Conditions at Castaways in May
May: Monsoon Wind vs. Building South Swell
May is when the southwest monsoon takes over, and onshore winds become the dominant force. Ideal wind frequency plummets to 13%, with WSW and W winds blowing 46% of the time. Despite this, the swell is on the rise, averaging 1.5m (5ft) with a 11.4s period. The direction is almost purely south-based - S (39.4%) and SSW (21.4%) - exactly what Castaways would love, if only the wind would cooperate. Most of the time the sea surface is bumpy and lumpy, though there can be short-lived clean windows when a high-pressure ridge briefly aligns with the islands. It's a frustrating month for surfers but one that hints at the powerful swells to come.
Average Spot conditions at Castaways in May
Swell history for May
Wind history for May
Swell quality
Analyze the groundswell consistency at Castaways during May. 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 Castaways for your next trip in May.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Castaways for May. 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 Castaways.