10-day surf forecast with Strike Scores for Gills Bay Slab, Caithness, UK
Gills Bay Slab is one of Europe's heaviest waves--a monstrous left-hand slab that only comes alive during the most violent winter storms.
Best day in the forecast: 2026-08-05 with a score of 0/100 (Poor)
Poor conditions overall: Average score 0/100. Look for spots with better forecasts.
No alignment: Swell from 82° is outside workable range 340°-60°. Wrong swell direction for this spot.
Too small: 1.2m is below minimum 2.5m. Waves will be weak/mushy.
Short period: 7s is below minimum 12s. Windswell-dominated (choppy, weak waves).
Onshore/cross-shore: 11 km/h from 43° (NE). Destroying wave quality. Offshore range: 190°-260°.
-10 points: Previous days of onshore wind left residual chop ("morning sickness"), reducing wave quality.
Groundswell-dominant conditions (clean, long-period waves).
Poor conditions at Gills Bay Slab. Either swell direction (82°), size (1.2m), or wind (11 km/h from 43°) is unfavorable. Consider other spots or wait for better conditions.
1.2m (3.9ft) swell from 82° (E) at 6.5s period
Local wind-generated waves (choppy, short-period)
Moderate alignment: Swell from 40° is 25° off optimal 15°, workable but not ideal.
Too small: 0.9m is below minimum 2.5m. Waves will be weak/mushy.
Short period: 8s is below minimum 12s. Windswell-dominated (choppy, weak waves).
Onshore/cross-shore: 21 km/h from 321° (NW). Destroying wave quality. Offshore range: 190°-260°.
-7 points: Previous days of onshore wind left residual chop ("morning sickness"), reducing wave quality.
Poor conditions at Gills Bay Slab. Either swell direction (40°), size (0.9m), or wind (21 km/h from 321°) is unfavorable. Consider other spots or wait for better conditions.
0.9m (3.0ft) swell from 40° (NE) at 8.1s period
Poor alignment: Swell from 60° is 45° off optimal 15°, barely within workable range 340°-60°.
Too small: 0.4m is below minimum 2.5m. Waves will be weak/mushy.
Onshore/cross-shore: 27 km/h from 189° (S). Destroying wave quality. Offshore range: 190°-260°.
-14 points: Previous days of onshore wind left residual chop ("morning sickness"), reducing wave quality.
-7 points: Short-period windswell is present, creating choppy, disorganized conditions.
Poor conditions at Gills Bay Slab. Either swell direction (60°), size (0.4m), or wind (27 km/h from 189°) is unfavorable. Consider other spots or wait for better conditions.
0.4m (1.3ft) swell from 60° (ENE) at 8.2s period
No alignment: Swell from 233° is outside workable range 340°-60°. Wrong swell direction for this spot.
Too small: 0.7m is below minimum 2.5m. Waves will be weak/mushy.
Strong offshore: 22 km/h from 190° (S). Grooming but may make paddling difficult.
-17 points: Previous days of onshore wind left residual chop ("morning sickness"), reducing wave quality.
-5 points: Short-period windswell is present, creating choppy, disorganized conditions.
Poor conditions at Gills Bay Slab. Either swell direction (233°), size (0.7m), or wind (22 km/h from 190°) is unfavorable. Consider other spots or wait for better conditions.
0.7m (2.3ft) swell from 233° (SW) at 8s period
No alignment: Swell from 131° is outside workable range 340°-60°. Wrong swell direction for this spot.
Too small: 1.0m is below minimum 2.5m. Waves will be weak/mushy.
Short period: 6s is below minimum 12s. Windswell-dominated (choppy, weak waves).
Onshore/cross-shore: 39 km/h from 273° (W). Destroying wave quality. Offshore range: 190°-260°.
-11 points: Previous days of onshore wind left residual chop ("morning sickness"), reducing wave quality.
Poor conditions at Gills Bay Slab. Either swell direction (131°), size (1.0m), or wind (39 km/h from 273°) is unfavorable. Consider other spots or wait for better conditions.
1.0m (3.3ft) swell from 131° (SE) at 6s period
No alignment: Swell from 81° is outside workable range 340°-60°. Wrong swell direction for this spot.
Onshore/cross-shore: 14 km/h from 337° (NNW). Destroying wave quality. Offshore range: 190°-260°.
Poor conditions at Gills Bay Slab. Either swell direction (81°), size (0.4m), or wind (14 km/h from 337°) is unfavorable. Consider other spots or wait for better conditions.
0.4m (1.3ft) swell from 81° (E) at 8s period
No alignment: Swell from 296° is outside workable range 340°-60°. Wrong swell direction for this spot.
Too small: 0.3m is below minimum 2.5m. Waves will be weak/mushy.
Onshore/cross-shore: 21 km/h from 142° (SE). Destroying wave quality. Offshore range: 190°-260°.
Poor conditions at Gills Bay Slab. Either swell direction (296°), size (0.3m), or wind (21 km/h from 142°) is unfavorable. Consider other spots or wait for better conditions.
0.3m (1.0ft) swell from 296° (WNW) at 8s period
No alignment: Swell from 128° is outside workable range 340°-60°. Wrong swell direction for this spot.
Onshore/cross-shore: 16 km/h from 153° (SSE). Destroying wave quality. Offshore range: 190°-260°.
Poor conditions at Gills Bay Slab. Either swell direction (128°), size (1.0m), or wind (16 km/h from 153°) is unfavorable. Consider other spots or wait for better conditions.
1.0m (3.3ft) swell from 128° (SE) at 7s period
Very low confidence (8-10 day forecast, conditions may change)
No alignment: Swell from 141° is outside workable range 340°-60°. Wrong swell direction for this spot.
Onshore/cross-shore: 35 km/h from 278° (W). Destroying wave quality. Offshore range: 190°-260°.
-10 points: Short-period windswell is present, creating choppy, disorganized conditions.
Poor conditions at Gills Bay Slab. Either swell direction (141°), size (0.4m), or wind (35 km/h from 278°) is unfavorable. Consider other spots or wait for better conditions.
0.4m (1.3ft) swell from 141° (SE) at 7s period
No alignment: Swell from 134° is outside workable range 340°-60°. Wrong swell direction for this spot.
Light offshore: 8 km/h from 218° (SW). Grooming the wave face beautifully.
Poor conditions at Gills Bay Slab. Either swell direction (134°), size (0.4m), or wind (8 km/h from 218°) is unfavorable. Consider other spots or wait for better conditions.
0.4m (1.3ft) swell from 134° (SE) at 6s period
Open-Meteo Weather API (wind/weather data)