FPMY50 PGUM 200520 ZFPGUM Zone Forecast for Guam and the Northern Marianas National Weather Service Tiyan GU 320 PM ChST Fri Mar 20 2026 GUZ001-MPZ001>003-202100- Guam-Rota-Tinian-Saipan- 320 PM ChST Fri Mar 20 2026 ...HIGH SURF ADVISORY NOW IN EFFECT UNTIL 4 PM CHST SATURDAY ALONG NORTH FACING REEFS... ...HIGH RIP CURRENT RISK NOW IN EFFECT THROUGH SATURDAY AFTERNOON ALONG NORTH AND EAST FACING REEFS... .TONIGHT...Partly cloudy with isolated showers. Northeast winds 10 to 15 mph. Lows around 75. Chance of showers 20 percent. .SATURDAY THROUGH MONDAY...Partly cloudy with isolated showers. Northeast winds 10 to 20 mph. Highs around 85. Lows around 75. Chance of showers 20 percent. .MONDAY NIGHT AND TUESDAY...Partly sunny with a 20 percent chance of showers. Lows in the mid 70s. Highs in the mid 80s. .TUESDAY NIGHT...Mostly cloudy with a 30 percent chance of showers. Lows in the mid 70s. .WEDNESDAY AND WEDNESDAY NIGHT...Mostly cloudy. A 20 percent chance of showers. Highs in the mid 80s. Lows in the upper 70s. .THURSDAY THROUGH FRIDAY...Partly cloudy with a 20 percent chance of showers. Highs in the upper 80s. Lows in the upper 70s. $$