Surf Forecast for La Herradura
type: Dataset
description: 10-day surf forecast with Strike Scores for La Herradura, Chorrillos, Lima, Peru
about: La Herradura
  type: TouristAttraction
  geo: GeoCoordinates
    latitude: -12.17
    longitude: -77.03
  description: La Herradura is Lima's premier pointbreak—a long left-hander that breaks in a horseshoe-shaped bay in the Chorrillos district. When solid South swells hit, the wave connects through three distinct hollow sections, offering rides of several hundred meters. It's one of the few quality waves accessible from Peru's capital city, though it needs significant swell size to wake up. The setting is urban but the wave is world-class, and Lima's surf culture was largely born here.
summary:
  best day:
    date: 2026-08-11
    score: 39
    category: Poor
    explanation: Best day in the forecast: 2026-08-11 with a score of 39/100 (Poor)
  firing days count: 0
  overall recommendation: Poor conditions overall: Average score 27/100. Look for spots with better forecasts.
forecasts:
  date: 2026-08-04
  day index: 0
  strike score:
    final score: 28
    category: Poor
    category emoji: 💤
    confidence: 1
    confidence explanation: Very high confidence (0-1 day forecast)
    breakdown:
      swell direction:
        score: 16
        out of: 25
        explanation: Moderate alignment: Swell from 187° is 13° off optimal 200°, workable but not ideal.
      swell size:
        score: 9
        out of: 25
        explanation: Marginal size: 1.9m is 0.9m from ideal 2.8m.
      swell period:
        score: 4
        out of: 25
        explanation: Short period: 13s is below minimum 14s. Windswell-dominated (choppy, weak waves).
      wind:
        score: 11
        out of: 25
        explanation: Onshore/cross-shore: 9 km/h from 162° (SSE). Destroying wave quality. Offshore range: 292°-22°.
    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 La Herradura. Either swell direction (187°), size (1.9m), or wind (9 km/h from 162°) is unfavorable. Consider other spots or wait for better conditions.
  conditions:
    swell:
      height m: 1.9
      height ft: 6.2
      direction degrees: 187
      direction cardinal: S
      period s: 13
      explanation: 1.9m (6.2ft) swell from 187° (S) at 13s period
    wind:
      speed kmh: 9
      speed mph: 5.6
      direction degrees: 162
      direction cardinal: SSE
      explanation: 9 km/h (6 mph) from 162° (SSE)
    secondary swell:
      height m: 0.7
      direction degrees: 204
      direction cardinal: SSW
      period s: 11
forecasts:
  date: 2026-08-05
  day index: 1
  strike score:
    final score: 20
    category: Poor
    category emoji: 💤
    confidence: 1
    confidence explanation: Very high confidence (0-1 day forecast)
    breakdown:
      swell direction:
        score: 17
        out of: 25
        explanation: Moderate alignment: Swell from 189° is 11° off optimal 200°, workable but not ideal.
      swell size:
        score: 3
        out of: 25
        explanation: Too small: 1.5m is below minimum 1.8m. Waves will be weak/mushy.
      swell period:
        score: 4
        out of: 25
        explanation: Short period: 12s is below minimum 14s. Windswell-dominated (choppy, weak waves).
      wind:
        score: 11
        out of: 25
        explanation: Onshore/cross-shore: 9 km/h from 163° (SSE). Destroying wave quality. Offshore range: 292°-22°.
    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 La Herradura. Either swell direction (189°), size (1.5m), or wind (9 km/h from 163°) is unfavorable. Consider other spots or wait for better conditions.
  conditions:
    swell:
      height m: 1.5
      height ft: 4.9
      direction degrees: 189
      direction cardinal: S
      period s: 12
      explanation: 1.5m (4.9ft) swell from 189° (S) at 12s period
    wind:
      speed kmh: 9
      speed mph: 5.6
      direction degrees: 163
      direction cardinal: SSE
      explanation: 9 km/h (6 mph) from 163° (SSE)
    secondary swell:
      height m: 1
      direction degrees: 211
      direction cardinal: SSW
      period s: 11
forecasts:
  date: 2026-08-06
  day index: 2
  strike score:
    final score: 18
    category: Poor
    category emoji: 💤
    confidence: 0.95
    confidence explanation: High confidence (2-3 day forecast)
    breakdown:
      swell direction:
        score: 15
        out of: 25
        explanation: Moderate alignment: Swell from 216° is 16° off optimal 200°, workable but not ideal.
      swell size:
        score: 2
        out of: 25
        explanation: Too small: 1.2m is below minimum 1.8m. Waves will be weak/mushy.
      swell period:
        score: 6
        out of: 25
        explanation: Moderate period: 14s meets minimum 14s but below ideal 17s. Some groundswell energy present.
      wind:
        score: 9
        out of: 25
        explanation: Onshore/cross-shore: 10 km/h from 129° (SE). Destroying wave quality. Offshore range: 292°-22°.
    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 La Herradura. Either swell direction (216°), size (1.2m), or wind (10 km/h from 129°) is unfavorable. Consider other spots or wait for better conditions.
  conditions:
    swell:
      height m: 1.2
      height ft: 3.9
      direction degrees: 216
      direction cardinal: SW
      period s: 14
      explanation: 1.2m (3.9ft) swell from 216° (SW) at 14s period
    wind:
      speed kmh: 10
      speed mph: 6.2
      direction degrees: 129
      direction cardinal: SE
      explanation: 10 km/h (6 mph) from 129° (SE)
    secondary swell:
      height m: 0.8
      direction degrees: 213
      direction cardinal: SSW
      period s: 11
    windswell:
      height m: 0.3
      period s: 2
      explanation: Local wind-generated waves (choppy, short-period)
forecasts:
  date: 2026-08-07
  day index: 3
  strike score:
    final score: 23
    category: Poor
    category emoji: 💤
    confidence: 0.92
    confidence explanation: High confidence (2-3 day forecast)
    summary: Poor conditions at La Herradura. Either swell direction (201°), size (1.4m), or wind (11 km/h from 131°) is unfavorable. Consider other spots or wait for better conditions.
provider: Strike Mission
date published: 2026-08-05T00:29:50.414Z
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)

