2023 Caldas da Rainha Ladies Open

The 2023 Caldas da Rainha Ladies Open was a professional tennis tournament played on outdoor hard courts. It was the fourth edition of the tournament which was part of the 2023 ITF Women's World Tennis Tour. It took place in Caldas da Rainha, Portugal between 18 and 24 September 2023.

Singles

 * Petra Marčinko def. 🇫🇷 Léolia Jeanjean, 6–4, 6–1

Doubles

 * Francisca Jorge / Matilde Jorge def. 🇺🇸 Ashley Lahey / 🇨🇳 Tian Fangran, 6–1, 2–6, [10–7]

Seeds

 * 1 Rankings are as of 11 September 2023.

Other entrants
The following players received wildcards into the singles main draw:
 * Sara Lança
 * Carolina Mesquita
 * 🇨🇳 Tian Fangran
 * Angelina Voloshchuk

The following players received entry from the qualifying draw:
 * Susan Bandecchi
 * 🇺🇸 Sara Daavettila
 * Olga Helmi
 * 🇫🇷 Amandine Hesse
 * 🇺🇸 Dalayna Hewitt
 * 🇺🇸 Ashley Lahey
 * 🇪🇪 Elena Malõgina
 * 🇬🇧 Eden Silva

The following player received entry as a lucky loser:
 * 🇮🇳 Riya Bhatia