Start at Place des Lices Market around 8:30–9:00, before the August heat and crowds build. The Tuesday and Saturday market is the big one, but the square is still a pleasant local meeting place on other mornings, with cafés and the plane trees providing shade; check the exact market schedule locally, as stalls vary by day. Allow about an hour to browse Provençal produce, flowers, cheeses, olives, and fougasse—an ideal place to pick up something for later. From the square, walk downhill for roughly 10 minutes into La Ponche, Saint-Tropez’s old fishing quarter. Follow the narrow lanes toward the waterfront, taking your time around the small passages and pastel façades; this is best enjoyed without a fixed route, especially before midday.
Continue along the old harbor to Le Girelier in Vieux Port for lunch, ideally with a reservation or an early arrival in August. Expect approximately €35–€70 per person for seafood, depending on your order, and allow 1½ hours for a leisurely meal rather than a quick stop. Afterward, Musée de l’Annonciade is only a few minutes away on foot beside the Old Port. Its compact collection of modern works linked to Saint-Tropez’s former artists’ colony makes it a good one-hour visit; confirm the day’s opening hours, as museum schedules can change seasonally, and budget roughly €6–€8 for admission.
Finish at Citadelle de Saint-Tropez, about a 15–20-minute uphill walk from the port. Go in the cooler part of the afternoon—the climb is exposed in places—and allow around 1½ hours for the fortress, maritime displays, and sweeping views across the rooftops, gulf, and surrounding coast. Admission is typically around €5–€6. Comfortable shoes are worthwhile, and a taxi back toward the center is sensible if the heat is intense; otherwise, descend on foot through the quieter eastern edge of town and return to the harbor for an unhurried aperitif.