Conditions at Thunders in April
April: Cleaner Trade Winds and Pulsing SSW Groundswell
April is when Thunders really starts to wake up. The average period jumps to 13.5s, signalling more mature, organized Southern Ocean groundswell, while the average height remains 1.3m (4.3ft). SSW is king at 64.1%, and the S component pushes to 15.7%, meaning almost every wave approaching the break is coming from the favorable southern half of the window. Notable is the increase in size: 22.3% of observations are now 1.5-2m (5-6.5ft), with some 2-2.5m (6.5-8ft) sets appearing.
Wind consistency improves markedly. The ideal surfing wind share rises to 39%, and while NW/NNW flow is still present at 40.4% combined, the SE/SSE trades are becoming established. Those trades deliver cleaner, more lined-up conditions at Thunders than the winter monsoon. Rainfall is 7.43mm/day and the sea remains a warm 29.8°C. In April, each passing week brings more dry-season character to the air and more groomed SSW lines to the break.
Average Spot conditions at Thunders in April
Swell history for April
Wind history for April
Swell quality
Analyze the groundswell consistency at Thunders during April. 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 Thunders for your next trip in April.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Thunders for April. 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 Thunders.