swell direction:
  score: 24
  out of: 25
  explanation: Perfect alignment: Swell from 201° is within 5° of optimal 200°.
swell size:
  score: 3
  out of: 25
  explanation: Too small: 1.4m is below minimum 1.8m. Waves will be weak/mushy.
swell period:
  score: 4
  out of: 25
  explanation: Short period: 12s is below minimum 14s. Windswell-dominated (choppy, weak waves).
wind:
  score: 7
  out of: 25
  explanation: Onshore/cross-shore: 11 km/h from 131° (SE). Destroying wave quality. Offshore range: 292°-22°.

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.

swell:
  height m: 1.4
  height ft: 4.6
  direction degrees: 201
  direction cardinal: SSW
  period s: 12
  explanation: 1.4m (4.6ft) swell from 201° (SSW) at 12s period
wind:
  speed kmh: 11
  speed mph: 6.8
  direction degrees: 131
  direction cardinal: SE
  explanation: 11 km/h (7 mph) from 131° (SE)
secondary swell:
  height m: 1.1
  direction degrees: 204
  direction cardinal: SSW
  period s: 8

date: 2026-08-08
day index: 4
strike score:
  final score: 26
  category: Poor
  category emoji: 💤
  confidence: 0.89
  confidence explanation: Moderate confidence (4-5 day forecast)
  breakdown:
    swell direction:
      score: 15
      out of: 25
      explanation: Moderate alignment: Swell from 185° is 15° off optimal 200°, workable but not ideal.
    swell size:
      score: 8
      out of: 25
      explanation: Marginal size: 1.8m is 0.9m from ideal 2.8m.
    swell period:
      score: 4
      out of: 25
      explanation: Short period: 12s is below minimum 14s. Windswell-dominated (choppy, weak waves).
    wind:
      score: 11
      out of: 25
      explanation: Onshore/cross-shore: 9 km/h from 151° (SSE). Destroying wave quality. Offshore range: 292°-22°.
  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 La Herradura. Either swell direction (185°), size (1.8m), or wind (9 km/h from 151°) is unfavorable. Consider other spots or wait for better conditions.
conditions:
  swell:
    height m: 1.8
    height ft: 5.9
    direction degrees: 185
    direction cardinal: S
    period s: 12
    explanation: 1.8m (5.9ft) swell from 185° (S) at 12s period
  wind:
    speed kmh: 9
    speed mph: 5.6
    direction degrees: 151
    direction cardinal: SSE
    explanation: 9 km/h (6 mph) from 151° (SSE)
  secondary swell:
    height m: 0.7
    direction degrees: 219
    direction cardinal: SW
    period s: 11

