Santa Elena is located in a semi-arid zone. From December through June, most days are sunny. From July through November, most days have overcast skies. Throughout the whole year, it's warm. See Salinas and Around - Climate for a more extensive description of the climate.
Potable water is available in most areas. Aguapen is the local water utility company.
You can use urban buses to travel in the urban area of La Libertad, Santa Elena, Ballenita, and Salinas. The price for a single ride is $.036, which you can pay when you enter your bus.