Yes, it is possible to get a Portuguese translation free if you are happy with a rough and ready translation, which just gives you the basic meaning of the text. There are a number of resources available to you.
Portuguese Machine Translations
If the quality of your Portuguese translation is not that important, then a machine translation may be your best option. Bear in mind that machine translators for the Portuguese language vary in quality.
Free web translation widgets
If you are looking for a simple free translation of a Portuguese website, then your best bet might be to get a free website translation widget.