Conditions at Crab Island in August
August: Waiting for Autumn's First Pulse
August remains in the summer lull, though the signs of change are starting to appear. Average swell height bumps up slightly to 3-4ft (0.9-1.2m) and the average period ticks to 8.9 seconds. The west-facing swell pattern is as favorable as ever, W produces 43.5% of all swell, WSW 18.7%, WNW 20.5%, and NW 4.3%, but the vast majority of waves are still in the 0.5-1.5m (2-5ft) range.
The wind regime is still summer-like, with ideal wind at only 13% and the WSW-to-NW onshore sector making up 45.7% of observations. Offshore ENE-to-SE flow is a meagre 11.8%. Water temperature peaks at 16.7°C, average air temperature is 15.3°C, and precipitation is 3.52mm/day. Late August can see the first low pressure systems of autumn dip south, so keep an eye on the longer-range charts, but for now, expect small, sea-breeze-affected waves with the occasional clean pulse at dawn.
Average Spot conditions at Crab Island in August
Swell history for August
Wind history for August
Swell quality
Analyze the groundswell consistency at Crab Island 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 Crab Island for your next trip in August.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Crab Island 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 Crab Island.