Surf Forecast for Barra Kwanza
type: Dataset
description: 10-day surf forecast with Strike Scores for Barra Kwanza, Luanda, Angola
about: Barra Kwanza
  type: TouristAttraction
  geo: GeoCoordinates
    latitude: -9.32042
    longitude: 13.15892
  description: Barra Kwanza sits at the mouth of the Kwanza River, about 80km south of Luanda. The rivermouth creates sandbars that shift with the seasons, producing both lefts and rights depending on conditions. The water can be murky after rains, but the waves can be excellent when the banks are in good shape.
summary:
  best day:
    date: 2026-08-10
    score: 64
    category: Fair
    explanation: Best day in the forecast: 2026-08-10 with a score of 64/100 (Fair)
  firing days count: 0
  overall recommendation: Marginal conditions: Average score 57/100. Surfable but not special. Consider other spots.
forecasts:
  date: 2026-08-05
  day index: 0
  strike score:
    final score: 55
    category: Fair
    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 219° is 6° off optimal 225°, still within prime range.
      swell size:
        score: 5
        out of: 25
        explanation: Too small: 0.9m is below minimum 1.0m. Waves will be weak/mushy.
      swell period:
        score: 25
        out of: 25
        explanation: Perfect period: 15s is at or above ideal 14s. Long-period groundswell with maximum power.
      wind:
        score: 5
        out of: 25
        explanation: Onshore/cross-shore: 13 km/h from 209° (SSW). Destroying wave quality. Offshore range: 60°-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: Surfable but not special at Barra Kwanza. The 0.9m swell from 219° is workable, but conditions aren't ideal. Fine if you're local, but not worth a dedicated trip.
  conditions:
    swell:
      height m: 0.9
      height ft: 3.0
      direction degrees: 219
      direction cardinal: SW
      period s: 15
      explanation: 0.9m (3.0ft) swell from 219° (SW) at 15s period
    wind:
      speed kmh: 13
      speed mph: 8.1
      direction degrees: 209
      direction cardinal: SSW
      explanation: 13 km/h (8 mph) from 209° (SSW)
forecasts:
  date: 2026-08-06
  day index: 1
  strike score:
    final score: 62
    category: Fair
    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 219° is 6° off optimal 225°, still within prime range.
      swell size:
        score: 11
        out of: 25
        explanation: Marginal size: 1.4m is 0.6m from ideal 2.0m.
      swell period:
        score: 23
        out of: 25
        explanation: Good period: 13s is 93% of ideal 14s. Clean, powerful groundswell.
      wind:
        score: 8
        out of: 25
        explanation: Onshore/cross-shore: 11 km/h from 224° (SW). Destroying wave quality. Offshore range: 60°-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: Surfable but not special at Barra Kwanza. The 1.4m swell from 219° is workable, but conditions aren't ideal. Fine if you're local, but not worth a dedicated trip.
  conditions:
    swell:
      height m: 1.4
      height ft: 4.6
      direction degrees: 219
      direction cardinal: SW
      period s: 13
      explanation: 1.4m (4.6ft) swell from 219° (SW) at 13s period
    wind:
      speed kmh: 11
      speed mph: 6.8
      direction degrees: 224
      direction cardinal: SW
      explanation: 11 km/h (7 mph) from 224° (SW)
forecasts:
  date: 2026-08-07
  day index: 2
  strike score:
    final score: 39
    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 217° is 8° off optimal 225°, workable but not ideal.
      swell size:
        score: 10
        out of: 25
        explanation: Marginal size: 1.3m is 0.7m from ideal 2.0m.
      swell period:
        score: 6
        out of: 25
        explanation: Moderate period: 10s meets minimum 10s but below ideal 14s. Some groundswell energy present.
      wind:
        score: 10
        out of: 25
        explanation: Onshore/cross-shore: 10 km/h from 225° (SW). Destroying wave quality. Offshore range: 60°-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 Barra Kwanza. Either swell direction (217°), size (1.3m), or wind (10 km/h from 225°) is unfavorable. Consider other spots or wait for better conditions.
  conditions:
    swell:
      height m: 1.3
      height ft: 4.3
      direction degrees: 217
      direction cardinal: SW
      period s: 10
      explanation: 1.3m (4.3ft) swell from 217° (SW) at 10s period
    wind:
      speed kmh: 10
      speed mph: 6.2
      direction degrees: 225
      direction cardinal: SW
      explanation: 10 km/h (6 mph) from 225° (SW)
    secondary swell:
      height m: 0.8
      direction degrees: 213
      direction cardinal: SSW
      period s: 13
forecasts:
  date: 2026-08-08
  day index: 3
  strike score:
    final score: 62
    category: Fair
    category emoji: 😐
    confidence: 0.92
    confidence explanation: High confidence (2-3 day forecast)
    breakdown:
      swell direction:
        score: 17
        out of: 25
        explanation: Moderate alignment: Swell from 213° is 12° off optimal 225°, workable but not ideal.
      swell size:
        score: 9
        out of: 25
        explanation: Marginal size: 1.2m is 0.8m from ideal 2.0m.
      swell period:
        score: 25
        out of: 25
        explanation: Perfect period: 14s is at or above ideal 14s. Long-period groundswell with maximum power.
    summary: Surfable but not special at Barra Kwanza. The 1.2m swell from 213° is workable, but conditions aren't ideal. Fine if you're local, but not worth a dedicated trip.
provider: Strike Mission
date published: 2026-08-05T00:33:35.946Z
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: 11
out of: 25
explanation: Onshore/cross-shore: 9 km/h from 249° (WSW). Destroying wave quality. Offshore range: 60°-130°.

