


Zone Forecast Product
Issued by NWS Tiyan, Guam
Issued by NWS Tiyan, Guam
719 FPMY50 PGUM 280540 ZFPGUM Zone Forecast for Guam and the Northern Marianas National Weather Service Tiyan GU 340 PM ChST Thu Aug 28 2025 GUZ001-MPZ001>003-282100- Guam-Rota-Tinian-Saipan- 340 PM ChST Thu Aug 28 2025 .TONIGHT...Mostly cloudy. Scattered showers becoming isolated late evening. Isolated thunderstorms. East winds 10 to 15 mph. Lows around 78. Chance of showers 40 percent. .FRIDAY...Partly sunny with scattered showers and isolated thunderstorms. East winds 10 to 15 mph. Highs around 87. Chance of showers 30 percent. .FRIDAY NIGHT AND SATURDAY...Mostly cloudy with scattered showers and isolated thunderstorms. East winds 10 to 15 mph. Lows around 77. Highs around 87. Chance of showers 50 percent. .SATURDAY NIGHT...Mostly cloudy with scattered showers and isolated thunderstorms. South winds 5 to 15 mph. Lows around 76. Chance of showers 50 percent. .SUNDAY...Cloudy with numerous showers and isolated thunderstorms. South winds 10 to 15 mph. Highs around 86. Chance of showers 60 percent. .SUNDAY NIGHT THROUGH THURSDAY...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. $$