Water Temperature Guide
Hotter water extracts faster. Set your brewer and roast to get a target temperature, and how long to leave the kettle if you don't have a thermometer.
V60, medium roast
93°C
199 °F
No thermometer? Boil, take the lid off and wait about 70 seconds.
Medium roasts sit in the middle of the range. This temperature keeps origin character and roast sweetness in balance.
Every brewer at a glance
Each line runs from the dark-roast to the light-roast temperature. Select a row to load it.
The kettle is only half the story: a cold brewer can drop the slurry several degrees. Read the water temperature guide. Brewing up high? Water boils cooler, so try the altitude adjuster.
How it works
Water temperature affects how quickly coffee compounds dissolve. This guide helps you choose a sensible starting point based on brew method and roast level.
- Use hotter water for denser, lighter roasts.
- Lower temperature when dark roasts taste harsh or ashy.
- Compare Fahrenheit and Celsius without manual conversion.
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Choose your brewing method
Each brewer has a different extraction pattern, so temperature recommendations vary.
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Match the recommendation to roast level
Light roasts generally need more heat, while darker coffees often taste better with less.
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Treat the result as your first dial-in point
If the cup tastes sharp, hollow, or bitter, make a small temperature move before changing several variables at once.
Questions
Is hotter water always better for extraction?
No. More heat can improve extraction, but it can also push bitterness or roast harshness if the coffee is already easy to extract.
Should I change temperature or grind first?
Grind is usually the first lever, but temperature is a strong second lever when roast level or brew method suggests you are outside a sensible range.
What temperature is too hot for dark roast coffee?
There is no single cutoff, but very hot water can exaggerate bitterness and ashiness in darker roasts, which is why many brewers step down from near-boiling temperatures.
Do I need a thermometer to use temperature guidance well?
It helps, but you can still get close by learning cooling times after a boil and using the same kettle routine each time.