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.

October: Swelling Into the Dry Season

October marks the onset of the transition back to more favourable conditions. The swell is overwhelmingly from the south—59.3% SSW and 35.9% SW, together over 95% of the total. Average height is 1.5m, period 12.9 seconds, with a good portion in the 1.5-2m range (16.7% from SSW, 15.7% from SW). The ideal wind percentage improves to 44% as the NE trades begin to re-establish themselves, though they are still light (NE 2.8% at 10-20kph). Onshore winds from the S and SW remain common (S 6.2%, SSW 6.6%, SW 7.2%), but there are increasing windows of offshore flow, especially toward the end of the month. The swell quality is high, and the wind is a bit more cooperative than September. October is a month of hope, with the promise of the dry season just around the corner.