High Surf Advisory
Coastal Hazard Message
National Weather Service Tiyan GU
332 AM ChST Sat Jan 31 2026
GUZ001-MPZ001>003-310745-
/O.CON.PGUM.SU.Y.0012.260131T0600Z-260202T0600Z/
/O.CON.PGUM.RP.S.0004.260131T0600Z-260202T0600Z/
Guam-Rota-Tinian-Saipan-
332 AM ChST Sat Jan 31 2026
...HIGH SURF ADVISORY REMAINS IN EFFECT FROM 4 PM THIS AFTERNOON
TO 4 PM CHST MONDAY...
...HIGH RIP CURRENT RISK REMAINS IN EFFECT FROM THIS AFTERNOON
THROUGH MONDAY AFTERNOON...
* WHAT...Large breaking waves of 8 to 11 feet and dangerous rip
currents.
* WHERE...High Surf for north facing reefs of the Marianas. High
Risk of Rip Currents for north and east facing reefs.
* WHEN...From 4 PM this afternoon to 4 PM ChST Monday.
* 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...Surf is already elevated due to a complex
mixture of swells moving through the region, generated by distant
systems. As a shear line descends into the islands and a pulse of
northerly swell moves into the region, hazardous surf around
9 feet for north facing reefs and dangerous rip currents along
north and east facing reefs are expected to develop. Surf is
expected to peak around 11 feet Sunday before slowly decreasing
Sunday night and Monday as the shear line weakens and the
northerly swell diminishes.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Rip currents will be life threatening. Inexperienced swimmers
should remain out of the water due to dangerous surf conditions.
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.
&&
$$
Williams
Small Craft Advisory
URGENT - MARINE WEATHER MESSAGE
National Weather Service Tiyan GU
400 AM ChST Sat Jan 31 2026
PMZ153-154-310800-
/O.CON.PGUM.SC.Y.0011.260131T0600Z-260202T2000Z/
Tinian Coastal Waters-Saipan Coastal Waters-
400 AM ChST Sat Jan 31 2026
...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 4 PM THIS
AFTERNOON TO 6 AM CHST TUESDAY...
* WHAT...Northeast winds 15 to 25 kt with gusts up to 30 kt and
seas 8 to 11 feet expected.
* WHERE...Tinian and Saipan Coastal Waters.
* WHEN...From 4 PM this afternoon to 6 AM ChST Tuesday.
* IMPACTS...Conditions will be hazardous to small craft.
* ADDITIONAL DETAILS...Hazardous marine conditions will first
develop across Tinian and Saipan as a shear line descends
southward increasing winds to around 22 kt, with seas also
building to around 10 feet response to increased winds and an
incoming northerly swell. These conditions are expected to extend
southward into Rota and Guam around Sunday. Current guidance
suggest these conditions will improve Tuesday as the shear line
weakens and the northerly swell diminishes.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Inexperienced mariners, especially those operating smaller
vessels, should avoid boating in hazardous conditions.
&&
$$
Williams
Rip Current Statement
Coastal Hazard Message
National Weather Service Tiyan GU
332 AM ChST Sat Jan 31 2026
GUZ001-MPZ001>003-310745-
/O.CON.PGUM.SU.Y.0012.260131T0600Z-260202T0600Z/
/O.CON.PGUM.RP.S.0004.260131T0600Z-260202T0600Z/
Guam-Rota-Tinian-Saipan-
332 AM ChST Sat Jan 31 2026
...HIGH SURF ADVISORY REMAINS IN EFFECT FROM 4 PM THIS AFTERNOON
TO 4 PM CHST MONDAY...
...HIGH RIP CURRENT RISK REMAINS IN EFFECT FROM THIS AFTERNOON
THROUGH MONDAY AFTERNOON...
* WHAT...Large breaking waves of 8 to 11 feet and dangerous rip
currents.
* WHERE...High Surf for north facing reefs of the Marianas. High
Risk of Rip Currents for north and east facing reefs.
* WHEN...From 4 PM this afternoon to 4 PM ChST Monday.
* 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...Surf is already elevated due to a complex
mixture of swells moving through the region, generated by distant
systems. As a shear line descends into the islands and a pulse of
northerly swell moves into the region, hazardous surf around
9 feet for north facing reefs and dangerous rip currents along
north and east facing reefs are expected to develop. Surf is
expected to peak around 11 feet Sunday before slowly decreasing
Sunday night and Monday as the shear line weakens and the
northerly swell diminishes.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Rip currents will be life threatening. Inexperienced swimmers
should remain out of the water due to dangerous surf conditions.
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.
&&
$$
Williams
