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--Below-average rainfall. During October - December 2014, rainfall was about 65 percent of average. As of December 2014, rainfall near the summit of Mt. Waialeale on Kauai was below average 11 of the last 12 months. During January - December 2014, rainfall was about 70 percent of average. This was the lowest calendar year rainfall total since 1993 and the fourth lowest yearly total ever recorded.
Oahu--Average rainfall. During October - December 2014, rainfall was about 95 percent of average. As of December 2014, rainfall at Poamoho, near the crest of the Koolau Range on Oahu, was above average 6 of the last 12 months. During January - December 2014, rainfall was about 112 percent of average.
Maui--Below-average rainfall. October - December 2014, rainfall was about 60 percent of average. Rainfall data are missing for part of August and September due to equipment malfunction. As of December 2014, rainfall at Puu Kukui, the summit of the West Maui Mountains was below average 8 of the last 10 months with complete rainfall records. Two months of rainfall data are missing during the previous year due to equipment malfunction.
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.