Surf Forecast for Nusa Left (Karanas)
type: Dataset
description: 10-day surf forecast with Strike Scores for Nusa Left (Karanas), Kavieng, Papua New Guinea
about: Nusa Left (Karanas)
  type: TouristAttraction
  geo: GeoCoordinates
    latitude: -2.6
    longitude: 150.7833
  description: Nusa Left—also known as Karanas—is Kavieng's premier left-hand wave, a fast barreling tube that jacks out of deep water and immediately pitches over shallow reef. The wave offers a unique setup where you're floating in comfortable depth until suddenly dropping into a heavy, draining barrel that demands quick feet and confidence. Accessed by boat from Kavieng or the legendary Lissenung Island, Nusa Left delivers the goods when west swells hit the New Ireland coast. For surfers seeking uncrowded perfection in one of the world's most remote surf destinations, this is PNG at its finest.
summary:
  best day:
    date: 2026-08-05
    score: 42
    category: Poor
    explanation: Best day in the forecast: 2026-08-05 with a score of 42/100 (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: 42
    category: Poor
    category emoji: 💤
    confidence: 1
    confidence explanation: Very high confidence (0-1 day forecast)
    breakdown:
      swell direction:
        score: 0
        out of: 25
        explanation: No alignment: Swell from 207° is outside workable range 240°-300°. Wrong swell direction for this spot.
      swell size:
        score: 5
        out of: 25
        explanation: Too small: 0.7m is below minimum 0.8m. Waves will be weak/mushy.
      swell period:
        score: 25
        out of: 25
        explanation: Perfect period: 14s is at or above ideal 12s. Long-period groundswell with maximum power.
      wind:
        score: 20
        out of: 25
        explanation: Onshore/cross-shore: 7 km/h from 180° (S). Destroying wave quality. Offshore range: 50°-130°.
    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 Nusa Left (Karanas). Either swell direction (207°), size (0.7m), or wind (7 km/h from 180°) is unfavorable. Consider other spots or wait for better conditions.
  conditions:
    swell:
      height m: 0.7
      height ft: 2.3
      direction degrees: 207
      direction cardinal: SSW
      period s: 14
      explanation: 0.7m (2.3ft) swell from 207° (SSW) at 14s period
    wind:
      speed kmh: 7
      speed mph: 4.3
      direction degrees: 180
      direction cardinal: S
      explanation: 7 km/h (4 mph) from 180° (S)
forecasts:
  date: 2026-08-06
  day index: 1
  strike score:
    final score: 12
    category: Poor
    category emoji: 💤
    confidence: 1
    confidence explanation: Very high confidence (0-1 day forecast)
    breakdown:
      swell direction:
        score: 0
        out of: 25
        explanation: No alignment: Swell from 354° is outside workable range 240°-300°. Wrong swell direction for this spot.
      swell size:
        score: 3
        out of: 25
        explanation: Too small: 0.6m is below minimum 0.8m. Waves will be weak/mushy.
      swell period:
        score: 23
        out of: 25
        explanation: Good period: 15s is 125% of ideal 12s. Clean, powerful groundswell.
      wind:
        score: 1
        out of: 25
        explanation: Onshore/cross-shore: 15 km/h from 145° (SE). Destroying wave quality. Offshore range: 50°-130°.
    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 Nusa Left (Karanas). Either swell direction (354°), size (0.6m), or wind (15 km/h from 145°) is unfavorable. Consider other spots or wait for better conditions.
  conditions:
    swell:
      height m: 0.6
      height ft: 2.0
      direction degrees: 354
      direction cardinal: N
      period s: 15
      explanation: 0.6m (2.0ft) swell from 354° (N) at 15s period
    wind:
      speed kmh: 15
      speed mph: 9.3
      direction degrees: 145
      direction cardinal: SE
      explanation: 15 km/h (9 mph) from 145° (SE)
forecasts:
  date: 2026-08-07
  day index: 2
  strike score:
    final score: 17
    category: Poor
    category emoji: 💤
    confidence: 0.95
    confidence explanation: High confidence (2-3 day forecast)
    breakdown:
      swell direction:
        score: 0
        out of: 25
        explanation: No alignment: Swell from 205° is outside workable range 240°-300°. Wrong swell direction for this spot.
      swell size:
        score: 3
        out of: 25
        explanation: Too small: 0.6m is below minimum 0.8m. Waves will be weak/mushy.
      swell period:
        score: 23
        out of: 25
        explanation: Good period: 11s is 92% of ideal 12s. Clean, powerful groundswell.
      wind:
        score: 5
        out of: 25
        explanation: Onshore/cross-shore: 15 km/h from 132° (SE). Destroying wave quality. Offshore range: 50°-130°.
    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 Nusa Left (Karanas). Either swell direction (205°), size (0.6m), or wind (15 km/h from 132°) is unfavorable. Consider other spots or wait for better conditions.
  conditions:
    swell:
      height m: 0.6
      height ft: 2.0
      direction degrees: 205
      direction cardinal: SSW
      period s: 11
      explanation: 0.6m (2.0ft) swell from 205° (SSW) at 11s period
    wind:
      speed kmh: 15
      speed mph: 9.3
      direction degrees: 132
      direction cardinal: SE
      explanation: 15 km/h (9 mph) from 132° (SE)
forecasts:
  date: 2026-08-08
  day index: 3
  strike score:
    final score: 4
    category: Poor
    category emoji: 💤
    confidence: 0.92
    confidence explanation: High confidence (2-3 day forecast)
    breakdown:
      swell direction:
        score: 0
        out of: 25
        explanation: No alignment: Swell from 79° is outside workable range 240°-300°. Wrong swell direction for this spot.
      swell size:
        score: 3
        out of: 25
        explanation: Too small: 0.6m is below minimum 0.8m. Waves will be weak/mushy.
      swell period:
        score: 8
        out of: 25
        explanation: Moderate period: 9s meets minimum 8s but below ideal 12s. Some groundswell energy present.
      wind:
        score: 25
        out of: 25
        explanation: Light offshore: 9 km/h from 89° (E). Grooming the wave face beautifully.
    summary: Poor conditions at Nusa Left (Karanas). Either swell direction (79°), size (0.6m), or wind (9 km/h from 89°) is unfavorable. Consider other spots or wait for better conditions.
provider: Strike Mission
date published: 2026-08-05T05:51:49.963Z
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)

