Combine wine, sugar and 1 cup water in a small saucepan. Bring to a boil over high heat, stirring occasionally, until sugar is dissolved, about 5 minutes.
In a blender, puree berries until smooth. Strain through a fine strainer into a medium bowl, pressing on solids before discarding them. Stir wine mixture and lemon juice into liquid.
Pour into a nonreactive, shallow metal pan or bowl. Freeze, raking mixture with a fork after 1 1/2 hours and then every 30 minutes until it looks like flaked ice, about 3 1/2 hours total.