Açude Carnaúba is a reservoir of approximately 1.3 square miles located in the municipality of Santana do Acaraú, in the state of Ceará, Brazil, at roughly -3.556488, -40.15818. It sits in the semi-arid interior of Ceará and serves as an important water source for the surrounding region.

Access to the reservoir is private, and no formal boat ramps or designated public access points exist. Paddlers should verify land ownership and obtain any necessary permissions before attempting to launch. Brazilian federal law requires recreational vessels to be registered with the Navy (DPC) and to carry a valid Vessel Inscription Title (TIE/TIEM) before operating on inland waters.

The reservoir is used locally for fishing and general leisure. Nearby water bodies within roughly ten miles include Lagoa Do Serrote (4.6 miles), Açude Caraúba and Açude Ouricuri (both approximately 6.9 miles away), and Açude Santa Rita (8.7 miles away), which may be relevant for paddlers exploring the broader area.

The climate in this part of Ceará is hot and semi-arid. Daytime temperatures in the area typically range from around 21°C at night to 32°C during the day, consistent with the region's tropical conditions. The landscape around the reservoir is noted for its natural character and sunset views over the water.

Formal paddling infrastructure, water quality data, seasonal water level fluctuations, and specific hazards at this location remain undocumented. Given the private access designation and the absence of documented facilities, paddlers should conduct thorough on-the-ground research before planning a trip here.