Conditions at Castaways in December
December: The Season Comes Alive
December marks the true start of the prime surf season at Castaways. The northeast monsoon is now re-established, delivering offshore winds from N, NNE, NW, and NNW 58% of the time. The swell still carries that transitional west influence, but S, SSE, and SSW directions remain well represented, keeping the beach full of energy. Average height is a manageable 1.2m (4ft) with a 10.2s period - ideal for high-performance surfing. The dry season brings lower precipitation and 28.8°C water temps. As the Indian Ocean high pressure systems align with the islands, you can expect clean, lined-up waves and a seabreeze-free day more often than not. It's the window to book.
Average Spot conditions at Castaways in December
Swell history for December
Wind history for December
Swell quality
Analyze the groundswell consistency at Castaways during December. 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 December.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Castaways for December. 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.