Water temperature is perhaps the most critical variable in tea brewing. Too hot, and you'll extract bitter tannins. Too cool, and the tea's full character won't develop.
Green teas are delicate and require cooler water (160-180°F) to preserve their sweet, grassy notes. Oolong teas need medium-hot water (185-205°F) to unfold their complex flavors. Black teas demand full boiling water (200-212°F) to release their robust character.
Investing in a variable temperature kettle is one of the best decisions you can make for your tea practice. It allows precision and consistency, ensuring each cup reaches its full potential.