Surf Forecast for Beng Bengs
type: Dataset
description: 10-day surf forecast with Strike Scores for Beng Bengs, Mentawai, Indonesia
about: Beng Bengs
  type: TouristAttraction
  geo: GeoCoordinates
    latitude: -2.9417
    longitude: 99.7083
  description: Beng Bengs is the friendly left-hander sitting just up the channel from Macaronis, offering a refreshing counterpoint to its world-famous neighbor. Where Maccas is a precise, hollow machine, Beng Bengs is more forgiving—a rippable wall with occasional cover-up sections that welcomes progressive surfing and experimentation. When the Macaronis lineup is stacked with chargers, Beng Bengs provides breathing room and quality waves that are often overlooked. It's become a favorite among Mentawai regulars who know that scoring uncrowded perfection is just a short paddle away.
summary:
  best day:
    date: 2026-08-07
    score: 75
    category: Good
    explanation: Best day in the forecast: 2026-08-07 with a score of 75/100 (Good)
  firing days count: 0
  overall recommendation: Fair recommendation: Beng Bengs has 4 Good days but no Firing days. Decent for a local session.
forecasts:
  date: 2026-08-05
  day index: 0
  strike score:
    final score: 50
    category: Fair
    category emoji: 😐
    confidence: 1
    confidence explanation: Very high confidence (0-1 day forecast)
    breakdown:
      swell direction:
        score: 11
        out of: 25
        explanation: Moderate alignment: Swell from 234° is 24° off optimal 210°, workable but not ideal.
      swell size:
        score: 20
        out of: 25
        explanation: Good size: 1.8m is within 15% of ideal 1.6m.
      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: 5
        out of: 25
        explanation: Onshore/cross-shore: 12 km/h from 330° (NNW). Destroying wave quality. Offshore range: 70°-150°.
    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: Surfable but not special at Beng Bengs. The 1.8m swell from 234° is workable, but conditions aren't ideal. Fine if you're local, but not worth a dedicated trip.
  conditions:
    swell:
      height m: 1.8
      height ft: 5.9
      direction degrees: 234
      direction cardinal: SW
      period s: 14
      explanation: 1.8m (5.9ft) swell from 234° (SW) at 14s period
    wind:
      speed kmh: 12
      speed mph: 7.5
      direction degrees: 330
      direction cardinal: NNW
      explanation: 12 km/h (7 mph) from 330° (NNW)
    secondary swell:
      height m: 1.3
      direction degrees: 224
      direction cardinal: SW
      period s: 14
forecasts:
  date: 2026-08-06
  day index: 1
  strike score:
    final score: 43
    category: Poor
    category emoji: 💤
    confidence: 1
    confidence explanation: Very high confidence (0-1 day forecast)
    breakdown:
      swell direction:
        score: 17
        out of: 25
        explanation: Moderate alignment: Swell from 198° is 12° off optimal 210°, workable but not ideal.
      swell size:
        score: 15
        out of: 25
        explanation: Too big: 2.6m exceeds maximum 2.5m. Risk of closeouts.
      swell period:
        score: 23
        out of: 25
        explanation: Good period: 17s is 121% of ideal 14s. Clean, powerful groundswell.
      wind:
        score: 3
        out of: 25
        explanation: Onshore/cross-shore: 14 km/h from 360° (N). Destroying wave quality. Offshore range: 70°-150°.
    adjustments:
      wind history:
        adjustment: -7
        groomed: false
        morning sickness: true
        explanation: -7 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 Beng Bengs. Either swell direction (198°), size (2.6m), or wind (14 km/h from 360°) is unfavorable. Consider other spots or wait for better conditions.
  conditions:
    swell:
      height m: 2.6
      height ft: 8.5
      direction degrees: 198
      direction cardinal: SSW
      period s: 17
      explanation: 2.6m (8.5ft) swell from 198° (SSW) at 17s period
    wind:
      speed kmh: 14
      speed mph: 8.7
      direction degrees: 360
      direction cardinal: N
      explanation: 14 km/h (9 mph) from 360° (N)
    secondary swell:
      height m: 1
      direction degrees: 296
      direction cardinal: WNW
      period s: 6
forecasts:
  date: 2026-08-07
  day index: 2
  strike score:
    final score: 75
    category: Good
    category emoji: ✅
    confidence: 0.95
    confidence explanation: High confidence (2-3 day forecast)
    breakdown:
      swell direction:
        score: 15
        out of: 25
        explanation: Moderate alignment: Swell from 194° is 16° off optimal 210°, workable but not ideal.
      swell size:
        score: 15
        out of: 25
        explanation: Too big: 2.6m exceeds maximum 2.5m. Risk of closeouts.
      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: 25
        out of: 25
        explanation: Light offshore: 7 km/h from 117° (ESE). Grooming the wave face beautifully.
    adjustments:
      wind history:
        adjustment: -4
        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: Good surfable conditions at Beng Bengs. 2.6m swell from 194° with manageable wind. Solid session guaranteed.
  conditions:
    swell:
      height m: 2.6
      height ft: 8.5
      direction degrees: 194
      direction cardinal: SSW
      period s: 16
      explanation: 2.6m (8.5ft) swell from 194° (SSW) at 16s period
    wind:
      speed kmh: 7
      speed mph: 4.3
      direction degrees: 117
      direction cardinal: ESE
      explanation: 7 km/h (4 mph) from 117° (ESE)
    secondary swell:
      height m: 0.9
      direction degrees: 281
      direction cardinal: W
      period s: 8
forecasts:
  date: 2026-08-08
  day index: 3
  strike score:
    final score: 66
    category: Good
    category emoji: ✅
    confidence: 0.92
    confidence explanation: High confidence (2-3 day forecast)
    summary: Good surfable conditions at Beng Bengs. 2.7m swell from 193° with moderate wind. Solid session guaranteed.
provider: Strike Mission
date published: 2026-08-05T00:29:54.349Z
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)

