean conditions on Thursday and Friday, but the swell is too small and weak to get excited about. The combined energy drops into the 40s and 50s (weak energy). The wind stays offshore or cross-off, so the ocean looks pretty, but there’s nothing to ride.

As we move into the second week, it’s a story of waiting. The second week is looking extremely patchy. There’s a glimmer on Saturday, August 16th in the morning with a little 1 ft swell from the ESE and a light cross-off breeze, but the energy is still weak (83). It’s clean, but barely surfable.

The best of the whole outlook, the one that almost gets a reaction, lands on Thursday, August 20th in the morning. We get some glassy conditions—dead calm, zero wind—and a clean-looking 2 ft swell from the SSE. The combined energy sits at 65 (weak), and the wave comment says “surfable waves but very ordinary conditions.” It’s not pumping, but it’ll be the best chance for a glassy, uncrowded session on a river mouth. A bit later, on Wednesday, August 26th in the afternoon, the swell pushes up to 5 ft from the SSE, and the energy jumps strong into 559 (moderate to strong), but the wind is a moderate cross-onshore, making it choppy. That’s a kite-surfing sort of day, not a clean paddle wave.

Because the consistency is “fairly consistent” at this break, there’s always hope the forecasts change for the better. But right now, it’s a week of small, clean scraps, with that Thursday glass-off being your best bet for a peaceful hour on the water.

Stay patient.

Rusty.

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