Conditions at Castaways in July
July: Big S Groundswell, Onshore Bias
July is one of the most challenging months for clean surf at Castaways. Average height remains at 1.7m (5.5ft), but the swell is now remarkably directional: SSE and S combine for 84% of the energy, with a huge 35-36% of waves in the 1.5-2m (5-6.5ft) bracketing. These are powerful, long-period waves that would be world-class if the wind were right. However, ideal wind is only 20%, and onshore and cross-onshore winds (SE, S, SW, W) dominate the day. The monsoon flow is simply too persistent to allow many clean sessions. Water temperature is a steady 29.4°C, and the regular 5.5 mm/day of rain keeps the tropics lush.
Average Spot conditions at Castaways in July
Swell history for July
Wind history for July
Swell quality
Analyze the groundswell consistency at Castaways during July. 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 July.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Castaways for July. 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.