swell direction:
  score: 14
  out of: 25
  explanation: Moderate alignment: Swell from 193° is 17° off optimal 210°, workable but not ideal.
swell size:
  score: 13
  out of: 25
  explanation: Too big: 2.7m exceeds maximum 2.5m. Risk of closeouts.
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: 15
  out of: 25
  explanation: Strong offshore: 21 km/h from 137° (SE). Grooming but may make paddling difficult.

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: 2.7
  height ft: 8.9
  direction degrees: 193
  direction cardinal: SSW
  period s: 16
  explanation: 2.7m (8.9ft) swell from 193° (SSW) at 16s period
wind:
  speed kmh: 21
  speed mph: 13.0
  direction degrees: 137
  direction cardinal: SE
  explanation: 21 km/h (13 mph) from 137° (SE)
secondary swell:
  height m: 0.6
  direction degrees: 290
  direction cardinal: WNW
  period s: 7
windswell:
  height m: 0.4
  period s: 2
  explanation: Local wind-generated waves (choppy, short-period)

date: 2026-08-09
day index: 4
strike score:
  final score: 51
  category: Fair
  category emoji: 😐
  confidence: 0.89
  confidence explanation: Moderate confidence (4-5 day forecast)
  breakdown:
    swell direction:
      score: 14
      out of: 25
      explanation: Moderate alignment: Swell from 192° is 18° off optimal 210°, workable but not ideal.
    swell size:
      score: 17
      out of: 25
      explanation: Marginal size: 2.5m is 0.9m from ideal 1.6m.
    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: 1
      out of: 25
      explanation: Onshore/cross-shore: 23 km/h from 156° (SSE). Destroying wave quality. Offshore range: 70°-150°.
  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 Beng Bengs. The 2.5m swell from 192° is workable, but conditions aren't ideal. Fine if you're local, but not worth a dedicated trip.
conditions:
  swell:
    height m: 2.5
    height ft: 8.2
    direction degrees: 192
    direction cardinal: SSW
    period s: 16
    explanation: 2.5m (8.2ft) swell from 192° (SSW) at 16s period
  wind:
    speed kmh: 23
    speed mph: 14.3
    direction degrees: 156
    direction cardinal: SSE
    explanation: 23 km/h (14 mph) from 156° (SSE)
  secondary swell:
    height m: 0.9
    direction degrees: 164
    direction cardinal: SSE
    period s: 5
  windswell:
    height m: 0.7
    period s: 3
    explanation: Local wind-generated waves (choppy, short-period)