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: 1.2
  height ft: 3.9
  direction degrees: 213
  direction cardinal: SSW
  period s: 14
  explanation: 1.2m (3.9ft) swell from 213° (SSW) at 14s period
wind:
  speed kmh: 9
  speed mph: 5.6
  direction degrees: 249
  direction cardinal: WSW
  explanation: 9 km/h (6 mph) from 249° (WSW)
secondary swell:
  height m: 0.8
  direction degrees: 215
  direction cardinal: SW
  period s: 7

date: 2026-08-09
day index: 4
strike score:
  final score: 63
  category: Fair
  category emoji: 😐
  confidence: 0.89
  confidence explanation: Moderate confidence (4-5 day forecast)
  breakdown:
    swell direction:
      score: 16
      out of: 25
      explanation: Moderate alignment: Swell from 212° is 13° off optimal 225°, workable but not ideal.
    swell size:
      score: 13
      out of: 25
      explanation: Marginal size: 1.6m is 0.4m from ideal 2.0m.
    swell period:
      score: 23
      out of: 25
      explanation: Good period: 13s is 93% of ideal 14s. Clean, powerful groundswell.
    wind:
      score: 11
      out of: 25
      explanation: Onshore/cross-shore: 9 km/h from 236° (SW). Destroying wave quality. Offshore range: 60°-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: Surfable but not special at Barra Kwanza. The 1.6m swell from 212° is workable, but conditions aren't ideal. Fine if you're local, but not worth a dedicated trip.
conditions:
  swell:
    height m: 1.6
    height ft: 5.2
    direction degrees: 212
    direction cardinal: SSW
    period s: 13
    explanation: 1.6m (5.2ft) swell from 212° (SSW) at 13s period
  wind:
    speed kmh: 9
    speed mph: 5.6
    direction degrees: 236
    direction cardinal: SW
    explanation: 9 km/h (6 mph) from 236° (SW)

date: 2026-08-10
day index: 5
strike score:
  final score: 64
  category: Fair
  category emoji: 😐
  confidence: 0.86
  confidence explanation: Moderate confidence (4-5 day forecast)
  breakdown:
    swell direction:
      score: 15
      out of: 25
      explanation: Moderate alignment: Swell from 209° is 16° off optimal 225°, workable but not ideal.
    swell size:
      score: 13
      out of: 25
      explanation: Marginal size: 1.6m is 0.4m from ideal 2.0m.
    swell period:
      score: 25
      out of: 25
      explanation: Perfect period: 14s is at or above ideal 14s. Long-period groundswell with maximum power.
    wind:
      score: 11
      out of: 25
      explanation: Onshore/cross-shore: 9 km/h from 261° (W). Destroying wave quality. Offshore range: 60°-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: Surfable but not special at Barra Kwanza. The 1.6m swell from 209° is workable, but conditions aren't ideal. Fine if you're local, but not worth a dedicated trip.
conditions:
  swell:
    height m: 1.6
    height ft: 5.2
    direction degrees: 209
    direction cardinal: SSW
    period s: 14
    explanation: 1.6m (5.2ft) swell from 209° (SSW) at 14s period
  wind:
    speed kmh: 9
    speed mph: 5.6
    direction degrees: 261
    direction cardinal: W
    explanation: 9 km/h (6 mph) from 261° (W)

