Wailuku River at Piihonua, HI
USGS Site No: 16704000 • Wailuku River • Hawaii County, HI
Wailuku River at Piihonua, HI on the Wailuku River is currently at 124 cfs (Normal — 64th percentile for this date) . Gage height: 3.27 ft.
Reading from
Historical Percentile Comparison
Today's discharge compared to the long-term record for October 27 at this station. Percentile rank shows what fraction of historical years had lower flow on this date.
| Percentile | Label | CFS Threshold | Today's Flow |
|---|---|---|---|
| 10th | Very Low threshold | 15 | |
| 25th | Low threshold | 31 | |
| 50th (Median) | Normal (median) | 65 | |
| 75th | High threshold | 172 | Today: 124 cfs |
| 95th | Very High threshold | 947 |
30-Day Hydrograph
Recent discharge plotted against the historical 10th–95th percentile envelope for the same calendar days. Source: USGS daily values + long-term statistics.
30-Day Flow History
| Date | Discharge (CFS) | Gage Ht (ft) |
|---|---|---|
| May 28, 2026 | 152 | — |
| May 27, 2026 | 193 | — |
| May 26, 2026 | 247 | — |
| May 25, 2026 | 405 | — |
| May 24, 2026 | 264 | — |
| May 23, 2026 | 451 | — |
| May 22, 2026 | 452 | — |
| May 21, 2026 | 965 | — |
| May 20, 2026 | 543 | — |
| May 19, 2026 | 343 | — |
| May 18, 2026 | 1,170 | — |
| May 17, 2026 | 171 | — |
| May 16, 2026 | 217 | — |
| May 15, 2026 | 438 | — |
| Apr 20, 2026 | 24 | — |
| Apr 19, 2026 | 24 | — |
| Apr 18, 2026 | 23 | — |
| Apr 17, 2026 | 25 | — |
| Apr 16, 2026 | 26 | — |
| Apr 15, 2026 | 28 | — |
| Apr 14, 2026 | 30 | — |
| Apr 13, 2026 | 34 | — |
| Apr 12, 2026 | 36 | — |
| Apr 11, 2026 | 42 | — |
| Apr 10, 2026 | 41 | — |
| Apr 9, 2026 | 39 | — |
| Apr 8, 2026 | 52 | — |
| Apr 7, 2026 | 50 | — |
| Apr 6, 2026 | 33 | — |
| Apr 5, 2026 | 36 | — |
Station Information
- USGS Site No
- 16704000
- State
- HI
- County
- Hawaii County
- Coordinates
- 19.7121, -155.1508
- Drainage Area
- 220 mi²
- Datum (ft)
- 1,090.0
- HUC Code
- 20010000
Flood Stage Thresholds
- Flood Stage
- 20.0 ft
- Major Flood
- 24.4 ft
Currently 16.73 ft below flood stage.
Recent Extremes
- Max discharge
-
4,450 cfsJan 5, 2026
- Min discharge
-
3 cfsOct 15, 2025
- Days at flood stage
- 0
Computed from the local daily-values archive.
Nearby Gauges
-
Honolii Stream near Papaikou, HINormal3.6 mi · 84 cfs
-
Wailuku River near Kaumana, HINormal7.5 mi · 3 cfs
-
Hakalau Stream near Alt 1300 Ft, HIVery High11.1 mi · 20 cfs
-
Manowaiopae Stream Near Spencer Road, HIVery High18.9 mi · 7 cfs
-
Waikoloa Str at Marine Dam near Kamuela, HIHigh40.5 mi · 8 cfs