Wailuku River Flow Today
As of October 29, 2026 at 8:50 PM, the Wailuku River is flowing at 1,590 cfs at Piihonoua, HI — 492% of normal for the date. ❤ Favorite
Wailuku River map
See the Wailuku River on a live map
Every gauge, dam and paddle run on the river, one tap each:
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Wailuku River conditions today
Where the river is running versus normal, what’s rising or dropping, and what it means for a trip — built from the live USGS readings below.
At Piihonoua, the Wailuku River is running 1,590 cfs — 492% of normal. Along the river, 1 of 1 reporting gauges are above normal (the typical gauge is at 492% of normal).
How the Wailuku River compares to normal
Every reporting gauge from the top of the river to the bottom: bar length is today’s flow, colour is percent of normal for the date.
Flow along the river, upstream to downstream
- Piihonoua1,084 ft 1,590 cfs492%
Bar length uses a square-root scale so small headwater flows stay visible next to big downstream ones. Colour: <50% 50–90 90–110 110–150 150%+ of normal.
Where every gauge sits
One dot per Wailuku River streamgauge, placed by its own percent of normal. The line is the typical gauge (492%).
Wailuku River flow report
| Streamgage | Streamflow | % of normal | 24h | Gage height | To flood stage | Elevation |
|---|---|---|---|---|---|---|
|
Wailuku River At Piihonoua HI
Oct 29, 8:50 PM · USGS 16704000 |
1,590 cfs | 492% | · | 8.20 ft | 9.8 ft below | 1,084 ft |
USGS provisional data. Readings are in each gauge’s local time; gauges silent for more than 3 days are marked “Last reported”. Tap any gauge for its hydrograph, forecast and history.
Wailuku River streamflow over time
Daily total flow across every monitored gauge on the river (this total last updated earlier; the live gauge readings above are current).
Wailuku River
The Wailuku River is a 12.3-mile-long river located on the island of Hawaii. The river has a rich history and is home to several cultural landmarks. The hydrology of the river is affected by the Wailuku Reservoir, which is the primary source of water for the population of Hilo. The river also has several dams, including the Pepeekeo, Waihole, and Nīnole Dams. The Wailuku River is used for both recreational and agricultural purposes. It is a popular destination for kayaking, fishing, and hiking. The river also provides irrigation for crops such as sugarcane and taro, which are important to the local economy.
About the Wailuku River
How is the Wailuku River flowing right now?
As of October 29, 2026, the Wailuku River is flowing at 1,590 cfs at Piihonoua, HI, about 492% of normal for the date. Every gauge’s live reading is in the table above.
Is the Wailuku River running high or low?
The typical gauge on the Wailuku River is at 492% of normal for the date. Above 100% means higher than the historical average for this calendar day; below 100% means lower. The profile above shows which reaches are high or low.
What is flood stage on the Wailuku River?
The National Weather Service sets flood stages for Piihonoua (18.0 ft). The table shows how far each gauge is below its flood stage right now.
Where does the data come from?
Discharge and gage height are from the USGS National Water Information System; flood stages from the National Weather Service. The history chart sums every monitored gauge on the river.
Can I get alerts for a gauge?
Yes — open any gauge from the table, favorite it in the Snoflo app and set a flow threshold.