| NWS Forecast for: Guam Issued by: National Weather Service Tiyan, GU Last Update: 355 AM ChST Tue Sep 29 2026 |  |
| Today: Partly cloudy with isolated showers, becoming scattered before noon. Light and variable winds becoming west around 10 mph in the afternoon. Highs near 88. Chance of showers 30 percent. Tonight: Partly cloudy with isolated showers. Light and variable winds. Lows around 78. Chance of showers 20 percent. Wednesday Through Thursday: Mostly cloudy with scattered showers and isolated thunderstorms. West winds 10 to 15 mph. Highs around 87. Lows around 78. Chance of showers 40 percent. Thursday Night: Mostly cloudy with a 40 percent chance of showers and a slight chance of thunderstorms. Lows in the upper 70s. Friday Through Saturday: Breezy. Cloudy with showers likely and a slight chance of thunderstorms. Highs in the mid 80s. Lows in the upper 70s. Chance of showers 60 percent. Saturday Night Through Monday: Breezy. Mostly cloudy with a 50 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 |