What is the best water temperature for brewing light roast coffee?

The industry standard for brewing, established by the Specialty Coffee Association (SCA), suggests a range of 195°F to 205°F (90°C–96°C). However, treating this as a static rule ignores the physical reality of the coffee bean. Light roasts are roasted for shorter durations, leaving the cellular structure of the bean dense and rigid. This structural integrity makes it significantly harder for water to penetrate the grounds and dissolve the desired compounds. From a producer’s perspective, this is the final step in honoring the work done at the farm level; if you fail to extract the delicate floral or fruit notes inherent in high-altitude, high-quality beans due to insufficient heat, you are effectively muting the terroir the producer worked all season to cultivate. A common misconception is that higher temperatures automatically lead to bitterness. In reality, bitterness is more frequently a byproduct of over-extraction caused by grind size or contact time. If your light roast tastes thin or sour, the issue is likely under-extraction, which higher water temperatures can help correct. Interestingly, recent research from the UC Davis Coffee Center suggests that if brew strength and extraction yield are held constant, sensory differences between temperature variations may be less perceptible than historically assumed. Nevertheless, for the home brewer, temperature remains the most accessible lever to manipulate extraction efficiency. By pushing toward 205°F, you provide the necessary energy to unlock the complex, volatile aromatics that define a superior light roast, ensuring the cup reflects the quality of the green coffee rather than the limitations of the brewing process.