Playa Ostional - surf spot statistics

Best Surf Season (November - April)

The dry season at Playa Ostional brings a potent mix of consistent, long-period SSW to WSW swell and steady offshore trade winds from the northeast quadrant. From November through April, the North Pacific storm track fires up, sending groundswell pulses across the basin. The average swell height holds in the 1.3-1.5m range with periods often exceeding 12 seconds, delivering punchy, rippable waves. Offshore winds dominate the wind rose, with NE and ENE flows grooming the southwest-facing beach into clean lines. November and December stand out with the highest percentage of ideal wind (61% and 58% respectively), while January through April maintain a solid 40-46% ideal window, despite occasional stronger trade wind pulses. This is prime time for consistent, user-friendly surf.

Fair Surf Season (May - August & October)

As the Intertropical Convergence Zone creeps north, the rainy season sets in and the wind patterns become more variable. During May through August, the swell remains excellent—dominated almost entirely by SSW and SW directions with heights averaging 1.4-1.5m and periods of 13-14 seconds. However, the wind is less reliable. Light onshores and variable breezes become more common, though July and August still see ideal wind percentages of 62% and 51% respectively. October also falls in this category, with a mix of strong SW swell (over 95% from the SW quadrant) but a higher proportion of onshore S and WSW winds. The quality is still there, but you have to pick your days around the wind shifts.

Low Surf Season (September)

September marks the low point of the year for wind conditions. The ideal wind percentage drops to just 37%, the lowest of any month. While the swell remains powerful and consistent (over 95% from SSW/SW at 1.5m average height, 13.1s period), the wind is frequently from the S, SW, and WSW—directly onshore for Playa Ostional. This combination creates swamped, choppy conditions that ruin wave shape. The few good days come when a brief offshore flow from the east or a lull in the onshore winds coincides with a swell pulse, but overall, September is a month to approach with caution or look for alternate spots.

June: Summer Swell & Light Winds

June sees the swell pattern remain heavily dominated by SSW (72.5%) and SW (22.3%), with average height pushing to 1.5m and period 13.9 seconds. A notable 25.4% of the SSW swell is in the 1.5-2m range, plus 1.4% over 2.5m—solid, heavy surf. The wind distribution broadens, but the ideal wind percentage increases to 49%, thanks to a greater proportion of light winds (0-10kph from all directions) and a slight decrease in strong onshores. The NE trades are faint, and the onshore S and SSW winds are present but not too strong (each around 6-7%). This creates more opportunities for clean surf, though the wind is often variable. June offers a good mix of consistent swell and manageable wind, making it a favourite for those seeking pumping surf without the constant trade wind blast.