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North Stradbroke Island - surf spot statistics
North Stradbroke Island seasonal overview
Best Surf Season (June - August)
Winter sets the stage for prime conditions on North Stradbroke Island. As the Tasman Sea comes alive with consistent E/SE swell trains, the dominant westerly wind regime delivers offshore breezes from W, WNW, NW, or NWN up to 26% of the time. Average wave heights hover around 1.1m with periods creeping into the 9-second range, offering punchy, rippable waves. The combination of clean offshore winds and reliable groundswell makes this the go-to window for quality sessions.
Fair Surf Season (April - May & September - October)
Transition months bring a blend of conditions. April and May still see decent swell from the eastern quadrant, but the wind patterns become more variable. Offshore winds occur 14-19% of the time, often in early mornings. September and October mark the start of spring, with increasing northerly winds and a shift toward shorter-period swell from E/ESE. The average wave period drops to 8.0-8.3s, but good days can still be found when a southerly buster or weak cold front aligns the stars.
Low Surf Season (November - March)
Summer in the subtropics means the trade winds rule. E, ESE, and SE winds are onshore and gusty, limiting offshore windows to just 11-15% of the time. While the Coral Sea pumps swell from E and ENE, it is often accompanied by chop and bump. Occasional tropical cyclones can produce large, long-period swell, but these events are rare and often come with strong onshore winds. Generally, expect small to modest waves (0.5-1.5m) and frequent choppy conditions. A winter fan's patience will be tested.
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Conditions at North Stradbroke Island in August
August: Late Winter Gems
August continues the winter trend with an average height of 1.0m and period 8.8s. Swell from SE (16.4%), ESE (15.7%), and E (15%) is evenly distributed, with SSE at 11.1%. Wind remains favorable – offshore 25% of the time. W (8.2%) and WSW (9.2%) dominate. Some days bring lighter winds and longer period swell from southern sources. The shortboard grovelers and longboarders will delight in the clean, lined-up waves. It's a solid month for consistent, uncrowded sessions.
Average Spot conditions at North Stradbroke Island in August
Swell history for August
Wind history for August
Swell quality
Analyze the groundswell consistency at North Stradbroke Island during August. 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 North Stradbroke Island for your next trip in August.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at North Stradbroke Island for August. 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 North Stradbroke Island.