The best time to visit is late spring through early fall. Summer is the most popular time, but it is also the season with massive crowds. The shoulder seasons of May-June and September-October might just offer the perfect balance of decent weather and easy accessibility. In terms of the time of day, lunchtime on Wall Street is interesting. You can watch stockbrokers and hedge fund managers running out to grab a quick bite before hurriedly running back to work for that next big transaction. Similarly, you can experience the extreme hustle and bustle of Wall Street just before the stock market’s opening bell and right after the closing bell.