Live · updated 1 min ago
Guam weather alerts
No active National Weather Service alerts for Guam, Guam right now. The most recent was a Flash Flood Warning that ended Sep 6, 8:45 PM.
13 in the last 30 days 13 in 12 months (since Aug 30) most common: High Surf Advisory Get alerts on your phone →
Active alerts for Guam
Refreshed every few minutes; times in ChST.
All clear in Guam
No warnings, watches or advisories are in effect. See what is active across the country.
Get Guam alerts on your phone before you think to look them up
Forecast Bar watches the official alert feeds around the clock, NWS in the United States and Environment Canada in Canada, and pushes every warning, watch and advisory for your saved locations the moment it is issued. This page is the same data, a few minutes later.
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Where
Guam on the map
Alert polygons are NWS's own. Forecast Bar's radar shows the same warnings over live precipitation, with future radar and lightning. See the radar.
Last 30 days
Recent alerts for Guam
| Alert | Issued | Ended | Issued by |
|---|---|---|---|
| Flash Flood Warning | Sep 6, 7:15 PM | Sep 6, 8:45 PM | Tiyan GU |
| Rip Current Statement | Sep 5, 3:56 AM | Sep 5, 4:00 AM | Tiyan GU |
| High Surf Advisory | Sep 5, 3:56 AM | Sep 5, 4:00 AM | Tiyan GU |
| Rip Current Statement | Sep 4, 3:40 PM | Sep 5, 4:00 AM | Tiyan GU |
| High Surf Advisory | Sep 4, 3:40 PM | Sep 5, 4:00 AM | Tiyan GU |
| High Surf Advisory | Sep 4, 3:50 AM | Sep 4, 4:00 PM | Tiyan GU |
| Rip Current Statement | Sep 4, 3:50 AM | Sep 4, 4:00 PM | Tiyan GU |
| Rip Current Statement | Sep 3, 4:19 PM | Sep 4, 4:00 PM | Tiyan GU |
| High Surf Advisory | Sep 3, 4:19 PM | Sep 4, 4:00 PM | Tiyan GU |
| Rip Current Statement | Sep 3, 4:47 AM | Sep 4, 4:00 PM | Tiyan GU |
| High Surf Advisory | Sep 3, 4:47 AM | Sep 4, 4:00 PM | Tiyan GU |
| High Surf Advisory | Sep 2, 6:04 PM | Sep 4, 4:00 PM | Tiyan GU |
| Rip Current Statement | Sep 2, 6:04 PM | Sep 4, 4:00 PM | Tiyan GU |
Pattern
What Guam gets alerted for
Every alert that named Guam in the last 12 months, by type. Records begin August 30, 2026, so this fills in over the year.
Plain English
What these alerts mean
A warning means the hazard is happening or about to; a watch means conditions favour it; an advisory is a lesser hazard still worth planning around.
Flash flooding is occurring or imminent. Move to higher ground; never drive into water covering a road.
Rip currents that can pull swimmers offshore are expected. Swim near a lifeguard and know how to escape a rip.
Large breaking waves are expected on beaches, with dangerous rip currents. Stay off jetties and out of the water.
Nearby
Alerts near Guam
Questions
About Guam alerts
How do I get Guam weather alerts on my iPhone?
Install Forecast Bar, add Guam as a location, and turn on severe weather alerts. Every NWS warning, watch and advisory for Guam then arrives as a push notification at the moment of issue, with Critical Alerts available for the most dangerous warnings. Forecast Bar also runs on iPad, Apple Watch, Mac and Apple TV.
Where do these alerts come from?
From the National Weather Service alert feed (api.weather.gov). NWS issues alerts by county and by forecast zone; this page lists every product that names Guam. Forecast Bar checks the feed continuously and this page refreshes within a few minutes of a change.
What is the difference between a watch, a warning and an advisory?
A warning means the hazard is occurring, imminent or very likely: act now. A watch means conditions are favourable for it to develop: prepare and stay informed. An advisory covers a hazard that is less serious than a warning but can still cause real inconvenience or danger if you are not ready for it.
Can I get this data as JSON?
Yes. /weather-alerts/gu/guam.json returns the active alerts, the last 30 days and the 12-month counts for Guam, refreshed every minute. Please cache responses and credit National Weather Service as the source.
Never find out about a Guam alert from this page again
Add Guam in Forecast Bar and every NWS warning, watch and advisory arrives as a push notification the moment it is issued, on iPhone, iPad, Apple Watch, Mac and Apple TV.
Free to download; live weather requires a subscription, and every subscription includes a 7-day free trial for new subscribers. Mac and iOS plans are separate; Apple TV is included with Forecast Bar Gold on iOS.