If it comes to enjoying the best beaches in Argentina, the tourist can go to the closest ones in Buenos Aires:
pinamar
Pinamar is one of the most beautiful and closest beaches that can be visited from Buenos Aires. Pinamar is about 3 hours by car, although you can take a train from the train station to Pinamar Constitucion that takes only 60 minutes.
Once in Pinamar, you will be greeted by pristine surroundings, trees, charming restaurants, and inns. The tourist will not find there the big crowds and the typical hotel chains of many tourist centers, but a relaxed beach place on vacation in Argentina.
Mar del Plata man
Mar del Plata is not only one of the most famous beach destinations in Argentina, but also one of the largest beach resorts in the country. If you are looking for a coastal town full of life, Mar del Plata is definitely the place to be and have a fun and exciting beach vacation.
Mar del Plata has plenty of restaurants, tango bars, nightclubs, a casino (Casino Central), an aquarium, a water park (Aqua Sol Water Park), and a zoo (Zoo El Paraíso).
In addition to these attractions, you can enjoy other interesting activities, such as golf, cruises, diving, fishing boat and self-guided walking tours. In fact, exploring the city on foot is one of the best ways to admire Mar del Plata's beautiful neighborhoods, such as the Los Troncos (barrio) neighborhood, which boasts some of the largest aristocratic mansions in Argentina.
The Grottoes
Las Grutas is located in Patagonia and is undoubtedly becoming one of the best beach vacation spots in Argentina due to its unspoiled location. Las Grutas beaches have some of the purest white sand and warm waters that you will find along the coast of Argentina.
Another great thing about going to Las Grutas is that it is located not far from the city of San Antonio Oeste. There, you will find tour companies offering excursions to Puerto Madryn, which is the getaway city to Patagonia.