About Colombo Colombo, the capital of the island nation of Sri Lanka is also the commercial hub of the country. It lies in the southwest region of the nation, on the shore of Indian Ocean. The international airport is 34 Km from the city centre. Quick Facts Average temperature in Colombo: 32C Population: One million persons Typical Weather: Warm & Sunny Taj Hotels in Colombo » The Gateway Hotel Airport Garden » Taj Samudra Best Buys Colombo offers great options for shopping. A thriving garment industry with resultant choice of clothing as well as distinct handicrafts, fine Ceylon tea, spices and more.