Surf Forecast for Yallingup
type: Dataset
description: 10-day surf forecast with Strike Scores for Yallingup, Cape Naturaliste, Australia
about: Yallingup
  type: TouristAttraction
  geo: GeoCoordinates
    latitude: -33.63434
    longitude: 115.02859
  description: Yallingup is a protected reef break on the Cape Naturaliste peninsula that offers a more forgiving alternative to the heavy slabs further south. The right-hand wave breaks in a picturesque bay surrounded by granite headlands and pristine bushland. When massive swells hammer the Margaret River region, Yallingup provides a safe haven with smaller, more manageable waves. The wave suits intermediate to advanced surfers with its long walls and occasional tube sections. Indigenous Noongar people have lived on this coast for over 50,000 years, and the area retains a spiritual quality.
summary:
  best day:
    date: 2026-08-05
    score: 45
    category: Fair
    explanation: Best day in the forecast: 2026-08-05 with a score of 45/100 (Fair)
  firing days count: 0
  overall recommendation: Poor conditions overall: Average score 20/100. Look for spots with better forecasts.
forecasts:
  date: 2026-08-05
  day index: 0
  strike score:
    final score: 45
    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 243° is 8° off optimal 235°, workable but not ideal.
      swell size:
        score: 3
        out of: 25
        explanation: Too big: 3.6m exceeds maximum 2.5m. Risk of closeouts.
      swell period:
        score: 21
        out of: 25
        explanation: Good period: 12s is 92% of ideal 13s. Clean, powerful groundswell.
      wind:
        score: 5
        out of: 25
        explanation: Onshore/cross-shore: 12 km/h from 288° (WNW). Destroying wave quality. Offshore range: 30°-110°.
    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 Yallingup. The 3.6m swell from 243° is workable, but conditions aren't ideal. Fine if you're local, but not worth a dedicated trip.
  conditions:
    swell:
      height m: 3.6
      height ft: 11.8
      direction degrees: 243
      direction cardinal: WSW
      period s: 12
      explanation: 3.6m (11.8ft) swell from 243° (WSW) at 12s period
    wind:
      speed kmh: 12
      speed mph: 7.5
      direction degrees: 288
      direction cardinal: WNW
      explanation: 12 km/h (7 mph) from 288° (WNW)
forecasts:
  date: 2026-08-06
  day index: 1
  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 248° is 13° off optimal 235°, workable but not ideal.
      swell size:
        score: 4
        out of: 25
        explanation: Too big: 3.4m exceeds maximum 2.5m. Risk of closeouts.
      swell period:
        score: 21
        out of: 25
        explanation: Good period: 12s is 92% of ideal 13s. Clean, powerful groundswell.
      wind:
        score: 0
        out of: 25
        explanation: Onshore/cross-shore: 24 km/h from 298° (WNW). Destroying wave quality. Offshore range: 30°-110°.
    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 Yallingup. Either swell direction (248°), size (3.4m), or wind (24 km/h from 298°) is unfavorable. Consider other spots or wait for better conditions.
  conditions:
    swell:
      height m: 3.4
      height ft: 11.2
      direction degrees: 248
      direction cardinal: WSW
      period s: 12
      explanation: 3.4m (11.2ft) swell from 248° (WSW) at 12s 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: 0.9
      period s: 4
      explanation: Local wind-generated waves (choppy, short-period)
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: 19
        out of: 25
        explanation: Moderate alignment: Swell from 243° is 8° off optimal 235°, workable but not ideal.
      swell size:
        score: 6
        out of: 25
        explanation: Too big: 3.2m exceeds maximum 2.5m. Risk of closeouts.
      swell period:
        score: 21
        out of: 25
        explanation: Good period: 12s is 92% of ideal 13s. Clean, powerful groundswell.
      wind:
        score: 0
        out of: 25
        explanation: Onshore/cross-shore: 26 km/h from 260° (W). Destroying wave quality. Offshore range: 30°-110°.
    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 Yallingup. Either swell direction (243°), size (3.2m), or wind (26 km/h from 260°) is unfavorable. Consider other spots or wait for better conditions.
  conditions:
    swell:
      height m: 3.2
      height ft: 10.5
      direction degrees: 243
      direction cardinal: WSW
      period s: 12
      explanation: 3.2m (10.5ft) swell from 243° (WSW) at 12s period
    wind:
      speed kmh: 26
      speed mph: 16.2
      direction degrees: 260
      direction cardinal: W
      explanation: 26 km/h (16 mph) from 260° (W)
    windswell:
      height m: 1.1
      period s: 4
      explanation: Local wind-generated waves (choppy, short-period)
forecasts:
  date: 2026-08-08
  day index: 3
  strike score:
    final score: 13
    category: Poor
    category emoji: 💤
    confidence: 0.92
    confidence explanation: High confidence (2-3 day forecast)
    breakdown:
      swell direction:
        score: 18
        out of: 25
        explanation: Moderate alignment: Swell from 245° is 10° off optimal 235°, workable but not ideal.
      swell size:
        score: 0
        out of: 25
        explanation: Too big: 5.0m exceeds maximum 2.5m. Risk of closeouts.
    summary: Poor conditions at Yallingup. Either swell direction (245°), size (5.0m), or wind (37 km/h from 216°) is unfavorable. Consider other spots or wait for better conditions.
provider: Strike Mission
date published: 2026-08-05T00:33:40.515Z
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: 25
out of: 25
explanation: Perfect period: 13s is at or above ideal 13s. Long-period groundswell with maximum power.

