FPMY50 PGUM 190528 ZFPGUM Zone Forecast for Guam and the Northern Marianas National Weather Service Tiyan GU 328 PM ChST Thu Mar 19 2026 GUZ001-MPZ001>003-192100- Guam-Rota-Tinian-Saipan- 328 PM ChST Thu Mar 19 2026 ...HIGH SURF ADVISORY IN EFFECT UNTIL 4 PM CHST FRIDAY ALONG NORTH FACING REEFS... ...HIGH RIP CURRENT RISK IN EFFECT THROUGH FRIDAY AFTERNOON ALONG NORTH AND EAST FACING REEFS... .TONIGHT...Partly cloudy with isolated showers. Northeast winds 15 to 20 mph. Lows around 74. Chance of showers 20 percent. .FRIDAY THROUGH SUNDAY...Partly cloudy with isolated showers. Northeast winds 15 to 20 mph. Highs around 85. Lows around 75. Chance of showers 20 percent. .SUNDAY NIGHT...Mostly cloudy with a 20 percent chance of showers. Lows in the mid 70s. .MONDAY...Mostly cloudy with a 50 percent chance of showers. Highs in the mid 80s. .MONDAY NIGHT...Mostly cloudy with a 20 percent chance of showers. Lows in the mid 70s. .TUESDAY THROUGH WEDNESDAY NIGHT...Mostly cloudy with a 40 percent chance of showers. Highs in the mid 80s. Lows in the upper 70s. .THURSDAY...Partly sunny with a 20 percent chance of showers. Highs in the upper 80s. $$