Aoshima Surf Forecast and Surf Report

G’day, I’m Rusty, and I’ve been staring at the charts for Aoshima (Japan) – a reef break that’s pretty exposed to the open ocean. Honestly, it’s a tough stretch ahead. The water’s sitting at a warm 84°, which is about normal for this time of year, so no surprises there.

The 16-day window starts with a grim run. From Wednesday the 19th right through to Sunday the 23rd, we’ve got nothing but poor surf conditions – tiny, weak swells (energy around 127 to 241) and cross-onshore winds keeping things choppy and messy. There’s a gap of dead days here, with no real surf to speak of.

Monday the 24th brings a glimmer of hope. The morning’s still poor, but by the afternoon, a longer-period ESE swell (15 seconds) rolls in at 4 ft, with energy jumping to 834. The wind’s onshore, but the set waves should have some shape. Still, it’s only marginal – don’t get too excited.

Then things get wild. From Tuesday the 25th into the first week of September, the swell ramps up big time, but the wind stays lousy – cross-onshore or onshore, often moderate to strong breezes, even near gale conditions on the 26th. We’re talking waves of 8 ft to 16 ft, with massive energy (2760 up to 11719), but the quality is poor, choppy, and messy. For a reef break, the bigger days (over 8 ft) are strictly for experts. The period is long (10–17 seconds), which means groundswell, but with the wind all wrong, it’s more of a dangerous mess than a clean wave.

The best window, if you can call it that, shows up around Saturday the 29th. The swell drops to 6 ft from the SSE, the wind shifts to a cross-offshore breeze, and the conditions are clean for the first time. Energy is still moderate at 932, and the period is short (9 seconds), but it’s the most surfable it’s been all outlook. Keep in mind, Aoshima is a reef break that’s fairly consistent, but inconsistent swells here are rare – it’s usually got something. This run, though, is a real test.

Sunday the 30th fades back into poor surf, and the final days of the forecast (early September) see another pulse of big swell (13 ft on the 1st) but with cross-onshore winds and poor conditions again. There’s no standout session here – the 29th afternoon is the only one worth a look, and even that’s marginal. If you’re a kiter, those big, windy days might be more your style.

Rusty

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