Surf Forecast for Praia Grande SFS
type: Dataset
description: 10-day surf forecast with Strike Scores for Praia Grande SFS, São Francisco do Sul, SC, Brazil
about: Praia Grande SFS
  type: TouristAttraction
  geo: GeoCoordinates
    latitude: -26.2333
    longitude: -48.6333
  description: Praia Grande in São Francisco do Sul offers reliable surf in a charming colonial island town setting. The beach picks up swells from multiple directions and produces consistent peaks year-round. The historic town behind the beach adds cultural interest to any surf trip.
summary:
  best day:
    date: 2026-08-11
    score: 19
    category: Poor
    explanation: Best day in the forecast: 2026-08-11 with a score of 19/100 (Poor)
  firing days count: 0
  overall recommendation: Poor conditions overall: Average score 10/100. Look for spots with better forecasts.
forecasts:
  date: 2026-08-05
  day index: 0
  strike score:
    final score: 9
    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 89° is outside workable range 112°-200°. Wrong swell direction for this spot.
      swell size:
        score: 3
        out of: 25
        explanation: Too small: 0.7m is below minimum 0.9m. Waves will be weak/mushy.
      swell period:
        score: 6
        out of: 25
        explanation: Moderate period: 8s meets minimum 8s but below ideal 12s. Some groundswell energy present.
      wind:
        score: 22
        out of: 25
        explanation: Glassy: Wind speed 3 km/h (light/variable). Perfect mirror-like surface.
    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 Praia Grande SFS. Either swell direction (89°), size (0.7m), or wind (3 km/h from 97°) is unfavorable. Consider other spots or wait for better conditions.
  conditions:
    swell:
      height m: 0.7
      height ft: 2.3
      direction degrees: 89
      direction cardinal: E
      period s: 8
      explanation: 0.7m (2.3ft) swell from 89° (E) at 8s period
    wind:
      speed kmh: 3
      speed mph: 1.9
      direction degrees: 97
      direction cardinal: E
      explanation: 3 km/h (2 mph) from 97° (E)
forecasts:
  date: 2026-08-06
  day index: 1
  strike score:
    final score: 11
    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 88° is outside workable range 112°-200°. Wrong swell direction for this spot.
      swell size:
        score: 3
        out of: 25
        explanation: Too small: 0.7m is below minimum 0.9m. Waves will be weak/mushy.
      swell period:
        score: 6
        out of: 25
        explanation: Moderate period: 8s meets minimum 8s but below ideal 12s. Some groundswell energy present.
      wind:
        score: 24
        out of: 25
        explanation: Light offshore: 6 km/h from 23° (NNE). 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 Praia Grande SFS. Either swell direction (88°), size (0.7m), or wind (6 km/h from 23°) is unfavorable. Consider other spots or wait for better conditions.
  conditions:
    swell:
      height m: 0.7
      height ft: 2.3
      direction degrees: 88
      direction cardinal: E
      period s: 8
      explanation: 0.7m (2.3ft) swell from 88° (E) at 8s period
    wind:
      speed kmh: 6
      speed mph: 3.7
      direction degrees: 23
      direction cardinal: NNE
      explanation: 6 km/h (4 mph) from 23° (NNE)
forecasts:
  date: 2026-08-07
  day index: 2
  strike score:
    final score: 0
    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 84° is outside workable range 112°-200°. Wrong swell direction for this spot.
      swell size:
        score: 3
        out of: 25
        explanation: Too small: 0.7m is below minimum 0.9m. Waves will be weak/mushy.
      swell period:
        score: 6
        out of: 25
        explanation: Moderate period: 8s meets minimum 8s but below ideal 12s. Some groundswell energy present.
      wind:
        score: 9
        out of: 25
        explanation: Onshore/cross-shore: 11 km/h from 119° (ESE). Destroying wave quality. Offshore range: 315°-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 Praia Grande SFS. Either swell direction (84°), size (0.7m), or wind (11 km/h from 119°) is unfavorable. Consider other spots or wait for better conditions.
  conditions:
    swell:
      height m: 0.7
      height ft: 2.3
      direction degrees: 84
      direction cardinal: E
      period s: 8
      explanation: 0.7m (2.3ft) swell from 84° (E) at 8s period
    wind:
      speed kmh: 11
      speed mph: 6.8
      direction degrees: 119
      direction cardinal: ESE
      explanation: 11 km/h (7 mph) from 119° (ESE)
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: 0
        out of: 25
        explanation: No alignment: Swell from 84° is outside workable range 112°-200°. Wrong swell direction for this spot.
      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: 8
        out of: 25
        explanation: Moderate period: 9s meets minimum 8s but below ideal 12s. Some groundswell energy present.
      wind:
        score: 17
        out of: 25
        explanation: Moderate offshore: 10 km/h from 44° (NE). Still grooming but noticeable wind.
    summary: Poor conditions at Praia Grande SFS. Either swell direction (84°), size (0.8m), or wind (10 km/h from 44°) is unfavorable. Consider other spots or wait for better conditions.
provider: Strike Mission
date published: 2026-08-05T03:15:57.151Z
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: 0.8
  height ft: 2.6
  direction degrees: 84
  direction cardinal: E
  period s: 9
  explanation: 0.8m (2.6ft) swell from 84° (E) at 9s period
wind:
  speed kmh: 10
  speed mph: 6.2
  direction degrees: 44
  direction cardinal: NE
  explanation: 10 km/h (6 mph) from 44° (NE)

