AOL Weather - Guam: Provides current conditions and seven-day forecast for major cities and locations, along with weather headlines, local resources and outlooks for outdoor activities and travel.
BBC Weather Centre - Country Guides: Guam: Provides climate and weather information, facts and statistics about the country.
National Weather Service: Current conditions, forecasts and public warnings. Also includes aviation and marine weather, satellite and radar imagery.
Yahoo! Weather - Guam: Offers current conditions along with five-day and extended forecasts for major cities. From the Weather Channel.