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Conditions at Millers in May
May: Bigger Groundswell, Fickle Winds
May is where the winter swell engine starts to roar. Average height jumps to 7.2ft (2.2m) and period to 12.2s - powerful, long-period groundswell. The SSW sector leads at 27.9 per cent, but SW is nearly as strong at 21.3 per cent, and together with S (12.0 per cent) they dominate the spectrum. The over-8ft (2.5m) class begins to show up, meaning occasional XXL days are on the calendar. Yet the quality trade-off becomes apparent: ideal offshore wind drops to 22 per cent. The wind rose is more westerly, with WSW at 17.9 per cent and W at 14.9 per cent, while the onshore NNW flow builds to 8.6 per cent. Air temp averages 18.2°C, water 18.4°C and rain is low at 0.79 mm/day. If a S/SW wind lines up with a long-period S/SW swell, May serves up some of the biggest, cleanest waves of the year - but patience is required.
Average Spot conditions at Millers in May
Swell history for May
Wind history for May
Swell quality
Analyze the groundswell consistency at Millers during May. 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 Millers for your next trip in May.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Millers for May. 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 Millers.