Ral Island - surf spot statistics

Best Surf Season (October - March)

The North Pacific swings into action as the monsoon trough retreats, sending long-period groundswell marching toward Ral Island from the NNE and NW quadrants. Average wave heights hover around 1.2-1.3m with periods frequently reaching 10-10.5s, offering powerful, rippable waves. However, the tropical wet season brings a dominance of NW-to-N winds that are onshore and often ruin the surface. The window for ideal offshore S/SSW winds remains narrow (17-30% of the time), so patience and a sharp eye on the forecast are key. When a high-pressure system settles to the south, the winds align, and the island lights up with clean, hollow walls.

Fair Surf Season (April - May & September)

As the monsoon transitions to the southeast trade wind regime, the frequency of clean offshore breezes climbs dramatically (39-66% ideal wind). Swell heights drop to the 0.9-1.0m range, and periods shorten slightly to 8.8-9.6s. While the waves become more playful and fun-sized, the lack of real grunt means groveling and small-wave boards come into play. The trade winds from the E/ESE blow offshore for the south-facing points, but at Ral Island they are cross-onshore; however, the southern quadrant winds (S, SSW) become more common during these shoulder months, delivering that elusive glassy texture. This is the time for uncrowded, fun sessions without the hassle of the wet-season gales.

Low Surf Season (June - August)

The depths of the southeast trade wind season lock in a relentless pattern: strong, consistent E to ESE winds that blow onshore across the north-facing beach, while swell production shifts to short-period, small easterly windswell. Average wave heights bottom out at just 0.8m with periods a feeble 7.6-8.0s. The dominant swell from ENE and E is far from the optimal N/NNE directions, so the waves lack power and shape. On the plus side, offshore wind percentages reach their annual peak (63-64%), but the swell is simply too weak to turn that into quality surf. Only the occasional long-range pulse from a distant North Pacific storm can break the monotony, but those are rare. This is the low season – best saved for exploring reefs or working on your tan.

May: Clean but Small

May sees a further drop: average swell height 0.9m, period 8.8s. NE (54.5%) and ENE (22.2%) swells dominate, with NNE dropping to 14.7%. The waves are small and lack power – more suited to a longboard or a fish. The trade wind regime is now in full swing: E and ESE winds combine for 38.7% of the time, but ideal offshore S/SSW winds account for 53% of the month – the best ratio so far. The catch is that the swell is so puny that even clean conditions only produce fun-sized, groveling waves. Still, for the surfer who loves small-wave finesse, May delivers consistency and empty lineups.