August in Istanbul averages highs of 29 °C (84 °F) and lows of 22 °C (71 °F), with about 2 rainy days and 13 h 48 min of daylight.
August weather in Istanbul at a glance
average high to low each dot ≈ 3 rainy days
Is August a good time to visit Istanbul?
Good time to go: hot and fairly dry. August is usually shoulder season in Istanbul: fewer crowds than peak months, with prices often a little lower.
Our rule: a month scores 2 points for comfortable average highs of 18–28 °C (1 point for 14–18 or 28–32 °C) and 2 points for 5 or fewer rainy days (1 point for 6–10). Average highs above 35 °C or below 8 °C make it a tough month whatever the rain. A rainy day here means 2 mm of rain or more. 4 points = great, 3 = good, 2 = mixed, 0–1 = tough.
Holidays and events in August 2026
- Sun 30 Aug: Victory Day (Zafer Bayramı) public holiday
Banks and many shops close on public holidays, and museums may change their hours, so check before you go.
Things to do in Istanbul in August
August's weather suits a mix of outdoor sights and museums, so the open-air ones come first.
- Bosphorus ferry — public ferries cost little outdoors
- Galata Tower and Karaköy — sunset views outdoors
- Hagia Sophia — dress modestly, closed to visitors at prayer times indoors
- Topkapı Palace — plus the Harem indoors
- Blue Mosque — free indoors
- Grand Bazaar and Spice Bazaar — closed on Sundays indoors
Where to stay: Sultanahmet for the big sights; Karaköy or Galata for food and nightlife; Kadıköy for the Asian side.
What to pack for Istanbul in August
- Summer clothes, sunglasses and sunscreen.
- Clothes that cover shoulders and knees for mosques and temples.
- Comfortable walking shoes.
What a day in Istanbul costs
| Budget traveller | Mid-range | |
|---|---|---|
| Typical total per person, per day | €40–115 | €130–300 |
Excluding flights. August is usually shoulder season in Istanbul: fewer crowds than peak months, with prices often a little lower.
August in nearby cities
| City | High / low | Rainy days | Verdict |
|---|---|---|---|
| Athens | 33° / 23° | 1 | Mixed weather |
| Santorini | 28° / 23° | 0 | Great time to go |
| Dubrovnik | 30° / 22° | 4 | Good time to go |
Plan your Istanbul trip
- 3 Days in Istanbul Itinerary: First-Timer's Plan for 2026
- Is Istanbul Expensive? A Realistic Budget Guide for 2026
Want the whole trip planned? Join the Journey waitlist: tell it where, when and your budget, and it plans every day hour by hour.
FAQ
Is August a good time to visit Istanbul?
By the numbers, August is a good time to go: hot and fairly dry, with average highs of 29 °C (84 °F) and about 2 rainy days. August is usually shoulder season in Istanbul: fewer crowds than peak months, with prices often a little lower. The best months for weather are October.
How warm is Istanbul in August?
Average highs are 29 °C (84 °F) and lows 22 °C (71 °F) (2015–2024 averages).
Does it rain a lot in Istanbul in August?
Expect about 2 days with 2 mm of rain or more, about 20 mm in total. It is the driest month of the year in Istanbul.
Sources: climate averages from Open-Meteo historical weather (ERA5 reanalysis, 2015–2024); sea temperatures from the Open-Meteo marine API (2023–2024); public holidays from Nager.Date. Daylight is calculated for the 15th of the month. Averages are a guide, not a forecast. Costs are typical ranges per person per day, excluding flights.