| NWS Forecast for: Guam Issued by: National Weather Service Tiyan, GU Last Update: 416 PM ChST Fri Jul 31 2026 | |
| Tonight: Mostly cloudy with scattered showers. West winds 10 to 15 mph. Lows around 78. Chance of showers 50 percent. Saturday: Mostly cloudy with scattered showers. West winds 15 to 20 mph. Highs around 87. Chance of showers 40 percent. Saturday Night: Mostly cloudy with scattered showers and isolated thunderstorms. West winds 10 to 15 mph. Lows around 77. Chance of showers 40 percent. Sunday Through Monday: Breezy. Mostly cloudy with scattered showers and isolated thunderstorms. West winds 20 to 25 mph with gusts up to 35 mph possible. Highs around 87. Lows around 77. Chance of showers 50 percent. Monday Night And Tuesday: Windy. Mostly cloudy with a 50 percent chance of showers and a slight chance of thunderstorms. Lows in the upper 70s. Highs in the mid 80s. Tuesday Night Through Thursday: Breezy. Mostly cloudy with a 30 percent chance of showers and a slight chance of thunderstorms. Lows in the upper 70s. Highs in the upper 80s. Thursday Night And Friday: Breezy. Mostly cloudy with a 40 percent chance of showers and a slight chance of thunderstorms. Lows in the upper 70s. Highs in the upper 80s. | |
| Zone Forecast: Guam | |
Visit your local NWS office at: https://www.weather.gov/gum |