Kugenuma Rivermouth Surf Forecast and Surf Report

Alright folks, Rusty here. Let’s talk about what’s coming up at Kugenuma Rivermouth.

Alright, straight up, the next week is a bit of a write-off. We’ve got a long stretch of tiny, weak waves with poor conditions. From Sunday the 30th of August all the way through to Saturday the 5th of September, the swell is barely kicking. We’re looking at 0.7ft to 2ft of weak, short-period slop (combined energy 15-84). The wind is mostly offshore, keeping the surface clean, but there’s just no power in the water. The water temp is sitting at 82°, which is a touch warmer than normal for this time of year.

The first real glimmer of hope doesn’t show up until Sunday the 6th of September. The morning sees a jump to 3ft from the south with a long 14-second period, and the combined energy bumps up to 444. That’s a decent groundswell pulse, but the surf report calls it marginal. The wind is a fresh offshore from the north at 19 mph, so it’ll be clean, but the tide might be messing with it. The energy gets stronger through the week, and the standout window is definitely Wednesday the 9th of September.

Wednesday the 9th of September is the pick of the bunch. The morning sees 4ft of south swell with a very long 14-second period and combined energy of 642 (moderate to strong). The wind is a moderate offshore from the NNE at 16 mph, keeping the rivermouth clean. This is a solid, powerful groundswell with good shape. The afternoon is even bigger, hitting 5ft with a 15-second period and a combined energy of 1122 (strong). The wind stays cross-offshore, so it’ll be clean. Just be aware that with a long-period swell like this, the rivermouth can handle it well, but the sets will be more spaced out.

Thursday the 10th of September is for the experienced crew. We’re looking at 7ft of S swell in the morning, with a 14-second period and combined energy of 1914 (very strong). The wind is a fresh offshore from the NNE at 22 mph, so it’ll be big and clean, but at over 8ft, this is an expert-only zone. The afternoon holds at 7ft.

Friday the 11th of September is a monster. The morning swell is 13ft from the south with a 10-second period and combined energy of 2730. The wind is a strong offshore from the north at 25 mph. The report literally says it’s too big for this break. This is big, dangerous, and the period is short, making it a close-out mess. This is more of a spectacle than a surf session.

After that, the swell drops off a cliff. Saturday the 12th and Sunday the 13th of September return to small, weak waves with messy onshore winds from the southeast. The combined energy drops back to 35-80. It’s a blank end to the forecast.

So, to wrap it up: the first week is a total dud. The real action is from the 7th of September onwards, with Wednesday the 9th of September being the top pick for a clean, powerful, manageable wave. Thursday and Friday are for experts only. The crowds at Kugenuma Rivermouth are often around, so for the good days, be prepared to share the water.

Rusty.

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