Surf Forecast for Margaret River
type: Dataset
description: 10-day surf forecast with Strike Scores for Margaret River, Western Australia, Australia
about: Margaret River
  type: TouristAttraction
  geo: GeoCoordinates
    latitude: -33.97845
    longitude: 114.99485
  description: Margaret River is Western Australia's undisputed wave capital—a stretch of rugged coastline where powerful Indian Ocean swells meet a minefield of world-class reef breaks. The main break offers everything from punchy walls to heavy barrels, while nearby The Box delivers one of Australia's most terrifying slabs. North Point adds a long, perfect left to the mix. The region is also renowned for great white shark activity, adding genuine menace to sessions. Cold, raw, and wild, Margs rewards surfers willing to venture beyond the Bali comfort zone.
summary:
  best day:
    date: 2026-08-05
    score: 39
    category: Poor
    explanation: Best day in the forecast: 2026-08-05 with a score of 39/100 (Poor)
  firing days count: 0
  overall recommendation: Poor conditions overall: Average score 21/100. Look for spots with better forecasts.
forecasts:
  date: 2026-08-05
  day index: 0
  strike score:
    final score: 39
    category: Poor
    category emoji: 💤
    confidence: 1
    confidence explanation: Very high confidence (0-1 day forecast)
    breakdown:
      swell direction:
        score: 21
        out of: 25
        explanation: Good alignment: Swell from 231° is 6° off optimal 225°, still within prime range.
      swell size:
        score: 11
        out of: 25
        explanation: Too big: 5.6m exceeds maximum 5.0m. Risk of closeouts.
      swell period:
        score: 10
        out of: 25
        explanation: Moderate period: 13s meets minimum 12s but below ideal 15s. Some groundswell energy present.
      wind:
        score: 2
        out of: 25
        explanation: Onshore/cross-shore: 14 km/h from 297° (WNW). Destroying wave quality. Offshore range: 45°-135°.
    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 Margaret River. Either swell direction (231°), size (5.6m), or wind (14 km/h from 297°) is unfavorable. Consider other spots or wait for better conditions.
  conditions:
    swell:
      height m: 5.6
      height ft: 18.4
      direction degrees: 231
      direction cardinal: SW
      period s: 13
      explanation: 5.6m (18.4ft) swell from 231° (SW) at 13s period
    wind:
      speed kmh: 14
      speed mph: 8.7
      direction degrees: 297
      direction cardinal: WNW
      explanation: 14 km/h (9 mph) from 297° (WNW)
    windswell:
      height m: 0.3
      period s: 2
      explanation: Local wind-generated waves (choppy, short-period)
forecasts:
  date: 2026-08-06
  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: 20
        out of: 25
        explanation: Good alignment: Swell from 233° is 8° off optimal 225°, still within prime range.
      swell size:
        score: 17
        out of: 25
        explanation: Marginal size: 5.0m is 2.0m from ideal 3.0m.
      swell period:
        score: 10
        out of: 25
        explanation: Moderate period: 13s meets minimum 12s but below ideal 15s. Some groundswell energy present.
      wind:
        score: 0
        out of: 25
        explanation: Onshore/cross-shore: 24 km/h from 298° (WNW). Destroying wave quality. Offshore range: 45°-135°.
    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 Margaret River. Either swell direction (233°), size (5.0m), or wind (24 km/h from 298°) is unfavorable. Consider other spots or wait for better conditions.
  conditions:
    swell:
      height m: 5
      height ft: 16.4
      direction degrees: 233
      direction cardinal: SW
      period s: 13
      explanation: 5.0m (16.4ft) swell from 233° (SW) at 13s period
    wind:
      speed kmh: 24
      speed mph: 14.9
      direction degrees: 298
      direction cardinal: WNW
      explanation: 24 km/h (15 mph) from 298° (WNW)
    windswell:
      height m: 1.2
      period s: 4
      explanation: Local wind-generated waves (choppy, short-period)
forecasts:
  date: 2026-08-07
  day index: 2
  strike score:
    final score: 25
    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 232° is 7° off optimal 225°, still within prime range.
      swell size:
        score: 18
        out of: 25
        explanation: Marginal size: 4.9m is 1.9m from ideal 3.0m.
      swell period:
        score: 6
        out of: 25
        explanation: Moderate period: 12s meets minimum 12s but below ideal 15s. Some groundswell energy present.
      wind:
        score: 0
        out of: 25
        explanation: Onshore/cross-shore: 26 km/h from 264° (W). Destroying wave quality. Offshore range: 45°-135°.
    adjustments:
      wind history:
        adjustment: -10
        groomed: false
        morning sickness: true
        explanation: -10 points: Previous days of onshore wind left residual chop ("morning sickness"), reducing wave quality.
      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 Margaret River. Either swell direction (232°), size (4.9m), or wind (26 km/h from 264°) is unfavorable. Consider other spots or wait for better conditions.
  conditions:
    swell:
      height m: 4.9
      height ft: 16.1
      direction degrees: 232
      direction cardinal: SW
      period s: 12
      explanation: 4.9m (16.1ft) swell from 232° (SW) at 12s period
    wind:
      speed kmh: 26
      speed mph: 16.2
      direction degrees: 264
      direction cardinal: W
      explanation: 26 km/h (16 mph) from 264° (W)
    windswell:
      height m: 1.3
      period s: 4
      explanation: Local wind-generated waves (choppy, short-period)
forecasts:
  date: 2026-08-08
  day index: 3
  strike score:
    final score: 8
    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 234° is 9° off optimal 225°, still within prime range.
    summary: Poor conditions at Margaret River. Either swell direction (234°), size (7.4m), or wind (37 km/h from 215°) is unfavorable. Consider other spots or wait for better conditions.
provider: Strike Mission
date published: 2026-08-05T03:09:20.832Z
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)

