Watkins played field hockey for St. Andrew's College in a team that also included her older sister, Courtney and Gillian Pinder. She played in four Leinster Schoolgirls' Senior Cup finals, regularly playing against teams that included future Ireland team mates. In the 2006 final St. Andrew's defeated a Loreto, Beaufort team that included Hannah Matthews. 13-year-old Chloe Watkins scored St Andrew's second goal, with an assist from Courtney Watkins, in a 2–0 win.[15][16] In the 2007 final, the Watkins sisters and Gillian Pinder lost 5–0 to an Alexandra College team that featured Nicola Evans.[17] In the 2009 final St. Andrew's again faced Loreto, Beaufort and Hannah Matthews. This time St. Andrew's won 2–0 after extra time. Courtney Watkins co-captained the team and scored the second goal.[18][19][20] In the 2010 final Chloe Watkins captained St. Andrew's as they defeated an Alexandra College team that featured Deirdre Duke and Emily Beatty. Gillian Pinder scored the opening goal in a 2–0 win.[21] In 2010 Chloe Watkins and Gillian Pinder were also members of the St. Andrew's College team that won the Kate Russell All-Ireland Schoolgirls Championship, defeating Coláiste Iognáid, Galway 3–1 in the final.[3][4][22] On 10 September 2018, after their success at the Women's Hockey World Cup, Watkins and Pinder returned to St. Andrew's to share their experience with the current students at St. Andrew's.[23]
Hermes
In 2008, while still a 16-year-old schoolgirl at St. Andrew's College, Watkins, together with fellow schoolgirls, Anna O'Flanagan and Nicola Evans, was a member of the Hermes team that won the All-Ireland Ladies' Club Championships.[3][4][24] In 2008–09 Watkins was a member of the Hermes team that finished as runners up in the inaugural Women's Irish Hockey League season. Other members of the team that included Anna O'Flanagan, Nicola Evans and Gillian Pinder.[25]Deirdre Duke was also a team mate when Watkins played for Hermes.[26]
Watkins represented Ireland at the 2018 Women's Hockey World Cup and was a prominent member of the team that won the silver medal.[51][52][53][54][55] She featured in all of Ireland's games throughout the tournament, including the pool games against the United States,[56]India,[57] and England,[58] the quarter-final against India,[59] the semi-final against Spain[60] and the final against the Netherlands.[61] During the tournament Watkins scored twice in penalty shoot-outs. In the quarter-final against India she scored the winning penalty to send Ireland through to the semi-final. She also scored in the shoot out in the semi-final against Spain. In the final against the Netherlands, Watkins made her 200th senior international appearance for Ireland.[7][62][63][64]