Isla Negra Surf Forecast and Surf Report

Alright, let’s talk about Isla Negra. This is a reef break, so it’s a bit of a specialist wave—it’s for advanced surfers only, and it’s very consistent with the right swell. The optimum swell direction is from the NNW, but we’re mostly seeing a long-period WSW swell coming through. That’s a bit of a mismatch, but don’t let that scare you off just yet.

The water temp feels about average for this time of year, nothing unusual.

We’ve got a slow start. The first real action kicks off on Saturday the 29th of August. The morning is the standout of the whole first week. A solid 6 ft swell from the WSW, with a long 12-second period, and the wind is a light cross-offshore from the SE at 3 mph. That’s clean, glassy conditions. The energy is strong (887) and the waves are going to be well-shaped. A bit heavy for beginners, but for you advanced guys, this is the pick of the early days.

The afternoon takes a small step back. Swell drops to 6 ft, still clean, but the wind picks up to 9 mph from the SSW, making it a bit more cross-off. Still surfable, but not as perfect.

Sunday the 30th is a mixed bag. The morning is a cross-on wind from the W at 6 mph, which will put a bit of a bump on the face. Swell 5 ft, 11-second period. The afternoon goes back to a clean cross-off, but the energy is dropping (494). Still a decent wave, but not the morning’s magic.

Monday the 31st and Tuesday the 1st of September see the swell slowly fading. Monday morning has 4 ft at 11 seconds, with a light S wind, keeping it clean. By Tuesday, the swell drops to 3 ft and the wind goes offshore, but the energy is weak (198). Ordinary, small waves.

Wednesday the 2nd of September is tiny. 3 ft in the morning, and then a weird pulse in the afternoon: a 2 ft swell with an 18-second period. That’s a very long-period groundswell, but it’s so small it’s barely breaking. The energy cranked up to 285 from that long period, but it’s a tease.

Now, here’s where it gets interesting again. Thursday the 3rd of September is a solid double-up. The morning serves up a clean 3 ft wave with a 16-second period and offshore S wind at 6 mph. The energy is already strong (532). But the afternoon? That’s a real contender. 5 ft, 15-second period, clean cross-off wind. The energy jumps to 970. That’s a powerful, long-period groundswell. For a reef setup like this, it’s going to produce some proper, long-lined walls. This is the second best session of the whole outlook.

Friday the 4th keeps the quality up with 5 ft and 4 ft swell, 13-second period, and clean cross-off winds. The energy stays strong (653 and 526). Consistent, good waves.

Saturday the 5th of September is another good day. The swell picks back up to 5 ft in the afternoon, with a 12-second period and light cross-off wind. The energy is 625. Very good.

Then we hit a dead zone. From Sunday the 6th of September afternoon, all the way through to Wednesday the 9th, it’s flat. Zero energy. A few days of nothing.

Thursday the 10th of September sees a tiny 0.3 ft pulse, not worth paddling out for.

Friday the 11th of September gets a bit of life back. The morning is 3 ft at 12 seconds, but with a 12 mph cross-off, it’s a bit messy. The afternoon is a warning sign: 7 ft, but with a short, choppy 7-second period from the NW, and the wind is 19 mph. That’s a lot of energy (1004), but it’s a junky, blown-out combo. That’s expert-only territory, and even then, it’s not pretty.

Saturday the 12th of September is the final standout. The morning is a very clean 5 ft at 11 seconds, light wind, energy at 760. That’s a beautiful session. The afternoon gets bigger, 8 ft, but the period drops to 11 seconds and the wind jumps to 16 mph, making it harder to handle. Still, the morning is a solid send-off.

Sunday the 13th drops back to a tiny 0.7 ft from a long period, but it’s all over.

So, the real standouts are Saturday the 29th of August morning and Thursday the 3rd of September afternoon. The first has the best combination of size, period, and glassy wind. The second is a long-period groundswell that will really suit the reef. The long gap of flat days from the 6th to the 10th is a bit of a bummer, but that’s the way it rolls sometimes.

Rusty.

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