Surf Forecast for Stone Island (Mazatlan)
type: Dataset
description: 10-day surf forecast with Strike Scores for Stone Island (Mazatlan), Mazatlan, Mexico
about: Stone Island (Mazatlan)
  type: TouristAttraction
  geo: GeoCoordinates
    latitude: 23.1833
    longitude: -106.4333
  description: Stone Island is a beach break accessible by boat from Mazatlan that offers fun peaks for surfers looking to escape the crowds. The wave provides a more relaxed vibe than the city breaks, with consistent summer surf.
summary:
  best day:
    date: 2026-08-09
    score: 79
    category: Good
    explanation: Best day in the forecast: 2026-08-09 with a score of 79/100 (Good)
  firing days count: 0
  overall recommendation: Fair recommendation: Stone Island (Mazatlan) has 3 Good days but no Firing days. Decent for a local session.
forecasts:
  date: 2026-08-04
  day index: 0
  strike score:
    final score: 61
    category: Fair
    category emoji: 😐
    confidence: 1
    confidence explanation: Very high confidence (0-1 day forecast)
    breakdown:
      swell direction:
        score: 19
        out of: 25
        explanation: Moderate alignment: Swell from 208° is 8° off optimal 200°, workable but not ideal.
      swell size:
        score: 5
        out of: 25
        explanation: Too small: 0.8m is below minimum 0.9m. Waves will be weak/mushy.
      swell period:
        score: 25
        out of: 25
        explanation: Perfect period: 14s is at or above ideal 13s. Long-period groundswell with maximum power.
      wind:
        score: 15
        out of: 25
        explanation: Onshore/cross-shore: 7 km/h from 181° (S). Destroying wave quality. Offshore range: 0°-45°.
    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 Stone Island (Mazatlan). The 0.8m swell from 208° is workable, but conditions aren't ideal. Fine if you're local, but not worth a dedicated trip.
  conditions:
    swell:
      height m: 0.8
      height ft: 2.6
      direction degrees: 208
      direction cardinal: SSW
      period s: 14
      explanation: 0.8m (2.6ft) swell from 208° (SSW) at 14s period
    wind:
      speed kmh: 7
      speed mph: 4.3
      direction degrees: 181
      direction cardinal: S
      explanation: 7 km/h (4 mph) from 181° (S)
forecasts:
  date: 2026-08-05
  day index: 1
  strike score:
    final score: 62
    category: Fair
    category emoji: 😐
    confidence: 1
    confidence explanation: Very high confidence (0-1 day forecast)
    breakdown:
      swell direction:
        score: 20
        out of: 25
        explanation: Good alignment: Swell from 206° is 6° off optimal 200°, still within prime range.
      swell size:
        score: 5
        out of: 25
        explanation: Too small: 0.8m is below minimum 0.9m. Waves will be weak/mushy.
      swell period:
        score: 25
        out of: 25
        explanation: Perfect period: 13s is at or above ideal 13s. Long-period groundswell with maximum power.
      wind:
        score: 16
        out of: 25
        explanation: Onshore/cross-shore: 9 km/h from 301° (WNW). Destroying wave quality. Offshore range: 0°-45°.
    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 Stone Island (Mazatlan). The 0.8m swell from 206° is workable, but conditions aren't ideal. Fine if you're local, but not worth a dedicated trip.
  conditions:
    swell:
      height m: 0.8
      height ft: 2.6
      direction degrees: 206
      direction cardinal: SSW
      period s: 13
      explanation: 0.8m (2.6ft) swell from 206° (SSW) at 13s period
    wind:
      speed kmh: 9
      speed mph: 5.6
      direction degrees: 301
      direction cardinal: WNW
      explanation: 9 km/h (6 mph) from 301° (WNW)
forecasts:
  date: 2026-08-06
  day index: 2
  strike score:
    final score: 30
    category: Poor
    category emoji: 💤
    confidence: 0.95
    confidence explanation: High confidence (2-3 day forecast)
    breakdown:
      swell direction:
        score: 19
        out of: 25
        explanation: Moderate alignment: Swell from 209° is 9° off optimal 200°, workable but not ideal.
      swell size:
        score: 2
        out of: 25
        explanation: Too small: 0.6m is below minimum 0.9m. Waves will be weak/mushy.
      swell period:
        score: 25
        out of: 25
        explanation: Perfect period: 15s is at or above ideal 13s. Long-period groundswell with maximum power.
      wind:
        score: 14
        out of: 25
        explanation: Onshore/cross-shore: 8 km/h from 273° (W). Destroying wave quality. Offshore range: 0°-45°.
    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 Stone Island (Mazatlan). Either swell direction (209°), size (0.6m), or wind (8 km/h from 273°) is unfavorable. Consider other spots or wait for better conditions.
  conditions:
    swell:
      height m: 0.6
      height ft: 2.0
      direction degrees: 209
      direction cardinal: SSW
      period s: 15
      explanation: 0.6m (2.0ft) swell from 209° (SSW) at 15s period
    wind:
      speed kmh: 8
      speed mph: 5.0
      direction degrees: 273
      direction cardinal: W
      explanation: 8 km/h (5 mph) from 273° (W)
    secondary swell:
      height m: 0.5
      direction degrees: 205
      direction cardinal: SSW
      period s: 9
forecasts:
  date: 2026-08-07
  day index: 3
  strike score:
    final score: 61
    category: Fair
    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 207° is 7° off optimal 200°, still within prime range.
      swell size:
        score: 10
        out of: 25
        explanation: Marginal size: 1.0m is 0.4m from ideal 1.4m.
      swell period:
        score: 25
        out of: 25
        explanation: Perfect period: 14s is at or above ideal 13s. Long-period groundswell with maximum power.
    summary: Surfable but not special at Stone Island (Mazatlan). The 1.0m swell from 207° is workable, but conditions aren't ideal. Fine if you're local, but not worth a dedicated trip.
provider: Strike Mission
date published: 2026-08-05T04:16:08.978Z
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: 11
out of: 25
explanation: Onshore/cross-shore: 10 km/h from 280° (W). Destroying wave quality. Offshore range: 0°-45°.

