Lagoa Azul (Portuguese for "blue lagoon") is a small bay in the northern part of the island of São Tomé in São Tomé and Príncipe.

It is part of the Parque Natural Obô de São Tomé.

[1] It is 4 km northwest of the town Guadalupe.

It is a popular spot for diving.

[3] This São Tomé and Príncipe geographical location article is a stub.