Severe · Coastal Flood WarningActive alert

Coastal Flood Warning issued October 18 at 12:00PM ChST until October 19

Affecting Guam; Rota

In effect until: Oct 18, 2026, 4:00 PM

Guam; Rota

Likely impact; effects through 4:00 PM.

Everyone should remain out of the water due to life-threatening surf conditions. Stay off of jetties, piers, and other waterside infrastructure.

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* WHAT...For the Coastal Flood Warning, significant coastal flooding.
For the High Surf Warning, dangerously large breaking waves of 18
to 24 feet in the surf zone.

* WHERE...Guam and Rota.

* WHEN...Until 4 AM ChST Monday.

* IMPACTS...Low lying property including homes, businesses, and some
critical infrastructure may still be inundated. Some shoreline
erosion will occur. Breaking waves can sweep people off jetties and
docks, and into dangerous seas. Life-threatening swimming
conditions and significant beach erosion can be expected.

* ADDITIONAL DETAILS...South to southeast swells and elevated wind
waves induced by Super Typhoon Champi to the west-southwest will
continue life-threatening surf and significant coastal flooding at
least through early Monday morning.

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Alert data: U.S. National Weather Service / NOAA · Translation: WeatherTranslate™

Coastal Flood Warning issued October 18 at 12:00PM ChST until October 19

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