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Every August, Turkey’s south coast hits a brutal 40°C. Instead of enjoying their vacation, most travellers end up hiding indoors to escape the sweltering heat. If you want a better holiday experience, you should skip August and choose September.
September is the best month for a trip to Turkey. You get the perfect balance of hot weather and comfortable air.
While August heat often forces people off the beach by 2:00 PM, September settles into a pleasant mid-30s range. The air is warm enough to feel like a true summer escape, but it is much easier to handle. Even better, the Mediterranean stays at its warmest point of the year throughout September. You can swim in perfectly heated water without the exhaustion of peak summer.
Beyond the perfect temperature, September offers the classic perks of a shoulder-season trip. Popular spots are less crowded, dining is more relaxing, and prices are often lower than in July or August. Switching your dates to September is not a sacrifice; it is a smarter way to travel.
Recent Septembers have been unusually warm. September 2023 was the hottest ever recorded in Europe, at 2.51°C above the 1991–2020 average. This shows that "shoulder season" doesn't always mean cool weather.
September marks the end of Turkey’s peak summer. Most of the country remains warm, sunny, and mostly dry. However, conditions can change significantly by region, more than a simple “weather in Turkey” search indicates. The table below reconciles figures from Rough Guides and 101 Holidays, with sea temperatures cross-checked against seatemperature.org, so you can compare regions at a glance before reading the detail further down.
| Destination | Avg. Day Temp | Avg. Night Temp | Sea Temp | Rainfall | Sunshine |
| Antalya | 31–33°C | 22–23°C | ~27°C | ~10mm | ~11 hrs/day |
| Bodrum | 29–30°C | 21°C | ~26°C | ~15mm | ~11 hrs/day |
| Marmaris | 30–31°C | 21–22°C | ~27°C | ~15mm | ~11 hrs/day |
| Istanbul | 24–26°C | 20°C | ~23°C | ~40mm | ~9 hrs/day |
| Izmir | 29°C | ~20°C* | ~24°C* | ~15mm | ~11 hrs/day |
| Cappadocia | 23–28°C | 13°C | n/a (inland) | ~10mm | ~10 hrs/day |
*Izmir night and sea temperatures are estimated from neighbouring Aegean coast data; not independently sourced.
Yes, especially on the south and southwest coasts. Antalya and the Turkish Riviera usually see daytime highs of 31–33°C. This is just a few degrees cooler than the peak in July and August. Expect plenty of sunshine and very little rain. It’s hot enough that many visitors plan beach time during the middle of the day. They explore ruins or old towns in the morning or early evening instead.
Istanbul and Cappadocia are cooler. Istanbul averages around 24–26°C during the day and drops to a comfortable 20°C at night. This is much better for sightseeing than the sticky heat of August. In Cappadocia, daytime highs reach 23–28°C, but nights drop sharply to about 13°C. So, early-morning hot air balloon flights really need a jumper.
In short, if you want guaranteed beach heat, head south. For exploring cities and historic sites without overheating, September's cooler regions are much more comfortable than midsummer.
Yes, this applies to almost the entire coastline. According to sea temperature data, Antalya and Marmaris both average about 27°C in September. Bodrum is slightly cooler at around 26°C. All these temperatures are warmer than a typical UK summer pool. These are the warmest sea temperatures of the year because the sea takes time to warm up.
In contrast, Istanbul's Bosphorus and the Sea of Marmara are cooler, averaging around 23°C. While still swimmable, they feel fresher than the Aegean and Mediterranean coasts.
Cappadocia is inland and has no sea access, so this information doesn't apply there.
The south and west coasts stay dry. Antalya, Bodrum, Marmaris, and Izmir get about 10–15mm of rain in September. This usually means just one or two short showers and around 11 hours of sunshine daily.
Istanbul is wetter, averaging 40mm of rain and 9 hours of sunshine each day. This makes it feel more like a mild UK September than a Mediterranean one. Cappadocia falls in between, with about 10mm of rain and 10 hours of sunshine daily.
None of this counts as heavy rain by UK standards. Even in Istanbul, September rain is light and spread out over the month.
Each region below is great in September. Your choice depends on whether you prefer beach time, city sightseeing, or a quieter spot.
The best beach weather features days of 31–33°C, a 27°C sea, and little rain. Resorts on the Turkish Riviera, like Side, Belek, Alanya, and Kemer, offer these conditions. That’s why many all-inclusive September holidays are here. Ancient sites like Aspendos and Perge are easier to explore now, as the midday heat is less intense by late September.
Bodrum is cooler and breezier than Antalya. It features whitewashed hillside towns, marinas, and a lively evening scene. Daytime highs reach 29–30°C, and the sea is a warm 26°C, perfect for swimming. Evenings are slightly more comfortable for exploring. The wider Bodrum peninsula, which includes Gumbet, Turgutreis, and Yalikavak, has similar weather. So, compare resort towns instead of assuming they’re all the same.
