Surf Forecast for Icelands
type: Dataset
description: 10-day surf forecast with Strike Scores for Icelands, North Sipora, Mentawai, Indonesia
about: Icelands
  type: TouristAttraction
  geo: GeoCoordinates
    latitude: -2.348
    longitude: 99.568
  description: Icelands (also known as Omak Tidur) is the premier big-wave location in the Mentawai Islands, capable of handling swells up to 20+ feet. Located in North Sipora, this powerful left reef break only wakes up on the largest W-SW swells and rewards expert surfers with massive, hollow waves. The wave is strictly for experienced big-wave riders, as wipeouts are extremely consequential on the deep-water reef. One of the most awe-inspiring waves in all of Indonesia when conditions align.
summary:
  best day:
    date: 2026-08-07
    score: 64
    category: Fair
    explanation: Best day in the forecast: 2026-08-07 with a score of 64/100 (Fair)
  firing days count: 0
  overall recommendation: Poor conditions overall: Average score 37/100. Look for spots with better forecasts.
forecasts:
  date: 2026-08-05
  day index: 0
  strike score:
    final score: 37
    category: Poor
    category emoji: 💤
    confidence: 1
    confidence explanation: Very high confidence (0-1 day forecast)
    breakdown:
      swell direction:
        score: 3
        out of: 25
        explanation: Poor alignment: Swell from 194° is 51° off optimal 245°, barely within workable range 230°-260°.
      swell size:
        score: 5
        out of: 25
        explanation: Too small: 2.1m is below minimum 2.4m. Waves will be weak/mushy.
      swell period:
        score: 23
        out of: 25
        explanation: Good period: 15s is 94% of ideal 16s. Clean, powerful groundswell.
      wind:
        score: 17
        out of: 25
        explanation: Onshore/cross-shore: 7 km/h from 333° (NNW). Destroying wave quality. Offshore range: 60°-120°.
    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 Icelands. Either swell direction (194°), size (2.1m), or wind (7 km/h from 333°) is unfavorable. Consider other spots or wait for better conditions.
  conditions:
    swell:
      height m: 2.1
      height ft: 6.9
      direction degrees: 194
      direction cardinal: SSW
      period s: 15
      explanation: 2.1m (6.9ft) swell from 194° (SSW) at 15s period
    wind:
      speed kmh: 7
      speed mph: 4.3
      direction degrees: 333
      direction cardinal: NNW
      explanation: 7 km/h (4 mph) from 333° (NNW)
    secondary swell:
      height m: 1.2
      direction degrees: 240
      direction cardinal: WSW
      period s: 13
forecasts:
  date: 2026-08-06
  day index: 1
  strike score:
    final score: 48
    category: Fair
    category emoji: 😐
    confidence: 1
    confidence explanation: Very high confidence (0-1 day forecast)
    breakdown:
      swell direction:
        score: 6
        out of: 25
        explanation: Poor alignment: Swell from 200° is 45° off optimal 245°, barely within workable range 230°-260°.
      swell size:
        score: 11
        out of: 25
        explanation: Marginal size: 3.1m is 1.1m from ideal 4.3m.
      swell period:
        score: 25
        out of: 25
        explanation: Perfect period: 17s is at or above ideal 16s. Long-period groundswell with maximum power.
      wind:
        score: 12
        out of: 25
        explanation: Onshore/cross-shore: 9 km/h from 345° (NNW). Destroying wave quality. Offshore range: 60°-120°.
    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 Icelands. The 3.1m swell from 200° 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: 200
      direction cardinal: SSW
      period s: 17
      explanation: 3.1m (10.2ft) swell from 200° (SSW) at 17s period
    wind:
      speed kmh: 9
      speed mph: 5.6
      direction degrees: 345
      direction cardinal: NNW
      explanation: 9 km/h (6 mph) from 345° (NNW)
    secondary swell:
      height m: 1
      direction degrees: 288
      direction cardinal: WNW
      period s: 6
forecasts:
  date: 2026-08-07
  day index: 2
  strike score:
    final score: 64
    category: Fair
    category emoji: 😐
    confidence: 0.95
    confidence explanation: High confidence (2-3 day forecast)
    breakdown:
      swell direction:
        score: 5
        out of: 25
        explanation: Poor alignment: Swell from 197° is 48° off optimal 245°, barely within workable range 230°-260°.
      swell size:
        score: 11
        out of: 25
        explanation: Marginal size: 3.1m is 1.1m from ideal 4.3m.
      swell period:
        score: 25
        out of: 25
        explanation: Perfect period: 16s is at or above ideal 16s. Long-period groundswell with maximum power.
      wind:
        score: 25
        out of: 25
        explanation: Onshore/cross-shore: 4 km/h from 143° (SE). Destroying wave quality. Offshore range: 60°-120°.
    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 Icelands. The 3.1m swell from 197° 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: 197
      direction cardinal: SSW
      period s: 16
      explanation: 3.1m (10.2ft) swell from 197° (SSW) at 16s period
    wind:
      speed kmh: 4
      speed mph: 2.5
      direction degrees: 143
      direction cardinal: SE
      explanation: 4 km/h (2 mph) from 143° (SE)
    secondary swell:
      height m: 0.7
      direction degrees: 293
      direction cardinal: WNW
      period s: 7
forecasts:
  date: 2026-08-08
  day index: 3
  strike score:
    final score: 39
    category: Poor
    category emoji: 💤
    confidence: 0.92
    confidence explanation: High confidence (2-3 day forecast)
    summary: Poor conditions at Icelands. Either swell direction (193°), size (3.2m), or wind (11 km/h from 140°) is unfavorable. Consider other spots or wait for better conditions.
provider: Strike Mission
date published: 2026-08-04T23:50:12.450Z
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: 3
  out of: 25
  explanation: Poor alignment: Swell from 193° is 52° off optimal 245°, barely within workable range 230°-260°.
swell size:
  score: 11
  out of: 25
  explanation: Marginal size: 3.2m is 1.0m from ideal 4.3m.
swell period:
  score: 25
  out of: 25
  explanation: Perfect period: 16s is at or above ideal 16s. Long-period groundswell with maximum power.
wind:
  score: 11
  out of: 25
  explanation: Onshore/cross-shore: 11 km/h from 140° (SE). Destroying wave quality. Offshore range: 60°-120°.

