Nalvo - surf spot statistics

Best Surf Season (November - February)

During the peak of the Northeast Monsoon, Nalvo comes alive with consistent swell and favorable wind patterns. From November through February, the South China Sea is churned by powerful extratropical storms and the strengthening trade winds, sending pulses of medium to long-period groundswell toward the Philippine west coast. The average wave height hovers around 1.0-1.2m with periods in the 7.7-8.0s range, providing punchy, rideable surf that often holds enough power for carves and cutbacks. Crucially, the ideal wind frequency peaks at 52-59% during these months, with offshore flow from the east and northeast (blowing from land to sea) ensuring clean, well-shaped faces. While the dominant swell direction is from the north and north-northeast—angles that aren't perfect for this west-facing setup—the energy wraps around the island's northern points and lines up nicely along the beach. When a true west-northwest to northwest swell aligns with clear skies and light offshore winds, Nalvo delivers its best, most rippable conditions.

Fair Surf Season (March & October)

Shoulder months offer a mixed bag: October sees the transition from the Southwest Monsoon to the Northeast Monsoon, with average swell heights rising to 1.1m and periods of 7.7s. The ideal wind frequency climbs to 44%, offering more clean days than summer. March is the tail end of the NE Monsoon, with decreasing swell averages (0.7m) and periods dropping to 6.6s, but still 31% offshore wind odds. In both months, the swell window opens up to include more westerly energy—particularly October, where WNW and NW swells become more common—making for fun, sometimes excellent sessions when the synoptics align. Expect a mix of clean, rippable banks and occasional wind-affected days.

Low Surf Season (April - September)

The Southwest Monsoon dominates from June through September, bringing persistent southerly to southwesterly winds that are largely onshore for Nalvo's west-facing lineup. While the swell regime shifts to a higher percentage of optimal SSW and SW swell directions (especially June-August, where SW swell makes up over 40% of the spectrum), the accompanying wind is almost always from the south quadrant, often blowing 10-20 kph and ruining surface quality. Average wave heights are modest—0.5m in May, climbing to 0.9-1.1m in June-August—and wave periods remain in the 5.7-7.0s range, producing mostly short-period, messy surf. Ideal wind frequency drops to 15-28%, meaning that clean, glassy conditions are rare exceptions. April and May are the doldrums, with minimal swell and weak wind patterns. The few rideable days occur when a tropical cyclone in the South China Sea generates SSW or SW swell that pushes through with lighter winds—but these are fleeting. Overall, this is the time to explore other spots or rethink your travel plans.

March: Transition and Dwindle

March marks the early transition out of the Northeast Monsoon. Average swell height drops to 0.7m and period slips to 6.6s, indicating smaller, shorter-period waves. Ideal wind frequency is down to 31%, with winds shifting more toward the east and southeast—often light but variable. The swell is still mostly from N (31.5%) and NNE (30.6%), with a noticeable increase in NNW (28.3%), but the height bins show most of the energy is in the 0-0.5m and 0.5-1m categories. The stronger swells (1-1.5m) are present but only from N and NNE. Offshore flow from the east is weaker and less consistent. This is a month of declining quality; while there will be days with clean, small waves, the overall conditions are less reliable. The best chance of a fun session is early in the month when the NE monsoon still offers occasional pulses.