If you are temporarily abroad during the electoral process, you have the option of voting from abroad as long as you have previously applied to do so.
To make the application, you must be registered with the Consular Registry as a non-resident, which you can do at the same time you personally fill in the application form in consular offices or consular sections in embassies.
Once you have registered, you have to request the documentation required to vote from abroad. The period for submitting your application starts on 4 August and ends on 29 August.
You can get this application form at:
Once you have handed in the application form you have to present your National Identity Card (DNI) or Spanish passport.
The consular offices or consular sections in embassies will immediately send your application to the relevant provincial office of the Electoral Roll Office.