Santorini in September
Warm sea and easing crowds
By Daan · Last reviewed October 2026
The short answer
September is one of the best months to visit Santorini.
September is one of the best months: summer heat softens, the sea is warm and crowds fall off.
September in detail
What September actually feels like
- Weather
- 21–27°C
- Warm and sunny with a very warm sea.
- Crowds
- Moderate-High
- Popular sights fill up at peak hours, so book timed entries ahead.
- Prices
- €€€€
- Higher rates, especially for central and view rooms.
+Warm sea and less pressure after mid-month.
–Cruise days can still be busy.
My tip for September
Visit Oia early in the morning rather than at sunset.
- Swimming
- Sunsets
- Wine tasting
How September compares
Against the other eleven months
2nd of 12 overall in Santorini, 1st for weather, 9th for space, 9th for value. The emptiest month is January; the best value is January.
See all twelve months for SantoriniPlan around
What’s on in Santorini in September
- Cruise ships
- Fira and Oia can feel overwhelmed when several ships are in port.
April–October
Not set on September?
Even stronger months in Santorini
Also good in September
Weather
Weather in Santorini in September
In September Santorini averages a high of 27°C (81°F) and a low of 21°C (70°F), with about 3 mm of rain or snow. The warmest month is July (around 30°C) and the coolest is January (around 14°C); the wettest month is December.
- Average high
- 27°C
- 81°F
- Average low
- 21°C
- 70°F
- Precipitation
- 3 mm
Climate data: National Observatory of Athens Monthly Bulletins. Temperatures are averages of daily highs and lows.
Quick answers
Santorini in September: the questions people ask
- Is September a good time to visit Santorini?
- September is one of the best months to visit Santorini. It ranks 2 of 12 months in Santorini overall (1 for weather, 9 for space, 9 for value). The main upside: Warm sea and less pressure after mid-month. The main downside: Cruise days can still be busy.
- What is the weather like in Santorini in September?
- Average highs are around 27°C and lows around 21°C. Expect about 3 mm of rain or snow. Warm and sunny with a very warm sea. For comparison, the warmest month is July (around 30°C) and the coolest is January (around 14°C).
- Is Santorini crowded in September?
- Crowds are moderate-high. Popular sights fill up at peak hours, so book timed entries ahead. The quietest month is January.
- How expensive is Santorini in September?
- Prices are at level 4 of 5 (€€€€). Higher rates, especially for central and view rooms. The best-value month is January.
- When is the best time to visit Santorini?
- In the CrowdFreeViews month scores, May is the best month overall (September ranks 2 of 12). The quietest month is January and the best value is January.
Ready to book September in Santorini?
Warm sea and less pressure after mid-month.
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