Kugenuma Rivermouth Surf Forecast and Surf Report

Alright, let’s get into it. The next couple of weeks have some real potential, but you gotta be smart about when you paddle out. The surf window here is all about that stretch from the 4th to the 9th. Before that, it’s pretty small and weak, and after that, the swell fades out into nothing.

We kick things off with a couple of tiny, weak days. Sunday and Monday, the swell is barely pushing 1ft to 3ft. It’s surfable but nothing to get excited about. The wind’s mostly offshore though, especially Monday, so the water will be clean, just small.

Then Tuesday the 4th rolls in and things start to wake up. The swell is still a bit raw at 5ft, but it’s got some push. The wind is fresh and offshore in the morning, so it’s gonna be clean. The period is a solid 16 seconds, so there’s some real groundswell in the water. This is the start of the good run for Kugenuma Rivermouth (Kanagawa).

Wednesday the 5th is where it gets proper. Swell jumps to 8ft, and by the afternoon it’s pushing 10ft. The direction is SSE, and the wind is offshore, staying clean all day. This is big and powerful – definitely not one for the beginners. If you’re experienced and can handle it, this is a standout morning before the wind swings more cross-off in the arvo.

Thursday the 6th is probably the pick of the whole run. The swell is solid at 10ft from the S, with a long 16-second period. The wind is offshore and light, making for clean, powerful, grinding waves. This is the day. It’s big, it’s mean, and it’s clean. Expert territory only.

Friday the 7th still has plenty of size, 8ft dropping to 8ft. The wind turns a bit cross-off and then cross, so there’s a little chop in the afternoon. It’s still good, but a step down from Thursday.

Saturday the 8th sees the swell starting to back off a bit, but it’s still a solid 6-7ft. The morning has offshore wind, keeping it clean. Expect some good, powerful waves again for those with the skills. The afternoon gets a bit iffy with a light cross-onshore breeze.

After that, the swell drops off quickly. Sunday the 9th is down to 5ft, and by Monday the 10th we’re back to 3ft or less. From the 10th onward, it’s mostly small and unremarkable. The wind is often strong and offshore, which will keep things clean, but with waves under 3ft, there’s just not much to ride. We go through a stretch from the 11th to the 17th where it’s pretty much flat, with waves only 0.7ft to 3ft. Not worth the paddle.

So, the call is simple: Thursday the 6th is the standout. Big, clean, powerful, all that good stuff. Wednesday the 5th is a close second, especially the morning. If you’re not an expert, steer clear of the 5th and 6th. It’s going to be a proper challenge.

One more thing: the water is a touch warmer than normal for this time of year, about 82°, running 3° above average. Not crazy, but you’ll feel it.

Rusty out.

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