After thoroughly cleaning and drying peaches, cut them into slices (removing pits). Remove any bruised or brown spots.
Place peach slices in blender with lemon juice and process until peaches are completely pureed.
If you don't want a pulpy peach juice, strain your nectar through a fine mesh sieve into a bowl or pitcher. Otherwise, pour peach nectar into bowl or pitcher.
Add 1 cup of water and stir. Continue adding water until desired consistency is reached. Taste the juice and add honey or agave syrup until desired sweetness is reached.
Pour peach juice into a glass and enjoy!