Marés allows you to access tide tables for the main seaports in Angola, Cape Verde, Guinea-Bissau, Macao, Mozambique, Portugal and São Tomé and Príncipe. You can get forecast about the time of high tide and low tide and the respective heights. You can also get the information for the current time.

The data used is provided by the Hydrographic Institute of Portugal (http://www.hidrografico.pt/).