date: 2026-08-10
day index: 5
strike score:
  final score: 51
  category: Fair
  category emoji: 😐
  confidence: 0.86
  confidence explanation: Moderate confidence (4-5 day forecast)
  breakdown:
    swell direction:
      score: 11
      out of: 25
      explanation: Moderate alignment: Swell from 185° is 25° off optimal 210°, workable but not ideal.
    swell size:
      score: 19
      out of: 25
      explanation: Marginal size: 2.3m is 0.6m from ideal 1.6m.
    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: 1
      out of: 25
      explanation: Onshore/cross-shore: 18 km/h from 162° (SSE). Destroying wave quality. Offshore range: 70°-150°.
  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: Surfable but not special at Beng Bengs. The 2.3m swell from 185° is workable, but conditions aren't ideal. Fine if you're local, but not worth a dedicated trip.
conditions:
  swell:
    height m: 2.3
    height ft: 7.5
    direction degrees: 185
    direction cardinal: S
    period s: 15
    explanation: 2.3m (7.5ft) swell from 185° (S) at 15s period
  wind:
    speed kmh: 18
    speed mph: 11.2
    direction degrees: 162
    direction cardinal: SSE
    explanation: 18 km/h (11 mph) from 162° (SSE)
  secondary swell:
    height m: 1.3
    direction degrees: 186
    direction cardinal: S
    period s: 17

date: 2026-08-11
day index: 6
strike score:
  final score: 47
  category: Fair
  category emoji: 😐
  confidence: 0.83
  confidence explanation: Low confidence (6-7 day forecast)
  breakdown:
    swell direction:
      score: 9
      out of: 25
      explanation: Poor alignment: Swell from 180° is 30° off optimal 210°, barely within workable range 190°-240°.
    swell size:
      score: 4
      out of: 25
      explanation: Too big: 3.4m exceeds maximum 2.5m. Risk of closeouts.
    swell period:
      score: 23
      out of: 25
      explanation: Good period: 17s is 121% of ideal 14s. Clean, powerful groundswell.
    wind:
      score: 8
      out of: 25
      explanation: Strong offshore: 21 km/h from 144° (SE). Grooming but may make paddling difficult.
  adjustments:
    wind history:
      adjustment: -7
      groomed: false
      morning sickness: true
      explanation: -7 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: Surfable but not special at Beng Bengs. The 3.4m swell from 180° is workable, but conditions aren't ideal. Fine if you're local, but not worth a dedicated trip.
conditions:
  swell:
    height m: 3.4
    height ft: 11.2
    direction degrees: 180
    direction cardinal: S
    period s: 17
    explanation: 3.4m (11.2ft) swell from 180° (S) at 17s period
  wind:
    speed kmh: 21
    speed mph: 13.0
    direction degrees: 144
    direction cardinal: SE
    explanation: 21 km/h (13 mph) from 144° (SE)
  secondary swell:
    height m: 0.4
    direction degrees: 263
    direction cardinal: W
    period s: 11
  windswell:
    height m: 0.5
    period s: 3
    explanation: Local wind-generated waves (choppy, short-period)

