Istanbul in July is the hottest and busiest month of the year. Average highs reach 29.7°C (86°F), the record is 40.6°C (105°F), and Istanbul received 1,932,022 foreign visitors in July 2026. Rain is rare, with about 3.5 rainy days. Plan your sightseeing for the early morning and the evening.
Checked on 10 November 2026. We used MGM for climate averages from 1950 to 2025, the MGM Marmara sea report for water temperature, and the provincial tourism directorate for visitor counts and nationality shares. We worked out daylight times ourselves for 2027.
Istanbul in July: weather, sea and daylight
| Long-term average | July |
|---|---|
| Daytime high | 29.7°C (85°F) |
| Night low | 20.5°C (69°F) |
| Rainy days | 3.5 |
| Monthly rain | 22.1 mm |
| Warmest day on record | 40.6°C (105°F) |
| Coldest day on record | 13.6°C (56°F) |
| Sea of Marmara, average water temperature | 23.4°C (74°F) |
The water figure is the 1970–2025 monthly average for the whole Sea of Marmara, not for the Bosphorus or the Black Sea beaches, so a local beach can feel colder.
The sun rises near 05:35 and sets near 20:40 on 1 July 2027. By 15 July it rises near 05:44 and sets near 20:36, so daylight lasts 14h52m. You can see the old city at dawn and be on the water by sunset.
Who visits Istanbul in July?
| Top nationalities, July 2026 | Share of arrivals |
|---|---|
| Russia | 10.93% |
| Germany | 9.25% |
| Iran | 5.43% |
| United States | 5.33% |
| Saudi Arabia | 4.24% |
| United Kingdom | 4.11% |
| France | 3.89% |
Compare that with January, when the United States ranked fifth at 4.46%. In July the United States moves to fourth. Air arrivals reached 1,872,978, up 3.65% on July 2025, and arrivals by sea fell 18.23% to 59,044.
How busy is Istanbul in July?
| Foreign visitors to Istanbul | Number |
|---|---|
| July 2024 | 1,905,146 |
| July 2025 | 1,879,266 |
| July 2026 | 1,932,022 (+2.81%) |
Istanbul in July: daylight through the month
| 2027 | Sunrise | Sunset | Daylight |
|---|---|---|---|
| 1 Jul | 05:35 | 20:40 | 15h05m |
| 15 Jul | 05:44 | 20:36 | 14h52m |
| 31 Jul | 05:58 | 20:23 | 14h25m |
July is the month the days start to shorten. Between 1 and 31 July the sunrise moves later by about 23 minutes and the sunset earlier by about 17 minutes, so daylight shrinks by about 40 minutes.
July against June and August
The average high rises from 27.1°C in June to 29.7°C in July, and stays at 29.7°C in August. Rain is rarest in July at 22.1 mm. The Sea of Marmara averages 23.4°C, up 3.2°C on June, and reaches 24.2°C in August. Night lows of 20.5°C mean evenings stay warm, so you will want air conditioning in your room.
15 July: a public holiday
15 July is the Democracy and National Unity Day, a public holiday in Türkiye. Expect commemorations, and check opening days. Our closing days guide shows the weekly closures to plan around.
How to handle the heat
- Start at opening time. The palaces and mosques are less crowded then.
- Drink bottled or filtered water. See our health guide for sun and heat advice.
- Rest between 13:00 and 16:00 in a museum or a shaded garden.
- Use ferries as air-conditioned breaks. Our fare comparison shows the cost.
Per day, the official count gives about 62,320 foreign arrivals in July 2026, the highest daily rate among the months we compare. That compares with about 55,290 a day in June 2026. It is our own division of the monthly total.
A July day built around the heat
| Time | Plan |
|---|---|
| 08:30 to 12:30 | Outdoor sights, such as the old city |
| 13:00 to 16:00 | Lunch, then a museum, cistern or hotel rest |
| 17:00 to 20:30 | Ferry, waterfront walk or park |
| After 20:30 | Dinner, once the sun has set |
These times are our own suggestion. The Basilica Cistern is a cool midday stop, and our Galata Tower museum notes help if you want an indoor floor-by-floor visit.
Packing list for a July trip
- Loose, light clothing that still covers knees and shoulders for mosques.
- A sun hat, sunglasses and strong sun cream.
- A refillable water bottle.
- Sandals or shoes that cope with hot stone.
Should you visit Istanbul in July?
It suits sun lovers and swimmers. If heat and queues bother you, choose June or September. Our weather table lays out the alternatives.
July questions answered
What is the record temperature?
The hottest day on record reached 40.6°C (105°F).
Does it rain?
Seldom. MGM counts about 3.5 rainy days.
