Bring sugar, water, and peaches to a boil in a small saucepan. Lower heat and use a wooden spoon to stir and crush the peaches to infuse the flavor.
Once the sugar is dissolved, cover, remove from heat and let steep for 25-30 min.
Brew your tea using either a large pot or tea maker. Use more/less tea depending on how strong you prefer it, and try not to let it steep longer than 4-5 minutes or it can get bitter.
Once brewed, remove tea bags or strain out loose leaf tea and transfer to a pitcher. Refrigerate to cool.
Once your simple syrup is finished, pour into a bottle or container over a fine mesh strainer to strain out peaches. You can reserve the peaches for later use.
To serve, either set out simple syrup and add as much to the tea as you like, or add all of the simple syrup to the tea and stir. Serve tea over ice and fresh sliced peaches.