Start around 9:30 at Mercado Central de Alicante, when the stalls are lively but before the strongest August heat. Spend about an hour browsing fruit, pastries, fresh juice, and simple snacks for the toddler; the market is generally open Monday–Saturday until around 2:30–3:00pm, with many stalls closing earlier on Saturdays. The historic market building has limited room for a stroller, so a compact stroller or carrier is easiest. From here, walk roughly 8–10 minutes downhill through the Casco Antiguo to Concatedral de San Nicolás de Bari. Allow 30 minutes to admire the blue-and-gold interior and quiet cloister; entry is usually free for worshippers, though donations are welcome, and visitors should dress respectfully.
Continue a few minutes on foot to El Portal Alicante for lunch, ideally booking or arriving early for a shaded table. Expect approximately €25–€40 per adult, with Mediterranean dishes and enough flexibility for a toddler to share; plan on about 90 minutes rather than rushing. Afterward, take a taxi to the lower entrance of Castillo de Santa Bárbara—the steep, cobbled climb is not practical with a stroller in August. The panoramic lift from the Postiguet Beach side costs roughly €2–€3 per person each way, while castle access itself is commonly free; check the lift schedule locally, as hours can change. Give yourselves around 1½ hours for the ramparts, views, and water breaks, aiming for the later afternoon when the rock is less punishing, but bring hats and plenty of water.
Return by taxi or walk downhill if everyone still has energy, then finish on Explanada de España. Its broad, shaded promenade is easy with a stroller and makes a gentle final hour after the castle; pause for ice cream near the waterfront and let the toddler watch the boats around Alicante Marina. The promenade is free and open at all times, but in August the most comfortable stretch is after about 6:30pm. Keep the evening unhurried—this is a good place to linger rather than add another attraction, with plenty of benches and nearby cafés if the heat or tiredness catches up.
Start around 9:00 at Playa del Postiguet, before the sand becomes uncomfortably hot and the waterfront fills up. The beach is particularly easy with a toddler: shallow water, a broad promenade, showers, toilets, and nearby cafés for coffee or a quick snack. Bring sandals and a small shade tent if you have one; August sun is strong even in the morning. After roughly two hours, walk south along the waterfront toward the marina—about 10 minutes, using the flat promenade.
Spend the late morning at the Museo Volvo Ocean Race, beside the marina. Its sailing displays and interactive elements work well for young children, while the air conditioning makes it a useful escape from the heat. Allow about an hour; admission is usually free, though opening hours can vary, so check the museum’s current schedule before setting out. From there, stroll about 15 minutes along the Explanada to Casa Carbonell, pausing outside for photographs and a quick look at the ornate façade rather than trying to make this a formal visit.
Continue into the old town for lunch at La Taberna del Gourmet, around a 10-minute walk from Casa Carbonell. Arrive early, ideally around 1:00, as August lunches become busy; shared tapas, croquettes, grilled dishes, and bread make it easy to order something toddler-friendly. Budget approximately €25–€40 per adult, depending on wine and the number of dishes. Ask for an indoor table if the heat is oppressive, and keep the meal relaxed rather than adding another sightseeing stop.
After lunch, walk back toward the waterfront to Parque de Canalejas, roughly 15 minutes downhill and south of the Explanada. Its shaded paths, distinctive sculptures, and open space are a good late-afternoon reset after the beach and lunch; let the toddler wander while adults take turns with a cool drink nearby. The park is free and open throughout the day, but the shade is most welcome from about 5:00 onward. If everyone is tired, a short taxi ride back to your accommodation is usually easier than pushing a stroller through the warmer streets.