Weather Warnings for Guam

Issued by the National Weather Service

Current watches, warnings, and advisories for Guam
Alerts Updated: August 9, 2026, 7:16 am  UTC


High Surf Advisory issued August 9 at 3:36PM ChST until August 13 at 4:00PM ChST by NWS Tiyan GU

Summary: * WHAT...Large breaking waves of 9 to 11 feet and dangerous rip currents expected. * WHERE...Along west and north facing reefs. * WHEN...Until 4 PM ChST Thursday. * IMPACTS...Dangerous swimming and surfing conditions and localized beach erosion. Rip currents can sweep even the best swimmers away from shore into deeper water. * ADDITIONAL DETAILS...A strong monsoon pattern continues to produce hazardous surf and a high risk of rip currents along west and north facing reefs. The High Surf Advisory and High Rip Current Risk may be extended again next week as the monsoon pattern, and associated west to northwest swells, continue.
Severity:  Minor    Effective:  August 9, 2026, 3:36 pm      Expires:  August 10, 2026, 6:00 am
Area:  Guam; Rota; Tinian; Saipan


Rip Current Statement issued August 9 at 3:36PM ChST until August 13 at 4:00PM ChST by NWS Tiyan GU

Summary: * WHAT...Large breaking waves of 9 to 11 feet and dangerous rip currents expected. * WHERE...Along west and north facing reefs. * WHEN...Until 4 PM ChST Thursday. * IMPACTS...Dangerous swimming and surfing conditions and localized beach erosion. Rip currents can sweep even the best swimmers away from shore into deeper water. * ADDITIONAL DETAILS...A strong monsoon pattern continues to produce hazardous surf and a high risk of rip currents along west and north facing reefs. The High Surf Advisory and High Rip Current Risk may be extended again next week as the monsoon pattern, and associated west to northwest swells, continue.
Severity:  Moderate    Effective:  August 9, 2026, 3:36 pm      Expires:  August 10, 2026, 6:00 am
Area:  Guam; Rota; Tinian; Saipan