Portuguese presidents do have some real powers, rarely used. Namely the power to throw down government and simultaneously order general elections. This has happened once - considering only the period after the 1974 revolution -, 3 years ago. They cannot veto laws, only demand a confirmation from parliament, or question proposed law's compatibility to the constitution, which will be decided by a council of judges (Constitutional Court).
Id est, to behave as a political figure, instead of someone above (or post-) politics.
