Pacific Islands Water Science Center
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Recent hydrologic conditions, HawaiiA summary of recent rainfall, streamflow, and groundwater conditions in Hawaii is provided below. These web pages are prepared in collaboration with the Hawaii State Commission on Water Resource Management and the County Water Departments and provide water-resource managers, scientists, and the public with timely information on the status and trends of hydrologic conditions in Hawaii.
Kauai--Average rainfall. During June - August 2015, rainfall was about 102 percent of average. As of August 2015, rainfall near the summit of Mt. Waialeale on Kauai was below average 10 of the last 12 months. During September 2014 - August 2015, rainfall was about 75 percent of average.
Oahu--Above-average rainfall. During June - August 2015, rainfall was about 124 percent of average. As of August 2015, rainfall at Poamoho, near the crest of the Koolau Range on Oahu, was below average 8 of the last 12 months. During September 2014 - August 2015, rainfall was about 89 percent of average.
Maui--equipment malfunction. Rainfall data at Puu Kukui, the summit of the West Maui Mountains are not available due to equipment malfunction during May to August.
Links to USGS WaterWatch for current streamflow conditions in Hawaii. Links open in a new browser window.
Information from the USGS on groundwater and drought.
Links to USGS Groundwater Watch for current water-level conditions in Hawaii. Links open in a new browser window.
Water level network map-- shows recent groundwater levels compared to historical monthly mean groundwater levels. A list of wells in the network and links to available data and statistics are provided below by County
In addition to the USGS streamflow, groundwater level, and rainfall data for the sites shown above, the National Weather Service, Weather Forecast Office in Honolulu provides rainfall hydrology data and graphics for Hawaii.