Sarah Day grew up in Huntington Beach and played club, high school (Edison High School), and at Cal State Fullerton. She transitioned on to the beach at the end of her sophomore year at CSUF to pursue her dreams of playing beach volleyball at the professional level.
Day entered an AVP qualifier in 2009 and qualified in her home town of Huntington Beach with Kristin Ursillo. From there, she played in all the AVP stops and began traveling overseas on the NORCECA and FIVB tours. In 2013, Day finished 2nd with Kaitlin Nielsen in the NORCECA Chula Vista event.
Day has currently been having her best season yet with partner, Olaya Pazo. They had a 5th and 7th place finish in the first two AVP events of the season. She lead the Milwaukee Open in aces and was second in digs behind Brooke Sweat.