10-day surf forecast with Strike Scores for Porth Neigwl, Lleyn Peninsula, North Wales, UK
Porth Neigwl--or Hell's Mouth--is a sweeping 3-mile beach on the Lleyn Peninsula that catches SW-S swells.
Best day in the forecast: 2026-08-04 with a score of 0/100 (Poor)
Poor conditions overall: Average score 0/100. Look for spots with better forecasts.
Moderate alignment: Swell from 226° is 16° off optimal 210°, workable but not ideal.
Too small: 0.6m is below minimum 1.0m. Waves will be weak/mushy.
Short period: 6s is below minimum 8s. Windswell-dominated (choppy, weak waves).
Onshore/cross-shore: 22 km/h from 202° (SSW). Destroying wave quality. Offshore range: 350°-60°.
-7 points: Short-period windswell is present, creating choppy, disorganized conditions.
Poor conditions at Porth Neigwl. Either swell direction (226°), size (0.6m), or wind (22 km/h from 202°) is unfavorable. Consider other spots or wait for better conditions.
0.6m (2.0ft) swell from 226° (SW) at 6s period
Local wind-generated waves (choppy, short-period)
Good alignment: Swell from 216° is 6° off optimal 210°, still within prime range.
Too small: 0.7m is below minimum 1.0m. Waves will be weak/mushy.
Onshore/cross-shore: 31 km/h from 262° (W). Destroying wave quality. Offshore range: 350°-60°.
-10 points: Previous days of onshore wind left residual chop ("morning sickness"), reducing wave quality.
Poor conditions at Porth Neigwl. Either swell direction (216°), size (0.7m), or wind (31 km/h from 262°) is unfavorable. Consider other spots or wait for better conditions.
0.7m (2.3ft) swell from 216° (SW) at 5.8s period
Poor alignment: Swell from 248° is 38° off optimal 210°, barely within workable range 190°-250°.
Short period: 5s is below minimum 8s. Windswell-dominated (choppy, weak waves).
Onshore/cross-shore: 20 km/h from 283° (WNW). Destroying wave quality. Offshore range: 350°-60°.
-17 points: Previous days of onshore wind left residual chop ("morning sickness"), reducing wave quality.
Groundswell-dominant conditions (clean, long-period waves).
Poor conditions at Porth Neigwl. Either swell direction (248°), size (0.6m), or wind (20 km/h from 283°) is unfavorable. Consider other spots or wait for better conditions.
0.6m (2.0ft) swell from 248° (WSW) at 5.3s period
Moderate alignment: Swell from 237° is 27° off optimal 210°, workable but not ideal.
Too small: 0.3m is below minimum 1.0m. Waves will be weak/mushy.
Short period: 4s is below minimum 8s. Windswell-dominated (choppy, weak waves).
Onshore/cross-shore: 10 km/h from 248° (WSW). Destroying wave quality. Offshore range: 350°-60°.
-11 points: Previous days of onshore wind left residual chop ("morning sickness"), reducing wave quality.
Poor conditions at Porth Neigwl. Either swell direction (237°), size (0.3m), or wind (10 km/h from 248°) is unfavorable. Consider other spots or wait for better conditions.
0.3m (1.0ft) swell from 237° (WSW) at 3.6s period
Moderate alignment: Swell from 238° is 28° off optimal 210°, workable but not ideal.
Too small: 0.2m is below minimum 1.0m. Waves will be weak/mushy.
Short period: 7s is below minimum 8s. Windswell-dominated (choppy, weak waves).
Onshore/cross-shore: 25 km/h from 206° (SSW). Destroying wave quality. Offshore range: 350°-60°.
Poor conditions at Porth Neigwl. Either swell direction (238°), size (0.2m), or wind (25 km/h from 206°) is unfavorable. Consider other spots or wait for better conditions.
0.2m (0.7ft) swell from 238° (WSW) at 7s period
Moderate alignment: Swell from 225° is 15° off optimal 210°, workable but not ideal.
Onshore/cross-shore: 26 km/h from 252° (WSW). Destroying wave quality. Offshore range: 350°-60°.
-5 points: Short-period windswell is present, creating choppy, disorganized conditions.
Poor conditions at Porth Neigwl. Either swell direction (225°), size (0.6m), or wind (26 km/h from 252°) is unfavorable. Consider other spots or wait for better conditions.
0.6m (2.0ft) swell from 225° (SW) at 7s period
Moderate alignment: Swell from 228° is 18° off optimal 210°, workable but not ideal.
Onshore/cross-shore: 19 km/h from 299° (WNW). Destroying wave quality. Offshore range: 350°-60°.
Poor conditions at Porth Neigwl. Either swell direction (228°), size (0.6m), or wind (19 km/h from 299°) is unfavorable. Consider other spots or wait for better conditions.
0.6m (2.0ft) swell from 228° (SW) at 5s period
Moderate alignment: Swell from 231° is 21° off optimal 210°, workable but not ideal.
Too small: 0.4m is below minimum 1.0m. Waves will be weak/mushy.
Onshore/cross-shore: 13 km/h from 178° (S). Destroying wave quality. Offshore range: 350°-60°.
Poor conditions at Porth Neigwl. Either swell direction (231°), size (0.4m), or wind (13 km/h from 178°) is unfavorable. Consider other spots or wait for better conditions.
0.4m (1.3ft) swell from 231° (SW) at 7s period
Very low confidence (8-10 day forecast, conditions may change)
Poor alignment: Swell from 240° is 30° off optimal 210°, barely within workable range 190°-250°.
Too small: 0.5m is below minimum 1.0m. Waves will be weak/mushy.
Onshore/cross-shore: 27 km/h from 195° (SSW). Destroying wave quality. Offshore range: 350°-60°.
-10 points: Short-period windswell is present, creating choppy, disorganized conditions.
Poor conditions at Porth Neigwl. Either swell direction (240°), size (0.5m), or wind (27 km/h from 195°) is unfavorable. Consider other spots or wait for better conditions.
0.5m (1.6ft) swell from 240° (WSW) at 6s period
Too small: 0.8m is below minimum 1.0m. Waves will be weak/mushy.
Moderate period: 9s meets minimum 8s but below ideal 12s. Some groundswell energy present.
Onshore/cross-shore: 26 km/h from 235° (SW). Destroying wave quality. Offshore range: 350°-60°.
Poor conditions at Porth Neigwl. Either swell direction (231°), size (0.8m), or wind (26 km/h from 235°) is unfavorable. Consider other spots or wait for better conditions.
0.8m (2.6ft) swell from 231° (SW) at 9s period
Open-Meteo Weather API (wind/weather data)