Surf Forecast for Honoli'i
type: Dataset
description: 10-day surf forecast with Strike Scores for Honoli'i, Hilo, Big Island, USA
about: Honoli'i
  type: TouristAttraction
  geo: GeoCoordinates
    latitude: 19.757
    longitude: -155.092
  description: Honoli'i is the most consistent wave on the Big Island's east side—a rivermouth break near Hilo that creates strong, reliable peaks year-round. Sharp lava rocks demand respect, and it's usually onshore with trade winds, but when the winds switch offshore, it's magic.
summary:
  best day:
    date: 2026-08-09
    score: 44
    category: Poor
    explanation: Best day in the forecast: 2026-08-09 with a score of 44/100 (Poor)
  firing days count: 0
  overall recommendation: Poor conditions overall: Average score 33/100. Look for spots with better forecasts.
forecasts:
  date: 2026-08-04
  day index: 0
  strike score:
    final score: 41
    category: Poor
    category emoji: 💤
    confidence: 1
    confidence explanation: Very high confidence (0-1 day forecast)
    breakdown:
      swell direction:
        score: 13
        out of: 25
        explanation: Moderate alignment: Swell from 66° is 21° off optimal 45°, workable but not ideal.
      swell size:
        score: 15
        out of: 25
        explanation: Marginal size: 1.8m is 0.1m from ideal 1.9m.
      swell period:
        score: 6
        out of: 25
        explanation: Moderate period: 8s meets minimum 8s but below ideal 12s. Some groundswell energy present.
      wind:
        score: 10
        out of: 25
        explanation: Onshore/cross-shore: 10 km/h from 104° (ESE). Destroying wave quality. Offshore range: 200°-260°.
    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 Honoli'i. Either swell direction (66°), size (1.8m), or wind (10 km/h from 104°) is unfavorable. Consider other spots or wait for better conditions.
  conditions:
    swell:
      height m: 1.8
      height ft: 5.9
      direction degrees: 66
      direction cardinal: ENE
      period s: 8
      explanation: 1.8m (5.9ft) swell from 66° (ENE) at 8s period
    wind:
      speed kmh: 10
      speed mph: 6.2
      direction degrees: 104
      direction cardinal: ESE
      explanation: 10 km/h (6 mph) from 104° (ESE)
forecasts:
  date: 2026-08-05
  day index: 1
  strike score:
    final score: 37
    category: Poor
    category emoji: 💤
    confidence: 1
    confidence explanation: Very high confidence (0-1 day forecast)
    breakdown:
      swell direction:
        score: 14
        out of: 25
        explanation: Moderate alignment: Swell from 64° is 19° off optimal 45°, workable but not ideal.
      swell size:
        score: 12
        out of: 25
        explanation: Marginal size: 1.4m is 0.6m from ideal 1.9m.
      swell period:
        score: 4
        out of: 25
        explanation: Short period: 7s is below minimum 8s. Windswell-dominated (choppy, weak waves).
      wind:
        score: 11
        out of: 25
        explanation: Onshore/cross-shore: 9 km/h from 66° (ENE). Destroying wave quality. Offshore range: 200°-260°.
    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 Honoli'i. Either swell direction (64°), size (1.4m), or wind (9 km/h from 66°) is unfavorable. Consider other spots or wait for better conditions.
  conditions:
    swell:
      height m: 1.4
      height ft: 4.6
      direction degrees: 64
      direction cardinal: ENE
      period s: 7
      explanation: 1.4m (4.6ft) swell from 64° (ENE) at 7s period
    wind:
      speed kmh: 9
      speed mph: 5.6
      direction degrees: 66
      direction cardinal: ENE
      explanation: 9 km/h (6 mph) from 66° (ENE)
forecasts:
  date: 2026-08-06
  day index: 2
  strike score:
    final score: 26
    category: Poor
    category emoji: 💤
    confidence: 0.95
    confidence explanation: High confidence (2-3 day forecast)
    breakdown:
      swell direction:
        score: 12
        out of: 25
        explanation: Moderate alignment: Swell from 69° is 24° off optimal 45°, workable but not ideal.
      swell size:
        score: 10
        out of: 25
        explanation: Marginal size: 1.2m is 0.8m from ideal 1.9m.
      swell period:
        score: 4
        out of: 25
        explanation: Short period: 7s is below minimum 8s. Windswell-dominated (choppy, weak waves).
      wind:
        score: 11
        out of: 25
        explanation: Onshore/cross-shore: 9 km/h from 34° (NE). Destroying wave quality. Offshore range: 200°-260°.
    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 Honoli'i. Either swell direction (69°), size (1.2m), or wind (9 km/h from 34°) is unfavorable. Consider other spots or wait for better conditions.
  conditions:
    swell:
      height m: 1.2
      height ft: 3.9
      direction degrees: 69
      direction cardinal: ENE
      period s: 7
      explanation: 1.2m (3.9ft) swell from 69° (ENE) at 7s period
    wind:
      speed kmh: 9
      speed mph: 5.6
      direction degrees: 34
      direction cardinal: NE
      explanation: 9 km/h (6 mph) from 34° (NE)
    secondary swell:
      height m: 0.5
      direction degrees: 28
      direction cardinal: NNE
      period s: 7
forecasts:
  date: 2026-08-07
  day index: 3
  strike score:
    final score: 26
    category: Poor
    category emoji: 💤
    confidence: 0.92
    confidence explanation: High confidence (2-3 day forecast)
    breakdown:
      swell direction:
        score: 11
        out of: 25
        explanation: Moderate alignment: Swell from 72° is 27° off optimal 45°, workable but not ideal.
      swell size:
        score: 9
        out of: 25
        explanation: Marginal size: 1.1m is 0.8m from ideal 1.9m.
      swell period:
        score: 8
        out of: 25
        explanation: Moderate period: 9s meets minimum 8s but below ideal 12s. Some groundswell energy present.
    summary: Poor conditions at Honoli'i. Either swell direction (72°), size (1.1m), or wind (10 km/h from 23°) is unfavorable. Consider other spots or wait for better conditions.
provider: Strike Mission
date published: 2026-08-05T03:16:05.989Z
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: 9
out of: 25
explanation: Onshore/cross-shore: 10 km/h from 23° (NNE). Destroying wave quality. Offshore range: 200°-260°.