score: 3
out of: 25
explanation: Too big: 7.4m exceeds maximum 5.0m. Risk of closeouts.

score: 21
out of: 25
explanation: Good period: 14s is 93% of ideal 15s. Clean, powerful groundswell.

score: 0
out of: 25
explanation: Onshore/cross-shore: 37 km/h from 215° (SW). Destroying wave quality. Offshore range: 45°-135°.

wind history:
  adjustment: -17
  groomed: false
  morning sickness: true
  explanation: -17 points: Previous days of onshore wind left residual chop ("morning sickness"), reducing wave quality.
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: 7.4
  height ft: 24.3
  direction degrees: 234
  direction cardinal: SW
  period s: 14
  explanation: 7.4m (24.3ft) swell from 234° (SW) at 14s period
wind:
  speed kmh: 37
  speed mph: 23.0
  direction degrees: 215
  direction cardinal: SW
  explanation: 37 km/h (23 mph) from 215° (SW)
secondary swell:
  height m: 0.6
  direction degrees: 184
  direction cardinal: S
  period s: 6
windswell:
  height m: 3.4
  period s: 8
  explanation: Local wind-generated waves (choppy, short-period)

date: 2026-08-09
day index: 4
strike score:
  final score: 3
  category: Poor
  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 221° is 4° off optimal 225°, still within prime range.
    swell size:
      score: 8
      out of: 25
      explanation: Too big: 5.9m exceeds maximum 5.0m. Risk of closeouts.
    swell period:
      score: 10
      out of: 25
      explanation: Moderate period: 13s meets minimum 12s but below ideal 15s. Some groundswell energy present.
    wind:
      score: 0
      out of: 25
      explanation: Onshore/cross-shore: 19 km/h from 266° (W). Destroying wave quality. Offshore range: 45°-135°.
  adjustments:
    wind history:
      adjustment: -21
      groomed: false
      morning sickness: true
      explanation: -21 points: Previous days of onshore wind left residual chop ("morning sickness"), reducing wave quality.
    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 Margaret River. Either swell direction (221°), size (5.9m), or wind (19 km/h from 266°) is unfavorable. Consider other spots or wait for better conditions.
conditions:
  swell:
    height m: 5.9
    height ft: 19.4
    direction degrees: 221
    direction cardinal: SW
    period s: 13
    explanation: 5.9m (19.4ft) swell from 221° (SW) at 13s period
  wind:
    speed kmh: 19
    speed mph: 11.8
    direction degrees: 266
    direction cardinal: W
    explanation: 19 km/h (12 mph) from 266° (W)
  windswell:
    height m: 0.6
    period s: 3
    explanation: Local wind-generated waves (choppy, short-period)

