Surf Forecast for St Leu
type: Dataset
description: 10-day surf forecast with Strike Scores for St Leu, Réunion Island, Réunion
about: St Leu
  type: TouristAttraction
  geo: GeoCoordinates
    latitude: -21.3
    longitude: 55.3333
  description: St Leu is one of the world's best left-hand barrels—a fast, hollow reef break on Réunion Island that produces some of the most intense tubes in the Indian Ocean. The wave is world-class, but the risk is extreme: Réunion has the highest shark attack rate on Earth, and surfing has been heavily restricted. When conditions align, St Leu delivers jaw-dropping perfection, but the shadow of danger looms over every session. Surfing's ultimate risk-reward equation.
summary:
  best day:
    date: 2026-08-14
    score: 64
    category: Fair
    explanation: Best day in the forecast: 2026-08-14 with a score of 64/100 (Fair)
  firing days count: 0
  overall recommendation: Poor conditions overall: Average score 33/100. Look for spots with better forecasts.
forecasts:
  date: 2026-08-05
  day index: 0
  strike score:
    final score: 26
    category: Poor
    category emoji: 💤
    confidence: 1
    confidence explanation: Very high confidence (0-1 day forecast)
    breakdown:
      swell direction:
        score: 0
        out of: 25
        explanation: No alignment: Swell from 129° is outside workable range 200°-240°. Wrong swell direction for this spot.
      swell size:
        score: 11
        out of: 25
        explanation: Marginal size: 1.8m is 0.8m from ideal 2.6m.
      swell period:
        score: 2
        out of: 25
        explanation: Short period: 9s is below minimum 12s. Windswell-dominated (choppy, weak waves).
      wind:
        score: 23
        out of: 25
        explanation: Onshore/cross-shore: 5 km/h from 218° (SW). Destroying wave quality. Offshore range: 90°-180°.
    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 St Leu. Either swell direction (129°), size (1.8m), or wind (5 km/h from 218°) is unfavorable. Consider other spots or wait for better conditions.
  conditions:
    swell:
      height m: 1.8
      height ft: 5.9
      direction degrees: 129
      direction cardinal: SE
      period s: 9
      explanation: 1.8m (5.9ft) swell from 129° (SE) at 9s period
    wind:
      speed kmh: 5
      speed mph: 3.1
      direction degrees: 218
      direction cardinal: SW
      explanation: 5 km/h (3 mph) from 218° (SW)
    secondary swell:
      height m: 0.7
      direction degrees: 189
      direction cardinal: S
      period s: 12
forecasts:
  date: 2026-08-06
  day index: 1
  strike score:
    final score: 16
    category: Poor
    category emoji: 💤
    confidence: 1
    confidence explanation: Very high confidence (0-1 day forecast)
    breakdown:
      swell direction:
        score: 0
        out of: 25
        explanation: No alignment: Swell from 127° is outside workable range 200°-240°. Wrong swell direction for this spot.
      swell size:
        score: 11
        out of: 25
        explanation: Marginal size: 1.7m is 0.9m from ideal 2.6m.
      swell period:
        score: 1
        out of: 25
