HAWAII FLOW REPORT

Last Updated: March 14, 2026

Hawaii's river systems are exhibiting a diverse range of streamflow conditions, with some regions facing significant departures from normal flow levels. For water enthusiasts and experts monitoring seasonal trends, the report highlights areas of concern such as the Oheo Gulch at Dam near Kipahulu, which has seen an astonishing 94.7% decrease from its normal flow, currently at 4510 cubic feet per second (cfs). This, coupled with a drastic 24-hour change of 45000 cfs, could indicate severe flow drought conditions. Contrastingly, the Manoa-Palolo Drainage Canal at Moiliili is flowing at an unprecedented 587.35% of its typical rate, with a current streamflow of 541 cfs, which could raise flooding concerns in the Honolulu area, affecting urban waterways and potentially impacting local communities.

Whitewater trail locations such as the Waimea River near Waimea are also experiencing elevated streamflows at 1740 cfs, which is 324.15% above the norm, suggesting excellent conditions for enthusiasts seeking higher water levels for recreation. However, caution is advised due to the potential for sudden changes in water levels. Similarly, Hanalei River near Hanalei, known for its scenic paddling routes, is flowing at 288.94% of its normal rate with a gage height of 1.06 feet, indicating heightened conditions that may alter the difficulty and safety of these water trails. While some rivers like the Waialae Stream and Kawaikoi Stream are experiencing above-normal flows, others like the Hanawi Stream near Nahiku are below normal, which demonstrates the variability across the Hawaiian islands' watersheds. River users and communities near these waterways should remain vigilant and informed about the latest streamflow conditions, as fluctuations could impact accessibility, safety, and the health of the aquatic ecosystems.