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: 0.6
  height ft: 2.0
  direction degrees: 79
  direction cardinal: E
  period s: 9
  explanation: 0.6m (2.0ft) swell from 79° (E) at 9s period
wind:
  speed kmh: 9
  speed mph: 5.6
  direction degrees: 89
  direction cardinal: E
  explanation: 9 km/h (6 mph) from 89° (E)

date: 2026-08-09
day index: 4
strike score:
  final score: 29
  category: Poor
  category emoji: 💤
  confidence: 0.89
  confidence explanation: Moderate confidence (4-5 day forecast)
  breakdown:
    swell direction:
      score: 0
      out of: 25
      explanation: No alignment: Swell from 336° is outside workable range 240°-300°. Wrong swell direction for this spot.
    swell size:
      score: 3
      out of: 25
      explanation: Too small: 0.6m is below minimum 0.8m. Waves will be weak/mushy.
    swell period:
      score: 25
      out of: 25
      explanation: Perfect period: 14s is at or above ideal 12s. Long-period groundswell with maximum power.
    wind:
      score: 25
      out of: 25
      explanation: Light offshore: 6 km/h from 70° (ENE). Grooming the wave face beautifully.
  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 Nusa Left (Karanas). Either swell direction (336°), size (0.6m), or wind (6 km/h from 70°) is unfavorable. Consider other spots or wait for better conditions.
conditions:
  swell:
    height m: 0.6
    height ft: 2.0
    direction degrees: 336
    direction cardinal: NNW
    period s: 14
    explanation: 0.6m (2.0ft) swell from 336° (NNW) at 14s period
  wind:
    speed kmh: 6
    speed mph: 3.7
    direction degrees: 70
    direction cardinal: ENE
    explanation: 6 km/h (4 mph) from 70° (ENE)

