Customs and etiquette
Although visitors should take care to be sensitive to local customs, they will find that Guam is very Westernized. The atmosphere here is relaxed and friendly, especially around beach areas, although topless sunbathing by women is frowned upon as most beaches are family orientated. Although a service charge is usually built into the price of goods and meals at restaurants, tipping is common practice in the same way as it is in the US.
The official currency in Guam is the US dollar. Travelers visiting Guam from outside the US can exchange their currency at the airport upon arrival, and the moneychangers here offer the best rates on the island.
Most major credit cards are widely accepted in stores, hotels and restaurants on Guam and ATMs can be found at the airport, in some hotels, shopping malls as well as at grocery stores.
Guam is blessed with a tropical climate and the weather here is generally hot and humid. The temperature changes little throughout the year and generally rests at 26 to 30°C.
The hottest months occur just before the rainy season, which takes place from July to November. While the dry season lasts from December through June, while the months of January and February are generally the coolest, making this the most popular time to visit.