Baya seasonal overview
Best Surf Season (May - September)
The core of the surf year at Baya aligns with the dry season, when the Southern Ocean storm track becomes most active and long-period groundswell is a regular visitor to Indonesian waters. From May through September, average swell heights build from 5-6ft (1.6m) up to 6-7ft (2.0m), while wave periods hold in the powerful 14.0-14.4s range. During this window, the SE trade winds become well established and the ideal surf wind percentage climbs to 64-70 percent, making it the most consistent and rewarding stretch of the year. The main trade-off is the southerly bias in the swell spectrum; pure S and SSW lines dominate, and Baya's west-southwest exposure responds best when the SSW component is strong.
Fair Surf Season (April, October - November)
The shoulder months offer very good surf but require more patience and forecast-savvy. April is the transition out of the monsoon, with periods lengthening to 13.7s and the trade winds beginning to take over. October and November are the mirror image, as the long-period S/SSW swells linger but the northwest monsoon slowly re-establishes itself. Average heights run around 4-6ft (1.2-1.8m), ideal wind percentages sit at 52-64 percent, and the quality depends on how much pure SSW vs pure S energy is in the mix. There are excellent sessions to be had, especially when lighter morning winds coincide with a strong SSW pulse.
Low Surf Season (December - March)
December through March is the monsoon-influenced low season at Baya. Average heights drop to around 4-5ft (1.4m) and periods fall to 12.4-13.1s, which is still surfable but less potent. The bigger issue is wind: west, west-northwest, and northwest flows become common, putting cross-onshore texture on the west-southwest-facing breaks. The ideal wind percentage drops to just 26-35 percent, so even when the SSW/SW swell direction is perfect, surface conditions are often lumpy and disorganized. It is not a dead period, but surfers have to work hard to find clean windows.