Top Discharges

Streamgauges reporting the most discharge on the Wailuku River

10 Day Trend

Discharge comparison for the highest gauges over the past 10 days

Expected Streamflow Ranges

Streamflow discharge range for this time of year

The Wailuku River is a 28.0-mile-long (45.1 km) water course on the Island of Hawaiʻi in the Hawaiian Islands. It is the longest river in Hawai'i and its course lies mostly along the divide between the lava flows of Mauna Kea and those of Mauna Loa to the south. It arises at about the 10,800 feet (3,300 m) elevation along the eastern slope of Mauna Kea (19°48′26″N 155°25′13″W). It flows generally eastward, descending steeply from the mountain and entering the Pacific Ocean at Hilo.Wailuku River State Park is located along the lower reach of the river. One section of the ... Source: Wikipedia