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: 3.2
  height ft: 10.5
  direction degrees: 193
  direction cardinal: SSW
  period s: 16
  explanation: 3.2m (10.5ft) swell from 193° (SSW) at 16s period
wind:
  speed kmh: 11
  speed mph: 6.8
  direction degrees: 140
  direction cardinal: SE
  explanation: 11 km/h (7 mph) from 140° (SE)
secondary swell:
  height m: 0.5
  direction degrees: 294
  direction cardinal: WNW
  period s: 7

date: 2026-08-09
day index: 4
strike score:
  final score: 30
  category: Poor
  category emoji: 💤
  confidence: 0.89
  confidence explanation: Moderate confidence (4-5 day forecast)
  breakdown:
    swell direction:
      score: 2
      out of: 25
      explanation: Poor alignment: Swell from 192° is 53° off optimal 245°, barely within workable range 230°-260°.
    swell size:
      score: 10
      out of: 25
      explanation: Marginal size: 2.9m is 1.4m from ideal 4.3m.
    swell period:
      score: 25
      out of: 25
      explanation: Perfect period: 16s is at or above ideal 16s. Long-period groundswell with maximum power.
    wind:
      score: 5
      out of: 25
      explanation: Onshore/cross-shore: 14 km/h from 164° (SSE). Destroying wave quality. Offshore range: 60°-120°.
  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 Icelands. Either swell direction (192°), size (2.9m), or wind (14 km/h from 164°) is unfavorable. Consider other spots or wait for better conditions.
conditions:
  swell:
    height m: 2.9
    height ft: 9.5
    direction degrees: 192
    direction cardinal: SSW
    period s: 16
    explanation: 2.9m (9.5ft) swell from 192° (SSW) at 16s period
  wind:
    speed kmh: 14
    speed mph: 8.7
    direction degrees: 164
    direction cardinal: SSE
    explanation: 14 km/h (9 mph) from 164° (SSE)
  secondary swell:
    height m: 0.9
    direction degrees: 175
    direction cardinal: S
    period s: 6
  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: 32
  category: Poor
  category emoji: 💤
  confidence: 0.86
  confidence explanation: Moderate confidence (4-5 day forecast)
  breakdown:
    swell direction:
      score: 1
      out of: 25
      explanation: Poor alignment: Swell from 188° is 57° off optimal 245°, barely within workable range 230°-260°.
    swell size:
      score: 9
      out of: 25
      explanation: Marginal size: 2.7m is 1.5m from ideal 4.3m.
    swell period:
      score: 23
      out of: 25
      explanation: Good period: 15s is 94% of ideal 16s. Clean, powerful groundswell.
    wind:
      score: 11
      out of: 25
      explanation: Onshore/cross-shore: 11 km/h from 161° (SSE). Destroying wave quality. Offshore range: 60°-120°.
  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 Icelands. Either swell direction (188°), size (2.7m), or wind (11 km/h from 161°) is unfavorable. Consider other spots or wait for better conditions.
conditions:
  swell:
    height m: 2.7
    height ft: 8.9
    direction degrees: 188
    direction cardinal: S
    period s: 15
    explanation: 2.7m (8.9ft) swell from 188° (S) at 15s period
  wind:
    speed kmh: 11
    speed mph: 6.8
    direction degrees: 161
    direction cardinal: SSE
    explanation: 11 km/h (7 mph) from 161° (SSE)
  secondary swell:
    height m: 1.2
    direction degrees: 186
    direction cardinal: S
    period s: 17

