The outgoing tide is usually best just following the high tide. After the high tide, you will have some time with slack water, then when the water starts moving again, the bite will pick up again. Bonefish will scatter once water levels get too low, so this is a small window to get bit during the outgoing tide. As water levels get low, bonefish will scatter off the flats towards deeper water, so remember this when positioning your flies or baits as these fish will be heading towards deeper water away from the flats.