What is the weather like in Istanbul in October and November?
Based on 2 discussions with 3 participants · Last activity: 23 days ago
TL;DR
Istanbul's autumn weather is unpredictable — October can bring beach-worthy warmth of +28°C or chilly evenings requiring a jacket. Pack layers to be safe.
What the community said
In October 2025 it was cool overall — warm during the day but requiring a sweatshirt in the evenings. In contrast, October 2024 had excellent weather throughout the month.
23 days ago October: warm days, cool evenings
Weather varies greatly year to year: October 2024 saw temperatures up to +28°C with swimming in the sea, while October 2025 was noticeably cooler. November 2025 turned out warmer than expected.
23 days ago +28°C in October 2024, swimming possible
Istanbul's weather is notoriously unpredictable in autumn. October, November, and even December can feel similar temperature-wise. December evenings on the Bosphorus ferry can be very cold, while October mornings may bring heavy rain. The best strategy is to pack multiple layers, from light to warm.
23 days ago Tip: pack multiple clothing layers