A fan is always a good buy: it cools down during the night and prevents throat pain in the next morning. Scape every weekend you can. If you don’t have friends who have a house on the beach, you can always go the beach or upstate and return in the evening.
My favourite beach here around is Fort Tilden. There are no buldings and beach is protected by a former military area transformed into a park. No trains reach that area and beach is not as crowded as Far Rockaway or Coney Island.
The best way to reach this spot is by car, a neverending bus takes you there too. I go usually by bike, 15 milles from Brooklyn, but you can also transport your bike to Far Rockaway and ride from there to Fort Tilden. Enjoy!