Best time to visit Istres
Best months

May and September: sunny and warm (20–25°C) without the July–August tourist crush, and the Mistral is less frequent. Good for walking the old town an…

Best value

June and September: rooms cost 20–30% less than midsummer, 25°C highs are pleasant, and you avoid the main school-holiday rush. S…

Go in May or September for the best blend of warmth, light crowds, and calm weather.

Full guide & 14-day weather →TripSage