date: 2026-08-09
day index: 5
strike score:
  final score: 33
  category: Poor
  category emoji: 💤
  confidence: 0.86
  confidence explanation: Moderate confidence (4-5 day forecast)
  breakdown:
    swell direction:
      score: 16
      out of: 25
      explanation: Moderate alignment: Swell from 187° is 13° off optimal 200°, workable but not ideal.
    swell size:
      score: 10
      out of: 25
      explanation: Marginal size: 2.0m is 0.8m from ideal 2.8m.
    swell period:
      score: 6
      out of: 25
      explanation: Moderate period: 14s meets minimum 14s but below ideal 17s. Some groundswell energy present.
    wind:
      score: 11
      out of: 25
      explanation: Onshore/cross-shore: 9 km/h from 147° (SSE). Destroying wave quality. Offshore range: 292°-22°.
  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 La Herradura. Either swell direction (187°), size (2.0m), or wind (9 km/h from 147°) is unfavorable. Consider other spots or wait for better conditions.
conditions:
  swell:
    height m: 2
    height ft: 6.6
    direction degrees: 187
    direction cardinal: S
    period s: 14
    explanation: 2.0m (6.6ft) swell from 187° (S) at 14s period
  wind:
    speed kmh: 9
    speed mph: 5.6
    direction degrees: 147
    direction cardinal: SSE
    explanation: 9 km/h (6 mph) from 147° (SSE)
  secondary swell:
    height m: 0.8
    direction degrees: 206
    direction cardinal: SSW
    period s: 13

date: 2026-08-10
day index: 6
strike score:
  final score: 35
  category: Poor
  category emoji: 💤
  confidence: 0.83
  confidence explanation: Low confidence (6-7 day forecast)
  breakdown:
    swell direction:
      score: 25
      out of: 25
      explanation: Perfect alignment: Swell from 200° is within 5° of optimal 200°.
    swell size:
      score: 9
      out of: 25
      explanation: Marginal size: 1.9m is 0.9m from ideal 2.8m.
    swell period:
      score: 4
      out of: 25
      explanation: Short period: 13s is below minimum 14s. Windswell-dominated (choppy, weak waves).
    wind:
      score: 9
      out of: 25
      explanation: Onshore/cross-shore: 10 km/h from 140° (SE). Destroying wave quality. Offshore range: 292°-22°.
  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 La Herradura. Either swell direction (200°), size (1.9m), or wind (10 km/h from 140°) is unfavorable. Consider other spots or wait for better conditions.
conditions:
  swell:
    height m: 1.9
    height ft: 6.2
    direction degrees: 200
    direction cardinal: SSW
    period s: 13
    explanation: 1.9m (6.2ft) swell from 200° (SSW) at 13s period
  wind:
    speed kmh: 10
    speed mph: 6.2
    direction degrees: 140
    direction cardinal: SE
    explanation: 10 km/h (6 mph) from 140° (SE)
  secondary swell:
    height m: 1.3
    direction degrees: 181
    direction cardinal: S
    period s: 7
  windswell:
    height m: 0.3
    period s: 2
    explanation: Local wind-generated waves (choppy, short-period)

