Coastal Saint-Tropez, France, experiences a Mediterranean climate. During this month, the region transitions from summer to autumn. Typically, daytime temperatures average in the low to mid-70s Fahrenheit (low 20s Celsius), while evenings are cooler, often dipping into the 60s Fahrenheit (high teens Celsius). Sea temperatures remain pleasant, generally suitable for swimming. The area typically receives less rainfall in this month compared to later autumn months, offering a greater chance of sunny days.
This period presents a desirable time to visit. The combination of warm, yet less intense, sunshine and fewer crowds compared to the peak summer months makes for a more relaxed experience. Historically, September has marked the end of the primary tourist season, allowing for a more authentic engagement with local culture and a quieter enjoyment of the beaches and natural beauty of the French Riviera. This calmer atmosphere can also lead to more competitive pricing on accommodations and other tourist amenities.