FPMY50 PGUM 161622 AAA ZFPGUM Zone Forecast for Guam and the Northern Marianas...UPDATED National Weather Service Tiyan GU 222 AM ChST Sat Oct 17 2026 GUZ001-170000- Guam- 222 AM ChST Sat Oct 17 2026 ...FLOOD WATCH REMAINS IN EFFECT THROUGH SUNDAY AFTERNOON... ...TYPHOON WARNING IN EFFECT... ...HIGH SURF WARNING IN EFFECT FROM 5 PM SATURDAY TO 4 AM CHST MONDAY... ...COASTAL FLOOD WATCH IN EFFECT FROM SATURDAY AFTERNOON THROUGH LATE SUNDAY NIGHT... .TONIGHT...Partly cloudy with isolated showers. Northeast winds 10 to 15 mph. Lows around 78. Chance of showers 20 percent. .SATURDAY...Breezy. Partly sunny with isolated showers becoming scattered heavy showers and isolated thunderstorms by midday. North winds 10 to 15 mph increasing to 20 to 25 mph in the afternoon. Highs around 85. Chance of showers 50 percent. .SATURDAY NIGHT...Tropical storm force winds. Northeast to east winds 25 to 35 mph increasing to 60 to 70 mph with gusts to 80 mph during the evening. Mostly cloudy with isolated showers becoming cloudy with scattered locally heavy showers and thunderstorms by midnight. Lows around 76. Chance of showers 50 percent. .SUNDAY...Typhoon force winds. Northeast winds, turning to southwest, 90 to 105 mph with gusts to 150 mph. Cloudy. Widespread heavy showers and scattered thunderstorms. Highs around 84. Chance of showers near 100 percent. .SUNDAY NIGHT...Tropical storm force winds. South winds 50 to 70 mph with gusts to 80 mph. Mostly cloudy. Scattered locally heavy showers and thunderstorms. Lows around 75. Chance of showers 50 percent. .MONDAY...Windy. Partly sunny with a 20 percent chance of showers and thunderstorms. Southeast winds 25 to 30 mph. Gusts up to 40 mph in the morning. Highs around 84. .MONDAY NIGHT...Breezy. Mostly cloudy with a 30 percent chance of showers. Lows in the upper 70s. .TUESDAY THROUGH FRIDAY...Partly cloudy with a 20 percent chance of showers. Highs in the mid 80s. Lows in the upper 70s. $$ MPZ001-170000- Rota- 222 AM ChST Sat Oct 17 2026 ...FLOOD WATCH REMAINS IN EFFECT THROUGH SUNDAY AFTERNOON... ...TYPHOON WARNING IN EFFECT... ...HIGH SURF WARNING IN EFFECT FROM 5 PM SATURDAY TO 4 AM CHST MONDAY ALONG ALL REEFS... ...COASTAL FLOOD WATCH IN EFFECT FROM SATURDAY AFTERNOON THROUGH LATE SUNDAY NIGHT ALONG ALL REEFS... .TONIGHT...Partly cloudy with isolated showers. Northeast winds 10 to 15 mph. Lows around 78. Chance of showers 20 percent. .SATURDAY...Breezy. Partly sunny with isolated showers becoming scattered heavy showers and isolated thunderstorms by midday. North winds 20 to 25 mph. Highs around 85. Chance of showers 50 percent. .SATURDAY NIGHT...Tropical storm force winds. Southeast winds 30 to 40 mph increasing to 50 to 60 mph with gusts to 80 mph during the evening. Mostly cloudy with isolated showers becoming scattered locally heavy showers and thunderstorms by midnight. Lows around 76. Chance of showers 50 percent. .SUNDAY...Tropical storm force winds. Typhoon force winds possible. Southeast to south winds 60 to 80 mph with gusts to 115 mph. Cloudy. Widespread heavy showers and scattered thunderstorms. Highs around 84. Chance of showers 80 percent. .SUNDAY NIGHT...Tropical storm force winds. Southeast winds 40 to 60 mph. Gusts up to 80 mph. Mostly cloudy with scattered showers and thunderstorms. Lows around 76. Chance of showers 50 percent. .MONDAY...Windy. Mostly cloudy with a 20 percent chance of showers and thunderstorms. Southeast winds 25 to 30 mph. Gusts up to 40 mph in the morning. Highs around 83. .MONDAY NIGHT AND TUESDAY...Breezy. Mostly cloudy. A 30 percent chance of showers. Lows in the upper 70s. Highs in the lower 80s. .TUESDAY NIGHT THROUGH FRIDAY...Partly cloudy with a 20 percent chance of showers. Lows in the upper 70s. Highs in the mid 80s. $$ MPZ002-003-170000- Tinian-Saipan- 222 AM ChST Sat Oct 17 2026 ...FLOOD WATCH REMAINS IN EFFECT THROUGH SUNDAY AFTERNOON... ...TROPICAL STORM WARNING IN EFFECT... ...TYPHOON WATCH IN EFFECT... ...HIGH SURF WARNING IN EFFECT FROM 5 PM SATURDAY TO 4 AM CHST MONDAY ALONG ALL REEFS... ...COASTAL FLOOD WATCH IN EFFECT FROM SATURDAY AFTERNOON THROUGH LATE SUNDAY NIGHT ALONG ALL REEFS... .TONIGHT...Partly cloudy with isolated showers. Northeast winds 15 to 20 mph. Lows around 78. Chance of showers 20 percent. .SATURDAY...Breezy. Partly sunny with isolated showers becoming scattered heavy showers and isolated thunderstorms by midday. Northeast winds 15 to 20 mph increasing to 25 to 30 mph in the afternoon. Highs around 85. Chance of showers 50 percent. .SATURDAY NIGHT...Tropical storm force winds. East to southeast winds 40 to 50 mph with gusts to 70 mph. Mostly cloudy. Isolated showers and thunderstorms becoming cloudy with scattered locally heavy showers and isolated thunderstorms near midnight. Lows around 76. Chance of showers 50 percent. .SUNDAY...Tropical storm force winds. Typhoon force winds possible. Southeast winds 40 to 60 mph with gusts to 80 mph. Mostly cloudy with scattered locally heavy showers and thunderstorms. Highs around 84. Lows around 76. Chance of showers 50 percent. .SUNDAY NIGHT...Southeast winds 30 to 50 mph with gusts to 70 mph. Mostly cloudy with scattered locally heavy showers and thunderstorms. Highs around 84. Lows around 76. Chance of showers 50 percent. .MONDAY...Breezy. Mostly cloudy with a 20 percent chance of showers and thunderstorms. Southeast winds 20 to 25 mph. Gusts up to 35 mph in the morning. Highs around 84. .MONDAY NIGHT AND TUESDAY...Breezy. Mostly cloudy. A 30 percent chance of showers. Lows in the upper 70s. Highs in the mid 80s. .TUESDAY NIGHT...Partly cloudy with a 20 percent chance of showers. Lows in the upper 70s. .WEDNESDAY THROUGH FRIDAY...Partly cloudy with a 20 percent chance of showers. Lows in the upper 70s. Highs in the mid 80s. $$