date: 2026-08-10
day index: 5
strike score:
  final score: 17
  category: Poor
  category emoji: 💤
  confidence: 0.86
  confidence explanation: Moderate confidence (4-5 day forecast)
  breakdown:
    swell direction:
      score: 19
      out of: 25
      explanation: Moderate alignment: Swell from 215° is 10° off optimal 225°, workable but not ideal.
    swell size:
      score: 12
      out of: 25
      explanation: Too big: 5.5m exceeds maximum 5.0m. Risk of closeouts.
    swell period:
      score: 10
      out of: 25
      explanation: Moderate period: 13s meets minimum 12s but below ideal 15s. Some groundswell energy present.
    wind:
      score: 0
      out of: 25
      explanation: Onshore/cross-shore: 35 km/h from 228° (SW). Destroying wave quality. Offshore range: 45°-135°.
  adjustments:
    wind history:
      adjustment: -11
      groomed: false
      morning sickness: true
      explanation: -11 points: Previous days of onshore wind left residual chop ("morning sickness"), reducing wave quality.
    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 Margaret River. Either swell direction (215°), size (5.5m), or wind (35 km/h from 228°) is unfavorable. Consider other spots or wait for better conditions.
conditions:
  swell:
    height m: 5.5
    height ft: 18.0
    direction degrees: 215
    direction cardinal: SW
    period s: 13
    explanation: 5.5m (18.0ft) swell from 215° (SW) at 13s period
  wind:
    speed kmh: 35
    speed mph: 21.7
    direction degrees: 228
    direction cardinal: SW
    explanation: 35 km/h (22 mph) from 228° (SW)
  secondary swell:
    height m: 0.7
    direction degrees: 244
    direction cardinal: WSW
    period s: 10
  windswell:
    height m: 3
    period s: 7
    explanation: Local wind-generated waves (choppy, short-period)

date: 2026-08-11
day index: 6
strike score:
  final score: 12
  category: Poor
  category emoji: 💤
  confidence: 0.83
  confidence explanation: Low confidence (6-7 day forecast)
  breakdown:
    swell direction:
      score: 18
      out of: 25
      explanation: Moderate alignment: Swell from 213° is 12° off optimal 225°, workable but not ideal.
    swell size:
      score: 1
      out of: 25
      explanation: Too big: 8.5m exceeds maximum 5.0m. Risk of closeouts.
    swell period:
      score: 21
      out of: 25
      explanation: Good period: 14s is 93% of ideal 15s. Clean, powerful groundswell.
    wind:
      score: 0
      out of: 25
      explanation: Onshore/cross-shore: 22 km/h from 226° (SW). Destroying wave quality. Offshore range: 45°-135°.
  adjustments:
    wind history:
      adjustment: -14
      groomed: false
      morning sickness: true
      explanation: -14 points: Previous days of onshore wind left residual chop ("morning sickness"), reducing wave quality.
    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 Margaret River. Either swell direction (213°), size (8.5m), or wind (22 km/h from 226°) is unfavorable. Consider other spots or wait for better conditions.
conditions:
  swell:
    height m: 8.5
    height ft: 27.9
    direction degrees: 213
    direction cardinal: SSW
    period s: 14
    explanation: 8.5m (27.9ft) swell from 213° (SSW) at 14s period
  wind:
    speed kmh: 22
    speed mph: 13.7
    direction degrees: 226
    direction cardinal: SW
    explanation: 22 km/h (14 mph) from 226° (SW)
  windswell:
    height m: 1
    period s: 4
    explanation: Local wind-generated waves (choppy, short-period)

