Indonesia is a year-round destination, but the best times to visit depend on the region and activities:

Dry season, from May to September, is the best time to visit Indonesia, with comfortable weather and minimal rain. This period is ideal for surfing, diving, and snorkeling in Bali, Lombok, and the Gili Islands. However, it's also the peak tourist season, so expect higher prices and crowds.

The shoulder season, from April to May and September to November, offers a good balance of weather and crowd levels. These periods are suitable for exploring cities, cultural attractions, and outdoor activities like hiking and rafting.

The wet season, from October to April, is characterized by heavy rainfall and high humidity. While it's not ideal for beach activities and outdoor adventures, it's a good time to visit temples, museums, and indoor attractions.

Regional variations also exist:

- Bali and Lombok: Dry season from May to September, wet season from October to April

- Sumatra and Kalimantan: Wettest months from October to February

- Sulawesi and Papua: Dry season from May to September, wet season from October to April

Additionally, consider festivals and events:

- Nyepi (Balinese New Year): Usually in March, Bali is closed for a day

- Eid al-Fitr (Islamic holiday): Dates vary, expect increased travel and festivities

- Galungan (Balinese festival): Celebrated every 210 days, colorful processions and ceremonies

Plan your trip according to your preferences and the activities you have in mind. Enjoy your time in Indonesia!