Kolonnawa, Sri Lanka offers 1 beach perfect for sunbathing, surfing, swimming, and more. Kolonnawa is not particularly known for specific tourist attractions or proper nouns, as it is primarily a residential and industrial suburb of Colombo. The best time to travel to Kolonnawa, Sri Lanka, is from December to March, with average air temperatures around 27°C (81°F) and water temperatures near 28°C (82°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!