date: 2026-08-10
day index: 5
strike score:
  final score: 41
  category: Poor
  category emoji: 💤
  confidence: 0.86
  confidence explanation: Moderate confidence (4-5 day forecast)
  breakdown:
    swell direction:
      score: 0
      out of: 25
      explanation: No alignment: Swell from 332° is outside workable range 240°-300°. Wrong swell direction for this spot.
    swell size:
      score: 3
      out of: 25
      explanation: Too small: 0.6m is below minimum 0.8m. Waves will be weak/mushy.
    swell period:
      score: 23
      out of: 25
      explanation: Good period: 15s is 125% of ideal 12s. Clean, powerful groundswell.
    wind:
      score: 24
      out of: 25
      explanation: Light offshore: 5 km/h from 128° (SE). Grooming the wave face beautifully.
  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 Nusa Left (Karanas). Either swell direction (332°), size (0.6m), or wind (5 km/h from 128°) is unfavorable. Consider other spots or wait for better conditions.
conditions:
  swell:
    height m: 0.6
    height ft: 2.0
    direction degrees: 332
    direction cardinal: NNW
    period s: 15
    explanation: 0.6m (2.0ft) swell from 332° (NNW) at 15s period
  wind:
    speed kmh: 5
    speed mph: 3.1
    direction degrees: 128
    direction cardinal: SE
    explanation: 5 km/h (3 mph) from 128° (SE)

date: 2026-08-11
day index: 6
strike score:
  final score: 36
  category: Poor
  category emoji: 💤
  confidence: 0.83
  confidence explanation: Low confidence (6-7 day forecast)
  breakdown:
    swell direction:
      score: 0
      out of: 25
      explanation: No alignment: Swell from 329° is outside workable range 240°-300°. Wrong swell direction for this spot.
    swell size:
      score: 5
      out of: 25
      explanation: Too small: 0.7m is below minimum 0.8m. Waves will be weak/mushy.
    swell period:
      score: 23
      out of: 25
      explanation: Good period: 15s is 125% of ideal 12s. Clean, powerful groundswell.
    wind:
      score: 17
      out of: 25
      explanation: Onshore/cross-shore: 7 km/h from 182° (S). Destroying wave quality. Offshore range: 50°-130°.
  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 Nusa Left (Karanas). Either swell direction (329°), size (0.7m), or wind (7 km/h from 182°) is unfavorable. Consider other spots or wait for better conditions.
conditions:
  swell:
    height m: 0.7
    height ft: 2.3
    direction degrees: 329
    direction cardinal: NNW
    period s: 15
    explanation: 0.7m (2.3ft) swell from 329° (NNW) at 15s period
  wind:
    speed kmh: 7
    speed mph: 4.3
    direction degrees: 182
    direction cardinal: S
    explanation: 7 km/h (4 mph) from 182° (S)

date: 2026-08-12
day index: 7
strike score:
  final score: 4
  category: Poor
  category emoji: 💤
  confidence: 0.8
  confidence explanation: Low confidence (6-7 day forecast)
  breakdown:
    swell direction:
      score: 0
      out of: 25
      explanation: No alignment: Swell from 328° is outside workable range 240°-300°. Wrong swell direction for this spot.
    swell size:
      score: 5
      out of: 25
      explanation: Too small: 0.7m is below minimum 0.8m. Waves will be weak/mushy.
    swell period:
      score: 22
      out of: 25
      explanation: Good period: 16s is 133% of ideal 12s. Clean, powerful groundswell.
    wind:
      score: 1
      out of: 25
      explanation: Onshore/cross-shore: 15 km/h from 154° (SSE). Destroying wave quality. Offshore range: 50°-130°.
  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 Nusa Left (Karanas). Either swell direction (328°), size (0.7m), or wind (15 km/h from 154°) is unfavorable. Consider other spots or wait for better conditions.
conditions:
  swell:
    height m: 0.7
    height ft: 2.3
    direction degrees: 328
    direction cardinal: NNW
    period s: 16
    explanation: 0.7m (2.3ft) swell from 328° (NNW) at 16s period
  wind:
    speed kmh: 15
    speed mph: 9.3
    direction degrees: 154
    direction cardinal: SSE
    explanation: 15 km/h (9 mph) from 154° (SSE)

