Slice fresh peaches into 1/4-inch pieces and place them in a large bowl. Toss with granulated sugar, brown sugar, lemon juice, vanilla extract, cinnamon, and nutmeg until fully coated.
Pour the peach mixture into an air fryer-safe baking dish or cake pan that fits your air fryer basket. Spread the fruit evenly across the bottom, ensuring the juices distribute throughout the layer.
In a separate bowl, combine old fashioned oats, all purpose flour, melted butter, honey, salt, and chopped almonds. Mix until everything is wet and the texture resembles coarse breadcrumbs with no dry pockets remaining.
Spread the oat topping evenly over the peaches, pressing gently so it adheres but doesn't compress into one dense layer. This air fryer peach crisp family summer recipe requires an even distribution for consistent crumble texture.
Place the filled baking dish in your preheated air fryer at 350°F and cook for exactly 18 minutes until the topping turns golden brown and peaches bubble around the edges. Check at the 15-minute mark if your air fryer runs hot.
Remove the dish carefully using oven mitts since the ceramic and filling will be extremely hot. Let it rest for 5 minutes before serving so the juices set slightly and toppings firm up.