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Conditions at Caloundra in September
September: Spring Swing to Shorter Periods
September is still a high-quality month, with ideal wind 28% and a very strong NNW flow (17.6%) providing plenty of offshore sessions for the southeast-facing beaches. However, the swell signature begins to change. The average period drops to 7.5s and the average height to 3-4ft (0.9-1.2m), with more N, NNE and NE energy entering the mix (together about 24%) alongside E (18.8%), ESE (15.0%) and SE (14.0%). This is often younger, bouncier windswell mixed with early spring groundswell, so expect clean but sometimes softer, less powerful surf. Air temperatures are rising to 19.3°C, water is still cool at 20.9°C, and rainfall is at the annual low of 1.54mm/day.
Average Spot conditions at Caloundra in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Caloundra during September. 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 Caloundra for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Caloundra for September. 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 Caloundra.