What the heck are the “dog days” anyway? The term actually comes from an ancient Greek term for the time in the summer when the dog star, Sirius, rises just before the sun. Sirius is called the Dog Star because it’s the brightest star in the constellation of the dog that follows Orion the Hunter around. The dog days might not actually be the hottest days of the year, but they often feel like it. If you can tough it out, this time of year can be really hot bass fishing, too.