Hey Samuel! Here is a complete guide to Sri Linka! Click on the link and start reading... you'll find everything you need, from where to stay, where to eat, to the things to try, weather and a lot more! Hope this helps. https://www.tripoto.com/travel-guide/sri-lanka
Dear fellow traveler, July to September is the ‘inter-monsoon’ period of the year. The weather is great during this time when the temperature is high throughout the country at around 29°C. Beaches are pretty hot and dry offering an essentially good time to travel.
The only major point of focus is which side of the country is to be visited in a particular month. If you are deciding to visit the West and South coasts and discover the hillsides, December to March is an ideal time for it. However, April/May to September is best to see the Eastern Coast. Also, know that this country receives two different monsoon seasons at different times. So it implies that where one part of the country is wet, the other can be dry at the same time. With Sri Lanka’s position being close to the Equator, the temperature of this island country remains relatively constant throughout the year.