Belle Ile Surf Forecast and Surf Report

Alright, grab a coffee and let’s get into it.

Belle Ile is looking a bit hit and miss over the next couple of weeks. The water temp here is sitting at 66°, which is about 2° warmer than normal for this time of year, so it's a little on the warm side – not a game changer, but worth a mention.

The action kicks off on Sunday morning (September 13th). The wind is glassy out of the north at just 3 mph, and we’ve got a clean 4 ft swell from the WNW with a period of 11 seconds. The combined energy is moderate (297), and conditions are glassy. This is a real standout for the week – clean, small but fun waves for a beginner-friendly spot. Expect some crowds though, as it's a popular break.

Sunday afternoon goes sour fast with onshore wind, so don’t hold out hope.

Monday the 14th offers a small window in the morning: 3 ft from the WNW with a period of 10 seconds, and a nice offshore breeze from the ENE at 9 mph. Combined energy is moderate (162), and the waves will be clean, but small. A decent option for a quiet session.

After that, things get pretty ordinary. Tuesday through Thursday are mostly cross-on winds and messy surf. Wednesday morning (the 16th) has a 5 ft swell from the WNW (period 10 seconds, energy 399) but it’s cross-on and choppy – not great. Wednesday afternoon bumps up to 6 ft (energy 532) but again, onshore wind kills it.

Friday the 18th brings a longer period groundswell – 16 seconds for the morning, with 4 ft from the WNW (energy 1039). But the wind is cross-on and it’s fairly choppy. The afternoon jumps to 6 ft and 15 seconds (energy 1519), but it’s still a marginal call. For the experienced surfer, there could be some decent lines if you pick your bank, but the wind is not cooperating.

Saturday the 19th is a write-off with fresh cross-on wind.

Now, Sunday the 20th is the other real standout. Morning has an offshore breeze from the ENE at 6 mph, clean 4 ft swell from the WNW with a very long period of 15 seconds (energy 1088). This is excellent for experienced surfers – long period groundswell means the waves will have real punch, and the wind will keep them clean. It’s a reef/point setup, so that long period should wrap in nicely. But heads up – this swell direction is coming from the WNW, while the spot’s optimum is SW, so it might not be at its absolute best. Still, for the conditions on offer, it’s the best session of the outlook.

Sunday afternoon sees a bigger 6 ft swell (period 15 seconds, energy 1500) but cross-on wind makes it messy.

From Monday the 21st through to the end of the forecast, it’s mostly cross-off winds, small swell, or onshore slop. The 22nd and 24th mornings have clean conditions with small 3 ft to 3 ft waves (energy 153 to 257), but nothing special. The 25th morning has a 2 ft swell with a very long 16-second period (energy 420) and clean wind, but it’s tiny.

Overall, your best bets are Sunday morning September 13th for a glassy beginner session, and Sunday morning September 20th for the experienced crew. The middle of the second week is pretty quiet, with a gap of several days where there’s no real recommendation.

Rusty.

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