Surf Forecast for Rhossili Bay
type: Dataset
description: 10-day surf forecast with Strike Scores for Rhossili Bay, Gower, UK
about: Rhossili Bay
  type: TouristAttraction
  geo: GeoCoordinates
    latitude: 51.5622
    longitude: -4.2889
  description: Rhossili Bay is frequently voted one of the UK's most beautiful beaches--sweeping sand backed by dramatic cliffs.
summary:
  best day:
    date: 2026-08-12
    score: 37
    category: Poor
    explanation: Best day in the forecast: 2026-08-12 with a score of 37/100 (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: 5
    category: Poor
    category emoji: 💤
    confidence: 1
    confidence explanation: Very high confidence (0-1 day forecast)
    breakdown:
      swell direction:
        score: 24
        out of: 25
        explanation: Perfect alignment: Swell from 238° is within 5° of optimal 240°.
      swell size:
        score: 10
        out of: 25
        explanation: Marginal size: 1.1m is 0.6m from ideal 1.7m.
      swell period:
        score: 4
        out of: 25
        explanation: Short period: 7s is below minimum 8s. Windswell-dominated (choppy, weak waves).
      wind:
        score: 0
        out of: 25
        explanation: Onshore/cross-shore: 29 km/h from 278° (W). Destroying wave quality. Offshore range: 30°-120°.
    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: -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 Rhossili Bay. Either swell direction (238°), size (1.1m), or wind (29 km/h from 278°) is unfavorable. Consider other spots or wait for better conditions.
  conditions:
    swell:
      height m: 1.1
      height ft: 3.6
      direction degrees: 238
      direction cardinal: WSW
      period s: 7
      peak period s: 7.1
      explanation: 1.1m (3.6ft) swell from 238° (WSW) at 7.1s period
    wind:
      speed kmh: 29
      speed mph: 18.0
      direction degrees: 278
      direction cardinal: W
      explanation: 29 km/h (18 mph) from 278° (W)
    windswell:
      height m: 1.1
      period s: 4
      explanation: Local wind-generated waves (choppy, short-period)
forecasts:
  date: 2026-08-06
  day index: 1
  strike score:
    final score: 0
    category: Poor
    category emoji: 💤
    confidence: 1
    confidence explanation: Very high confidence (0-1 day forecast)
    breakdown:
      swell direction:
        score: 16
        out of: 25
        explanation: Moderate alignment: Swell from 254° is 14° off optimal 240°, workable but not ideal.
      swell size:
        score: 8
        out of: 25
        explanation: Marginal size: 0.9m is 0.8m from ideal 1.7m.
      swell period:
        score: 2
        out of: 25
        explanation: Short period: 6s is below minimum 8s. Windswell-dominated (choppy, weak waves).
      wind:
        score: 0
        out of: 25
        explanation: Onshore/cross-shore: 21 km/h from 282° (WNW). Destroying wave quality. Offshore range: 30°-120°.
    adjustments:
      wind history:
        adjustment: -17
        groomed: false
        morning sickness: true
        explanation: -17 points: Previous days of onshore wind left residual chop ("morning sickness"), reducing wave quality.
      windswell penalty:
        adjustment: -3
        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 Rhossili Bay. Either swell direction (254°), size (0.9m), or wind (21 km/h from 282°) is unfavorable. Consider other spots or wait for better conditions.
  conditions:
    swell:
      height m: 0.9
      height ft: 3.0
      direction degrees: 254
      direction cardinal: WSW
      period s: 6
      peak period s: 6
      explanation: 0.9m (3.0ft) swell from 254° (WSW) at 6s period
    wind:
      speed kmh: 21
      speed mph: 13.0
      direction degrees: 282
      direction cardinal: WNW
      explanation: 21 km/h (13 mph) from 282° (WNW)
    windswell:
      height m: 0.4
      period s: 3
      explanation: Local wind-generated waves (choppy, short-period)
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: 16
        out of: 25
        explanation: Moderate alignment: Swell from 254° is 14° off optimal 240°, workable but not ideal.
      swell size:
        score: 1
        out of: 25
        explanation: Too small: 0.4m is below minimum 0.9m. Waves will be weak/mushy.
      swell period:
        score: 9
        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 206° (SSW). Destroying wave quality. Offshore range: 30°-120°.
    adjustments:
      wind history:
        adjustment: -21
        groomed: false
        morning sickness: true
        explanation: -21 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 Rhossili Bay. Either swell direction (254°), size (0.4m), or wind (11 km/h from 206°) is unfavorable. Consider other spots or wait for better conditions.
  conditions:
    swell:
      height m: 0.4
      height ft: 1.3
      direction degrees: 254
      direction cardinal: WSW
      period s: 9
      peak period s: 9.3
      explanation: 0.4m (1.3ft) swell from 254° (WSW) at 9.3s period
    wind:
      speed kmh: 11
      speed mph: 6.8
      direction degrees: 206
      direction cardinal: SSW
      explanation: 11 km/h (7 mph) from 206° (SSW)
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: 23
        out of: 25
        explanation: Good alignment: Swell from 243° is 3° off optimal 240°, still within prime range.
    summary: Poor conditions at Rhossili Bay. Either swell direction (243°), size (0.3m), or wind (10 km/h from 195°) is unfavorable. Consider other spots or wait for better conditions.
provider: Strike Mission
date published: 2026-08-05T04:15:20.795Z
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: 1
out of: 25
explanation: Too small: 0.3m is below minimum 0.9m. Waves will be weak/mushy.