        explanation: Short period: 8s is below minimum 12s. Windswell-dominated (choppy, weak waves).
      wind:
        score: 15
        out of: 25
        explanation: Onshore/cross-shore: 7 km/h from 268° (W). Destroying wave quality. Offshore range: 90°-180°.
    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 St Leu. Either swell direction (127°), size (1.7m), or wind (7 km/h from 268°) is unfavorable. Consider other spots or wait for better conditions.
  conditions:
    swell:
      height m: 1.7
      height ft: 5.6
      direction degrees: 127
      direction cardinal: SE
      period s: 8
      explanation: 1.7m (5.6ft) swell from 127° (SE) at 8s period
    wind:
      speed kmh: 7
      speed mph: 4.3
      direction degrees: 268
      direction cardinal: W
      explanation: 7 km/h (4 mph) from 268° (W)
    secondary swell:
      height m: 0.8
      direction degrees: 192
      direction cardinal: SSW
      period s: 12
forecasts:
  date: 2026-08-07
  day index: 2
  strike score:
    final score: 21
    category: Poor
    category emoji: 💤
    confidence: 0.95
    confidence explanation: High confidence (2-3 day forecast)
    breakdown:
      swell direction:
        score: 0
        out of: 25
        explanation: No alignment: Swell from 128° is outside workable range 200°-240°. Wrong swell direction for this spot.
      swell size:
        score: 10
        out of: 25
        explanation: Marginal size: 1.5m is 1.1m from ideal 2.6m.
      swell period:
        score: 10
        out of: 25
        explanation: Moderate period: 14s meets minimum 12s but below ideal 18s. Some groundswell energy present.
      wind:
        score: 25
        out of: 25
        explanation: Moderate offshore: 10 km/h from 128° (SE). Still grooming but noticeable wind.
    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 St Leu. Either swell direction (128°), size (1.5m), or wind (10 km/h from 128°) is unfavorable. Consider other spots or wait for better conditions.
  conditions:
    swell:
      height m: 1.5
      height ft: 4.9
      direction degrees: 128
      direction cardinal: SE
      period s: 14
      explanation: 1.5m (4.9ft) swell from 128° (SE) at 14s period
    wind:
      speed kmh: 10
      speed mph: 6.2
      direction degrees: 128
      direction cardinal: SE
      explanation: 10 km/h (6 mph) from 128° (SE)
    secondary swell:
      height m: 0.7
      direction degrees: 187
      direction cardinal: S
      period s: 11
    windswell:
      height m: 1
      period s: 4
      explanation: Local wind-generated waves (choppy, short-period)
forecasts:
  date: 2026-08-08
  day index: 3
  strike score:
    final score: 37
    category: Poor
    category emoji: 💤
    confidence: 0.92
    confidence explanation: High confidence (2-3 day forecast)
    summary: Poor conditions at St Leu. Either swell direction (146°), size (1.3m), or wind (4 km/h from 126°) is unfavorable. Consider other spots or wait for better conditions.
provider: Strike Mission
date published: 2026-08-05T03:10:08.258Z
temporal coverage: 2026-08-05/2026-08-14
data sources: Open-Meteo Marine API (swell/wave data)
data sources: Open-Meteo Weather API (wind/weather data)

