Short answer
Keep Oia simple: spend the day on the village itself, the caldera viewpoints and quieter lanes, then add Ammoudi Bay if you want a contrasting waterside experience. Go earlier for photography and easier wandering; sunset brings the trade-off of heavier crowds.
In this guide
What this page is—and is not
This is a local Oia experience guide. It is not a Santorini stay planner, an Oia-versus-Fira comparison or a full-island itinerary.
The decision is modest: how to give one relaxed day in Oia enough depth that it feels like more than a quick sunset stop.
Start with Oia village
Give the village itself time. Wander beyond the main walkway, look for quieter lanes and use earlier parts of the day for photography before the busiest sunset period.
That is the main trade-off: earlier means easier exploration; later gives the famous sunset atmosphere but with more crowd pressure.
Prioritise the caldera views without turning the day into a checklist
The viewpoints are part of the experience, not a prescribed route of named lookouts or a timed photo circuit.
Treat them as part of the village walk. The value comes from slowing down and allowing room for the setting rather than trying to collect every possible viewpoint.
Add Ammoudi Bay for a different mood
Ammoudi Bay is the distinct optional add-on. It shifts the day from whitewashed lanes and caldera views to a waterside setting.
Allow for steps and uneven paths. Check exact access, walking difficulty and seasonal conditions for your visit rather than assuming they will suit every traveller.
Final decision
For a focused Oia day, protect village + viewpoints + Ammoudi Bay and use timing to manage crowds.
Keep this as an Oia day. Island-level accommodation, transport and duration choices need separate planning.