score: 0
out of: 25
explanation: Onshore/cross-shore: 37 km/h from 216° (SW). Destroying wave quality. Offshore range: 30°-110°.

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: 5
  height ft: 16.4
  direction degrees: 245
  direction cardinal: WSW
  period s: 13
  explanation: 5.0m (16.4ft) swell from 245° (WSW) at 13s period
wind:
  speed kmh: 37
  speed mph: 23.0
  direction degrees: 216
  direction cardinal: SW
  explanation: 37 km/h (23 mph) from 216° (SW)
windswell:
  height m: 2.5
  period s: 6
  explanation: Local wind-generated waves (choppy, short-period)

date: 2026-08-09
day index: 4
strike score:
  final score: 14
  category: Poor
  category emoji: 💤
  confidence: 0.89
  confidence explanation: Moderate confidence (4-5 day forecast)
  breakdown:
    swell direction:
      score: 25
      out of: 25
      explanation: Perfect alignment: Swell from 235° is within 5° of optimal 235°.
    swell size:
      score: 3
      out of: 25
      explanation: Too big: 3.5m exceeds maximum 2.5m. Risk of closeouts.
    swell period:
      score: 21
      out of: 25
      explanation: Good period: 12s is 92% of ideal 13s. Clean, powerful groundswell.
    wind:
      score: 0
      out of: 25
      explanation: Onshore/cross-shore: 19 km/h from 258° (WSW). Destroying wave quality. Offshore range: 30°-110°.
  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 Yallingup. Either swell direction (235°), size (3.5m), or wind (19 km/h from 258°) is unfavorable. Consider other spots or wait for better conditions.
conditions:
  swell:
    height m: 3.5
    height ft: 11.5
    direction degrees: 235
    direction cardinal: SW
    period s: 12
    explanation: 3.5m (11.5ft) swell from 235° (SW) at 12s period
  wind:
    speed kmh: 19
    speed mph: 11.8
    direction degrees: 258
    direction cardinal: WSW
    explanation: 19 km/h (12 mph) from 258° (WSW)
  secondary swell:
    height m: 0.4
    direction degrees: 324
    direction cardinal: NW
    period s: 10
  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: 9
  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 227° is 8° off optimal 235°, workable but not ideal.
    swell size:
      score: 7
      out of: 25
      explanation: Too big: 3.1m exceeds maximum 2.5m. Risk of closeouts.
    swell period:
      score: 21
      out of: 25
      explanation: Good period: 12s is 92% of ideal 13s. Clean, powerful groundswell.
    wind:
      score: 0
      out of: 25
      explanation: Onshore/cross-shore: 38 km/h from 226° (SW). Destroying wave quality. Offshore range: 30°-110°.
  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: -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.
  summary: Poor conditions at Yallingup. Either swell direction (227°), size (3.1m), or wind (38 km/h from 226°) is unfavorable. Consider other spots or wait for better conditions.
conditions:
  swell:
    height m: 3.1
    height ft: 10.2
    direction degrees: 227
    direction cardinal: SW
    period s: 12
    explanation: 3.1m (10.2ft) swell from 227° (SW) at 12s period
  wind:
    speed kmh: 38
    speed mph: 23.6
    direction degrees: 226
    direction cardinal: SW
    explanation: 38 km/h (24 mph) from 226° (SW)
  secondary swell:
    height m: 0.5
    direction degrees: 245
    direction cardinal: WSW
    period s: 8
  windswell:
    height m: 2.7
    period s: 6
    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: 15
      out of: 25
      explanation: Moderate alignment: Swell from 220° is 15° off optimal 235°, workable but not ideal.
    swell size:
      score: 1
      out of: 25
      explanation: Too big: 4.2m exceeds maximum 2.5m. Risk of closeouts.
    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: 0
      out of: 25
      explanation: Onshore/cross-shore: 23 km/h from 224° (SW). Destroying wave quality. Offshore range: 30°-110°.
  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 Yallingup. Either swell direction (220°), size (4.2m), or wind (23 km/h from 224°) 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: 13
    explanation: 4.2m (13.8ft) swell from 220° (SW) at 13s period
  wind:
    speed kmh: 23
    speed mph: 14.3
    direction degrees: 224
    direction cardinal: SW
    explanation: 23 km/h (14 mph) from 224° (SW)
  secondary swell:
    height m: 1.6
    direction degrees: 256
    direction cardinal: WSW
    period s: 6
  windswell:
    height m: 0.9
    period s: 4
    explanation: Local wind-generated waves (choppy, short-period)

