Quick answer

Use spring and autumn for the easiest walking weather, summer for long lively days with heat and crowds, and winter for lower-pressure museums, food, hammams, and covered markets.

Month planning

This page should eventually become more detailed, but the first useful layer is simple. Match the month to how much walking, ferry time, and outdoor sightseeing you want.

When the weather is less ideal, Istanbul still works through museums, galleries, markets, food, hammams, and shorter neighborhood routes.

Planning Choices

Spring
Comfortable walking and strong first-trip fit. Check holiday dates and crowds.
Summer
Long days and lively evenings. Plan shade and slower afternoons.
Winter
Indoor-friendly and less pressured. Build in museums, food, and hammams.