Even though it is possible to heat water for tea in a microwave, it is not the best way. A kettle evenly heats the water and an electric kettle can even heat it to the right temperature to bring out the best taste in specific teas. However, the microwave might unevenly heat the water and overheat it, which is terrible for tea such as white, green, and oolong tea, which require water to be at a lower temperature than boiling. Too high, and your tea will taste bitter.