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
  height ft: 3.3
  direction degrees: 207
  direction cardinal: SSW
  period s: 14
  explanation: 1.0m (3.3ft) swell from 207° (SSW) at 14s period
wind:
  speed kmh: 10
  speed mph: 6.2
  direction degrees: 280
  direction cardinal: W
  explanation: 10 km/h (6 mph) from 280° (W)

date: 2026-08-08
day index: 4
strike score:
  final score: 66
  category: Good
  category emoji: ✅
  confidence: 0.89
  confidence explanation: Moderate confidence (4-5 day forecast)
  breakdown:
    swell direction:
      score: 22
      out of: 25
      explanation: Good alignment: Swell from 204° is 4° off optimal 200°, still within prime range.
    swell size:
      score: 13
      out of: 25
      explanation: Marginal size: 1.2m is 0.2m from ideal 1.4m.
    swell period:
      score: 23
      out of: 25
      explanation: Good period: 16s is 123% of ideal 13s. Clean, powerful groundswell.
    wind:
      score: 13
      out of: 25
      explanation: Onshore/cross-shore: 8 km/h from 185° (S). Destroying wave quality. Offshore range: 0°-45°.
  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: Good surfable conditions at Stone Island (Mazatlan). 1.2m swell from 204° with manageable wind. Solid session guaranteed.
conditions:
  swell:
    height m: 1.2
    height ft: 3.9
    direction degrees: 204
    direction cardinal: SSW
    period s: 16
    explanation: 1.2m (3.9ft) swell from 204° (SSW) at 16s period
  wind:
    speed kmh: 8
    speed mph: 5.0
    direction degrees: 185
    direction cardinal: S
    explanation: 8 km/h (5 mph) from 185° (S)

date: 2026-08-09
day index: 5
strike score:
  final score: 79
  category: Good
  category emoji: ✅
  confidence: 0.86
  confidence explanation: Moderate confidence (4-5 day forecast)
  breakdown:
    swell direction:
      score: 23
      out of: 25
      explanation: Good alignment: Swell from 202° is 2° off optimal 200°, still within prime range.
    swell size:
      score: 11
      out of: 25
      explanation: Marginal size: 1.1m is 0.3m from ideal 1.4m.
    swell period:
      score: 25
      out of: 25
      explanation: Perfect period: 15s is at or above ideal 13s. Long-period groundswell with maximum power.
    wind:
      score: 23
      out of: 25
      explanation: Onshore/cross-shore: 5 km/h from 350° (N). Destroying wave quality. Offshore range: 0°-45°.
  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: Good surfable conditions at Stone Island (Mazatlan). 1.1m swell from 202° with manageable wind. Solid session guaranteed.
conditions:
  swell:
    height m: 1.1
    height ft: 3.6
    direction degrees: 202
    direction cardinal: SSW
    period s: 15
    explanation: 1.1m (3.6ft) swell from 202° (SSW) at 15s period
  wind:
    speed kmh: 5
    speed mph: 3.1
    direction degrees: 350
    direction cardinal: N
    explanation: 5 km/h (3 mph) from 350° (N)

date: 2026-08-10
day index: 6
strike score:
  final score: 75
  category: Good
  category emoji: ✅
  confidence: 0.83
  confidence explanation: Low confidence (6-7 day forecast)
  breakdown:
    swell direction:
      score: 23
      out of: 25
      explanation: Good alignment: Swell from 197° is 3° off optimal 200°, still within prime range.
    swell size:
      score: 10
      out of: 25
      explanation: Marginal size: 1.0m is 0.4m from ideal 1.4m.
    swell period:
      score: 25
      out of: 25
      explanation: Perfect period: 14s is at or above ideal 13s. Long-period groundswell with maximum power.
    wind:
      score: 20
      out of: 25
      explanation: Onshore/cross-shore: 7 km/h from 299° (WNW). Destroying wave quality. Offshore range: 0°-45°.
  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: Good surfable conditions at Stone Island (Mazatlan). 1.0m swell from 197° with manageable wind. Solid session guaranteed.
conditions:
  swell:
    height m: 1
    height ft: 3.3
    direction degrees: 197
    direction cardinal: SSW
    period s: 14
    explanation: 1.0m (3.3ft) swell from 197° (SSW) at 14s period
  wind:
    speed kmh: 7
    speed mph: 4.3
    direction degrees: 299
    direction cardinal: WNW
    explanation: 7 km/h (4 mph) from 299° (WNW)

