FPMY50 PGUM 210557 ZFPGUM Zone Forecast for Guam and the Northern Marianas National Weather Service Tiyan GU 357 PM ChST Sat Mar 21 2026 GUZ001-MPZ001-212100- Guam-Rota- 357 PM ChST Sat Mar 21 2026 ...HIGH SURF ADVISORY IN EFFECT UNTIL 4 PM CHST SUNDAY ALONG NORTH FACING REEFS... ...HIGH RIP CURRENT RISK IN EFFECT THROUGH SUNDAY AFTERNOON ALONG NORTH AND EAST FACING REEFS... .TONIGHT...Partly cloudy with isolated showers. Northeast winds 10 to 20 mph. Lows around 75. Chance of showers 20 percent. .SUNDAY...Breezy at times. Partly cloudy with isolated showers. Northeast winds 15 to 20 mph with occasional gusts to 30 mph. Highs around 85. Chance of showers 20 percent. .SUNDAY NIGHT...Partly cloudy with isolated showers. Northeast winds 15 to 20 mph. Lows around 73. Chance of showers 20 percent. .MONDAY...Breezy. Partly sunny with scattered showers and isolated thunderstorms. Northeast winds 15 to 25 mph. Highs around 85. Chance of showers 40 percent. .MONDAY NIGHT...Mostly cloudy. Scattered showers and isolated thunderstorms. East winds 15 to 20 mph. Lows around 75. Chance of showers 30 percent. .TUESDAY...Mostly cloudy. Scattered showers. East winds 10 to 20 mph. Highs around 85. Chance of showers 30 percent. .TUESDAY NIGHT...Mostly cloudy with a 30 percent chance of showers. Lows in the mid 70s. .WEDNESDAY...Partly sunny with a 30 percent chance of showers and a slight chance of thunderstorms. Highs in the mid 80s. .WEDNESDAY NIGHT...Mostly cloudy with a 30 percent chance of showers. Lows in the mid 70s. .THURSDAY THROUGH SATURDAY...Partly cloudy with a 20 percent chance of showers. Highs in the upper 80s. Lows in the mid 70s. $$ MPZ002-003-212100- Tinian-Saipan- 357 PM ChST Sat Mar 21 2026 ...HIGH SURF ADVISORY IN EFFECT UNTIL 4 PM CHST SUNDAY ALONG NORTH FACING REEFS... ...HIGH RIP CURRENT RISK IN EFFECT THROUGH SUNDAY AFTERNOON ALONG NORTH AND EAST FACING REEFS... .TONIGHT...Partly cloudy with isolated showers. East winds 15 to 20 mph with gusts to 25 mph. Lows around 75. Chance of showers 10 percent. .SUNDAY...Breezy. Partly cloudy with isolated showers. Northeast winds 20 to 25 mph. Highs around 86. Chance of showers 20 percent. .SUNDAY NIGHT...Partly cloudy with isolated showers. Northeast winds 15 to 20 mph. Lows around 75. Chance of showers 20 percent. .MONDAY...Breezy. Partly cloudy with isolated showers. Northeast winds 20 to 25 mph. Highs around 86. Chance of showers 20 percent. .MONDAY NIGHT AND TUESDAY...Breezy. Mostly cloudy with scattered showers. Northeast winds 15 to 25 mph. Lows around 75. Highs around 85. Chance of showers 30 percent. .TUESDAY NIGHT AND WEDNESDAY...Mostly cloudy. A 30 percent chance of showers. Lows in the mid 70s. Highs in the mid 80s. .WEDNESDAY NIGHT THROUGH SATURDAY...Partly cloudy with a 20 percent chance of showers. Lows in the upper 70s. Highs in the mid 80s. $$