---
title: "Why Water Temperature Matters More Than You Think"
url: https://roastair.com/2026/01/28/why-water-temperature-matters-more-than-you-think/
description: "You have invested in great beans and a quality grinder. But if your water temperature is off, your coffee will suffer. Heres why it matters and how to get it…"
type: post
---

# Why Water Temperature Matters More Than You Think

You have invested in great beans and a quality grinder. But if your water temperature is off, your coffee will suffer. Heres why it matters and how to get it right.

## The Science

Water temperature affects extraction — the process of dissolving soluble compounds from ground coffee. Too hot and you over-extract, pulling out bitter, astringent compounds. Too cold and you under-extract, resulting in a sour, thin cup.

## The Sweet Spot

The Specialty Coffee Association recommends a brew temperature of 92-96°C (197-205°F). This range extracts the desirable sugars, acids, and oils while leaving behind the harsh compounds.

## Practical Tips

- **No thermometer?** Boil your kettle and wait 30-60 seconds before pouring
- **Dark roasts:** Use the lower end (92°C) as they extract more easily
- **Light roasts:** Use the higher end (96°C) as they are denser and need more energy to extract
- **Cold brew:** The exception to the rule — room temperature or cold water with a 12-24 hour steep time