Best for sightseeing, not beach time. With highs of 24–26°C and cooler evenings, September is a great month to walk around. You can visit the Hagia Sophia, the Blue Mosque, and the Grand Bazaar without the midsummer crowds or heat. It's also one of Istanbul's drier months, as rain falls fewer days than in autumn and winter.Cappadocia
September is peak hot air balloon season. You’ll find clear skies and stable early-morning conditions. Daytime temperatures are warm enough (23–28°C) for walking in the valleys. However, pack a layer for the chilly mornings and nights. Cappadocia, on a high plateau, cools quickly after sunset. This makes it cooler than any coastal spot here. So, early risers for sunrise balloon flights should expect near-jacket weather, even after a warm afternoon.
Conditions here are like those in Bodrum and Marmaris: hot days, warm sea, and low rainfall. You also have the Blue Lagoon and the Lycian Way for beach lovers and hikers. Mornings are usually calm and clear. This makes it a great place for paragliding off Babadağ mountain in September.
September is outside UK school holidays, making it quieter and cheaper than July or August. Resorts and flights are less booked, and restaurants and attractions are calmer. Hotel and package prices usually drop from the August peak, but savings vary by year and how early you book.
The warm weather and smaller crowds make September ideal for couples, honeymooners, and adult travelers. Families can also enjoy the first week of September, right after most UK schools resume. They can check half-term dates later in the autumn, too.
Flights match hotel prices: fewer families traveling during term time means more seats and lower fares to Antalya, Bodrum, and Dalaman compared to August. However, last-minute prices may rise as UK bank holidays approach.
Pack lightweight, breathable clothing for most of the trip. But if you're visiting both coast and inland areas, bring clothes for two different climates.
Swimwear, sunscreen, and a hat for the coast, where daytime heat is close to peak summer.
A light jumper or jacket for Cappadocia or evenings anywhere inland, since temperatures drop faster after dark than on the coast.
Comfortable walking shoes for sightseeing in Istanbul or hiking near Fethiye.
Modest clothing (shoulders and knees covered) for mosque visits.
A light waterproof if you're heading to Istanbul, where September's rain, though minor, is more likely than on the coast.
Yes, this is true for most trips. September offers warm sea temperatures and plenty of sunshine. Prices are lower, and crowds are smaller compared to July or August. That's why it's often seen as the best month to visit.
It’s perfect for couples and honeymooners who prefer quieter resorts and beaches. Childfree and retired travelers can benefit from flexible pricing when they travel outside school holidays. First-time visitors will find pleasant weather for sightseeing in cities like Istanbul. They can also enjoy warm beach days along the coast. Families are welcome too, especially early in the month or during a UK half-term. However, peak summer weeks are busier due to children's activities.
Compare flights to Turkey. You can find direct routes to Antalya. Browse our holiday packages to book flights and hotels together. Contact us. We’ll help you find the perfect resort with warm seas, quiet beaches, and lower prices than in peak summer.
Quick answers to common questions. Reach out if you need more help.
Yes, particularly on the south coast, where Antalya sees daytime highs of 31–33°C. Istanbul and Cappadocia are milder, in the mid-20s.
It varies by region: roughly 31–33°C by day on the south coast (Antalya), 29–31°C on the Aegean coast (Bodrum, Marmaris), and 24–26°C in Istanbul.
Yes. Sea temperatures average 26–27°C on the Mediterranean and Aegean coasts. In Istanbul, they are about 23°C. This is warm enough for comfortable swimming almost everywhere.
Rarely on the coast, around 10–15mm for the whole month. Istanbul sees more, roughly 40mm, though it's still spread thinly rather than falling in prolonged spells.
Around 11 hours a day on the south and west coasts, 10 hours in Cappadocia, and 9 hours in Istanbul.
Yes, in Istanbul and Cappadocia, it’s great for walking. The temperatures are comfy, especially compared to peak summer. Plus, you still get plenty of sunshine.
Much quieter. September is outside UK school holidays. Resorts, flights, and attractions are less crowded than in July or August.
Yes, usually demand drops when UK schools go back. However, prices can change each year, by resort, and depending on how early you book.
Pack summer clothes and swimwear for the coast. Also, bring a light jumper for cooler evenings inland, especially in Cappadocia. Don’t forget modest clothing for mosque visits.
Yes, especially in the first week of September or during a UK half-term. The weather is still warm, but crowds and prices have dropped from the August peak.
Yes, it's one of the most popular months for couples, thanks to quieter resorts, warm evenings and lower prices than peak summer.
Antalya offers the hottest beach weather. Bodrum is cooler and more relaxed. Istanbul is best for sightseeing, not beach time.
Warm by day (23–28°C) and cool by night (around 13°C), with clear, stable skies that make it one of the best months for hot air balloon flights.
UK passport holders can visit Turkey without a visa for up to 90 days. This applies within a 180-day period, so most trips in September won’t need advance arrangements.
Yes, for most travelers. You get similar sea and daytime temperatures. Plus, prices are lower, crowds are smaller, and evenings are more comfortable.
Direct flights from the UK to Antalya, Bodrum or Istanbul typically take around 4 to 4.5 hours.
September features local harvest festivals and cultural events based on the region. Istanbul also has art and music events during this time. Check specific dates as they change each year.
Yes. It provides near-peak summer weather and warm sea temperatures. There are fewer crowds and lower prices, making it one of the best-value months to visit.
