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Conditions at Johanna in July
July: Midwinter Power and Serious Commitment
Midwinter delivers maximum grunt. Average swell heights reach 2.8m (9-10ft) and the period climbs to 13.0s - true long-period, groundswell territory. The directional spread tilts WSW at 16.7%, SW at 15.8%, W at 6.9% and SSW at 3.9%; the heaviest swells are now arriving from a wider, westerly window. There is a substantial amount of energy over 2.5m (8ft), so expect ledgey, power-hungry waves at Johanna when the winds align.
Ideal wind drops to 30%, with N/NNE flow still a solid part of the picture and NNW/NW winds very prominent around the frequent mid-latitude lows. The S-SW onshore share is higher than autumn, though, and rainfall peaks at 3.60 mm/day. Water temp has fallen to 14.3°C and average air temp is only 12.6°C - proper winter gear is non-negotiable. Be picky with the windows, but when the N/NE quadrant kicks in, the reward is a world-class, heavy Southern Ocean day.
Average Spot conditions at Johanna in July
Swell history for July
Wind history for July
Swell quality
Analyze the groundswell consistency at Johanna during July. 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 Johanna for your next trip in July.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Johanna for July. 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 Johanna.