Green Tea Brewing Temperatures and Times

Green tea gets its reputation for bitterness mostly from boiling water. The leaves are processed to keep them close to fresh, so they are rich in delicate amino acids that taste sweet and savory, and in catechins that turn sharp and astringent when they are pulled out too fast. Hot water and long steeps tip the balance toward the harsh side.

Cooler water and shorter times keep the sweetness in front. The right numbers vary with the style: shaded Japanese teas want the gentlest treatment, while pan-fired Chinese teas tolerate a bit more heat. This guide gives starting temperatures and times by type and simple ways to hit them with a regular kettle.

Why green tea needs cooler water

Amino acids such as theanine dissolve readily even in cooler water, and they give green tea its brothy sweetness. Catechins and caffeine, which add bitterness and astringency, extract much faster as the temperature rises. Lower temperatures shift the balance toward the pleasant compounds.

Heat also affects aroma. Boiling water can make delicate, grassy green teas smell cooked or stewed rather than fresh.

Starting points by style

These are starting points for a first steep using about 2 to 3 g of leaf per 150 to 200 ml of water. Adjust to taste and to the specific tea; many sellers print their own suggested brewing on the package.

• Gyokuro: 50 to 60°C (122 to 140°F), 1.5 to 2 minutes, with more leaf, about 5 g per 100 ml
• Sencha: 70 to 80°C (158 to 176°F), 1 to 2 minutes
• Fukamushi (deep-steamed) sencha: 70 to 75°C (158 to 167°F), 45 seconds to 1 minute
• Dragon well (longjing): 75 to 85°C (167 to 185°F), 2 to 3 minutes
• Bi luo chun: 70 to 80°C (158 to 176°F), 1.5 to 2 minutes
• Gunpowder: 80 to 85°C (176 to 185°F), 2 to 3 minutes
• Bancha and genmaicha: 80 to 90°C (176 to 194°F), 30 seconds to 1 minute

Hitting the temperature without a thermometer

A variable-temperature kettle makes this easy, but it is not required. Freshly boiled water poured into a room-temperature mug or pitcher drops roughly 5 to 10°C (9 to 18°F) with each transfer. Pouring boiled water into a cup, then into the teapot, lands many teas in the right range.

Letting the kettle sit with the lid off also works: a few minutes of rest brings boiled water down to about 80°C (176°F), and longer rests bring it lower. The exact rate depends on the kettle and the amount of water, so check once with a thermometer if you can and remember the timing.

Steeping time and leaf amount

More leaf with shorter steeps tastes fuller and sweeter than less leaf steeped longer. If a tea tastes thin, add leaf before adding time. If it tastes bitter, shorten the steep or lower the temperature first.

Pour the tea off the leaves completely at the end of each steep. Leaves sitting in a small amount of leftover water keep extracting and make the next infusion harsher.

Second and third infusions

Quality loose green tea usually gives two to four good infusions. The first steep opens the leaves, so the second can often be shorter and slightly hotter. For sencha, a second steep of 20 to 30 seconds at the same temperature is common; later steeps can go a little longer and warmer.

Bagged green tea, which uses small broken leaf, extracts quickly and usually gives one good cup. Treat it gently: cooler water and 1 to 2 minutes.

Cold brewing green tea

Cold water extracts very little bitterness and plenty of sweetness, which makes it a forgiving method. Use about 8 to 10 g of leaf per liter of cold water, refrigerate for 3 to 6 hours, then strain. Keep the cold-brewed tea refrigerated and drink it within a day or two for the best flavor.

Common questions

Can I use boiling water for green tea if I steep it briefly?

You can, and a very quick steep limits bitterness, but most green teas still taste more cooked and astringent than they would at a lower temperature. Roasted styles such as hojicha and some bancha handle near-boiling water well.

Why does my green tea taste like grass or seaweed?

Some vegetal and marine notes are normal, especially in Japanese steamed teas. If the flavor is overwhelmingly grassy and sharp, the water was likely too hot or the steep too long.

Does cooler water mean less caffeine?

Cooler water and shorter steeps generally extract somewhat less caffeine than very hot water and long steeps, but the amount still depends on the leaf, the quantity used and the time.