When to visit
Croatia in September
September might be the best month in Croatia. The sea keeps its August warmth, the crowds thin every day, and prices drop while everything is still open.
- Swimming stays comfortable into early October in Dalmatia.
- Ferries start trimming departures late in the month, check island timetables.
- This is prime time for Plitvice, Istria's vineyards and city trips in one route.
Measured averages in Croatia in September
| City | Day | Night | Rain days | Sea |
|---|---|---|---|---|
| Zagreb | 22° | 13° | 10 | – |
| Split | 26° | 18° | 8 | 25° |
| Dubrovnik | 26° | 18° | 8 | 25° |
| Zadar | 25° | 17° | 8 | 23° |
| Pula | 24° | 18° | 10 | 24° |
Ten-year monthly means (2015–2024), sea 2022–2024. Data: Open-Meteo.com, CC BY 4.0.
On the calendar in Croatia in September
Summer on Gradina 2026
12 Jun - 12 Sep 2026Trsat Castle and Nugent Park, Rijeka
Culture
Open-air cinema under the walls
1 Jul - 15 Sep 2026Kino Slavica, DubrovnikFrom €6
Giostra, Poreč Historical Festival
11 Sep - 13 Sep 2026Old Town