date: 2026-08-12
day index: 7
strike score:
  final score: 17
  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 214° is 11° off optimal 225°, workable but not ideal.
    swell size:
      score: 16
      out of: 25
      explanation: Too big: 5.1m exceeds maximum 5.0m. Risk of closeouts.
    swell period:
      score: 6
      out of: 25
      explanation: Moderate period: 12s meets minimum 12s but below ideal 15s. Some groundswell energy present.
    wind:
      score: 0
      out of: 25
      explanation: Onshore/cross-shore: 16 km/h from 265° (W). Destroying wave quality. Offshore range: 45°-135°.
  adjustments:
    wind history:
      adjustment: -17
      groomed: false
      morning sickness: true
      explanation: -17 points: Previous days of onshore wind left residual chop ("morning sickness"), reducing wave quality.
    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 Margaret River. Either swell direction (214°), size (5.1m), or wind (16 km/h from 265°) is unfavorable. Consider other spots or wait for better conditions.
conditions:
  swell:
    height m: 5.1
    height ft: 16.7
    direction degrees: 214
    direction cardinal: SW
    period s: 12
    explanation: 5.1m (16.7ft) swell from 214° (SW) at 12s period
  wind:
    speed kmh: 16
    speed mph: 9.9
    direction degrees: 265
    direction cardinal: W
    explanation: 16 km/h (10 mph) from 265° (W)
  windswell:
    height m: 0.6
    period s: 3
    explanation: Local wind-generated waves (choppy, short-period)

date: 2026-08-13
day index: 8
strike score:
  final score: 25
  category: Poor
  category emoji: 💤
  confidence: 0.8
  confidence explanation: Very low confidence (8-10 day forecast, conditions may change)
  breakdown:
    swell direction:
      score: 22
      out of: 25
      explanation: Good alignment: Swell from 220° is 5° off optimal 225°, still within prime range.
    swell size:
      score: 20
      out of: 25
      explanation: Good size: 4.2m is within 15% of ideal 3.0m.
    swell period:
      score: 4
      out of: 25
      explanation: Short period: 11s is below minimum 12s. Windswell-dominated (choppy, weak waves).
    wind:
      score: 0
      out of: 25
      explanation: Onshore/cross-shore: 22 km/h from 302° (WNW). Destroying wave quality. Offshore range: 45°-135°.
  adjustments:
    wind history:
      adjustment: -11
      groomed: false
      morning sickness: true
      explanation: -11 points: Previous days of onshore wind left residual chop ("morning sickness"), reducing wave quality.
    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 Margaret River. Either swell direction (220°), size (4.2m), or wind (22 km/h from 302°) is unfavorable. Consider other spots or wait for better conditions.
conditions:
  swell:
    height m: 4.2
    height ft: 13.8
    direction degrees: 220
    direction cardinal: SW
    period s: 11
    explanation: 4.2m (13.8ft) swell from 220° (SW) at 11s period
  wind:
    speed kmh: 22
    speed mph: 13.7
    direction degrees: 302
    direction cardinal: WNW
    explanation: 22 km/h (14 mph) from 302° (WNW)
  secondary swell:
    height m: 0.6
    direction degrees: 238
    direction cardinal: WSW
    period s: 15
  windswell:
    height m: 1
    period s: 4
    explanation: Local wind-generated waves (choppy, short-period)

date: 2026-08-14
day index: 9
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: 24
      out of: 25
      explanation: Perfect alignment: Swell from 226° is within 5° of optimal 225°.
    swell size:
      score: 19
      out of: 25
      explanation: Marginal size: 4.6m is 1.6m from ideal 3.0m.
    swell period:
      score: 6
      out of: 25
      explanation: Moderate period: 12s meets minimum 12s but below ideal 15s. Some groundswell energy present.
    wind:
      score: 1
      out of: 25
      explanation: Onshore/cross-shore: 19 km/h from 334° (NNW). Destroying wave quality. Offshore range: 45°-135°.
  adjustments:
    wind history:
      adjustment: -14
      groomed: false
      morning sickness: true
      explanation: -14 points: Previous days of onshore wind left residual chop ("morning sickness"), reducing wave quality.
    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 Margaret River. Either swell direction (226°), size (4.6m), or wind (19 km/h from 334°) is unfavorable. Consider other spots or wait for better conditions.
conditions:
  swell:
    height m: 4.6
    height ft: 15.1
    direction degrees: 226
    direction cardinal: SW
    period s: 12
    explanation: 4.6m (15.1ft) swell from 226° (SW) at 12s period
  wind:
    speed kmh: 19
    speed mph: 11.8
    direction degrees: 334
    direction cardinal: NNW
    explanation: 19 km/h (12 mph) from 334° (NNW)
  windswell:
    height m: 0.5
    period s: 3
    explanation: Local wind-generated waves (choppy, short-period)

Strike Mission
type: Organization