Climate and clothing

Throughout the country, expect tropical conditions, with daytime temperatures averaging 25-33 degrees Celsius, or 77-91 degrees Fahrenheit, nighttime temperatures around 22-28 degrees Celsius / 71-83 degrees Fahrenheit, and humidity around 90%. At sea and with a wind, it does get cool at dusk, and can be even chilly at night.

You are best advised to bring light, casual clothes, ideally from cotton or other natural fibers. Bringing a long-sleeved T-shirt or two is a good idea, too, as it helps protect your skin from the tropical sun. For the same reason, a hat is essential. A sweater may not be a bad idea either for those evenings out on the lounge deck.

While the wearing of footwear is not allowed (also not necessary!) aboard Tambora, you should bring a pair of sandals or slippers for any land excursions.

Water temperatures are around 27 degrees Celsius / 81 degrees Fahrenheit throughout the year. Depending on your level of comfort, a 3mm or 5mm wetsuit is recommended for all our dives.


Throughout Indonesia, and aboard Tambora, electric power is 220V/50Hz, and outlets are of the European type. Please bring your own adaptors should you require any other voltage/frequency and/or socket type.

Health and vaccinations

There are no precautions required for life aboard Tambora. Our water and food are clean and hygienic, and there are no stinging mosquitoes, sand flies or other bugs around. However, ashore things may be different in parts of Indonesia; depending on your exact travel itinerary, we recommend you check with your local medical center with respect to the need for vaccinations and malaria prophylactics. Also, we recommend you check whether your medical policy will cover you during the vacation, and, if not, purchase additional insurance.


While we will make every effort to make your cruise with us a safe as possible, we highly recommend the purchase of personal insurance coverage, including:

  • Medical insurance: check whether your existing policy will cover you during the cruise, and, if not, purchase additional insurance
  • Divers insurance
  • Travel, cancellation, and baggage insurance


In terms of diversity, with more than 500 languages spoken throughout the 13,000-plus islands of the archipelago, Indonesia has as much to offer linguistically as it has biologically! As a rule of thumb, the more remote you travel, the fewer people will speak English or any other foreign language.

Aboard Tambora, our dive guides speak English, and our Cruise Director speaks English, German and French, in addition, to Indonesian. Our Indonesian crew all speak some basic conversational English, too.


In the dive station and your guest suite aboard Tambora, there is abundant storage for all your dive gear, bags, clothes, and any other items you might bring along. However, we strongly recommend you check with your travel agent or airline for luggage requirements and restrictions on flights.

Money and payments

Upon arrival in Indonesia, we recommend you obtain a certain amount of local currency (Indonesian Rupiah, IDR), by exchanging foreign currency at the money changer, and/or by withdrawing money from an ATM carrying the Cirrus, Alto, VISA, Maestro or other international network logo using your debit or credit card. Please note that some money changers and banks may not accept worn and torn foreign currency notes. Withdrawing money from an ATM using your debit card will invariably give you a more favorable exchange rate; however limits as to the amount available per transaction or day may apply. Please also note that both money changers and ATMs are easy to find at international airports and in major tourist destinations, but are virtually non-existent in more remote parts of the country. The same holds true when it comes to the acceptance of credit cards; plan your cash needs accordingly! You will need some cash IDR to pay domestic airport taxes and, on many cruises, National Park fees; in addition, you might want to purchase local fabrics or handicraft in small villages we visit. And in case you should end up having exchanged a bit too much money in the beginning, any excess IDR can be exchanged back into US$, Euro or other major currencies easily and at a very small loss.

Payments for the use of Nitrox and/or the rental of dive gear can be made in advance together with the reservation to our bank account, or in US$ cash while on board. Payments for other consumption and purchases of goods and services on board are due in US$ cash while on board. National Park fees are due in local currency while on board. For payments due in one currency but settled in another, we will determine the applicable exchange rate based on local banking practices.

Non divers, children and infants

Special rates are available for non-divers, children and infants. Please inquire with us at the time of booking, mentioning the status (diver / non-diver) for each member of your group, as well as the age and special requirements, if any, for each child or infant.

Special requirements

Please notify us at the time of your booking request about your special requirements, e.g., need for dive gear rental, special dietary needs, special equipment or materials required, children or infants and their age and special needs. We will try to accommodate and, if necessary, prepare for your special requirements to the fullest of our means.

Visa requirements

Visitors from most countries can obtain a visa on arrival (VOA) at the cost of US$25 for a stay of a maximum of 30 day, or US$10 for a maximum of 7 days. Upon landing, simply walk to the VOA counter, produce your passport and the required fee, and your visa will we stamped right into your passport. Then, proceed to the immigration desk.

Visitors from countries that are not eligible for a VOA need to obtain a tourist visa prior to departure at the embassy or a consulate of Indonesia in their country of origin.

We recommend you check your visa and passport requirements with the Indonesian embassy or consulate, or your local travel agent.