swell direction:
  score: 0
  out of: 25
  explanation: No alignment: Swell from 146° is outside workable range 200°-240°. Wrong swell direction for this spot.
swell size:
  score: 9
  out of: 25
  explanation: Marginal size: 1.3m is 1.3m from ideal 2.6m.
swell period:
  score: 23
  out of: 25
  explanation: Good period: 17s is 94% of ideal 18s. Clean, powerful groundswell.
wind:
  score: 25
  out of: 25
  explanation: Light offshore: 4 km/h from 126° (SE). Grooming the wave face beautifully.

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.

swell:
  height m: 1.3
  height ft: 4.3
  direction degrees: 146
  direction cardinal: SE
  period s: 17
  explanation: 1.3m (4.3ft) swell from 146° (SE) at 17s period
wind:
  speed kmh: 4
  speed mph: 2.5
  direction degrees: 126
  direction cardinal: SE
  explanation: 4 km/h (2 mph) from 126° (SE)
secondary swell:
  height m: 0.8
  direction degrees: 193
  direction cardinal: SSW
  period s: 13
windswell:
  height m: 1.1
  period s: 4
  explanation: Local wind-generated waves (choppy, short-period)

date: 2026-08-09
day index: 4
strike score:
  final score: 22
  category: Poor
  category emoji: 💤
  confidence: 0.89
  confidence explanation: Moderate confidence (4-5 day forecast)
  breakdown:
    swell direction:
      score: 0
      out of: 25
      explanation: No alignment: Swell from 133° is outside workable range 200°-240°. Wrong swell direction for this spot.
    swell size:
      score: 12
      out of: 25
      explanation: Marginal size: 2.0m is 0.6m from ideal 2.6m.
    swell period:
      score: 2
      out of: 25
      explanation: Short period: 9s is below minimum 12s. Windswell-dominated (choppy, weak waves).
    wind:
      score: 25
      out of: 25
      explanation: Onshore/cross-shore: 4 km/h from 188° (S). Destroying wave quality. Offshore range: 90°-180°.
  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 St Leu. Either swell direction (133°), size (2.0m), or wind (4 km/h from 188°) is unfavorable. Consider other spots or wait for better conditions.
conditions:
  swell:
    height m: 2
    height ft: 6.6
    direction degrees: 133
    direction cardinal: SE
    period s: 9
    explanation: 2.0m (6.6ft) swell from 133° (SE) at 9s period
  wind:
    speed kmh: 4
    speed mph: 2.5
    direction degrees: 188
    direction cardinal: S
    explanation: 4 km/h (2 mph) from 188° (S)
  secondary swell:
    height m: 1
    direction degrees: 202
    direction cardinal: SSW
    period s: 12
  windswell:
    height m: 0.4
    period s: 2
    explanation: Local wind-generated waves (choppy, short-period)

date: 2026-08-10
day index: 5
strike score:
  final score: 20
  category: Poor
  category emoji: 💤
  confidence: 0.86
  confidence explanation: Moderate confidence (4-5 day forecast)
  breakdown:
    swell direction:
      score: 0
      out of: 25
      explanation: No alignment: Swell from 124° is outside workable range 200°-240°. Wrong swell direction for this spot.
    swell size:
      score: 12
      out of: 25
      explanation: Marginal size: 2.0m is 0.6m from ideal 2.6m.
    swell period:
      score: 6
      out of: 25
      explanation: Moderate period: 12s meets minimum 12s but below ideal 18s. Some groundswell energy present.
    wind:
      score: 25
      out of: 25
      explanation: Glassy: Wind speed 3 km/h (light/variable). Perfect mirror-like surface.
  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 St Leu. Either swell direction (124°), size (2.0m), or wind (3 km/h from 151°) is unfavorable. Consider other spots or wait for better conditions.
conditions:
  swell:
    height m: 2
    height ft: 6.6
    direction degrees: 124
    direction cardinal: SE
    period s: 12
    explanation: 2.0m (6.6ft) swell from 124° (SE) at 12s period
  wind:
    speed kmh: 3
    speed mph: 1.9
    direction degrees: 151
    direction cardinal: SSE
    explanation: 3 km/h (2 mph) from 151° (SSE)
  secondary swell:
    height m: 1
    direction degrees: 209
    direction cardinal: SSW
    period s: 13

date: 2026-08-11
day index: 6
strike score:
  final score: 33
  category: Poor
  category emoji: 💤
  confidence: 0.83
  confidence explanation: Low confidence (6-7 day forecast)
  breakdown:
    swell direction:
      score: 0
      out of: 25
      explanation: No alignment: Swell from 118° is outside workable range 200°-240°. Wrong swell direction for this spot.
    swell size:
      score: 11
      out of: 25
      explanation: Marginal size: 1.7m is 0.9m from ideal 2.6m.
    swell period:
      score: 14
      out of: 25
      explanation: Moderate period: 15s meets minimum 12s but below ideal 18s. Some groundswell energy present.
    wind:
      score: 25
      out of: 25
      explanation: Glassy: Wind speed 3 km/h (light/variable). Perfect mirror-like surface.
  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 St Leu. Either swell direction (118°), size (1.7m), or wind (3 km/h from 175°) is unfavorable. Consider other spots or wait for better conditions.
conditions:
  swell:
    height m: 1.7
    height ft: 5.6
    direction degrees: 118
    direction cardinal: ESE
    period s: 15
    explanation: 1.7m (5.6ft) swell from 118° (ESE) at 15s period
  wind:
    speed kmh: 3
    speed mph: 1.9
    direction degrees: 175
    direction cardinal: S
    explanation: 3 km/h (2 mph) from 175° (S)
  secondary swell:
    height m: 1
    direction degrees: 215
    direction cardinal: SW
    period s: 12