date: 2026-08-11
day index: 7
strike score:
  final score: 64
  category: Fair
  category emoji: 😐
  confidence: 0.8
  confidence explanation: Low confidence (6-7 day forecast)
  breakdown:
    swell direction:
      score: 21
      out of: 25
      explanation: Good alignment: Swell from 195° is 5° off optimal 200°, still within prime range.
    swell size:
      score: 8
      out of: 25
      explanation: Marginal size: 0.9m is 0.5m from ideal 1.4m.
    swell period:
      score: 25
      out of: 25
      explanation: Perfect period: 14s is at or above ideal 13s. Long-period groundswell with maximum power.
    wind:
      score: 14
      out of: 25
      explanation: Onshore/cross-shore: 8 km/h from 284° (WNW). Destroying wave quality. Offshore range: 0°-45°.
  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 Stone Island (Mazatlan). The 0.9m swell from 195° is workable, but conditions aren't ideal. Fine if you're local, but not worth a dedicated trip.
conditions:
  swell:
    height m: 0.9
    height ft: 3.0
    direction degrees: 195
    direction cardinal: SSW
    period s: 14
    explanation: 0.9m (3.0ft) swell from 195° (SSW) at 14s period
  wind:
    speed kmh: 8
    speed mph: 5.0
    direction degrees: 284
    direction cardinal: WNW
    explanation: 8 km/h (5 mph) from 284° (WNW)
  secondary swell:
    height m: 0.5
    direction degrees: 213
    direction cardinal: SSW
    period s: 16

date: 2026-08-12
day index: 8
strike score:
  final score: 61
  category: Fair
  category emoji: 😐
  confidence: 0.8
  confidence explanation: Very low confidence (8-10 day forecast, conditions may change)
  breakdown:
    swell direction:
      score: 20
      out of: 25
      explanation: Good alignment: Swell from 193° is 7° off optimal 200°, still within prime range.
    swell size:
      score: 5
      out of: 25
      explanation: Too small: 0.8m is below minimum 0.9m. Waves will be weak/mushy.
    swell period:
      score: 25
      out of: 25
      explanation: Perfect period: 14s is at or above ideal 13s. Long-period groundswell with maximum power.
    wind:
      score: 16
      out of: 25
      explanation: Onshore/cross-shore: 9 km/h from 292° (WNW). Destroying wave quality. Offshore range: 0°-45°.
  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 Stone Island (Mazatlan). The 0.8m swell from 193° is workable, but conditions aren't ideal. Fine if you're local, but not worth a dedicated trip.
conditions:
  swell:
    height m: 0.8
    height ft: 2.6
    direction degrees: 193
    direction cardinal: SSW
    period s: 14
    explanation: 0.8m (2.6ft) swell from 193° (SSW) at 14s period
  wind:
    speed kmh: 9
    speed mph: 5.6
    direction degrees: 292
    direction cardinal: WNW
    explanation: 9 km/h (6 mph) from 292° (WNW)
  secondary swell:
    height m: 0.5
    direction degrees: 215
    direction cardinal: SW
    period s: 14

date: 2026-08-13
day index: 9
strike score:
  final score: 30
  category: Poor
  category emoji: 💤
  confidence: 0.8
  confidence explanation: Very low confidence (8-10 day forecast, conditions may change)
  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: 0.6m is below minimum 0.9m. Waves will be weak/mushy.
    swell period:
      score: 23
      out of: 25
      explanation: Good period: 16s is 123% of ideal 13s. Clean, powerful groundswell.
    wind:
      score: 17
      out of: 25
      explanation: Onshore/cross-shore: 6 km/h from 250° (WSW). Destroying wave quality. Offshore range: 0°-45°.
  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 Stone Island (Mazatlan). Either swell direction (216°), size (0.6m), or wind (6 km/h from 250°) is unfavorable. Consider other spots or wait for better conditions.
conditions:
  swell:
    height m: 0.6
    height ft: 2.0
    direction degrees: 216
    direction cardinal: SW
    period s: 16
    explanation: 0.6m (2.0ft) swell from 216° (SW) at 16s period
  wind:
    speed kmh: 6
    speed mph: 3.7
    direction degrees: 250
    direction cardinal: WSW
    explanation: 6 km/h (4 mph) from 250° (WSW)
  secondary swell:
    height m: 0.4
    direction degrees: 215
    direction cardinal: SW
    period s: 17

Strike Mission
type: Organization