5 alerts are in effect for Guam as of 6:39 AM GMT+10.
Open the live map on Guam Get a message when a warning reaches your address
The map shows radar, every warning shape, and the path and arrival time of each storm cell headed toward the center of Guam. Tap your own street on it for times that apply to you.
TYPHOON WARNING IN EFFECT
Make the final preparations to protect life and property. Rush to completion the hardening of your home or business by closing shutters and bracing garage doors. If evacuating, leave as soon as possible. Guard against being stuck out on roadways when dangerous winds and heavy rains arrive. Again,…
HIGH SURF WARNING REMAINS IN EFFECT FROM 5 PM SATURDAY TO 4 AM CHST MONDAY... ...COASTAL FLOOD WATCH REMAINS IN EFFECT FROM SATURDAY AFTERNOON THROUGH LATE SUNDAY NIGHT
Everyone should remain out of the water due to life-threatening surf conditions. Stay off of jetties, piers, and other waterside infrastructure.
FLOOD WATCH REMAINS IN EFFECT THROUGH SUNDAY AFTERNOON
You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.
HIGH SURF WARNING REMAINS IN EFFECT FROM 5 PM SATURDAY TO 4 AM CHST MONDAY... ...COASTAL FLOOD WATCH REMAINS IN EFFECT FROM SATURDAY AFTERNOON THROUGH LATE SUNDAY NIGHT
Everyone should remain out of the water due to life-threatening surf conditions. Stay off of jetties, piers, and other waterside infrastructure.
INCREASING POTENTIAL FOR HEAVY RAINFALL AND FLOODING THIS WEEKEND FOR THE MARIANAS
No tornado warning has included Guam in the last 12 months.
| Date | Issued | Type | Office | Product |
|---|---|---|---|---|
| Oct 10, 2026 | 11:30 AM GMT+10 | Flash flood warning | GUM | text |
| Oct 10, 2026 | 10:41 AM GMT+10 | Flash flood warning | GUM | text |
| Oct 2, 2026 | 9:45 AM GMT+10 | Flash flood warning | GUM | text |
| Sep 19, 2026 | 8:49 PM GMT+10 | Flash flood warning | GUM | text |
| Sep 9, 2026 | 4:38 PM GMT+10 | Flash flood warning | GUM | text |
| Sep 9, 2026 | 3:02 PM GMT+10 | Flash flood warning | GUM | text |
| Sep 6, 2026 | 7:15 PM GMT+10 | Flash flood warning | GUM | text |
| Aug 30, 2026 | 7:35 PM GMT+10 | Flash flood warning | GUM | text |
| Aug 30, 2026 | 5:33 PM GMT+10 | Flash flood warning | GUM | text |
| Aug 26, 2026 | 6:57 AM GMT+10 | Flash flood warning | GUM | text |
| Aug 19, 2026 | 3:05 PM GMT+10 | Flash flood warning | GUM | text |
| Aug 6, 2026 | 12:48 PM GMT+10 | Flash flood warning | GUM | text |
A warning counts here if the Weather Service listed Guam in it, even if the warned area covered only part of the county.
Alerts come from the National Weather Service and refresh every minute. Past warnings come from the Iowa Environmental Mesonet's archive of Weather Service products. During a warning, also listen to local radio, TV or a weather radio.