date: 2026-08-11
day index: 6
strike score:
  final score: 64
  category: Fair
  category emoji: 😐
  confidence: 0.83
  confidence explanation: Low confidence (6-7 day forecast)
  breakdown:
    swell direction:
      score: 16
      out of: 25
      explanation: Moderate alignment: Swell from 212° is 13° off optimal 225°, workable but not ideal.
    swell size:
      score: 12
      out of: 25
      explanation: Marginal size: 1.5m is 0.5m from ideal 2.0m.
    swell period:
      score: 23
      out of: 25
      explanation: Good period: 13s is 93% of ideal 14s. Clean, powerful groundswell.
    wind:
      score: 13
      out of: 25
      explanation: Onshore/cross-shore: 8 km/h from 300° (WNW). Destroying wave quality. Offshore range: 60°-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: Surfable but not special at Barra Kwanza. The 1.5m swell from 212° is workable, but conditions aren't ideal. Fine if you're local, but not worth a dedicated trip.
conditions:
  swell:
    height m: 1.5
    height ft: 4.9
    direction degrees: 212
    direction cardinal: SSW
    period s: 13
    explanation: 1.5m (4.9ft) swell from 212° (SSW) at 13s period
  wind:
    speed kmh: 8
    speed mph: 5.0
    direction degrees: 300
    direction cardinal: WNW
    explanation: 8 km/h (5 mph) from 300° (WNW)

date: 2026-08-12
day index: 7
strike score:
  final score: 63
  category: Fair
  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 218° is 7° off optimal 225°, still within prime range.
    swell size:
      score: 9
      out of: 25
      explanation: Marginal size: 1.1m is 0.9m from ideal 2.0m.
    swell period:
      score: 23
      out of: 25
      explanation: Good period: 13s is 93% of ideal 14s. Clean, powerful groundswell.
    wind:
      score: 11
      out of: 25
      explanation: Onshore/cross-shore: 9 km/h from 227° (SW). Destroying wave quality. Offshore range: 60°-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: Surfable but not special at Barra Kwanza. The 1.1m swell from 218° is workable, but conditions aren't ideal. Fine if you're local, but not worth a dedicated trip.
conditions:
  swell:
    height m: 1.1
    height ft: 3.6
    direction degrees: 218
    direction cardinal: SW
    period s: 13
    explanation: 1.1m (3.6ft) swell from 218° (SW) at 13s period
  wind:
    speed kmh: 9
    speed mph: 5.6
    direction degrees: 227
    direction cardinal: SW
    explanation: 9 km/h (6 mph) from 227° (SW)

date: 2026-08-13
day index: 8
strike score:
  final score: 44
  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 229° is 4° off optimal 225°, still within prime range.
    swell size:
      score: 3
      out of: 25
      explanation: Too small: 0.8m is below minimum 1.0m. Waves will be weak/mushy.
    swell period:
      score: 25
      out of: 25
      explanation: Perfect period: 16s is at or above ideal 14s. Long-period groundswell with maximum power.
    wind:
      score: 7
      out of: 25
      explanation: Onshore/cross-shore: 11 km/h from 273° (W). Destroying wave quality. Offshore range: 60°-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 Barra Kwanza. Either swell direction (229°), size (0.8m), or wind (11 km/h from 273°) is unfavorable. Consider other spots or wait for better conditions.
conditions:
  swell:
    height m: 0.8
    height ft: 2.6
    direction degrees: 229
    direction cardinal: SW
    period s: 16
    explanation: 0.8m (2.6ft) swell from 229° (SW) at 16s period
  wind:
    speed kmh: 11
    speed mph: 6.8
    direction degrees: 273
    direction cardinal: W
    explanation: 11 km/h (7 mph) from 273° (W)
  secondary swell:
    height m: 0.5
    direction degrees: 214
    direction cardinal: SW
    period s: 12

date: 2026-08-14
day index: 9
strike score:
  final score: 55
  category: Fair
  category emoji: 😐
  confidence: 0.8
  confidence explanation: Very low confidence (8-10 day forecast, conditions may change)
  breakdown:
    swell direction:
      score: 14
      out of: 25
      explanation: Moderate alignment: Swell from 243° is 18° off optimal 225°, workable but not ideal.
    swell size:
      score: 8
      out of: 25
      explanation: Marginal size: 1.0m is 1.0m from ideal 2.0m.
    swell period:
      score: 25
      out of: 25
      explanation: Perfect period: 16s is at or above ideal 14s. Long-period groundswell with maximum power.
    wind:
      score: 8
      out of: 25
      explanation: Onshore/cross-shore: 11 km/h from 221° (SW). Destroying wave quality. Offshore range: 60°-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: Surfable but not special at Barra Kwanza. The 1.0m 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: 1
    height ft: 3.3
    direction degrees: 243
    direction cardinal: WSW
    period s: 16
    explanation: 1.0m (3.3ft) swell from 243° (WSW) at 16s period
  wind:
    speed kmh: 11
    speed mph: 6.8
    direction degrees: 221
    direction cardinal: SW
    explanation: 11 km/h (7 mph) from 221° (SW)

Strike Mission
type: Organization