date: 2026-08-12
day index: 7
strike score:
  final score: 14
  category: Poor
  category emoji: 💤
  confidence: 0.8
  confidence explanation: Low confidence (6-7 day forecast)
  breakdown:
    swell direction:
      score: 20
      out of: 25
      explanation: Good alignment: Swell from 229° is 6° off optimal 235°, still within prime range.
    swell size:
      score: 9
      out of: 25
      explanation: Too big: 2.9m exceeds maximum 2.5m. Risk of closeouts.
    swell period:
      score: 10
      out of: 25
      explanation: Moderate period: 11s meets minimum 10s but below ideal 13s. Some groundswell energy present.
    wind:
      score: 0
      out of: 25
      explanation: Onshore/cross-shore: 15 km/h from 269° (W). Destroying wave quality. Offshore range: 30°-110°.
  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 Yallingup. Either swell direction (229°), size (2.9m), or wind (15 km/h from 269°) is unfavorable. Consider other spots or wait for better conditions.
conditions:
  swell:
    height m: 2.9
    height ft: 9.5
    direction degrees: 229
    direction cardinal: SW
    period s: 11
    explanation: 2.9m (9.5ft) swell from 229° (SW) at 11s period
  wind:
    speed kmh: 15
    speed mph: 9.3
    direction degrees: 269
    direction cardinal: W
    explanation: 15 km/h (9 mph) from 269° (W)
  windswell:
    height m: 0.3
    period s: 2
    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: 21
      out of: 25
      explanation: Good alignment: Swell from 230° is 5° off optimal 235°, still within prime range.
    swell size:
      score: 17
      out of: 25
      explanation: Marginal size: 2.5m is 0.9m from ideal 1.6m.
    swell period:
      score: 6
      out of: 25
      explanation: Moderate period: 10s meets minimum 10s but below ideal 13s. Some groundswell energy present.
    wind:
      score: 0
      out of: 25
      explanation: Onshore/cross-shore: 23 km/h from 297° (WNW). Destroying wave quality. Offshore range: 30°-110°.
  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 Yallingup. Either swell direction (230°), size (2.5m), or wind (23 km/h from 297°) is unfavorable. Consider other spots or wait for better conditions.
conditions:
  swell:
    height m: 2.5
    height ft: 8.2
    direction degrees: 230
    direction cardinal: SW
    period s: 10
    explanation: 2.5m (8.2ft) swell from 230° (SW) at 10s period
  wind:
    speed kmh: 23
    speed mph: 14.3
    direction degrees: 297
    direction cardinal: WNW
    explanation: 23 km/h (14 mph) from 297° (WNW)
  secondary swell:
    height m: 0.4
    direction degrees: 263
    direction cardinal: W
    period s: 12
  windswell:
    height m: 0.9
    period s: 4
    explanation: Local wind-generated waves (choppy, short-period)

date: 2026-08-14
day index: 9
strike score:
  final score: 21
  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 238° is 3° off optimal 235°, still within prime range.
    swell size:
      score: 11
      out of: 25
      explanation: Too big: 2.8m exceeds maximum 2.5m. Risk of closeouts.
    swell period:
      score: 10
      out of: 25
      explanation: Moderate period: 11s meets minimum 10s but below ideal 13s. Some groundswell energy present.
    wind:
      score: 1
      out of: 25
      explanation: Onshore/cross-shore: 17 km/h from 347° (NNW). Destroying wave quality. Offshore range: 30°-110°.
  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 Yallingup. Either swell direction (238°), size (2.8m), or wind (17 km/h from 347°) is unfavorable. Consider other spots or wait for better conditions.
conditions:
  swell:
    height m: 2.8
    height ft: 9.2
    direction degrees: 238
    direction cardinal: WSW
    period s: 11
    explanation: 2.8m (9.2ft) swell from 238° (WSW) at 11s period
  wind:
    speed kmh: 17
    speed mph: 10.6
    direction degrees: 347
    direction cardinal: NNW
    explanation: 17 km/h (11 mph) from 347° (NNW)
  windswell:
    height m: 0.5
    period s: 3
    explanation: Local wind-generated waves (choppy, short-period)

Strike Mission
type: Organization