The Siamese cat breed luckily possesses a long typical life span. Cats of the energetic Asian breed often live anywhere from 15 to 20 years, and many of them certainly surpass that time frame. However, some Siamese cats pass away well before 15 years, as in all cat breeds. All Siamese cats are different and, depending on basic overall health and life circumstances, can live either very long or short lives -- not unlike human beings, in fact.