What water temperature for matcha? The precise guide
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Most people who make bitter matcha use water that is too hot. This is the most common and easiest mistake to correct.
The golden rule: never boiling water
Water at 100°C degrades chlorophyll, burns noble amino acids (including L-theanine), and excessively extracts bitterness from tannins. The result: a bitter, greenish matcha with fewer nutrients.
The ideal range: 70 to 80°C.
- 70°C: Ideal for high-quality ceremonial matchas (like Saemidori). Preserves all fine aromas, no bitterness.
- 75°C: The best compromise for most premium matchas. Balances flavor extraction and sweetness preservation.
- 80°C: Acceptable for lower-grade matchas or culinary matcha used as a beverage.
Did you know?
The Japanese have a term for water at the right temperature: yuzamashi (湯冷まし). The art of letting water cool just enough is considered a full step in the tea ritual.
How to reach 70-80°C without a thermometer
Method 1 — Let boiling water cool: Boil the water, then wait 4 to 5 minutes. Water loses about 5-8°C per minute in an open kettle. To speed it up, pour the water into the bowl before adding the powder.
Method 2 — Mix hot water + cold water: 2/3 boiling water + 1/3 cold water ≈ 70°C. Simple, quick, effective.
Method 3 — Adjustable kettle: Variable temperature kettles (available from 30-40€) allow precise temperature setting. Very practical for regular enthusiasts.
Temperature according to preparation
- Usucha (light matcha): 70-75°C
- Koicha (thick, ceremonial matcha): 80°C (the heat helps dissolve the large amount of powder)
- Matcha latte: 70-75°C for initial dissolution, then add hot or cold milk
- Iced matcha: 70°C for the base, then pour over ice cubes
What temperature concretely changes
Do a simple test: prepare two identical bowls with the same matcha, same dosage, same whisk. One at 70°C, the other at 90°C. The taste difference will be immediately noticeable: more bitter, less floral, more astringent at high temperatures.
Frequently asked questions
My matcha is bitter, is it the temperature?
This is often the primary cause. But also: insufficient quality matcha, hard tap water, or incorrect dosage. Reduce the temperature first, it's the simplest adjustment.
Can I use a microwave for water?
Not recommended. A microwave heats water unevenly and the temperature is difficult to control. Prefer a kettle.