date: 2026-08-09
day index: 4
strike score:
  final score: 13
  category: Poor
  category emoji: 💤
  confidence: 0.89
  confidence explanation: Moderate confidence (4-5 day forecast)
  breakdown:
    swell direction:
      score: 13
      out of: 25
      explanation: Moderate alignment: Swell from 138° is 19° off optimal 157°, 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: 4
      out of: 25
      explanation: Short period: 7s is below minimum 8s. Windswell-dominated (choppy, weak waves).
    wind:
      score: 5
      out of: 25
      explanation: Onshore/cross-shore: 12 km/h from 136° (SE). Destroying wave quality. Offshore range: 315°-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 Praia Grande SFS. Either swell direction (138°), size (0.8m), or wind (12 km/h from 136°) is unfavorable. Consider other spots or wait for better conditions.
conditions:
  swell:
    height m: 0.8
    height ft: 2.6
    direction degrees: 138
    direction cardinal: SE
    period s: 7
    explanation: 0.8m (2.6ft) swell from 138° (SE) at 7s period
  wind:
    speed kmh: 12
    speed mph: 7.5
    direction degrees: 136
    direction cardinal: SE
    explanation: 12 km/h (7 mph) from 136° (SE)
  windswell:
    height m: 0.3
    period s: 2
    explanation: Local wind-generated waves (choppy, short-period)

date: 2026-08-10
day index: 5
strike score:
  final score: 0
  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 87° is outside workable range 112°-200°. Wrong swell direction for this spot.
    swell size:
      score: 3
      out of: 25
      explanation: Too small: 0.7m is below minimum 0.9m. 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: 9
      out of: 25
      explanation: Onshore/cross-shore: 10 km/h from 213° (SSW). Destroying wave quality. Offshore range: 315°-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 Praia Grande SFS. Either swell direction (87°), size (0.7m), or wind (10 km/h from 213°) is unfavorable. Consider other spots or wait for better conditions.
conditions:
  swell:
    height m: 0.7
    height ft: 2.3
    direction degrees: 87
    direction cardinal: E
    period s: 9
    explanation: 0.7m (2.3ft) swell from 87° (E) at 9s period
  wind:
    speed kmh: 10
    speed mph: 6.2
    direction degrees: 213
    direction cardinal: SSW
    explanation: 10 km/h (6 mph) from 213° (SSW)