date: 2026-08-13
day index: 8
strike score:
  final score: 15
  category: Poor
  category emoji: 💤
  confidence: 0.8
  confidence explanation: Very low confidence (8-10 day forecast, conditions may change)
  breakdown:
    swell direction:
      score: 0
      out of: 25
      explanation: No alignment: Swell from 328° is outside workable range 240°-300°. Wrong swell direction for this spot.
    swell size:
      score: 5
      out of: 25
      explanation: Too small: 0.7m is below minimum 0.8m. Waves will be weak/mushy.
    swell period:
      score: 22
      out of: 25
      explanation: Good period: 16s is 133% of ideal 12s. Clean, powerful groundswell.
    wind:
      score: 7
      out of: 25
      explanation: Onshore/cross-shore: 12 km/h from 184° (S). Destroying wave quality. Offshore range: 50°-130°.
  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 Nusa Left (Karanas). Either swell direction (328°), size (0.7m), or wind (12 km/h from 184°) is unfavorable. Consider other spots or wait for better conditions.
conditions:
  swell:
    height m: 0.7
    height ft: 2.3
    direction degrees: 328
    direction cardinal: NNW
    period s: 16
    explanation: 0.7m (2.3ft) swell from 328° (NNW) at 16s period
  wind:
    speed kmh: 12
    speed mph: 7.5
    direction degrees: 184
    direction cardinal: S
    explanation: 12 km/h (7 mph) from 184° (S)

date: 2026-08-14
day index: 9
strike score:
  final score: 5
  category: Poor
  category emoji: 💤
  confidence: 0.8
  confidence explanation: Very low confidence (8-10 day forecast, conditions may change)
  breakdown:
    swell direction:
      score: 0
      out of: 25
      explanation: No alignment: Swell from 343° is outside workable range 240°-300°. Wrong swell direction for this spot.
    swell size:
      score: 3
      out of: 25
      explanation: Too small: 0.6m is below minimum 0.8m. Waves will be weak/mushy.
    swell period:
      score: 23
      out of: 25
      explanation: Good period: 15s is 125% of ideal 12s. Clean, powerful groundswell.
    wind:
      score: 1
      out of: 25
      explanation: Onshore/cross-shore: 16 km/h from 161° (SSE). Destroying wave quality. Offshore range: 50°-130°.
  adjustments:
    wind history:
      adjustment: 0
      groomed: false
      morning sickness: false
      explanation: No significant wind history adjustment.
    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 Nusa Left (Karanas). Either swell direction (343°), size (0.6m), or wind (16 km/h from 161°) is unfavorable. Consider other spots or wait for better conditions.
conditions:
  swell:
    height m: 0.6
    height ft: 2.0
    direction degrees: 343
    direction cardinal: NNW
    period s: 15
    explanation: 0.6m (2.0ft) swell from 343° (NNW) at 15s period
  wind:
    speed kmh: 16
    speed mph: 9.9
    direction degrees: 161
    direction cardinal: SSE
    explanation: 16 km/h (10 mph) from 161° (SSE)
  secondary swell:
    height m: 0.5
    direction degrees: 206
    direction cardinal: SSW
    period s: 5
  windswell:
    height m: 0.5
    period s: 3
    explanation: Local wind-generated waves (choppy, short-period)

Strike Mission
type: Organization