score: 0
out of: 25
explanation: Short period: 1s is below minimum 8s. Windswell-dominated (choppy, weak waves).

score: 10
out of: 25
explanation: Onshore/cross-shore: 10 km/h from 195° (SSW). Destroying wave quality. Offshore range: 30°-120°.

wind history:
  adjustment: -11
  groomed: false
  morning sickness: true
  explanation: -11 points: Previous days of onshore wind left residual chop ("morning sickness"), reducing wave quality.
windswell penalty:
  adjustment: -3
  windswell degraded: false
  explanation: Groundswell-dominant conditions (clean, long-period waves).
secondary swell bonus:
  adjustment: 0
  explanation: No secondary swell bonus.

swell:
  height m: 0.3
  height ft: 1.0
  direction degrees: 243
  direction cardinal: WSW
  period s: 3
  peak period s: 0.6
  explanation: 0.3m (1.0ft) swell from 243° (WSW) at 0.6s period
wind:
  speed kmh: 10
  speed mph: 6.2
  direction degrees: 195
  direction cardinal: SSW
  explanation: 10 km/h (6 mph) from 195° (SSW)

date: 2026-08-09
day index: 4
strike score:
  final score: 1
  category: Poor
  category emoji: 💤
  confidence: 0.89
  confidence explanation: Moderate confidence (4-5 day forecast)
  breakdown:
    swell direction:
      score: 23
      out of: 25
      explanation: Good alignment: Swell from 237° is 3° off optimal 240°, still within prime range.
    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: 4
      out of: 25
      explanation: Short period: 7s is below minimum 8s. Windswell-dominated (choppy, weak waves).
    wind:
      score: 0
      out of: 25
      explanation: Onshore/cross-shore: 17 km/h from 284° (WNW). Destroying wave quality. Offshore range: 30°-120°.
  adjustments:
    wind history:
      adjustment: -4
      groomed: false
      morning sickness: false
      explanation: No significant wind history adjustment.
    windswell penalty:
      adjustment: -7
      windswell degraded: true
      explanation: -7 points: Short-period windswell is present, creating choppy, disorganized conditions.
    secondary swell bonus:
      adjustment: 0
      explanation: No secondary swell bonus.
  summary: Poor conditions at Rhossili Bay. Either swell direction (237°), size (0.7m), or wind (17 km/h from 284°) is unfavorable. Consider other spots or wait for better conditions.
conditions:
  swell:
    height m: 0.7
    height ft: 2.3
    direction degrees: 237
    direction cardinal: WSW
    period s: 7
    explanation: 0.7m (2.3ft) swell from 237° (WSW) at 7s period
  wind:
    speed kmh: 17
    speed mph: 10.6
    direction degrees: 284
    direction cardinal: WNW
    explanation: 17 km/h (11 mph) from 284° (WNW)
  windswell:
    height m: 0.9
    period s: 4
    explanation: Local wind-generated waves (choppy, short-period)

