| NWS Forecast for: Guam Issued by: National Weather Service Tiyan, GU Last Update: 355 PM ChST Mon Sep 28 2026 | |
| Tonight: Mostly cloudy. Isolated showers. Light and variable winds. Lows around 78. Chance of showers 20 percent. Tuesday: 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. Tuesday Night: 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 |