The PacIOOS Wave Run-Up Forecast is a tool to predict the potential occurrence of high sea levels and wave inundation impacting the shorelines of Waikīkī. Storm events, high waves, extreme tides, or a combination of these factors can lead to potential inundation.

The tool was developed to increase community resilience and enhance preparedness by providing decision-makers, agency representatives, hospitality industry, and community members with time to plan in advance of potential flooding events. The forecast is updated hourly (about 15 minutes after the hour) and dates and times are shown in local time.

The PacIOOS Wave Run-Up Forecast does not serve as a warning system. In case of a possible inundation event, please consult with local authorities and emergency responders to seek further information and direction. A similar forecast is also available for Oʻahu’s North Shore.