date: 2026-08-10
day index: 5
strike score:
  final score: 16
  category: Poor
  category emoji: 💤
  confidence: 0.86
  confidence explanation: Moderate confidence (4-5 day forecast)
  breakdown:
    swell direction:
      score: 16
      out of: 25
      explanation: Moderate alignment: Swell from 255° is 15° off optimal 240°, workable but not ideal.
    swell size:
      score: 11
      out of: 25
      explanation: Marginal size: 1.2m is 0.5m from ideal 1.7m.
    swell period:
      score: 4
      out of: 25
      explanation: Short period: 7s is below minimum 8s. Windswell-dominated (choppy, weak waves).
    wind:
      score: 0
      out of: 25
      explanation: Onshore/cross-shore: 15 km/h from 284° (WNW). Destroying wave quality. Offshore range: 30°-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 Rhossili Bay. Either swell direction (255°), size (1.2m), or wind (15 km/h from 284°) is unfavorable. Consider other spots or wait for better conditions.
conditions:
  swell:
    height m: 1.2
    height ft: 3.9
    direction degrees: 255
    direction cardinal: WSW
    period s: 7
    explanation: 1.2m (3.9ft) swell from 255° (WSW) at 7s period
  wind:
    speed kmh: 15
    speed mph: 9.3
    direction degrees: 284
    direction cardinal: WNW
    explanation: 15 km/h (9 mph) from 284° (WNW)

date: 2026-08-11
day index: 6
strike score:
  final score: 11
  category: Poor
  category emoji: 💤
  confidence: 0.83
  confidence explanation: Low confidence (6-7 day forecast)
  breakdown:
    swell direction:
      score: 18
      out of: 25
      explanation: Moderate alignment: Swell from 251° is 11° off optimal 240°, workable but not ideal.
    swell size:
      score: 2
      out of: 25
      explanation: Too small: 0.6m 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: 14 km/h from 129° (SE). Destroying wave quality. Offshore range: 30°-120°.
  adjustments:
    wind history:
      adjustment: 0
      groomed: false
      morning sickness: false
      explanation: No significant wind history adjustment.
    windswell penalty:
      adjustment: -3
      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 Rhossili Bay. Either swell direction (251°), size (0.6m), or wind (14 km/h from 129°) is unfavorable. Consider other spots or wait for better conditions.
conditions:
  swell:
    height m: 0.6
    height ft: 2.0
    direction degrees: 251
    direction cardinal: WSW
    period s: 7
    explanation: 0.6m (2.0ft) swell from 251° (WSW) at 7s period
  wind:
    speed kmh: 14
    speed mph: 8.7
    direction degrees: 129
    direction cardinal: SE
    explanation: 14 km/h (9 mph) from 129° (SE)
  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: 37
  category: Poor
  category emoji: 💤
  confidence: 0.8
  confidence explanation: Low confidence (6-7 day forecast)
  breakdown:
    swell direction:
      score: 15
      out of: 25
      explanation: Moderate alignment: Swell from 256° is 16° off optimal 240°, workable but not ideal.
    swell size:
      score: 16
      out of: 25
      explanation: Marginal size: 1.6m is 0.1m from ideal 1.7m.
    swell period:
      score: 23
      out of: 25
      explanation: Good period: 11s is 92% of ideal 12s. Clean, powerful groundswell.
    wind:
      score: 0
      out of: 25
      explanation: Onshore/cross-shore: 27 km/h from 228° (SW). Destroying wave quality. Offshore range: 30°-120°.
  adjustments:
    wind history:
      adjustment: 0
      groomed: false
      morning sickness: false
      explanation: No significant wind history adjustment.
    windswell penalty:
      adjustment: -3
      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 Rhossili Bay. Either swell direction (256°), size (1.6m), or wind (27 km/h from 228°) is unfavorable. Consider other spots or wait for better conditions.
conditions:
  swell:
    height m: 1.6
    height ft: 5.2
    direction degrees: 256
    direction cardinal: WSW
    period s: 11
    explanation: 1.6m (5.2ft) swell from 256° (WSW) at 11s period
  wind:
    speed kmh: 27
    speed mph: 16.8
    direction degrees: 228
    direction cardinal: SW
    explanation: 27 km/h (17 mph) from 228° (SW)
  windswell:
    height m: 1
    period s: 4
    explanation: Local wind-generated waves (choppy, short-period)

