in front of the niterói bus terminal, bus line 47, 47/a, 47/b can be taken to praia das flexas.

this second route is more complicated, but it adds a panoramic portion to the trip, since the boats from praça xv to niterói cross guanabara bay and offer a beautiful view of the bay, of ilha fiscal, of the sugar loaf, and of rio's downtown.

from rio's zona sul, praça xv is easily reachable via taxi in 15 minutes, or via several buses routing along copacabana and ipanema.

the metrô station estação carioca is about a 10 minute-walk away from praça xv.

on this link, the instituto estadual do ambiente (inea) provides the suitability of several beaches in niterói, including praia das flexas (flechas).