date: 2026-08-12
day index: 7
strike score:
  final score: 48
  category: Fair
  category emoji: 😐
  confidence: 0.8
  confidence explanation: Low confidence (6-7 day forecast)
  breakdown:
    swell direction:
      score: 9
      out of: 25
      explanation: Poor alignment: Swell from 179° is 31° off optimal 210°, barely within workable range 190°-240°.
    swell size:
      score: 7
      out of: 25
      explanation: Too big: 3.1m exceeds maximum 2.5m. Risk of closeouts.
    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: 4
      out of: 25
      explanation: Strong offshore: 27 km/h from 148° (SSE). Grooming but may make paddling difficult.
  adjustments:
    wind history:
      adjustment: -4
      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 Beng Bengs. The 3.1m swell from 179° is workable, but conditions aren't ideal. Fine if you're local, but not worth a dedicated trip.
conditions:
  swell:
    height m: 3.1
    height ft: 10.2
    direction degrees: 179
    direction cardinal: S
    period s: 16
    explanation: 3.1m (10.2ft) swell from 179° (S) at 16s period
  wind:
    speed kmh: 27
    speed mph: 16.8
    direction degrees: 148
    direction cardinal: SSE
    explanation: 27 km/h (17 mph) from 148° (SSE)
  windswell:
    height m: 0.9
    period s: 4
    explanation: Local wind-generated waves (choppy, short-period)

date: 2026-08-13
day index: 8
strike score:
  final score: 65
  category: Good
  category emoji: ✅
  confidence: 0.8
  confidence explanation: Very low confidence (8-10 day forecast, conditions may change)
  breakdown:
    swell direction:
      score: 8
      out of: 25
      explanation: Poor alignment: Swell from 177° is 33° off optimal 210°, barely within workable range 190°-240°.
    swell size:
      score: 17
      out of: 25
      explanation: Marginal size: 2.5m is 0.9m from ideal 1.6m.
    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: 12
      out of: 25
      explanation: Strong offshore: 24 km/h from 140° (SE). Grooming but may make paddling difficult.
  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: Good surfable conditions at Beng Bengs. 2.5m swell from 177° with moderate wind. Solid session guaranteed.
conditions:
  swell:
    height m: 2.5
    height ft: 8.2
    direction degrees: 177
    direction cardinal: S
    period s: 16
    explanation: 2.5m (8.2ft) swell from 177° (S) at 16s period
  wind:
    speed kmh: 24
    speed mph: 14.9
    direction degrees: 140
    direction cardinal: SE
    explanation: 24 km/h (15 mph) from 140° (SE)
  secondary swell:
    height m: 1.4
    direction degrees: 178
    direction cardinal: S
    period s: 16
  windswell:
    height m: 0.6
    period s: 3
    explanation: Local wind-generated waves (choppy, short-period)

date: 2026-08-14
day index: 9
strike score:
  final score: 68
  category: Good
  category emoji: ✅
  confidence: 0.8
  confidence explanation: Very low confidence (8-10 day forecast, conditions may change)
  breakdown:
    swell direction:
      score: 9
      out of: 25
      explanation: Poor alignment: Swell from 178° is 32° off optimal 210°, barely within workable range 190°-240°.
    swell size:
      score: 18
      out of: 25
      explanation: Marginal size: 2.4m is 0.8m from ideal 1.6m.
    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: 7
      out of: 25
      explanation: Moderate offshore: 19 km/h from 148° (SSE). Still grooming but noticeable wind.
  adjustments:
    wind history:
      adjustment: 6
      groomed: true
      morning sickness: false
      explanation: +6 points: Multiple days of offshore wind have groomed the ocean surface, creating ultra-clean conditions.
    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: Good surfable conditions at Beng Bengs. 2.4m swell from 178° with moderate wind. Solid session guaranteed.
conditions:
  swell:
    height m: 2.4
    height ft: 7.9
    direction degrees: 178
    direction cardinal: S
    period s: 15
    explanation: 2.4m (7.9ft) swell from 178° (S) at 15s period
  wind:
    speed kmh: 19
    speed mph: 11.8
    direction degrees: 148
    direction cardinal: SSE
    explanation: 19 km/h (12 mph) from 148° (SSE)
  secondary swell:
    height m: 1.1
    direction degrees: 171
    direction cardinal: S
    period s: 16

Strike Mission
type: Organization