July is the first month of inter-monsoon season and the weather begins to pick up again, becoming much drier. Being the natural world, the exact date of the monsoon end can’t be predicted, so to be cautious you can travel a bit later in the month, ensuring you avoid any tail end rains. Of recent years, the monsoon has been running a little later than previously, but these are just short, intermittent showers anyway.
At this time, the east coast is dry and the beaches sunny. The south west will be subject to the odd shower, but nothing to write home about, especially when you consider the average temperature across the whole islands is a perfect 29°C.