


Zone Forecast Product
Issued by NWS Tiyan, Guam
Issued by NWS Tiyan, Guam
501 FPMY50 PGUM 130729 CCA ZFPGUM Zone Forecast for Guam and the Northern Marianas...CORRECTED National Weather Service Tiyan GU 529 PM ChST Mon Oct 13 2025 GUZ001-MPZ001>003-132045- Guam-Rota-Tinian-Saipan- 529 PM ChST Mon Oct 13 2025 Corrected to fix wind gust units. .TONIGHT...Mostly cloudy with scattered showers and isolated thunderstorms. East winds 10 to 15 mph. Lows around 76. Chance of showers 30 percent. .TUESDAY...Mostly cloudy with scattered showers and isolated thunderstorms. East winds 15 to 20 mph with occasional gusts to 30 mph. Highs around 86. Chance of showers 40 percent. .TUESDAY NIGHT...Mostly cloudy with scattered showers, becoming cloudy with numerous locally heavy showers after midnight for Guam. Isolated thunderstorms. East winds 15 to 20 mph gusting to 30 mph near heavier showers. Lows around 75. Chance of showers 50 percent, becoming 70 percent after midnight Guam. .WEDNESDAY...Cloudy. Widespread locally heavy showers for Guam, numerous locally heavy showers for CNMI. Isolated thunderstorms. Southeast winds 15 to 20 mph with gusts to 30 mph near heavier showers. Highs around 84. Chance of showers 80 percent Guam, 60 percent CNMI. .WEDNESDAY NIGHT...Cloudy with numerous showers and isolated thunderstorms. Locally heavy showers possible. East winds 10 to 20 mph. Lows around 75. Chance of showers 60 percent. .THURSDAY...Partly sunny with scattered showers and isolated thunderstorms. East winds 10 to 15 mph. Highs around 86. Chance of showers 30 percent. .THURSDAY NIGHT THROUGH SATURDAY NIGHT...Mostly cloudy with a 20 percent chance of showers and thunderstorms. Lows in the upper 70s. Highs in the upper 80s. .SUNDAY...Partly sunny with a 30 percent chance of showers and a slight chance of thunderstorms. Highs in the upper 80s. .SUNDAY NIGHT AND MONDAY...Mostly cloudy. A 20 percent chance of showers and thunderstorms. Lows in the upper 70s. Highs in the upper 80s. $$