| NWS Forecast for: Guam Issued by: National Weather Service Tiyan, GU Last Update: 343 AM ChST Mon Jul 20 2026 |  |
| Today: Mostly cloudy with isolated showers in the morning, becoming scattered over guam before noon and over saipan and tinian in the afternoon. Southeast winds 5 to 15 mph. Highs near 88. Chance of showers 30 percent. Tonight: Partly cloudy with isolated showers. Southeast winds around 10 mph in the evening becoming light. Lows around 77. Chance of showers 20 percent. Tuesday: Partly cloudy with isolated showers. East to southeast winds 5 to 10 mph. Highs around 88. Chance of showers 20 percent. Tuesday Night And Wednesday: Mostly cloudy with scattered showers and isolated thunderstorms. East to southeast winds 5 to 10 mph. lows around 77. Highs around 87. Chance of showers 30 percent. Wednesday Night And Thursday: Mostly cloudy. A 30 percent chance of showers and a slight chance of thunderstorms. Lows in the upper 70s. Highs in the upper 80s. Thursday Night Through Friday Night: Breezy at times. Mostly cloudy with a 50 chance of showers and a slight chance of thunderstorms. Lows in the upper 70s. Highs in the mid to upper 80s. Saturday Through Sunday: Mostly cloudy with a 40 percent chance of showers and a slight chance of thunderstorms. Highs in the mid to upper 80s. Lows in the upper 70s. | |
| Zone Forecast: Guam | |
Visit your local NWS office at: https://www.weather.gov/gum |