Fast boats run regularly from Sanur throughout the day. Despite what you may hear, the time of day doesn't determine whether you'll have a smooth crossing. Sea conditions are influenced by tides, moon phases, and wind, and on Nusa Lembongan the wind is just as likely to settle by midday as it is to increase.

Most crossings are calm and uneventful. In the rare event that conditions become too rough for safe travel, the harbour authorities will temporarily suspend services until it is safe to operate. The last two harbour closures both took place early in the morning, with boats resuming later that same day.