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The climate of Guam can be described as a typical warm, tropical climate with two different seasons. The dry season is between December and April; the rainy season lasts from April to December, with the greatest falls between July and October. Temperatures range between 26-32°C, with the water temperature sitting on a comfortable year-round 28-29°C.

Typhoons can hit Guam from July to mid November, and can sometimes cause heavy damage, flooding and erosion. However, this is a seldom scenario, the routes of Typhoons usually are too far west to reach Guam, and not every Typhoon that hit Guam is a strong one.

Required clothing:
Lightweight cotton clothing is advised throughout the year, with an umbrella or raincoat for sudden cloudbursts. No matter where you go, be prepared for high temperatures and humidity.

Koeppen-Geiger classification:
The Climate of Guam can be classified as Af climate, a hot, humid tropical climate with all months above 18°C.