date: 2026-08-12
day index: 7
strike score:
  final score: 49
  category: Fair
  category emoji: 😐
  confidence: 0.8
  confidence explanation: Low confidence (6-7 day forecast)
  breakdown:
    swell direction:
      score: 7
      out of: 25
      explanation: Poor alignment: Swell from 182° is 38° off optimal 220°, barely within workable range 200°-240°.
    swell size:
      score: 10
      out of: 25
      explanation: Marginal size: 1.5m is 1.1m from ideal 2.6m.
    swell period:
      score: 14
      out of: 25
      explanation: Moderate period: 15s meets minimum 12s but below ideal 18s. Some groundswell energy present.
    wind:
      score: 25
      out of: 25
      explanation: Light offshore: 5 km/h from 130° (SE). Grooming the wave face beautifully.
  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: Surfable but not special at St Leu. The 1.5m swell from 182° is workable, but conditions aren't ideal. Fine if you're local, but not worth a dedicated trip.
conditions:
  swell:
    height m: 1.5
    height ft: 4.9
    direction degrees: 182
    direction cardinal: S
    period s: 15
    explanation: 1.5m (4.9ft) swell from 182° (S) at 15s period
  wind:
    speed kmh: 5
    speed mph: 3.1
    direction degrees: 130
    direction cardinal: SE
    explanation: 5 km/h (3 mph) from 130° (SE)
  secondary swell:
    height m: 1
    direction degrees: 152
    direction cardinal: SSE
    period s: 9

date: 2026-08-13
day index: 8
strike score:
  final score: 40
  category: Poor
  category emoji: 💤
  confidence: 0.8
  confidence explanation: Very low confidence (8-10 day forecast, conditions may change)
  breakdown:
    swell direction:
      score: 23
      out of: 25
      explanation: Good alignment: Swell from 223° is 3° off optimal 220°, still within prime range.
    swell size:
      score: 11
      out of: 25
      explanation: Marginal size: 1.8m is 0.8m from ideal 2.6m.
    swell period:
      score: 10
      out of: 25
      explanation: Moderate period: 14s meets minimum 12s but below ideal 18s. Some groundswell energy present.
    wind:
      score: 17
      out of: 25
      explanation: Onshore/cross-shore: 7 km/h from 246° (WSW). Destroying wave quality. Offshore range: 90°-180°.
  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 St Leu. Either swell direction (223°), size (1.8m), or wind (7 km/h from 246°) is unfavorable. Consider other spots or wait for better conditions.
conditions:
  swell:
    height m: 1.8
    height ft: 5.9
    direction degrees: 223
    direction cardinal: SW
    period s: 14
    explanation: 1.8m (5.9ft) swell from 223° (SW) at 14s period
  wind:
    speed kmh: 7
    speed mph: 4.3
    direction degrees: 246
    direction cardinal: WSW
    explanation: 7 km/h (4 mph) from 246° (WSW)
  secondary swell:
    height m: 0.9
    direction degrees: 155
    direction cardinal: SSE
    period s: 10

date: 2026-08-14
day index: 9
strike score:
  final score: 64
  category: Fair
  category emoji: 😐
  confidence: 0.8
  confidence explanation: Very low confidence (8-10 day forecast, conditions may change)
  breakdown:
    swell direction:
      score: 23
      out of: 25
      explanation: Good alignment: Swell from 217° is 3° off optimal 220°, still within prime range.
    swell size:
      score: 5
      out of: 25
      explanation: Too small: 1.1m is below minimum 1.2m. Waves will be weak/mushy.
    swell period:
      score: 21
      out of: 25
      explanation: Good period: 16s is 89% of ideal 18s. Clean, powerful groundswell.
    wind:
      score: 25
      out of: 25
      explanation: Onshore/cross-shore: 4 km/h from 204° (SSW). Destroying wave quality. Offshore range: 90°-180°.
  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: Surfable but not special at St Leu. The 1.1m swell from 217° is workable, but conditions aren't ideal. Fine if you're local, but not worth a dedicated trip.
conditions:
  swell:
    height m: 1.1
    height ft: 3.6
    direction degrees: 217
    direction cardinal: SW
    period s: 16
    explanation: 1.1m (3.6ft) swell from 217° (SW) at 16s period
  wind:
    speed kmh: 4
    speed mph: 2.5
    direction degrees: 204
    direction cardinal: SSW
    explanation: 4 km/h (2 mph) from 204° (SSW)

Strike Mission
type: Organization