Being just 8 degrees south of the equator, Bali has a fairly even climate all year round. Average year-round temperature stands at around 30 °C (86 °F) with a humidity level of about 85%.
In April, Bali experiences the transitional period between the wet and dry seasons. The weather in Bali during April is generally warm, with temperatures ranging from 25°C to 31°C (77°F to 88°F). The island experiences a decrease in rainfall compared to the preceding wet season months, but occasional showers and some humidity can still be expected.
April is considered part of the shoulder season in Bali, which means it’s a good time to visit as the tourist crowds are generally smaller compared to the peak season. The landscape is lush and vibrant from the recent rainfall, making it a visually appealing time to explore the island.
See https://www.whereandwhen.net/when/southeast-asia/bali/nusa-dua/april for weather forecasts in Bali.