Ultimate guide (January 2019)
is an island with the best beaches
in the group of Mariana Islands. However, local beaches are not very good by the standards of Oceania. The most interesting attractions of Guam are monuments of World War II and beautiful nature. Most tourists here are from Japan. Shore and seabed: rocks, sand.  Find hotels in Guam
Coordinates: 13.449512, 144.780333
Most hotels are located in the Tamuning district - near the popular Tumon beach. The spread of prices is pretty big. If you wish, you can easily find few good budget options. Find hotels in Guam
How to get there 
Fly to Guam International Airport (GUM)
. You can move around the island by bus, but it is better to rent a car. Find flights to Guam
When to go 
The best time to visit Guam island is a dry season from January to May.
Water temperature, C
Wind speed, meter/sec
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To save on food in Guam, I used Pay-Less supermarkets. Of course, it is best to stay in apartments with its kitchen, but the hotel will be also Ok.
Good beach is Governor Joseph Flores Beach Park + Ypao Beach Park.
It is very cheap to fly from Seoul to Guam - from $190 for the return (4.5 hours per way). For example return flight from Japan (Tokyo) starts from $260 (3.5 hours per way).
Good hotel in Guam can be found for $60 per night. Taxi from the airport to hotel in Tumon beach is about $20. Free yellow bus to the shopping center. So travel to Guam is not expensive. Highly recommend!
See also other islands nearby:
91 km to the north-east ↗
200 km to the north-east ↗
220 km to the north-east ↗
1880 km to the south-west ↙
2270 km to the north-west ↖