date: 2026-08-11
day index: 6
strike score:
  final score: 19
  category: Poor
  category emoji: 💤
  confidence: 0.83
  confidence explanation: Low confidence (6-7 day forecast)
  breakdown:
    swell direction:
      score: 14
      out of: 25
      explanation: Moderate alignment: Swell from 140° is 17° off optimal 157°, workable but not ideal.
    swell size:
      score: 3
      out of: 25
      explanation: Too small: 0.7m is below minimum 0.9m. 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: 7
      out of: 25
      explanation: Onshore/cross-shore: 11 km/h from 174° (S). Destroying wave quality. Offshore range: 315°-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 Praia Grande SFS. Either swell direction (140°), size (0.7m), or wind (11 km/h from 174°) is unfavorable. Consider other spots or wait for better conditions.
conditions:
  swell:
    height m: 0.7
    height ft: 2.3
    direction degrees: 140
    direction cardinal: SE
    period s: 9
    explanation: 0.7m (2.3ft) swell from 140° (SE) at 9s period
  wind:
    speed kmh: 11
    speed mph: 6.8
    direction degrees: 174
    direction cardinal: S
    explanation: 11 km/h (7 mph) from 174° (S)

date: 2026-08-12
day index: 7
strike score:
  final score: 15
  category: Poor
  category emoji: 💤
  confidence: 0.8
  confidence explanation: Low confidence (6-7 day forecast)
  breakdown:
    swell direction:
      score: 5
      out of: 25
      explanation: Poor alignment: Swell from 109° is 48° off optimal 157°, barely within workable range 112°-200°.
    swell size:
      score: 8
      out of: 25
      explanation: Marginal size: 0.9m is 0.5m from ideal 1.4m.
    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 210° (SSW). Destroying wave quality. Offshore range: 315°-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 Praia Grande SFS. Either swell direction (109°), size (0.9m), or wind (10 km/h from 210°) is unfavorable. Consider other spots or wait for better conditions.
conditions:
  swell:
    height m: 0.9
    height ft: 3.0
    direction degrees: 109
    direction cardinal: ESE
    period s: 7
    explanation: 0.9m (3.0ft) swell from 109° (ESE) at 7s period
  wind:
    speed kmh: 10
    speed mph: 6.2
    direction degrees: 210
    direction cardinal: SSW
    explanation: 10 km/h (6 mph) from 210° (SSW)

date: 2026-08-13
day index: 8
strike score:
  final score: 14
  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 97° is outside workable range 112°-200°. Wrong swell direction for this spot.
    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: 6
      out of: 25
      explanation: Moderate period: 8s meets minimum 8s but below ideal 12s. Some groundswell energy present.
    wind:
      score: 21
      out of: 25
      explanation: Onshore/cross-shore: 6 km/h from 74° (ENE). Destroying wave quality. Offshore range: 315°-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 Praia Grande SFS. Either swell direction (97°), size (0.8m), or wind (6 km/h from 74°) is unfavorable. Consider other spots or wait for better conditions.
conditions:
  swell:
    height m: 0.8
    height ft: 2.6
    direction degrees: 97
    direction cardinal: E
    period s: 8
    explanation: 0.8m (2.6ft) swell from 97° (E) at 8s period
  wind:
    speed kmh: 6
    speed mph: 3.7
    direction degrees: 74
    direction cardinal: ENE
    explanation: 6 km/h (4 mph) from 74° (ENE)

date: 2026-08-14
day index: 9
strike score:
  final score: 8
  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 97° is outside workable range 112°-200°. Wrong swell direction for this spot.
    swell size:
      score: 2
      out of: 25
      explanation: Too small: 0.5m is below minimum 0.9m. Waves will be weak/mushy.
    swell period:
      score: 6
      out of: 25
      explanation: Moderate period: 8s meets minimum 8s but below ideal 12s. Some groundswell energy present.
    wind:
      score: 23
      out of: 25
      explanation: Onshore/cross-shore: 5 km/h from 60° (ENE). Destroying wave quality. Offshore range: 315°-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 Praia Grande SFS. Either swell direction (97°), size (0.5m), or wind (5 km/h from 60°) is unfavorable. Consider other spots or wait for better conditions.
conditions:
  swell:
    height m: 0.5
    height ft: 1.6
    direction degrees: 97
    direction cardinal: E
    period s: 8
    explanation: 0.5m (1.6ft) swell from 97° (E) at 8s period
  wind:
    speed kmh: 5
    speed mph: 3.1
    direction degrees: 60
    direction cardinal: ENE
    explanation: 5 km/h (3 mph) from 60° (ENE)

Strike Mission
type: Organization