Indonesia uses rupiah, and cash is still king for warungs, markets, small guesthouses, ferries, and local transport. ATMs are easy to find in airports, cities, and most tourist areas, but some Bali machines reject foreign cards, so try another bank if needed. Foreign card ATM fees are often around 20,000 IDR to 75,000 IDR, and limits can be low, so bigger withdrawals help. Always choose to be charged in IDR, not USD. Avoid airport exchange counters and sketchy money changers. Bali is pricier, but much of the country is still very good value.

Indonesia is not one weather pattern, it changes by region. Java, Bali, and Lombok are usually driest from April to October, with warm days around 27°C to 32°C. Wet season is usually November to March, with short hard rain, often in the afternoon, though some storms last longer. Sumatra stays wetter and more mixed, even in wet season. Eastern islands like Flores and Komodo get a clearer dry season. Raja Ampat is the odd one, its calmer, better season is often October to April. Highlands are cooler and rainier than the coast.

The biggest real risk is transport, especially scooters and rough roads, more than violent crime. Petty theft, phone snatching, overcharging, and bad taxi games are the usual annoyances in tourist zones. Use Grab or Gojek when possible, and in Jakarta stick with Blue Bird and make sure the meter is on. Bali is generally fine at night in busy areas, but quiet roads and badly lit streets are a different story. In crowded places, keep valuables tight. Central Papua and Highland Papua are the clear no-go areas.

For city rides, use Grab or Gojek. In Jakarta, Blue Bird is the safe taxi pick. On Java, trains are the best budget move, book with KAI, Traveloka, or tiket.com. Short routes can start around 35,000 IDR, longer ones from about 100,000 IDR and up. Buses are cheaper but less comfortable and less predictable. For islands, use ferries for short hops and flights for long ones. ASDP handles major ferries, PELNI is the cheap slow ship option. Flights can change times, so keep plans loose.

Tap water is not safe to drink. The classic problem is stomach trouble, especially Bali Belly, so eat at busy places with fresh cooked food and skip stalls covered in flies. Carry diarrhea medicine and electrolytes. Mosquito protection matters because dengue and similar illnesses are around. Rabies is a real risk from dogs and monkeys, so avoid animal contact and get treatment fast after any bite or scratch. Care is much better in big cities and main tourist hubs than on remote islands, so good travel insurance is very important.

A local SIM is usually better value than a travel eSIM. Telkomsel is the safest pick for the best coverage, especially if the route goes beyond Bali and big cities. Tourist packages include 25GB for 100,000 IDR or 150,000 IDR depending on the product. IM3 is cheaper in cities, with examples like 5GB for 30,000 IDR, 7GB for 42,000 IDR, or a starter pack with 3GB for 35,000 IDR. Bring passport details, and sometimes IMEI details, when buying. Airport SIMs are convenient but often pricier than city shops.

Bahasa Indonesia is the national language, and it is one of the easier Asian languages to start. A few words go a long way. English is common in Bali, hostels, dive shops, and many tourist cafes. In Jakarta and other big cities, basic English is often enough for transport and hotels. Outside tourist areas, markets, small warungs, and remote islands can be very light on English. Learn basic greetings, numbers, terima kasih, and permisi, it helps a lot.

Daily life is polite, calm, and a bit indirect, so being pushy gets ugly fast. Indonesia is very mixed, island by island, but outside Bali many places are more conservative and more religious than first-time visitors expect. Beachwear is fine on the beach, then cover up when walking into town, eating out, or visiting homes and temples. A sarong is useful. Tipping is not a big fixed rule, small rounding up is enough in many cases. Haggling is normal in traditional markets, but not in malls or supermarkets.

Food is one of the best parts, and local meals stay cheap if you eat at warungs. A simple local meal is often around 15,000 IDR to 35,000 IDR, and many backpackers spend about 80,000 IDR to 120,000 IDR a day if they eat local. Think nasi goreng, mie goreng, nasi campur, satay, bakso, and soto. Street food is fine when it is cooked fresh and the stall is busy. Western food jumps in price fast, especially in Bali. Java and Sumatra usually give better value than Bali’s trendier beach towns.