2023 Caldas da Rainha Ladies Open – Singles

Lucrezia Stefanini was the defending champion but chose not to participate.

Petra Marčinko won the title, defeating Léolia Jeanjean in the final, 6–4, 6–1.

Seeds
• # 🇧🇷 Laura Pigossi (semifinals)

• # 🇪🇸 Nuria Párrizas Díaz (second round, retired)

• # 🇫🇷 Léolia Jeanjean (final)

• # 🇺🇦 Daria Snigur (second round)

• # Céline Naef (first round)

• # 🇬🇧 Yuriko Miyazaki (first round)

• # Petra Marčinko (champion)

• # 🇫🇷 Fiona Ferro (second round)