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Conditions at Johanna in January
January: Summer Groundswell and Dawn Patrol Windows
High summer is in full swing and the swell engine is throttled back. Johanna averages 7-8ft (2.3m) of SW-dominant swell with a period around 11.8s - still powerful enough for a proper Southern Ocean groundswell, but the winter lows are absent. The directional spectrum is heavily weighted toward the SW (38.1%), with SSW and WSW adding another 22.7%; most energy falls in the 1.5-2.5m (5-8ft) range and the occasional bigger set rolls through. This is the classic summer set-up for Johanna: long waits between peaks, but when a set arrives it has real push.
The problem is wind. The true offshore quadrant from N through ENE accounts for only about 11% of the wind rose, and the daily summer seabreeze kicks in from the S/SSW/SW, putting the waves onshore. Overall conditions are clean and ideal a modest 23% of the time - normally early mornings before the sea breeze fills in. With water temps at 17.7°C and limited rainfall (1.59 mm/day), it is warm and dry, but the session window is narrow.
Average Spot conditions at Johanna in January
Swell history for January
Wind history for January
Swell quality
Analyze the groundswell consistency at Johanna during January. 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 January.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Johanna for January. 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.