Best Time to Visit Istanbul 2025 — Weather & Seasons Guide

Istanbul's geography — straddling Europe and Asia across the Bosphorus — gives it a fascinating climate influenced by both continental and maritime conditions. Spring (April–May) and autumn (September–October) are widely considered the ideal times to visit: mild temperatures (18–23°C), lower crowds than peak summer, and the city looking its finest. Summer (June–August) is hot but atmospheric; winter (December–February) is cold and rainy but rewards visitors with uncrowded mosques and museum visits. This guide covers the best time to visit Istanbul month by month.