There is no bank and no ATM in Caño Negro. We highly recommend to bring enough cash (colones or dollars) for your stay. The payment with credit card is available in some establishments. Your chance to withdraw cash would be Los Chiles or Upala.
In Caño Negro the climate is always hot and humid. It has a rainy season (June to December), where the lagoons and the river are full of water, and dry season (January to April) where the lagoons are completely dry, leaving only the Frío river with water. It is certainly good to visit Caño Negro at any time of the year, but the months from January to April are the ones with the highest concentration of migratory birds.
It is advisable to bring light clothing, sun protection and mosquitos repellent. If you visit us between May and December, prepare yourself for rain and mud.