Türkiye Istanbul Weather in August — Climate Guide
August in Istanbul is Excellent
August is Excellent for Istanbul.
August is similar to July with slightly higher humidity + occasional thunderstorms. Sea temperature 24°C — peak swimming.
Late August hotel prices begin declining as European school holidays end. The smart-value pick — summer weather + early shoulder-season prices.
Travel score
Midsummer peak + Korean Liberation Day + 86°F + ferry escape
August Weather at a Glance
Istanbul in August averages 86°F / 30°C high and 68°F / 20°C low. 10 hours sunshine, 30mm rain, 5 rainy days. Similar to July + 70% humidity makes it feel hotter. Sunrise 6:05 AM, sunset 8:15 PM — daylight 14h 10m.
August Travel Advice
T-shirt + shorts + SPF 30+ + light jacket nights. Istanbul Music & Sema Festival (Mevlevi whirling dervishes, Sufi mysticism) + Heybeliada Music Days (early August). August 30 Victory Day public holiday + domestic tourists. Hotel rates yearly peak.
Flying In from Overseas
Korean Liberation Day 5-day + last summer-vacation window — Seoul-Istanbul $1,550-2,400. Aug 15 week biggest jump.
August Pricing Trends
Peak — Sultanahmet 4-star $195-360/night. Beşiktaş 5-star $430-795.
Istanbul August Weather Stats
Avg High
28°C
Avg Low
19°C
Rainy Days
5
41mm total
Sunshine
10.5h
Daily avg
Humidity
67%
Warm
UV Index
9
Very high
Wind
12 km/h
Gusts 25
Sea Temp
24°C
Avg water temp
Crowds
Very busy
At attractions
August Sunrise & Sunset
Air Quality
PM2.5
27 μg/m³
PM10
54 μg/m³
Status
Moderate
Feels-Like Temperature & Wind
Feels like
Daytime
30°C
Nighttime
18°C
Humidity and wind affect how the actual temperature feels.
Wind
12 km/h
Max gust 25 km/h
Activities Recommended for August
August Travel Pros & Cons
Pros
- Sea swimming peak
- Late August hotel prices declining
- Music Festival concerts
Cons
- Continued peak crowds first 3 weeks
- Higher humidity
- Indoor visits very hot
August Events & Festivals
- Sea swimming peak
- European holidays continue
- Hotel prices declining late August
Istanbul in August — Full Picture
August is similar to July with slightly higher humidity + occasional thunderstorms. Sea temperature 24°C — peak swimming.
Late August hotel prices begin declining as European school holidays end. The smart-value pick — summer weather + early shoulder-season prices.
Istanbul Music Festival (late August - early September) brings classical music to historic venues. Hagia Eirene + Topkapi Palace courtyard concerts.
What to Wear & What to Pack
Same as July — T-shirts + shorts + swimwear. Slightly higher humidity.
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
16°C
8°C
9.3/mo
Summer (Jun·Jul·Aug)
Current27.3°C
18°C
5/mo
Autumn (Sep·Oct·Nov)
19°C
12.3°C
9.3/mo
Winter (Dec·Jan·Feb)
9°C
3.7°C
12.7/mo
Istanbul Monthly Weather Comparison
| Month | High | Low | Rain | Sun | Humid | UV | Crowd | Price |
|---|---|---|---|---|---|---|---|---|
| 8° | 3° | 13d·91mm | 3.5h | 75% | 2 | Quiet | Low season | |
| 9° | 3° | 12d·78mm | 4h | 73% | 3 | Quiet | Low season | |
| 11° | 4° | 11d·68mm | 5h | 71% | 4 | Moderate | Shoulder | |
| April (Best) | 16° | 8° | 9d·46mm | 7h | 70% | 5 | Busy | Peak |
| May (Best) | 21° | 12° | 8d·36mm | 9h | 70% | 7 | Busy | Peak |
| June (Best) | 26° | 16° | 6d·35mm | 10h | 67% | 8 | Very busy | Peak |
| July (Best) | 28° | 19° | 4d·27mm | 11h | 65% | 9 | Very busy | Peak |
| August (Best) | 28° | 19° | 5d·41mm | 10.5h | 67% | 9 | Very busy | Peak |
| September (Best) | 24° | 16° | 6d·50mm | 9h | 67% | 7 | Busy | Shoulder |
| 19° | 12° | 10d·80mm | 6.5h | 71% | 5 | Moderate | Shoulder | |
| 14° | 9° | 12d·96mm | 4.5h | 75% | 3 | Quiet | Low season | |
| 10° | 5° | 13d·116mm | 3.5h | 76% | 2 | Moderate | Shoulder |
View Other Months
Istanbul August Hotel Picks
Frequently Asked Questions
Is August a good time to visit Istanbul?
Istanbul in August is Excellent. Tourist crowds are very busy and flight/hotel prices are peak.
What's the average temperature in Istanbul in August?
Istanbul August averages a high of 28°C and a low of 19°C.
Does it rain much in Istanbul in August?
Istanbul August averages 41mm of rainfall over about 5 rainy days.
What should I wear in Istanbul in August?
Same as July — T-shirts + shorts + swimwear. Slightly higher humidity.
What time are sunrise and sunset in Istanbul in August?
Istanbul August sunrise is 06:15 and sunset is 20:00, with 13h 45m of daylight.
What's the air quality like in Istanbul in August?
Istanbul August air quality (AQI) averages 68, rated Moderate. PM2.5 averages 27μg/m³.
What activities are recommended in Istanbul in August?
In August, Istanbul is great for Sea swimming peak, Music Festival concerts, Bosphorus + Princes' Islands.
Is August peak season in Istanbul?
Istanbul August crowds are very busy and prices are peak. Advance reservations are strongly recommended.
Best Months to Visit Istanbul
View Other Months
Why you can trust weather guide
Based in Chiang Mai for 8+ years, with 30+ countries visited across Southeast Asia, Japan, and Europe. Every detail in this guide is primary-source verified as of April 2026, with prices auto-refreshed via live exchange rate APIs. This isn't AI-generated boilerplate — it's written from the perspective of someone who has actually been there.