Headline:
High Surf Warning issued April 18 at 4:03AM ChST until April 18 at 10:00AM ChST by NWS Tiyan GU
Event:
High Surf Warning
Urgency:
Expected
Effective:
April 17, 2026 - 11:03am
Expires:
April 18, 2026 - 1:15am
Description:
* WHAT...For the High Surf Warning, dangerously large breaking
waves of 11 to 15 feet. For the Coastal Flood Advisory, minor
coastal flooding of 1 to 2 feet. For the High Surf Advisory,
large breaking waves of 10 to 14 feet expected. For the High Rip
Current Risk, dangerous rip currents.
* WHERE...South, west and north facing reefs and shorelines of
Guam and Rota.
* WHEN...For the High Surf Warning, until 10 AM ChST this morning.
For the Coastal Flood Advisory, until 5 PM ChST today. For the
High Surf Advisory, from 10 AM this morning to 5 PM ChST Sunday.
For the High Rip Current Risk, through Sunday afternoon.
* IMPACTS...Flooding of lots, parks, and roads with only isolated
road closures expected. Breaking waves can sweep people off
jetties and docks, and into dangerous seas. Life-threatening
swimming conditions and significant beach erosion can be
expected. Rip currents can sweep even the best swimmers away from
shore into deeper water.
* ADDITIONAL DETAILS...As TY Sinlaku continues to move away, the
primary swell and highest surf will be northwest. Seas will be
slow to subside over the next couple of days. Surf heights of
12 to 16 feet are expected for Guam and Rota.
Instruction:
Everyone should remain out of the water due to life-threatening
surf conditions. Stay off of jetties, piers, and other waterside
infrastructure.
Rip currents will be life threatening. If caught in a rip
current, relax and float. Don't swim against the current. If
able, swim in a direction following the shoreline. If unable to
escape, face the shore and call or wave for help.
Area Description:
Guam; Rota
Forcast Office:
NWS Tiyan GU
Sender: