Surf Forecast for Les Sables-d'Olonne
type: Dataset
description: 10-day surf forecast with Strike Scores for Les Sables-d'Olonne, Les Sables-d'Olonne, Vendée, France
about: Les Sables-d'Olonne
  type: TouristAttraction
  geo: GeoCoordinates
    latitude: 46.4967
    longitude: -1.7867
  description: Les Sables-d'Olonne is where France's sailing obsession meets its surf culture—a beach town famous as the starting point for the Vendée Globe round-the-world race that also offers consistent Atlantic surf. The waves are beginner-to-intermediate friendly, with multiple peaks along the town beach. While it lacks the raw power of the Landes region to the south, the accessibility, facilities, and maritime culture make it a popular stop on Atlantic coast surf trips.
summary:
  best day:
    date: 2026-08-11
    score: 23
    category: Poor
    explanation: Best day in the forecast: 2026-08-11 with a score of 23/100 (Poor)
  firing days count: 0
  overall recommendation: Poor conditions overall: Average score 8/100. Look for spots with better forecasts.
forecasts:
  date: 2026-08-04
  day index: 0
  strike score:
    final score: 1
    category: Poor
    category emoji: 💤
    confidence: 1
    confidence explanation: Very high confidence (0-1 day forecast)
    breakdown:
      swell direction:
        score: 11
        out of: 25
        explanation: Moderate alignment: Swell from 266° is 24° off optimal 290°, workable but not ideal.
      swell size:
        score: 5
        out of: 25
        explanation: Too small: 0.7m is below minimum 0.8m. Waves will be weak/mushy.
      swell period:
        score: 2
        out of: 25
        explanation: Short period: 8s is below minimum 10s. Windswell-dominated (choppy, weak waves).
      wind:
        score: 7
        out of: 25
        explanation: Onshore/cross-shore: 11 km/h from 225° (SW). Destroying wave quality. Offshore range: 40°-120°.
    adjustments:
      wind history:
        adjustment: 0
        groomed: false
        morning sickness: false
        explanation: No significant wind history adjustment.
      windswell penalty:
        adjustment: 0
        windswell degraded: false
        explanation: Groundswell-dominant conditions (clean, long-period waves).
      secondary swell bonus:
        adjustment: 0
        explanation: No secondary swell bonus.
    summary: Poor conditions at Les Sables-d'Olonne. Either swell direction (266°), size (0.7m), or wind (11 km/h from 225°) is unfavorable. Consider other spots or wait for better conditions.
  conditions:
    swell:
      height m: 0.7
      height ft: 2.3
      direction degrees: 266
      direction cardinal: W
      period s: 8
      peak period s: 8.1
      explanation: 0.7m (2.3ft) swell from 266° (W) at 8.1s period
    wind:
      speed kmh: 11
      speed mph: 6.8
      direction degrees: 225
      direction cardinal: SW
      explanation: 11 km/h (7 mph) from 225° (SW)
forecasts:
  date: 2026-08-05
  day index: 1
  strike score:
    final score: 3
    category: Poor
    category emoji: 💤
    confidence: 1
    confidence explanation: Very high confidence (0-1 day forecast)
    breakdown:
      swell direction:
        score: 10
        out of: 25
        explanation: Moderate alignment: Swell from 261° is 29° off optimal 290°, workable but not ideal.
      swell size:
        score: 10
        out of: 25
        explanation: Marginal size: 1.1m is 0.8m from ideal 1.9m.
      swell period:
        score: 1
        out of: 25
        explanation: Short period: 6s is below minimum 10s. Windswell-dominated (choppy, weak waves).
      wind:
        score: 4
        out of: 25
        explanation: Onshore/cross-shore: 13 km/h from 282° (WNW). Destroying wave quality. Offshore range: 40°-120°.
    adjustments:
      wind history:
        adjustment: 0
        groomed: false
        morning sickness: false
        explanation: No significant wind history adjustment.
      windswell penalty:
        adjustment: 0
        windswell degraded: false
        explanation: Groundswell-dominant conditions (clean, long-period waves).
      secondary swell bonus:
        adjustment: 0
        explanation: No secondary swell bonus.
    summary: Poor conditions at Les Sables-d'Olonne. Either swell direction (261°), size (1.1m), or wind (13 km/h from 282°) is unfavorable. Consider other spots or wait for better conditions.
  conditions:
    swell:
      height m: 1.1
      height ft: 3.6
      direction degrees: 261
      direction cardinal: W
      period s: 6
      peak period s: 6.3
      explanation: 1.1m (3.6ft) swell from 261° (W) at 6.3s period
    wind:
      speed kmh: 13
      speed mph: 8.1
      direction degrees: 282
      direction cardinal: WNW
      explanation: 13 km/h (8 mph) from 282° (WNW)
    windswell:
      height m: 0.3
      period s: 2
      explanation: Local wind-generated waves (choppy, short-period)
forecasts:
  date: 2026-08-06
  day index: 2
  strike score:
    final score: 0
    category: Poor
    category emoji: 💤
    confidence: 0.95
    confidence explanation: High confidence (2-3 day forecast)
    breakdown:
      swell direction:
        score: 21
        out of: 25
        explanation: Good alignment: Swell from 285° is 5° off optimal 290°, still within prime range.
      swell size:
        score: 5
        out of: 25
        explanation: Too small: 0.7m is below minimum 0.8m. Waves will be weak/mushy.
      swell period:
        score: 2
        out of: 25
        explanation: Short period: 8s is below minimum 10s. Windswell-dominated (choppy, weak waves).
      wind:
        score: 1
        out of: 25
        explanation: Onshore/cross-shore: 19 km/h from 345° (NNW). Destroying wave quality. Offshore range: 40°-120°.
    adjustments:
      wind history:
        adjustment: 0
        groomed: false
        morning sickness: false
        explanation: No significant wind history adjustment.
      windswell penalty:
        adjustment: -3
        windswell degraded: false
        explanation: Groundswell-dominant conditions (clean, long-period waves).
      secondary swell bonus:
        adjustment: 0
        explanation: No secondary swell bonus.
    summary: Poor conditions at Les Sables-d'Olonne. Either swell direction (285°), size (0.7m), or wind (19 km/h from 345°) is unfavorable. Consider other spots or wait for better conditions.
  conditions:
    swell:
      height m: 0.7
      height ft: 2.3
      direction degrees: 285
      direction cardinal: WNW
      period s: 8
      peak period s: 7.8
      explanation: 0.7m (2.3ft) swell from 285° (WNW) at 7.8s period
    wind:
      speed kmh: 19
      speed mph: 11.8
      direction degrees: 345
      direction cardinal: NNW
      explanation: 19 km/h (12 mph) from 345° (NNW)
    windswell:
      height m: 0.4
      period s: 2
      explanation: Local wind-generated waves (choppy, short-period)
forecasts:
  date: 2026-08-07
  day index: 3
  strike score:
    final score: 3
    category: Poor
    category emoji: 💤
    confidence: 0.92
    confidence explanation: High confidence (2-3 day forecast)
    breakdown:
      swell direction:
        score: 20
        out of: 25
        explanation: Good alignment: Swell from 297° is 7° off optimal 290°, still within prime range.
    summary: Poor conditions at Les Sables-d'Olonne. Either swell direction (297°), size (0.4m), or wind (17 km/h from 34°) is unfavorable. Consider other spots or wait for better conditions.
provider: Strike Mission
date published: 2026-08-05T04:15:30.398Z
temporal coverage: 2026-08-04/2026-08-13
data sources: Open-Meteo Marine API (swell/wave data)
data sources: Open-Meteo Weather API (wind/weather data)

score: 2
out of: 25
explanation: Too small: 0.4m is below minimum 0.8m. Waves will be weak/mushy.

score: 6
out of: 25
explanation: Moderate period: 10s meets minimum 10s but below ideal 13s. Some groundswell energy present.

score: 1
out of: 25
explanation: Onshore/cross-shore: 17 km/h from 34° (NE). Destroying wave quality. Offshore range: 40°-120°.

wind history:
  adjustment: 0
  groomed: false
  morning sickness: false
  explanation: No significant wind history adjustment.
windswell penalty:
  adjustment: -3
  windswell degraded: false
  explanation: Groundswell-dominant conditions (clean, long-period waves).
secondary swell bonus:
  adjustment: 0
  explanation: No secondary swell bonus.

swell:
  height m: 0.4
  height ft: 1.3
  direction degrees: 297
  direction cardinal: WNW
  period s: 10
  peak period s: 10.2
  explanation: 0.4m (1.3ft) swell from 297° (WNW) at 10.2s period
wind:
  speed kmh: 17
  speed mph: 10.6
  direction degrees: 34
  direction cardinal: NE
  explanation: 17 km/h (11 mph) from 34° (NE)

date: 2026-08-08
day index: 4
strike score:
  final score: 15
  category: Poor
  category emoji: 💤
  confidence: 0.89
  confidence explanation: Moderate confidence (4-5 day forecast)
  breakdown:
    swell direction:
      score: 23
      out of: 25
      explanation: Good alignment: Swell from 287° is 3° off optimal 290°, still within prime range.
    swell size:
      score: 1
      out of: 25
      explanation: Too small: 0.2m is below minimum 0.8m. Waves will be weak/mushy.
    swell period:
      score: 1
      out of: 25
      explanation: Short period: 6s is below minimum 10s. Windswell-dominated (choppy, weak waves).
    wind:
      score: 11
      out of: 25
      explanation: Onshore/cross-shore: 11 km/h from 135° (SE). Destroying wave quality. Offshore range: 40°-120°.
  adjustments:
    wind history:
      adjustment: 0
      groomed: false
      morning sickness: false
      explanation: No significant wind history adjustment.
    windswell penalty:
      adjustment: -3
      windswell degraded: false
      explanation: Groundswell-dominant conditions (clean, long-period waves).
    secondary swell bonus:
      adjustment: 0
      explanation: No secondary swell bonus.
  summary: Poor conditions at Les Sables-d'Olonne. Either swell direction (287°), size (0.2m), or wind (11 km/h from 135°) is unfavorable. Consider other spots or wait for better conditions.
conditions:
  swell:
    height m: 0.2
    height ft: 0.7
    direction degrees: 287
    direction cardinal: WNW
    period s: 6
    explanation: 0.2m (0.7ft) swell from 287° (WNW) at 6s period
  wind:
    speed kmh: 11
    speed mph: 6.8
    direction degrees: 135
    direction cardinal: SE
    explanation: 11 km/h (7 mph) from 135° (SE)

date: 2026-08-09
day index: 5
strike score:
  final score: 2
  category: Poor
  category emoji: 💤
  confidence: 0.86
  confidence explanation: Moderate confidence (4-5 day forecast)
  breakdown:
    swell direction:
      score: 18
      out of: 25
      explanation: Moderate alignment: Swell from 300° is 10° off optimal 290°, workable but not ideal.
    swell size:
      score: 1
      out of: 25
      explanation: Too small: 0.3m is below minimum 0.8m. Waves will be weak/mushy.
    swell period:
      score: 2
      out of: 25
      explanation: Short period: 8s is below minimum 10s. Windswell-dominated (choppy, weak waves).
    wind:
      score: 2
      out of: 25
      explanation: Onshore/cross-shore: 14 km/h from 290° (WNW). Destroying wave quality. Offshore range: 40°-120°.
  adjustments:
    wind history:
      adjustment: 0
      groomed: false
      morning sickness: false
      explanation: No significant wind history adjustment.
    windswell penalty:
      adjustment: -3
      windswell degraded: false
      explanation: Groundswell-dominant conditions (clean, long-period waves).
    secondary swell bonus:
      adjustment: 0
      explanation: No secondary swell bonus.
  summary: Poor conditions at Les Sables-d'Olonne. Either swell direction (300°), size (0.3m), or wind (14 km/h from 290°) is unfavorable. Consider other spots or wait for better conditions.
conditions:
  swell:
    height m: 0.3
    height ft: 1.0
    direction degrees: 300
    direction cardinal: WNW
    period s: 8
    explanation: 0.3m (1.0ft) swell from 300° (WNW) at 8s period
  wind:
    speed kmh: 14
    speed mph: 8.7
    direction degrees: 290
    direction cardinal: WNW
    explanation: 14 km/h (9 mph) from 290° (WNW)

date: 2026-08-10
day index: 6
strike score:
  final score: 22
  category: Poor
  category emoji: 💤
  confidence: 0.83
  confidence explanation: Low confidence (6-7 day forecast)
  breakdown:
    swell direction:
      score: 22
      out of: 25
      explanation: Good alignment: Swell from 294° is 4° off optimal 290°, still within prime range.
    swell size:
      score: 8
      out of: 25
      explanation: Marginal size: 0.8m is 1.1m from ideal 1.9m.
    swell period:
      score: 1
      out of: 25
      explanation: Short period: 6s is below minimum 10s. Windswell-dominated (choppy, weak waves).
    wind:
      score: 5
      out of: 25
      explanation: Onshore/cross-shore: 13 km/h from 349° (N). Destroying wave quality. Offshore range: 40°-120°.
  adjustments:
    wind history:
      adjustment: 0
      groomed: false
      morning sickness: false
      explanation: No significant wind history adjustment.
    windswell penalty:
      adjustment: -3
      windswell degraded: false
      explanation: Groundswell-dominant conditions (clean, long-period waves).
    secondary swell bonus:
      adjustment: 0
      explanation: No secondary swell bonus.
  summary: Poor conditions at Les Sables-d'Olonne. Either swell direction (294°), size (0.8m), or wind (13 km/h from 349°) is unfavorable. Consider other spots or wait for better conditions.
conditions:
  swell:
    height m: 0.8
    height ft: 2.6
    direction degrees: 294
    direction cardinal: WNW
    period s: 6
    explanation: 0.8m (2.6ft) swell from 294° (WNW) at 6s period
  wind:
    speed kmh: 13
    speed mph: 8.1
    direction degrees: 349
    direction cardinal: N
    explanation: 13 km/h (8 mph) from 349° (N)
  secondary swell:
    height m: 0.4
    direction degrees: 289
    direction cardinal: WNW
    period s: 6
  windswell:
    height m: 0.4
    period s: 3
    explanation: Local wind-generated waves (choppy, short-period)

date: 2026-08-11
day index: 7
strike score:
  final score: 23
  category: Poor
  category emoji: 💤
  confidence: 0.8
  confidence explanation: Low confidence (6-7 day forecast)
  breakdown:
    swell direction:
      score: 18
      out of: 25
      explanation: Moderate alignment: Swell from 300° is 10° off optimal 290°, workable but not ideal.
    swell size:
      score: 3
      out of: 25
      explanation: Too small: 0.6m is below minimum 0.8m. Waves will be weak/mushy.
    swell period:
      score: 2
      out of: 25
      explanation: Short period: 8s is below minimum 10s. Windswell-dominated (choppy, weak waves).
    wind:
      score: 25
      out of: 25
      explanation: Moderate offshore: 11 km/h from 84° (E). Still grooming but noticeable wind.
  adjustments:
    wind history:
      adjustment: 0
      groomed: false
      morning sickness: false
      explanation: No significant wind history adjustment.
    windswell penalty:
      adjustment: 0
      windswell degraded: false
      explanation: Groundswell-dominant conditions (clean, long-period waves).
    secondary swell bonus:
      adjustment: 0
      explanation: No secondary swell bonus.
  summary: Poor conditions at Les Sables-d'Olonne. Either swell direction (300°), size (0.6m), or wind (11 km/h from 84°) is unfavorable. Consider other spots or wait for better conditions.
conditions:
  swell:
    height m: 0.6
    height ft: 2.0
    direction degrees: 300
    direction cardinal: WNW
    period s: 8
    explanation: 0.6m (2.0ft) swell from 300° (WNW) at 8s period
  wind:
    speed kmh: 11
    speed mph: 6.8
    direction degrees: 84
    direction cardinal: E
    explanation: 11 km/h (7 mph) from 84° (E)

date: 2026-08-12
day index: 8
strike score:
  final score: 6
  category: Poor
  category emoji: 💤
  confidence: 0.8
  confidence explanation: Very low confidence (8-10 day forecast, conditions may change)
  breakdown:
    swell direction:
      score: 24
      out of: 25
      explanation: Perfect alignment: Swell from 289° is within 5° of optimal 290°.
    swell size:
      score: 1
      out of: 25
      explanation: Too small: 0.3m is below minimum 0.8m. Waves will be weak/mushy.
    swell period:
      score: 2
      out of: 25
      explanation: Short period: 8s is below minimum 10s. Windswell-dominated (choppy, weak waves).
    wind:
      score: 4
      out of: 25
      explanation: Onshore/cross-shore: 13 km/h from 305° (NW). Destroying wave quality. Offshore range: 40°-120°.
  adjustments:
    wind history:
      adjustment: 0
      groomed: false
      morning sickness: false
      explanation: No significant wind history adjustment.
    windswell penalty:
      adjustment: -5
      windswell degraded: true
      explanation: -5 points: Short-period windswell is present, creating choppy, disorganized conditions.
    secondary swell bonus:
      adjustment: 0
      explanation: No secondary swell bonus.
  summary: Poor conditions at Les Sables-d'Olonne. Either swell direction (289°), size (0.3m), or wind (13 km/h from 305°) is unfavorable. Consider other spots or wait for better conditions.
conditions:
  swell:
    height m: 0.3
    height ft: 1.0
    direction degrees: 289
    direction cardinal: WNW
    period s: 8
    explanation: 0.3m (1.0ft) swell from 289° (WNW) at 8s period
  wind:
    speed kmh: 13
    speed mph: 8.1
    direction degrees: 305
    direction cardinal: NW
    explanation: 13 km/h (8 mph) from 305° (NW)
  windswell:
    height m: 0.3
    period s: 2
    explanation: Local wind-generated waves (choppy, short-period)

date: 2026-08-13
day index: 9
strike score:
  final score: 0
  category: Poor
  category emoji: 💤
  confidence: 0.8
  confidence explanation: Very low confidence (8-10 day forecast, conditions may change)
  breakdown:
    swell direction:
      score: 0
      out of: 25
      explanation: No alignment: Swell from 0° is outside workable range 260°-320°. Wrong swell direction for this spot.
    swell size:
      score: 0
      out of: 25
      explanation: Too small: 0.0m is below minimum 0.8m. Waves will be weak/mushy.
    swell period:
      score: 10
      out of: 25
      explanation: Moderate period: 11s meets minimum 10s but below ideal 13s. Some groundswell energy present.
    wind:
      score: 0
      out of: 25
      explanation: Onshore/cross-shore: 15 km/h from 288° (WNW). Destroying wave quality. Offshore range: 40°-120°.
  adjustments:
    wind history:
      adjustment: 0
      groomed: false
      morning sickness: false
      explanation: No significant wind history adjustment.
    windswell penalty:
      adjustment: 0
      windswell degraded: false
      explanation: Groundswell-dominant conditions (clean, long-period waves).
    secondary swell bonus:
      adjustment: 0
      explanation: No secondary swell bonus.
  summary: Poor conditions at Les Sables-d'Olonne. Either swell direction (0°), size (0.0m), or wind (15 km/h from 288°) is unfavorable. Consider other spots or wait for better conditions.
conditions:
  swell:
    height m: 0
    height ft: 0.0
    direction degrees: 0
    direction cardinal: N
    period s: 11
    explanation: 0.0m (0.0ft) swell from 0° (N) at 11s period
  wind:
    speed kmh: 15
    speed mph: 9.3
    direction degrees: 288
    direction cardinal: WNW
    explanation: 15 km/h (9 mph) from 288° (WNW)

Strike Mission
type: Organization