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June 2018 is Typhoon Preparedness Month

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Flood Advisory in Effect for Central and Northern Guam

PUBLIC ADVISORY

Flood Advisory in Effect for Central and Northern Guam

Issued: September 9, 2026 — 7:30 a.m. ChST

The Guam Homeland Security/Office of Civil Defense (GHS/OCD) advises residents that the National Weather Service (NWS) Tiyan has issued a Flood Advisory for central and northern Guam, in effect until 9:00 a.m. ChST this morning, Wednesday, September 9, 2026.

Current Status

High Surf Advisory and High Rip Current Risk Remain in Effect for Guam

High Surf Advisory and High Rip Current Risk Remain in Effect for Guam

Issued: September 3, 2026 — 6:41 a.m. ChST

The Guam Homeland Security/Office of Civil Defense (GHS/OCD) advises residents that a National Weather Service (NWS) High Surf Advisory and High Rip Current Risk remain in effect for west-facing reefs of the Marianas. The High Surf Advisory is in effect until 4 p.m. ChST Friday, September 4, 2026. The High Rip Current Risk remains in effect through Friday afternoon.

Test Announcement of Advanced Warning Systems

The Offices of Guam Homeland Security and Civil Defense (GHS/OCD), U.S. Naval Base Guam (NBG), and Andersen Air Force Base (AAFB) will conduct routine testing of the vital communication and advance warning system sirens, respectively, on Tuesday, September 1, 2026, starting at 3:15 p.m.

GHS/OCD will test the All Hazards Alert Warning System (AHAWS) sirens in conjunction with NBG and AAFB monthly routine testing of the "Giant Voice (GV)" sirens.

GHS/OCD Public Advisory: Guam Not in Path of Tropical Storm Saudel (17W)

Guam Is Not in the Path of Tropical Storm Saudel (17W); GHS/OCD Monitoring Closely

Issued: 10:45 AM ChST, Friday, August 21, 2026

Based on the current National Weather Service forecast, Guam is not in the path of Tropical Storm Saudel (17W). There are no tropical storm or typhoon watches or warnings in effect for Guam. Saudel is passing well east of Guam and moving northwest toward the far Northern Mariana Islands.

PUBLIC ADVISORY - Flash Flood Warning in Effect for Guam

The Guam Homeland Security/Office of Civil Defense (GHS/OCD) advises residents that the National Weather Service (NWS) Guam has issued a Flash Flood Warning for the entire island of Guam, in effect until 4:00 p.m. ChST today.

Current Conditions
Flash flooding is ongoing or expected to begin shortly. At 3:05 p.m., Doppler radar indicated thunderstorms producing heavy rain across Guam.
Between 1.2 and 2.4 inches of rain have already fallen, with an additional 2 to 3 inches possible.

PUBLIC ADVISORY: Dangerous Surf and Rip Currents; Small Craft Advisory Remains in Effect

PUBLIC ADVISORY

Dangerous Surf and Rip Currents; Small Craft Advisory Remains in Effect

Issued: 9:00 a.m. ChST, Monday, August 10, 2026

 

Dangerous surf, strong rip currents, and hazardous boating conditions remain in effect for Guam. Rip currents will be life-threatening.

Inexperienced mariners, especially those operating smaller vessels, should avoid boating in hazardous conditions.

BEACH AND REEF CONDITIONS

PUBLIC ADVISORY : Dangerous Surf and Rip Currents; Small Craft Advisory Remains in Effect

Dangerous surf, strong rip currents, and hazardous boating conditions remain in effect for Guam through Monday, August 10. Rip currents will be life-threatening.

Inexperienced mariners, especially those operating smaller vessels, should avoid boating in hazardous conditions.


BEACH AND REEF CONDITIONS
Large breaking waves of 9 to 13 feet are expected along west- and north-facing reefs through 4:00 p.m. Monday, August 10.

A high risk of rip currents remains in effect along west-, north-, and east-facing reefs through Monday afternoon.

11:20 a.m. Flood Advisory in Effect for Guam

PUBLIC ADVISORY

Flood Advisory in Effect for Guam

Issued: 11:20 a.m. ChST, Thursday, August 6, 2026

 

A Flood Advisory is in effect for Guam until 12:30 p.m. today, Thursday, August 6.

Heavy rain from training showers and thunderstorms is expected to cause urban-area and small-stream flooding, with minor flooding in low-lying and poor-drainage areas. Motorists should avoid driving through flooded roads.

FLOOD CONDITIONS

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