Surf forecastStatisticsHistorical report

Troncones seasonal overview

Best Surf Season (November - February)

This is Troncones’ sweet spot. As the North Pacific winter pattern settles in, the trade wind inversion weakens, allowing frequent offshore breezes from the N-NE quadrant. Swell heights average a solid 1.2-1.3m with long-period groundswell (13-14s) sourced from distant Southern Ocean storms and the occasional North Pacific fetch that wraps into the SSW shore. The result? Powerful, clean lines that peel down the beach. December and January peak with over 50% ideal wind, making for consistent, rippable waves.

Fair Surf Season (March, April, October)

Transition months bring a trade-off. In March and October, you still get reliable pulses of SSW-SW swell, but the wind becomes a gamble. Offshore mornings are common, but afternoons see increasing onshore flow from the S-SW. April sees the swell ramp up (1.4m average) and periods lengthen, but ideal wind drops to 32% – meaning you’ll need to pick your windows carefully. These months are worth chasing if you time the morning offshore window or a post-frontal shift.

Low Surf Season (May - September)

The summer doldrums and hurricane season bring the largest swell of the year (1.5-1.7m average) with plenty of punch, but the wind is persistently onshore from the S-SW over 60% of the time. Dominant wind directions (SW, WSW) destroy the wave shape, making for choppy, bumpy conditions. While you might score a clean morning if a tropical storm passes far to the south and creates a window of offshore flow, most days are ruled by textured, subpar surf. The occasional hurricane swell can deliver XXL waves, but only for the brave and experienced – and only if the wind cooperates.

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Conditions at Troncones in May

May: Big Swell, Tricky Winds

May pushes the average swell to 1.5m at 14.2s. Ideal wind drops to 31%, the lowest of the year. Swell direction is almost totally SSW (75.6%) with some S (3.8%) and SW (18.4%). This southern hemisphere groundswell is powerful and consistent. But onshore winds from SSW (6.4%), SW (16.9%), and WSW (20.1%) make for messy conditions most of the time. When a brief high-pressure ridge allows offshore N-NE flow, the waves become world-class. Be patient and pick your days – the potential is huge.

Average Spot conditions at Troncones in May

Swell history for May

0 - 0.5
0.5 - 1
1 - 1.5
1.5 - 2.0
2.0 - 2.5
> 2.5 m

Wind history for May

0 - 10
10 - 20
20 - 30
30 - 40
40 - 50
> 50 km/h

Swell quality

Analyze the groundswell consistency at Troncones 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 Troncones for your next trip in May.

Ground swell

Ground swell by size

Wind conditions

Evaluate the wind and swell alignment at Troncones 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 Troncones.

Swell with good wind

Swell with good wind by size