Itapeva - surf spot statistics

Best Surf Season (May - July)

The heart of the austral autumn and early winter brings the most reliable offshore wind window to Itapeva. With ideal wind percentages climbing to 37-40% and average swell heights hovering around 1.6-1.7m, these months offer the highest probability of clean, lined-up waves. The South Atlantic cranks up its storm activity, sending long-period groundswells from the S to SSE quadrant that wrap nicely into the coast. When the wind aligns from the W, WNW, or NW, the conditions are truly firing and the lineup pulses with punchy, rideable waves.

Fair Surf Season (March - April & August - September)

Shoulder months provide a mixed bag – decent swell potential but with a higher chance of onshore trades spoiling the surface. March and April still see average swell heights of 1.5 and 1.6m and periods rising from 8.8 to 9.1s, but ideal wind drops to 28-31%. August and September boast the largest average swell of the year (1.7-1.8m), yet the offshore wind window narrows to 30 and 20% respectively. You’ll find good days when the synoptic pattern sets up a west-flowing land breeze, but be ready to sift through more bumpy days.

Low Surf Season (October - February)

The austral spring and summer months see the trade wind regime dominate, with persistent NE to E winds blowing onshore across the beach. Ideal wind percentages plummet to 16-29% and the swell energy, though still present (average 1.4-1.7m), is predominantly from the E to ESE – often short-period and bumpy under the fetching breezes. Occasional cold fronts can deliver brief windows of offshore flow and longer-period S/SSW swells, but consistency is low. The best chance for a glassy session comes during early-morning land breezes or strong high-pressure setups. For the committed surfer, patience is key.

October: The Onshore Grip

October ushers in spring’s full onshore regime. The average swell height remains good at 1.7m with an 8.6s period, but the ideal wind percentage drops to its lowest (16%). The swell is dominated by ENE (22.2%) and E (20.5%), with the best directional energy from SSE (11.7%) and S (8.9%) being overwhelmed by the wind. The trade wind from the NE is relentless, blowing 29.6% of the time. Surfable waves exist, but they are constantly bumped up and messy – only the occasional strong cold front or coastal trough can swing the wind into the NW for a few hours. If you’re flexible and can read the synoptic charts, you might score a clean session on a fading swell, but overall, October is a low-percentage month.