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Conditions at Gas Bay in August
August: Longest-Period Groundswell
August remains deep winter, and the average swell height is still a meaty 2.7m (8.9ft). The average period peaks at 13.3s - the longest of the year - giving the waves serious speed and down-the-line power. Swell direction is extremely favorable on the whole: SW (25.6%) and WSW (14.0%) are the two biggest contributors, with W at 4.1% and SSW at 3.4%. The 1.5-2.5m (5-8ft) classes are packed, and there are repeated XXL-type energy pulses above 2.5m (8ft+). But like July, the wind is challenging. WSW (11.4%), W (11.2%), WNW (11.7%) and SW (10.0%) are all prominent, and ideal offshore NE flow drops to 18% of the time. The standout August days happen when a deep Southern Ocean low sends long-period SW/WSW swell while a high pressure ridge builds to the east, producing NE offshore wind at dawn. Those days are world-class. Water temp falls to 17.6°C, air temps stay around 14.3°C, and rain remains frequent with 3.12mm/day.
Average Spot conditions at Gas Bay in August
Swell history for August
Wind history for August
Swell quality
Analyze the groundswell consistency at Gas Bay during August. Based on historical data, there is a % probability of groundswell occurring this month. The chart below provides a detailed breakdown of the average wave height distribution, offering deep insights into the swell quality and surf potential you can expect at Gas Bay for your next trip in August.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Gas Bay for August. Our analysis shows that favorable offshore or side-shore winds coincide with surfable swell approximately % of the time. The accompanying graph illustrates the average size distribution of waves during these optimal wind windows at Gas Bay.