Live · updated 1 min ago
Guam weather alerts
No active National Weather Service alerts for Guam, Guam right now. The most recent was a Flood Advisory that ended Oct 19, 6:00 PM.
40 in the last 30 days 162 in 12 months (since Aug 30) most common: Flood 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.
- Push notifications for severe weather, with Critical Alerts that break through Focus modes
- Storm Tracker and Live Activities that follow a storm cell on your Lock Screen
- Radar with warnings drawn on the map, on iPhone, iPad, Apple Watch, Mac and Apple TV
- Rain alerts, air quality, tides, aurora and custom thresholds you set yourself
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 |
|---|---|---|---|
| Flood Advisory | Oct 19, 5:56 PM | Oct 19, 6:00 PM | Tiyan GU |
| Rip Current Statement | Oct 19, 3:55 PM | Oct 20, 4:00 AM | Tiyan GU |
| High Surf Advisory | Oct 19, 3:55 PM | Oct 20, 4:00 AM | Tiyan GU |
| Flood Advisory | Oct 19, 3:06 PM | Oct 19, 6:00 PM | Tiyan GU |
| Flood Advisory | Oct 19, 1:12 PM | Oct 19, 1:15 PM | Tiyan GU |
| Flood Advisory | Oct 19, 12:13 PM | Oct 19, 1:15 PM | Tiyan GU |
| Flood Advisory | Oct 19, 12:11 PM | Oct 19, 12:15 PM | Tiyan GU |
| Special Weather Statement | Oct 19, 12:03 PM | Oct 19, 12:30 PM | Tiyan GU |
| Flood Advisory | Oct 19, 9:19 AM | Oct 19, 12:15 PM | Tiyan GU |
| High Surf Advisory | Oct 19, 5:18 AM | Oct 19, 4:00 PM | Tiyan GU |
| Rip Current Statement | Oct 19, 5:18 AM | Oct 19, 4:00 PM | Tiyan GU |
| Wind Advisory | Oct 19, 3:47 AM | Oct 19, 4:00 AM | Tiyan GU |
| Flood Watch | Oct 19, 3:40 AM | Oct 19, 4:00 AM | Tiyan GU |
| Flood Advisory | Oct 18, 7:30 PM | Oct 18, 8:30 PM | Tiyan GU |
| Rip Current Statement | Oct 18, 7:07 PM | Oct 19, 4:00 PM | Tiyan GU |
| High Surf Advisory | Oct 18, 7:07 PM | Oct 19, 4:00 PM | Tiyan GU |
| Wind Advisory | Oct 18, 6:08 PM | Oct 19, 4:00 AM | Tiyan GU |
| High Surf Advisory | Oct 18, 5:53 PM | Oct 19, 4:00 AM | Tiyan GU |
| Rip Current Statement | Oct 18, 5:53 PM | Oct 19, 4:00 AM | Tiyan GU |
| Tropical Cyclone Local Statement | Oct 18, 5:51 PM | Oct 18, 8:00 PM | Tiyan GU |
| Flood Watch | Oct 18, 3:59 PM | Oct 19, 4:00 AM | Tiyan GU |
| Typhoon Warning | Oct 18, 3:01 PM | Oct 18, 11:15 PM | Tiyan GU |
| Typhoon Warning | Oct 18, 12:02 PM | Oct 18, 8:15 PM | Tiyan GU |
| Coastal Flood Warning | Oct 18, 12:00 PM | Oct 19, 4:00 AM | Tiyan GU |
| High Surf Warning | Oct 18, 12:00 PM | Oct 19, 4:00 AM | Tiyan GU |
| Typhoon Warning | Oct 18, 9:38 AM | Oct 18, 5:45 PM | Tiyan GU |
| Flood Advisory | Oct 18, 8:14 AM | Oct 18, 12:15 PM | Tiyan GU |
| High Surf Warning | Oct 18, 7:55 AM | Oct 19, 4:00 AM | Tiyan GU |
| Coastal Flood Warning | Oct 18, 7:55 AM | Oct 19, 4:00 AM | Tiyan GU |
| Flash Flood Warning | Oct 18, 5:29 AM | Oct 18, 7:30 AM | Tiyan GU |
| Typhoon Warning | Oct 18, 4:40 AM | Oct 18, 12:45 PM | Tiyan GU |
| Flood Watch | Oct 18, 4:12 AM | Oct 18, 6:00 PM | Tiyan GU |
| Extreme Wind Warning | Oct 18, 3:52 AM | Oct 18, 5:30 AM | Tiyan GU |
| Flash Flood Warning | Oct 18, 3:23 AM | Oct 18, 5:30 AM | Tiyan GU |
| Typhoon Warning | Oct 18, 3:01 AM | Oct 18, 3:15 PM | Tiyan GU |
| Flash Flood Warning | Oct 17, 9:23 PM | Oct 18, 3:30 AM | Tiyan GU |
| Typhoon Warning | Oct 17, 9:19 PM | Oct 18, 5:30 AM | Tiyan GU |
| Flash Flood Warning | Oct 17, 7:28 PM | Oct 18, 3:30 AM | Tiyan GU |
| High Surf Warning | Oct 17, 4:31 PM | Oct 19, 4:00 AM | Tiyan GU |
| Coastal Flood Warning | Oct 17, 4:31 PM | Oct 19, 4:00 AM | 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.
Minor flooding of streets, streams or low-lying areas is expected. Expect ponding on roads and use caution when driving.
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.
A heads-up about conditions that do not meet warning or advisory criteria but still deserve attention, such as a strong storm, patchy fog or a brief burst of snow.
Sustained winds of 30 mph or more, or gusts to 45 mph, are expected. Use caution driving high-profile vehicles.
Conditions are favourable for flooding. Have a plan in case a warning is issued.
Significant coastal flooding is occurring or imminent, typically at high tide. Move away from low-lying shoreline areas.
Very large, destructive breaking waves are expected. Stay away from the surf zone entirely.
Flash flooding is occurring or imminent. Move to higher ground; never drive into water covering a road.
Extreme sustained winds of a major hurricane (115 mph or more) are imminent or occurring within the next hour. Take shelter immediately in an interior room.
Significant coastal flooding is possible. Prepare to protect property near the shore.
Flooding may develop over the coming days as rain, snowmelt or river levels rise.
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. On iPhone and iPad, every subscription includes a 7-day free trial for new subscribers; Mac plans do not. Mac and iOS plans are separate; Apple TV is included with Forecast Bar Gold on iOS.