date: 2026-08-13
day index: 8
strike score:
  final score: 23
  category: Poor
  category emoji: 💤
  confidence: 0.8
  confidence explanation: Very low confidence (8-10 day forecast, conditions may change)
  breakdown:
    swell direction:
      score: 16
      out of: 25
      explanation: Moderate alignment: Swell from 254° is 14° off optimal 240°, workable but not ideal.
    swell size:
      score: 24
      out of: 25
      explanation: Perfect size: 2.0m is at the sweet spot (ideal: 1.7m).
    swell period:
      score: 8
      out of: 25
      explanation: Moderate period: 9s meets minimum 8s but below ideal 12s. Some groundswell energy present.
    wind:
      score: 0
      out of: 25
      explanation: Onshore/cross-shore: 15 km/h from 269° (W). Destroying wave quality. Offshore range: 30°-120°.
  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: Poor conditions at Rhossili Bay. Either swell direction (254°), size (2.0m), or wind (15 km/h from 269°) is unfavorable. Consider other spots or wait for better conditions.
conditions:
  swell:
    height m: 2
    height ft: 6.6
    direction degrees: 254
    direction cardinal: WSW
    period s: 9
    explanation: 2.0m (6.6ft) swell from 254° (WSW) at 9s period
  wind:
    speed kmh: 15
    speed mph: 9.3
    direction degrees: 269
    direction cardinal: W
    explanation: 15 km/h (9 mph) from 269° (W)
  windswell:
    height m: 0.3
    period s: 2
    explanation: Local wind-generated waves (choppy, short-period)

date: 2026-08-14
day index: 9
strike score:
  final score: 0
  category: Poor
  category emoji: 💤
  confidence: 0.8
  confidence explanation: Very low confidence (8-10 day forecast, conditions may change)
  breakdown:
    swell direction:
      score: 18
      out of: 25
      explanation: Moderate alignment: Swell from 251° is 11° off optimal 240°, 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: 0
      out of: 25
      explanation: Onshore/cross-shore: 27 km/h from 249° (WSW). Destroying wave quality. Offshore range: 30°-120°.
  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 Rhossili Bay. Either swell direction (251°), size (0.7m), or wind (27 km/h from 249°) is unfavorable. Consider other spots or wait for better conditions.
conditions:
  swell:
    height m: 0.7
    height ft: 2.3
    direction degrees: 251
    direction cardinal: WSW
    period s: 9
    explanation: 0.7m (2.3ft) swell from 251° (WSW) at 9s period
  wind:
    speed kmh: 27
    speed mph: 16.8
    direction degrees: 249
    direction cardinal: WSW
    explanation: 27 km/h (17 mph) from 249° (WSW)

Strike Mission
type: Organization