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Largest rivers in Hawaii by average flow

Active USGS stream gauges in Hawaii, ranked by average flow. The Hanalei River nr Hanalei, Kauai, HI gauge leads with 144 cfs.

Find gauges near you

RankNameAverage flow
1Hanalei River nr Hanalei, Kauai, HI144 cfs
2Wailuku River at Piihonua, HI117 cfs
3Wainiha River nr Hanalei, Kauai, HI85.7 cfs
4SF Wailua River nr Lihue, Kauai, HI70.3 cfs
5Honolii Stream nr Papaikou, HI53.0 cfs
6Waihee Rv abv Waihee Dtch intk nr Waihee, Maui, HI50.6 cfs
7Waimea River near Waimea, Kauai, HI49.1 cfs
8Wailuku River at Kepaniwai Park, Maui, HI42.1 cfs
9Kaukonahua Str at Waialua, Oahu, HI38.1 cfs
10Kaukonahua Stream blw Wahiawa Reservoir, Oahu, HI35.8 cfs
11EB of NF Wailua River nr Lihue, Kauai, HI33.8 cfs
12Waiahole Stream above Kamehameha Hwy, Oahu, HI32.2 cfs
13Waiahi Str US Upper Powerhouse, Kauai, HI27.5 cfs
14Wailuku River at Iao Valley Road, Maui, HI26.6 cfs
15Waikele Str at Waipahu, Oahu, HI24.6 cfs
16Kahana Str at alt 30 ft nr Kahana, Oahu, HI24.5 cfs
17Honokohau Stream near Honokohau, Maui, HI24.2 cfs
18Nailiilihaele Stream near Huelo, Maui, HI21.5 cfs
19Punaluu Str abv Punaluu Ditch Intake, Oahu, HI20.0 cfs
20Puohokamoa Str ab Spreckels Ditch, Maui, HI17.1 cfs
21Kawaikoi Stream nr Waimea, Kauai, HI15.5 cfs
22Halawa Stream near Halawa, Molokai, HI14.9 cfs
23Oheo Gulch at dam near Kipahulu, Maui, HI14.7 cfs
24West Wailuaiki Stream near Keanae, Maui, HI13.6 cfs
25Kaneohe Str blw Kamehameha Hwy, Oahu, HI13.2 cfs
26Waikolu Str blw pipe nr Kalaupapa, Molokai, HI11.4 cfs
27SF Kaukonahua Str at E pump, nr Wahiawa, Oahu, HI10.3 cfs
28Hanawi Stream near Nahiku, Maui, HI9.3 cfs
28Kahakuloa Stream near Honokohau, Maui, HI9.3 cfs
30Kauaula Stream US of ditch diversion, Maui, HI8.8 cfs
Average flowHanalei River nr Hanale…144 cfsWailuku River at Piihon…117 cfsWainiha River nr Hanale…85.7 cfsSF Wailua River nr Lihu…70.3 cfsHonolii Stream nr Papai…53.0 cfsWaihee Rv abv Waihee Dt…50.6 cfsWaimea River near Waime…49.1 cfsWailuku River at Kepani…42.1 cfsKaukonahua Str at Waial…38.1 cfsKaukonahua Stream blw W…35.8 cfsEB of NF Wailua River n…33.8 cfsWaiahole Stream above K…32.2 cfsWaiahi Str US Upper Pow…27.5 cfsWailuku River at Iao Va…26.6 cfsWaikele Str at Waipahu,…24.6 cfs
Average flow

How the Average flow figures spread in Hawaii

  • The ranking covers the 81 gauges in Hawaii that have a recorded average flow in this dataset.
  • The highest is Hanalei River nr Hanalei, Kauai, HI at 144 cfs; the lowest is Paauau Gulch at Pahala, HI at 0.0 cfs.
  • The median average flow is 5.9 cfs.
  • The gap between #1 Hanalei River nr Hanalei, Kauai, HI and #2 Wailuku River at Piihonua, HI is 27.0 cfs.
  • The page table lists the top 30.

Data: U.S. Geological Survey (USGS) (public domain, U.S. federal data).· Updated 2026-11-02 · Text generated from the data and checked against it.

Live values are provisional USGS data. Measurements only, not a safety assessment — for flood warnings see the National Weather Service.

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