date: 2026-08-11
day index: 6
strike score:
  final score: 37
  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 182° is outside workable range 230°-260°. Wrong swell direction for this spot.
    swell size:
      score: 14
      out of: 25
      explanation: Marginal size: 3.8m is 0.5m from ideal 4.3m.
    swell period:
      score: 25
      out of: 25
      explanation: Perfect period: 17s is at or above ideal 16s. Long-period groundswell with maximum power.
    wind:
      score: 13
      out of: 25
      explanation: Onshore/cross-shore: 10 km/h from 136° (SE). Destroying wave quality. Offshore range: 60°-120°.
  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 Icelands. Either swell direction (182°), size (3.8m), or wind (10 km/h from 136°) is unfavorable. Consider other spots or wait for better conditions.
conditions:
  swell:
    height m: 3.8
    height ft: 12.5
    direction degrees: 182
    direction cardinal: S
    period s: 17
    explanation: 3.8m (12.5ft) swell from 182° (S) at 17s period
  wind:
    speed kmh: 10
    speed mph: 6.2
    direction degrees: 136
    direction cardinal: SE
    explanation: 10 km/h (6 mph) from 136° (SE)
  secondary swell:
    height m: 0.4
    direction degrees: 264
    direction cardinal: W
    period s: 11
  windswell:
    height m: 0.3
    period s: 2
    explanation: Local wind-generated waves (choppy, short-period)

date: 2026-08-12
day index: 7
strike score:
  final score: 20
  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 181° is outside workable range 230°-260°. Wrong swell direction for this spot.
    swell size:
      score: 13
      out of: 25
      explanation: Marginal size: 3.5m is 0.8m from ideal 4.3m.
    swell period:
      score: 25
      out of: 25
      explanation: Perfect period: 16s is at or above ideal 16s. Long-period groundswell with maximum power.
    wind:
      score: 1
      out of: 25
      explanation: Onshore/cross-shore: 15 km/h from 145° (SE). Destroying wave quality. Offshore range: 60°-120°.
  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 Icelands. Either swell direction (181°), size (3.5m), or wind (15 km/h from 145°) is unfavorable. Consider other spots or wait for better conditions.
conditions:
  swell:
    height m: 3.5
    height ft: 11.5
    direction degrees: 181
    direction cardinal: S
    period s: 16
    explanation: 3.5m (11.5ft) swell from 181° (S) at 16s period
  wind:
    speed kmh: 15
    speed mph: 9.3
    direction degrees: 145
    direction cardinal: SE
    explanation: 15 km/h (9 mph) from 145° (SE)
  windswell:
    height m: 0.5
    period s: 3
    explanation: Local wind-generated waves (choppy, short-period)

date: 2026-08-13
day index: 8
strike score:
  final score: 33
  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 178° is outside workable range 230°-260°. Wrong swell direction for this spot.
    swell size:
      score: 9
      out of: 25
      explanation: Marginal size: 2.7m is 1.5m from ideal 4.3m.
    swell period:
      score: 23
      out of: 25
      explanation: Good period: 15s is 94% of ideal 16s. Clean, powerful groundswell.
    wind:
      score: 12
      out of: 25
      explanation: Onshore/cross-shore: 11 km/h from 133° (SE). Destroying wave quality. Offshore range: 60°-120°.
  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 Icelands. Either swell direction (178°), size (2.7m), or wind (11 km/h from 133°) is unfavorable. Consider other spots or wait for better conditions.
conditions:
  swell:
    height m: 2.7
    height ft: 8.9
    direction degrees: 178
    direction cardinal: S
    period s: 15
    explanation: 2.7m (8.9ft) swell from 178° (S) at 15s period
  wind:
    speed kmh: 11
    speed mph: 6.8
    direction degrees: 133
    direction cardinal: SE
    explanation: 11 km/h (7 mph) from 133° (SE)
  secondary swell:
    height m: 1.2
    direction degrees: 181
    direction cardinal: S
    period s: 15
  windswell:
    height m: 0.4
    period s: 2
    explanation: Local wind-generated waves (choppy, short-period)

date: 2026-08-14
day index: 9
strike score:
  final score: 31
  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 183° is outside workable range 230°-260°. Wrong swell direction for this spot.
    swell size:
      score: 8
      out of: 25
      explanation: Marginal size: 2.4m is 1.9m from ideal 4.3m.
    swell period:
      score: 23
      out of: 25
      explanation: Good period: 15s is 94% of ideal 16s. Clean, powerful groundswell.
    wind:
      score: 9
      out of: 25
      explanation: Onshore/cross-shore: 12 km/h from 157° (SSE). Destroying wave quality. Offshore range: 60°-120°.
  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 Icelands. Either swell direction (183°), size (2.4m), or wind (12 km/h from 157°) is unfavorable. Consider other spots or wait for better conditions.
conditions:
  swell:
    height m: 2.4
    height ft: 7.9
    direction degrees: 183
    direction cardinal: S
    period s: 15
    explanation: 2.4m (7.9ft) swell from 183° (S) at 15s period
  wind:
    speed kmh: 12
    speed mph: 7.5
    direction degrees: 157
    direction cardinal: SSE
    explanation: 12 km/h (7 mph) from 157° (SSE)
  secondary swell:
    height m: 1.1
    direction degrees: 171
    direction cardinal: S
    period s: 16
  windswell:
    height m: 0.3
    period s: 2
    explanation: Local wind-generated waves (choppy, short-period)

Strike Mission
type: Organization