Conditions at Five Islands in September
September: Late South Swell and Transitional Hints
September begins the long, slow transition out of the southwest monsoon. Swell size eases slightly to 5ft (1.6m) but remains powerful with a 10.5s period, and SSE (61%) plus S (23%) still dominate the rose. The height distribution leans heavily on 1.5-2m surf, with about 7% running 2-2.5m, so the reef can still see serious, grinding sets. Ideal offshore wind improves to 40%, and the wind field becomes more westerly-WSW 19.4%, W 16.7%, WNW 9.7% and SW 13.7%-so clean windows are more frequent than in July or August. Precipitation peaks at 6.03mm/day, but the surf is often worth the rain. Water temperature is 29.3°C, air 27.5°C. As the monsoon weakens, the trend is upward.
Average Spot conditions at Five Islands in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Five Islands 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 Five Islands for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Five Islands 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 Five Islands.