Many kettles have a temperature setting for French Press coffee in the range of 195 to 205 degrees. So, if your kettle has this feature; it's best. Just press the button and the water will be ready for brewing a perfect cup of French Press coffee in a few minutes. If your kettle doesn't have temperature settings, just boil the water in the kettle and wait for a little so that the temperature of water drops to the ideal and temperature and then you can brew your coffee.