You can vary the water temperature depending on what type of tea you make. For milder teas, it is better to brew them at lower temperatures. However, for stronger teas, you will need higher temperatures. For white tea, it is recommended to use water at 160° Fahrenheit. The temperature range for green teas is 150-180 degrees. Oolong tastes best when it is around 190°F. Black tea can be brewed at 180 degrees to 212 degrees. The 212 degree mark is where herbal teas are. Like black tea, the ideal temperature for coffee is between 195 to 205. You can program many electric kettles to reach the desired temperature. Some even have temperature settings that are suitable for various tea types.