Weather Warnings for Marianas

Issued by the National Weather Service

Current watches, warnings, and advisories for Commonwealth of the Northern Marianas
Alerts Updated: April 18, 2026, 7:28 am  UTC


Coastal Flood Advisory issued April 18 at 5:28PM ChST until April 19 at 11:00AM ChST by NWS Tiyan GU

Summary: Updated expiration times. ...HIGH SURF ADVISORY NOW IN EFFECT UNTIL 5 AM CHST MONDAY... ...HIGH RIP CURRENT RISK NOW IN EFFECT THROUGH LATE SUNDAY NIGHT... ...COASTAL FLOOD ADVISORY REMAINS IN EFFECT UNTIL 11 AM CHST SUNDAY... * WHAT...Large breaking waves of 10 to 14 feet and dangerous rip currents. Minor coastal flooding of 1 to 2 feet expected. * WHERE...South, west, and north facing reefs and shorelines of Tinian and Saipan. * WHEN...For the Coastal Flood Advisory, until 11 AM ChST Sunday. For the High Surf Advisory and High Rip Current Risk, until 5 AM ChST Monday. * IMPACTS...Flooding of lots, parks, and roads with only isolated road closures expected. 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...As Typhoon Sinlaku continues to move away, the primary swell and highest surf will be northwest. Seas and surf will be slow to subside over the next couple of days.
Severity:  Minor    Effective:  April 18, 2026, 5:28 pm      Expires:  April 19, 2026, 7:00 am
Area:  Tinian; Saipan


Rip Current Statement issued April 18 at 5:28PM ChST until April 20 at 5:00AM ChST by NWS Tiyan GU

Summary: Updated expiration times. ...HIGH SURF ADVISORY NOW IN EFFECT UNTIL 5 AM CHST MONDAY... ...HIGH RIP CURRENT RISK NOW IN EFFECT THROUGH LATE SUNDAY NIGHT... * WHAT...Large breaking waves of 9 to 14 feet and dangerous rip currents. * WHERE...South, west and north facing reefs of Guam and Rota. * WHEN...Until 5 AM 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...As Typhoon Sinlaku continues to move away, the primary swell and highest surf will be northwest. Seas and surf will be slow to subside over the next couple of days.
Severity:  Moderate    Effective:  April 18, 2026, 5:28 pm      Expires:  April 19, 2026, 7:00 am
Area:  Guam; Rota


High Surf Advisory issued April 18 at 5:28PM ChST until April 20 at 5:00AM ChST by NWS Tiyan GU

Summary: Updated expiration times. ...HIGH SURF ADVISORY NOW IN EFFECT UNTIL 5 AM CHST MONDAY... ...HIGH RIP CURRENT RISK NOW IN EFFECT THROUGH LATE SUNDAY NIGHT... ...COASTAL FLOOD ADVISORY REMAINS IN EFFECT UNTIL 11 AM CHST SUNDAY... * WHAT...Large breaking waves of 10 to 14 feet and dangerous rip currents. Minor coastal flooding of 1 to 2 feet expected. * WHERE...South, west, and north facing reefs and shorelines of Tinian and Saipan. * WHEN...For the Coastal Flood Advisory, until 11 AM ChST Sunday. For the High Surf Advisory and High Rip Current Risk, until 5 AM ChST Monday. * IMPACTS...Flooding of lots, parks, and roads with only isolated road closures expected. 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...As Typhoon Sinlaku continues to move away, the primary swell and highest surf will be northwest. Seas and surf will be slow to subside over the next couple of days.
Severity:  Minor    Effective:  April 18, 2026, 5:28 pm      Expires:  April 19, 2026, 7:00 am
Area:  Tinian; Saipan


High Surf Advisory issued April 18 at 5:28PM ChST until April 20 at 5:00AM ChST by NWS Tiyan GU

Summary: Updated expiration times. ...HIGH SURF ADVISORY NOW IN EFFECT UNTIL 5 AM CHST MONDAY... ...HIGH RIP CURRENT RISK NOW IN EFFECT THROUGH LATE SUNDAY NIGHT... * WHAT...Large breaking waves of 9 to 14 feet and dangerous rip currents. * WHERE...South, west and north facing reefs of Guam and Rota. * WHEN...Until 5 AM 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...As Typhoon Sinlaku continues to move away, the primary swell and highest surf will be northwest. Seas and surf will be slow to subside over the next couple of days.
Severity:  Minor    Effective:  April 18, 2026, 5:28 pm      Expires:  April 19, 2026, 7:00 am
Area:  Guam; Rota


Rip Current Statement issued April 18 at 5:28PM ChST until April 20 at 5:00AM ChST by NWS Tiyan GU

Summary: Updated expiration times. ...HIGH SURF ADVISORY NOW IN EFFECT UNTIL 5 AM CHST MONDAY... ...HIGH RIP CURRENT RISK NOW IN EFFECT THROUGH LATE SUNDAY NIGHT... ...COASTAL FLOOD ADVISORY REMAINS IN EFFECT UNTIL 11 AM CHST SUNDAY... * WHAT...Large breaking waves of 10 to 14 feet and dangerous rip currents. Minor coastal flooding of 1 to 2 feet expected. * WHERE...South, west, and north facing reefs and shorelines of Tinian and Saipan. * WHEN...For the Coastal Flood Advisory, until 11 AM ChST Sunday. For the High Surf Advisory and High Rip Current Risk, until 5 AM ChST Monday. * IMPACTS...Flooding of lots, parks, and roads with only isolated road closures expected. 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...As Typhoon Sinlaku continues to move away, the primary swell and highest surf will be northwest. Seas and surf will be slow to subside over the next couple of days.
Severity:  Moderate    Effective:  April 18, 2026, 5:28 pm      Expires:  April 19, 2026, 7:00 am
Area:  Tinian; Saipan