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: 1.1
  height ft: 3.6
  direction degrees: 72
  direction cardinal: ENE
  period s: 9
  explanation: 1.1m (3.6ft) swell from 72° (ENE) at 9s period
wind:
  speed kmh: 10
  speed mph: 6.2
  direction degrees: 23
  direction cardinal: NNE
  explanation: 10 km/h (6 mph) from 23° (NNE)
secondary swell:
  height m: 0.6
  direction degrees: 57
  direction cardinal: ENE
  period s: 9

date: 2026-08-08
day index: 4
strike score:
  final score: 37
  category: Poor
  category emoji: 💤
  confidence: 0.89
  confidence explanation: Moderate confidence (4-5 day forecast)
  breakdown:
    swell direction:
      score: 11
      out of: 25
      explanation: Moderate alignment: Swell from 71° is 26° off optimal 45°, workable but not ideal.
    swell size:
      score: 15
      out of: 25
      explanation: Marginal size: 1.8m is 0.1m from ideal 1.9m.
    swell period:
      score: 2
      out of: 25
      explanation: Short period: 6s is below minimum 8s. Windswell-dominated (choppy, weak waves).
    wind:
      score: 13
      out of: 25
      explanation: Onshore/cross-shore: 8 km/h from 36° (NE). Destroying wave quality. Offshore range: 200°-260°.
  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 Honoli'i. Either swell direction (71°), size (1.8m), or wind (8 km/h from 36°) is unfavorable. Consider other spots or wait for better conditions.
conditions:
  swell:
    height m: 1.8
    height ft: 5.9
    direction degrees: 71
    direction cardinal: ENE
    period s: 6
    explanation: 1.8m (5.9ft) swell from 71° (ENE) at 6s period
  wind:
    speed kmh: 8
    speed mph: 5.0
    direction degrees: 36
    direction cardinal: NE
    explanation: 8 km/h (5 mph) from 36° (NE)

date: 2026-08-09
day index: 5
strike score:
  final score: 44
  category: Poor
  category emoji: 💤
  confidence: 0.86
  confidence explanation: Moderate confidence (4-5 day forecast)
  breakdown:
    swell direction:
      score: 10
      out of: 25
      explanation: Moderate alignment: Swell from 77° is 32° off optimal 45°, workable but not ideal.
    swell size:
      score: 19
      out of: 25
      explanation: Marginal size: 2.1m is 0.2m from ideal 1.9m.
    swell period:
      score: 4
      out of: 25
      explanation: Short period: 7s is below minimum 8s. Windswell-dominated (choppy, weak waves).
    wind:
      score: 15
      out of: 25
      explanation: Onshore/cross-shore: 7 km/h from 64° (ENE). Destroying wave quality. Offshore range: 200°-260°.
  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 Honoli'i. Either swell direction (77°), size (2.1m), or wind (7 km/h from 64°) is unfavorable. Consider other spots or wait for better conditions.
conditions:
  swell:
    height m: 2.1
    height ft: 6.9
    direction degrees: 77
    direction cardinal: ENE
    period s: 7
    explanation: 2.1m (6.9ft) swell from 77° (ENE) at 7s period
  wind:
    speed kmh: 7
    speed mph: 4.3
    direction degrees: 64
    direction cardinal: ENE
    explanation: 7 km/h (4 mph) from 64° (ENE)

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: 10
      out of: 25
      explanation: Moderate alignment: Swell from 76° is 31° off optimal 45°, workable but not ideal.
    swell size:
      score: 17
      out of: 25
      explanation: Marginal size: 1.9m is 0.1m from ideal 1.9m.
    swell period:
      score: 4
      out of: 25
      explanation: Short period: 7s is below minimum 8s. Windswell-dominated (choppy, weak waves).
    wind:
      score: 9
      out of: 25
      explanation: Onshore/cross-shore: 10 km/h from 58° (ENE). Destroying wave quality. Offshore range: 200°-260°.
  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 Honoli'i. Either swell direction (76°), size (1.9m), or wind (10 km/h from 58°) is unfavorable. Consider other spots or wait for better conditions.
conditions:
  swell:
    height m: 1.9
    height ft: 6.2
    direction degrees: 76
    direction cardinal: ENE
    period s: 7
    explanation: 1.9m (6.2ft) swell from 76° (ENE) at 7s period
  wind:
    speed kmh: 10
    speed mph: 6.2
    direction degrees: 58
    direction cardinal: ENE
    explanation: 10 km/h (6 mph) from 58° (ENE)

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: 7
      out of: 25
      explanation: Poor alignment: Swell from 89° is 44° off optimal 45°, barely within workable range 10°-95°.
    swell size:
      score: 10
      out of: 25
      explanation: Marginal size: 1.2m is 0.8m from ideal 1.9m.
    swell period:
      score: 6
      out of: 25
      explanation: Moderate period: 8s meets minimum 8s but below ideal 12s. Some groundswell energy present.
    wind:
      score: 11
      out of: 25
      explanation: Onshore/cross-shore: 9 km/h from 28° (NNE). Destroying wave quality. Offshore range: 200°-260°.
  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 Honoli'i. Either swell direction (89°), size (1.2m), or wind (9 km/h from 28°) is unfavorable. Consider other spots or wait for better conditions.
conditions:
  swell:
    height m: 1.2
    height ft: 3.9
    direction degrees: 89
    direction cardinal: E
    period s: 8
    explanation: 1.2m (3.9ft) swell from 89° (E) at 8s period
  wind:
    speed kmh: 9
    speed mph: 5.6
    direction degrees: 28
    direction cardinal: NNE
    explanation: 9 km/h (6 mph) from 28° (NNE)
  secondary swell:
    height m: 0.7
    direction degrees: 75
    direction cardinal: ENE
    period s: 6

date: 2026-08-12
day index: 8
strike score:
  final score: 31
  category: Poor
  category emoji: 💤
  confidence: 0.8
  confidence explanation: Very low confidence (8-10 day forecast, conditions may change)
  breakdown:
    swell direction:
      score: 6
      out of: 25
      explanation: Poor alignment: Swell from 90° is 45° off optimal 45°, barely within workable range 10°-95°.
    swell size:
      score: 12
      out of: 25
      explanation: Marginal size: 1.4m is 0.6m from ideal 1.9m.
    swell period:
      score: 4
      out of: 25
      explanation: Short period: 7s is below minimum 8s. Windswell-dominated (choppy, weak waves).
    wind:
      score: 13
      out of: 25
      explanation: Onshore/cross-shore: 8 km/h from 15° (NNE). Destroying wave quality. Offshore range: 200°-260°.
  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 Honoli'i. Either swell direction (90°), size (1.4m), or wind (8 km/h from 15°) is unfavorable. Consider other spots or wait for better conditions.
conditions:
  swell:
    height m: 1.4
    height ft: 4.6
    direction degrees: 90
    direction cardinal: E
    period s: 7
    explanation: 1.4m (4.6ft) swell from 90° (E) at 7s period
  wind:
    speed kmh: 8
    speed mph: 5.0
    direction degrees: 15
    direction cardinal: NNE
    explanation: 8 km/h (5 mph) from 15° (NNE)
  secondary swell:
    height m: 0.5
    direction degrees: 61
    direction cardinal: ENE
    period s: 7

date: 2026-08-13
day index: 9
strike score:
  final score: 34
  category: Poor
  category emoji: 💤
  confidence: 0.8
  confidence explanation: Very low confidence (8-10 day forecast, conditions may change)
  breakdown:
    swell direction:
      score: 7
      out of: 25
      explanation: Poor alignment: Swell from 89° is 44° off optimal 45°, barely within workable range 10°-95°.
    swell size:
      score: 12
      out of: 25
      explanation: Marginal size: 1.4m is 0.6m from ideal 1.9m.
    swell period:
      score: 4
      out of: 25
      explanation: Short period: 7s is below minimum 8s. Windswell-dominated (choppy, weak waves).
    wind:
      score: 15
      out of: 25
      explanation: Onshore/cross-shore: 7 km/h from 31° (NNE). Destroying wave quality. Offshore range: 200°-260°.
  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 Honoli'i. Either swell direction (89°), size (1.4m), or wind (7 km/h from 31°) is unfavorable. Consider other spots or wait for better conditions.
conditions:
  swell:
    height m: 1.4
    height ft: 4.6
    direction degrees: 89
    direction cardinal: E
    period s: 7
    explanation: 1.4m (4.6ft) swell from 89° (E) at 7s period
  wind:
    speed kmh: 7
    speed mph: 4.3
    direction degrees: 31
    direction cardinal: NNE
    explanation: 7 km/h (4 mph) from 31° (NNE)
  secondary swell:
    height m: 0.5
    direction degrees: 94
    direction cardinal: E
    period s: 9

Strike Mission
type: Organization