Surf Conditions Kermabec Today — Score 5.2/10 and Weather Analysis

Today at Kermabec, Finistère, conditions are moderate with a score of 5.2/10 — respectable but not exceptional for this Atlantic coast break. The swell is holding steady at 1.0m average across the day, driven by a 9.6-second period that delivers enough push to generate rideability without the raw power of longer-period swells. This is classic autumn Atlantic conditions: accessible, playable, and ideal for intermediates looking to log some quality time on the face. The wind situation today is working in your favour. A light 10.0 km/h OSO (west-southwest) breeze is blowing — and here's the critical detail — this direction acts as an offshore wind for Kermabec's exposure on the Finistère coast. Offshore wind cleans the wave face, holds the swell up slightly longer, and creates that crisp definition between line and whitewater that every surfer craves. This is precisely why our best window sits at 17h00 with a score of 5.1/10: tide alignment combined with wind consistency and swell delivery.

🕐 Best session windows

The prime session window today is 17h00 — lock this into your schedule. At this time, the score peaks at 5.1/10, which is the highest rideability you'll find at Kermabec today. Why 17h00 specifically? Tide progression plays a major role: this window coincides with optimal tide state when the sandbanks and underwater topography at Kermabec are best exposed for wave shape and shoulder formation. The OSO offshore wind remains consistent at 10.0 km/h, actively pushing against the 9.6-second swell period to maintain face integrity. Morning sessions will suffer from less favourable tide mechanics, and evening sessions post-17h30 will see the wind potentially veering or weakening. If you can only commit to one window today, make it 17h00.

📊 Detailed weather analysis

The 1.0m swell figure needs context — this represents average wave face height, not Hawaiian scale. Expect sets in the 0.8 to 1.3m range depending on sandbank configuration and tide state. The 9.6-second period is the heart of today's forecast. A 9-10 second period sits in the mid-range zone: it's not the choppy, wind-sensitive 6-7 second stuff, nor is it the organised, powerful 12+ second groundswell that Atlantic storms produce. This 9.6s window delivers a balanced compromise — enough energy to generate proper wave walls and shoulder room, but not so much that you're fighting overly steep faces or dangerous closeouts. Waves will feel smooth-faced and somewhat peeling rather than fat and mushy. Kermabec's exposure as a French Atlantic break means it primarily responds to swell windows originating from Atlantic fetch zones — typically the North Atlantic where winter storms and autumn low-pressure systems generate consistent groundswell. Today's 9.6s period suggests the swell source is moderate-distance, probably 800-1200 nautical miles offshore, and currently in decline phase (hence the modest 1.0m height). The OSO wind is deflecting from the southwest, providing genuine offshore assistance for this particular break's bathymetry. This is not a onshore windscape that will create chop and close out opportunities — the offshore component is working with you.

📍 About the spot

Kermabec, situated on the Finistère coast, is a classic Breton Atlantic-facing break with consistent exposure to Atlantic swell systems. Its permanent characteristics — sandbank morphology, reef interaction, and the subtle slope of its takeoff zone — mean that it responds particularly well to swell periods in the 8-11 second range. The spot's northeast-facing exposure means it's slightly sheltered from true westerly storms, which is why today's OSO wind (with its southwest component) is delivering genuine offshore conditions rather than sideshore interference. Kermabec is known as an intermediate-friendly spot, not a heavy-water proving ground, so a 1.0m day with a 9.6s period is precisely the kind of swell that maximises the break's rideability score.

❓ FAQ

What time is best to surf at Kermabec today?

17h00 is your target time with a score of 5.1/10 — the peak rideability window for 12/09/2026. This aligns optimal tide state with consistent OSO offshore wind and the 9.6-second swell period. Morning sessions will offer weaker tide mechanics, and post-17h30 conditions may deteriorate as wind consistency drops and tide moves away from optimal positioning.

What is the surf score at Kermabec on 12/09/2026?

The maximum score today is 5.2/10, with the best window hitting 5.1/10 at 17h00. This score reflects moderate conditions: 1.0m average swell, 9.6-second period, and light 10.0 km/h OSO offshore wind. It's solid intermediate fare — playable, fun, and accessible — but not exceptional or high-performance territory. You'll find quality wave walls and shoulder room without overwhelming power or technical difficulty.

Are conditions improving this week at Kermabec?

Yes, significantly. Today (5.2/10) and tomorrow (5.7/10) are moderate warm-up days. Monday-Tuesday represent transition phases, but by Wednesday 16/09 and Thursday 17/09, conditions escalate to 6.3/10 with 1.6m swell — genuinely solid sessions. Friday 18/09 is the week's best day: 6.4/10 score with 1.9m swell indicates a full Atlantic swell event. Plan your best effort for the 16th-18th window.