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Conditions at Gnaraloo in January
January: Midsummer Offshore Grind
January's midsummer pattern leaves Gnaraloo with an average wave height around 4-5ft (1.3-1.4m) and an average period of 11.0s-solid and rideable, but without the long-period punch of winter. The swell board is completely dominated by SSW (50.7%) and SW (42.6%) directions, with less than 1% of energy arriving from the ideal N/NW window. That means a lot of Southern Ocean swell has to wrap or refract into the NW-facing pocket rather than hitting it straight on. Winds blow from the favourable S/SSW/SW quadrant a large majority of the time, but a big chunk is in the 20-40kph range, leaving only 12% truly ideal for surfing. Expect a bumpy, mostly 3-5ft (0.9-1.5m) sea on many days, with occasional clean morning windows before the seabreeze builds. Water temperature is 25.1°C, air averages 29.7°C, and rainfall is minimal at 0.64 mm/day.
Average Spot conditions at Gnaraloo in January
Swell history for January
Wind history for January
Swell quality
Analyze the groundswell consistency at Gnaraloo 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 Gnaraloo for your next trip in January.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Gnaraloo 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 Gnaraloo.