10-day surf forecast with Strike Scores for Martha Lavinia, King Island, Australia
Martha Lavinia is the remote beach break on King Island that Tracks magazine rated as Australia's best. Sitting in Bass Strait between Tasmania and Victoria, the west-facing beach catches every Southern Ocean swell that rolls through, delivering powerful, hollow beach break peaks with nobody around. The island's small population means you'll likely surf alone, accompanied only by the kelp forests, Cape Barren geese, and the occasional seal. Getting here requires a flight to the tiny King Island Airport, but the reward is pristine, uncrowded waves in one of Australia's wildest settings.
Best day in the forecast: 2026-08-14 with a score of 59/100 (Fair)
Poor conditions overall: Average score 18/100. Look for spots with better forecasts.
Poor alignment: Swell from 181° is 44° off optimal 225°, barely within workable range 200°-260°.
Too small: 0.6m is below minimum 1.0m. Waves will be weak/mushy.
Moderate period: 10s meets minimum 10s but below ideal 14s. Some groundswell energy present.
Onshore/cross-shore: 9 km/h from 208° (SSW). Destroying wave quality. Offshore range: 210°-280°.
Groundswell-dominant conditions (clean, long-period waves).
Poor conditions at Martha Lavinia. Either swell direction (181°), size (0.6m), or wind (9 km/h from 208°) is unfavorable. Consider other spots or wait for better conditions.
0.6m (2.0ft) swell from 181° (S) at 10s period
Local wind-generated waves (choppy, short-period)
Perfect alignment: Swell from 225° is within 5° of optimal 225°.
Too small: 0.5m is below minimum 1.0m. Waves will be weak/mushy.
Onshore/cross-shore: 17 km/h from 293° (WNW). Destroying wave quality. Offshore range: 210°-280°.
-7 points: Short-period windswell is present, creating choppy, disorganized conditions.
Poor conditions at Martha Lavinia. Either swell direction (225°), size (0.5m), or wind (17 km/h from 293°) is unfavorable. Consider other spots or wait for better conditions.
0.5m (1.6ft) swell from 225° (SW) at 10s period
Poor alignment: Swell from 188° is 37° off optimal 225°, barely within workable range 200°-260°.
Too small: 0.7m is below minimum 1.0m. Waves will be weak/mushy.
Short period: 8s is below minimum 10s. Windswell-dominated (choppy, weak waves).
Onshore/cross-shore: 7 km/h from 314° (NW). Destroying wave quality. Offshore range: 210°-280°.
Poor conditions at Martha Lavinia. Either swell direction (188°), size (0.7m), or wind (7 km/h from 314°) is unfavorable. Consider other spots or wait for better conditions.
0.7m (2.3ft) swell from 188° (S) at 8s period
Moderate alignment: Swell from 217° is 8° off optimal 225°, workable but not ideal.
Perfect period: 16s is at or above ideal 14s. Long-period groundswell with maximum power.
Onshore/cross-shore: 26 km/h from 6° (N). Destroying wave quality. Offshore range: 210°-280°.
-10 points: Short-period windswell is present, creating choppy, disorganized conditions.
Poor conditions at Martha Lavinia. Either swell direction (217°), size (0.6m), or wind (26 km/h from 6°) is unfavorable. Consider other spots or wait for better conditions.
0.6m (2.0ft) swell from 217° (SW) at 16s period
No alignment: Swell from 60° is outside workable range 200°-260°. Wrong swell direction for this spot.
Too small: 0.4m is below minimum 1.0m. Waves will be weak/mushy.
Perfect period: 15s is at or above ideal 14s. Long-period groundswell with maximum power.
Onshore/cross-shore: 27 km/h from 4° (N). Destroying wave quality. Offshore range: 210°-280°.
-10 points: Previous days of onshore wind left residual chop ("morning sickness"), reducing wave quality.
Poor conditions at Martha Lavinia. Either swell direction (60°), size (0.4m), or wind (27 km/h from 4°) is unfavorable. Consider other spots or wait for better conditions.
0.4m (1.3ft) swell from 60° (ENE) at 15s period
No alignment: Swell from 13° is outside workable range 200°-260°. Wrong swell direction for this spot.
Strong offshore: 26 km/h from 263° (W). Grooming but may make paddling difficult.
-17 points: Previous days of onshore wind left residual chop ("morning sickness"), reducing wave quality.
Poor conditions at Martha Lavinia. Either swell direction (13°), size (0.7m), or wind (26 km/h from 263°) is unfavorable. Consider other spots or wait for better conditions.
0.7m (2.3ft) swell from 13° (NNE) at 10s period
Moderate alignment: Swell from 254° is 29° off optimal 225°, workable but not ideal.
Moderate period: 12s meets minimum 10s but below ideal 14s. Some groundswell energy present.
Onshore/cross-shore: 34 km/h from 325° (NW). Destroying wave quality. Offshore range: 210°-280°.
-11 points: Previous days of onshore wind left residual chop ("morning sickness"), reducing wave quality.
Poor conditions at Martha Lavinia. Either swell direction (254°), size (0.5m), or wind (34 km/h from 325°) is unfavorable. Consider other spots or wait for better conditions.
0.5m (1.6ft) swell from 254° (WSW) at 12s period
Moderate alignment: Swell from 249° is 24° off optimal 225°, workable but not ideal.
Too small: 0.3m is below minimum 1.0m. Waves will be weak/mushy.
Good period: 13s is 93% of ideal 14s. Clean, powerful groundswell.
Strong offshore: 39 km/h from 278° (W). Grooming but may make paddling difficult.
-14 points: Previous days of onshore wind left residual chop ("morning sickness"), reducing wave quality.
Poor conditions at Martha Lavinia. Either swell direction (249°), size (0.3m), or wind (39 km/h from 278°) is unfavorable. Consider other spots or wait for better conditions.
0.3m (1.0ft) swell from 249° (WSW) at 13s period
Very low confidence (8-10 day forecast, conditions may change)
Moderate alignment: Swell from 201° is 24° off optimal 225°, workable but not ideal.
Marginal size: 2.1m is 0.1m from ideal 2.0m.
Good period: 18s is 129% of ideal 14s. Clean, powerful groundswell.
Strong offshore: 23 km/h from 274° (W). Grooming but may make paddling difficult.
-7 points: Previous days of onshore wind left residual chop ("morning sickness"), reducing wave quality.
Surfable but not special at Martha Lavinia. The 2.1m swell from 201° is workable, but conditions aren't ideal. Fine if you're local, but not worth a dedicated trip.
2.1m (6.9ft) swell from 201° (SSW) at 18s period
Good alignment: Swell from 222° is 3° off optimal 225°, still within prime range.
Marginal size: 1.4m is 0.6m from ideal 2.0m.
Strong offshore: 20 km/h from 264° (W). Grooming but may make paddling difficult.
Surfable but not special at Martha Lavinia. The 1.4m swell from 222° is workable, but conditions aren't ideal. Fine if you're local, but not worth a dedicated trip.
1.4m (4.6ft) swell from 222° (SW) at 15s period
Open-Meteo Weather API (wind/weather data)