date: 2026-08-11
day index: 7
strike score:
  final score: 39
  category: Poor
  category emoji: 💤
  confidence: 0.8
  confidence explanation: Low confidence (6-7 day forecast)
  breakdown:
    swell direction:
      score: 19
      out of: 25
      explanation: Moderate alignment: Swell from 191° is 9° off optimal 200°, workable but not ideal.
    swell size:
      score: 13
      out of: 25
      explanation: Marginal size: 2.4m is 0.4m from ideal 2.8m.
    swell period:
      score: 2
      out of: 25
      explanation: Short period: 10s is below minimum 14s. Windswell-dominated (choppy, weak waves).
    wind:
      score: 9
      out of: 25
      explanation: Onshore/cross-shore: 10 km/h from 136° (SE). Destroying wave quality. Offshore range: 292°-22°.
  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 La Herradura. Either swell direction (191°), size (2.4m), or wind (10 km/h from 136°) is unfavorable. Consider other spots or wait for better conditions.
conditions:
  swell:
    height m: 2.4
    height ft: 7.9
    direction degrees: 191
    direction cardinal: S
    period s: 10
    explanation: 2.4m (7.9ft) swell from 191° (S) at 10s period
  wind:
    speed kmh: 10
    speed mph: 6.2
    direction degrees: 136
    direction cardinal: SE
    explanation: 10 km/h (6 mph) from 136° (SE)

date: 2026-08-12
day index: 8
strike score:
  final score: 26
  category: Poor
  category emoji: 💤
  confidence: 0.8
  confidence explanation: Very low confidence (8-10 day forecast, conditions may change)
  breakdown:
    swell direction:
      score: 19
      out of: 25
      explanation: Moderate alignment: Swell from 191° is 9° off optimal 200°, workable but not ideal.
    swell size:
      score: 9
      out of: 25
      explanation: Marginal size: 1.9m is 0.9m from ideal 2.8m.
    swell period:
      score: 2
      out of: 25
      explanation: Short period: 10s is below minimum 14s. Windswell-dominated (choppy, weak waves).
    wind:
      score: 9
      out of: 25
      explanation: Onshore/cross-shore: 10 km/h from 140° (SE). Destroying wave quality. Offshore range: 292°-22°.
  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 La Herradura. Either swell direction (191°), size (1.9m), or wind (10 km/h from 140°) is unfavorable. Consider other spots or wait for better conditions.
conditions:
  swell:
    height m: 1.9
    height ft: 6.2
    direction degrees: 191
    direction cardinal: S
    period s: 10
    explanation: 1.9m (6.2ft) swell from 191° (S) at 10s period
  wind:
    speed kmh: 10
    speed mph: 6.2
    direction degrees: 140
    direction cardinal: SE
    explanation: 10 km/h (6 mph) from 140° (SE)
  secondary swell:
    height m: 0.5
    direction degrees: 211
    direction cardinal: SSW
    period s: 13

date: 2026-08-13
day index: 9
strike score:
  final score: 26
  category: Poor
  category emoji: 💤
  confidence: 0.8
  confidence explanation: Very low confidence (8-10 day forecast, conditions may change)
  breakdown:
    swell direction:
      score: 16
      out of: 25
      explanation: Moderate alignment: Swell from 213° is 13° off optimal 200°, workable but not ideal.
    swell size:
      score: 3
      out of: 25
      explanation: Too small: 1.3m is below minimum 1.8m. Waves will be weak/mushy.
    swell period:
      score: 10
      out of: 25
      explanation: Moderate period: 15s meets minimum 14s but below ideal 17s. Some groundswell energy present.
    wind:
      score: 9
      out of: 25
      explanation: Onshore/cross-shore: 10 km/h from 131° (SE). Destroying wave quality. Offshore range: 292°-22°.
  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 La Herradura. Either swell direction (213°), size (1.3m), or wind (10 km/h from 131°) is unfavorable. Consider other spots or wait for better conditions.
conditions:
  swell:
    height m: 1.3
    height ft: 4.3
    direction degrees: 213
    direction cardinal: SSW
    period s: 15
    explanation: 1.3m (4.3ft) swell from 213° (SSW) at 15s period
  wind:
    speed kmh: 10
    speed mph: 6.2
    direction degrees: 131
    direction cardinal: SE
    explanation: 10 km/h (6 mph) from 131° (SE)
  secondary swell:
    height m: 0.9
    direction degrees: 210
    direction cardinal: SSW
    period s: 12
  windswell:
    height m: 0.3
    period s: 2
    explanation: Local wind-generated waves (choppy, short-period)

Strike Mission
type: Organization