Guethary - Les Alcyons/Avalanche Surf Forecast and Surf Report

Right, listen up, crew. Rusty here. We’ve only got one spot on the radar for this sixteen-day stretch, and it’s a proper gem if you know what you’re doing. The water here is sitting at 75°, which is much warmer than normal for this time of year – a solid 5° above average, so you might be able to stash the thickest wettie for a session or two.

The action kicks off on Saturday, the 29th of August. The early morning is the absolute standout of the whole period. Guethary - Les Alcyons/Avalanche is an expert reef break that’s consistent once it gets going, and it’s exposed to the west-northwest. Saturday morning, we’ve got a clean 6ft swell from the WNW with a period of 9 seconds. The wind is glassy out of the ESE at just 3 mph. This is peak conditions. The combined swell energy is sitting at 641 (moderate wave energy), and the wave comment says it all: expect very good surf conditions. This is the one to circle.

Now, the session falls off hard in the afternoon. The wind swings to a cross-on shore from the NNW at 9 mph, turning it into a choppy mess. Forget about Saturday arvo.

Sunday the 30th morning is another cracker. Flat calm, no wind at all, with a 5ft NW swell at 10 seconds (solid period). Combined energy is 490 (moderate wave energy), and it’s glassy – expect good surf conditions. Sunday afternoon dies with onshore wind.

Monday the 31st morning is glassy again with no wind and a 5ft NW swell (9 sec period). Combined energy is 433. Good surf conditions. The afternoon gets a light cross-on breeze which messes it up a bit.

Tuesday, the 1st of September, starts off glassy with a NNE breeze at only 3 mph. The swell drops to 5ft from the NW (10 sec period). Combined energy is 392. Expect good surf conditions. Tuesday arvo is onshore, no good.

From Wednesday the 2nd onwards, the size drops right off. Wednesday morning is surfable but very ordinary – just 3ft with a short 8-second period and weak energy of 105. Not worth paddling out for.

We then hit a proper gap. From Wednesday afternoon all the way through to the morning of Saturday the 5th of September, it's flat to marginal at best. No recommendations.

Saturday the 5th morning sees a bit of a pulse return. Glassy winds, 4ft from the NW (10 sec period), combined energy 273. Expect good surf conditions. But Saturday afternoon gets messy with an onshore wind and a longer 13-second period that might gum up the works.

The last real highlight is Sunday the 6th of September morning. Glassy winds from the ENE at 3 mph, with a 4ft NW swell at an 11-second period. Combined energy is 414. Expect good surf conditions. Again, the afternoons are cross-onshore rubbish.

From the 7th of September onward, the winds turn against us – mostly cross-on and onshore – and the swell drops to under 3ft. The final week is a write-off for any quality surf.

The absolute pick of the bunch is Saturday morning, the 29th of August. Second best is Sunday morning the 30th, then Monday the 31st, and that Sunday morning on the 6th of September is a nice long-range promise but less certain. Crowds are *often* here, so if you score the glassy mornings, expect some company.

Rusty.

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