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Wahiawa Reservoir at Spillway at Wahiawa, Oahu water level

Reservoir, Wahiawa Reservoir, Hawaii, United States

Directions

Very low for mid-October

Water level

53.45ft Down 0.28 ft over the last 24 hours

50 60 70 80 Minor floodstage 84.00 ft

History

607080ftOct 10Oct 11Oct 13Oct 15Oct 16Minor flood stage607080ftOct 10Oct 13Oct 16Minor flood stage
6080ftSep 17Sep 24Oct 1Oct 9Oct 16Minor flood stage6080ftSep 17Oct 1Oct 16Minor flood stage
6080ftOct 2025Jan 2026Apr 2026Jul 2026Oct 2026Minor flood stage6080ftOct 2025Apr 2026Oct 2026Minor flood stage
6080ftOct 2020Apr 2022Oct 2023Apr 2025Oct 2026Minor flood stage6080ftOct 2020Oct 2023Oct 2026Minor flood stage
6080ftJanMarMayJulSepNov20266080ftJanAprJulOct2026

202120222023202420252026

Water level Normal range (10–90 %) Minor flood stage

What this means

Water is short at Wahiawa Reservoir at Spillway at Wahiawa, Oahu: the latest reading of 53.45 ft is far below normal for mid-October.

It is 30.55 ft below the flood stage of 84.00 ft. That puts it 9.83 ft below the median of 63.28 ft for mid-October, based on 7 years of readings. A year ago it stood at 58.75 ft (−5.30 ft).

It is still going down, by 0.28 ft over the past 24 hours. With the water still dropping, the shoreline keeps moving out. The 30-day range is 46.03 ft – 65.85 ft.

Many reservoirs reach their low point of the year in fall, before winter rain and snow start the refill.

Compared with 7 years of daily readings for this time of year. How to read levels

Key numbers

Median for this date
63.28 ft9.83 ft below the median for this date
Normal for this date
58.35 ft – 66.91 ft8 years in 10 fall in this range (7 years of records)
Same day last year
58.75 ft−5.30 ft
Lowest and highest in 30 days
46.03 ft – 65.85 ft
Lowest and highest in 12 months
45.91 ft – 82.96 ft

Boating and fishing at Wahiawa Reservoir at Spillway at Wahiawa, Oahu

At low levels, launching can mean a long walk or a closed ramp, and shallow points stick out further than charts suggest.

Conditions at the shore change with the level, so check with the agency that runs the lake before a trip.

What happens at each level

84.00 ft
Kaukonahua Stream will overflow at Otake Camp in Waialua.
53.45 ft
Right now

Impact statements from the U.S. National Weather Service.

Weather at the gauge

The forecast is not available right now.

Sunrise 06:29 AM Sunset 06:08 PM Daylight 11h 39m First quarter 34 %

Map

Nearby gauges

Gauge Level Compared with normal 24 hours Distance
Kaukonahua Stream below Wahiawa Reservoir, OahuRiver gauge, Kaukonahua Stream 32.9 cfs Normal 0.3 mi
Wahiawa Ditch at Wahiawa, OahuCanal gauge, Wahiawa Ditch 8.7 cfs Normal 0.3 mi
Upper Helemano Reservoir near Wahiawa, OahuReservoir, Upper Helemano Reservoir 43.01 ft Very high −0.24 ft 2.5 mi
SF Kaukonahua Str at E pump, near Wahiawa, OahuRiver gauge, SF Kaukonahua Str 1.53 ft Below flood stage 3.5 mi
Helemano 6 Reservoir, OahuReservoir 22.63 ft Normal −0.12 ft 4.0 mi
Ku Tree Reservoir near Wahiawa, OahuReservoir, Ku Tree Reservoir 17.19 ft Low 0.00 ft 4.4 mi
Koolau Reservoir near Wahiawa, OahuReservoir, Koolau Reservoir 6.14 ft High −0.02 ft 5.1 mi
Kemoo 5 Reservoir, OahuReservoir 14.55 ft Normal 0.00 ft 5.4 mi

Questions and answers

How does Wahiawa Reservoir at Spillway at Wahiawa, Oahu compare with last year?

It is 5.30 ft lower than on the same day last year, when the reading was 58.75 ft.

How often is Wahiawa Reservoir at Spillway at Wahiawa, Oahu updated?

Several times an hour. New readings from U.S. Geological Survey appear here as they arrive. Latest: Oct 16, 2026, 11:35 AM HST.

What is the water level of Wahiawa Reservoir at Spillway at Wahiawa, Oahu today?

On Oct 16, 2026, 11:35 AM HST, the water level was 53.45 ft. Down 0.28 ft over the last 24 hours.

Is Wahiawa Reservoir at Spillway at Wahiawa, Oahu rising or falling?

Down 0.28 ft over the last 24 hours. Up 1.16 ft over the last 7 days.

Is the level of Wahiawa Reservoir at Spillway at Wahiawa, Oahu normal?

Very low for mid-October. Compared with 7 years of daily readings for this time of year.

How often is this data updated?

U.S. Geological Survey publishes a new reading every 15 minutes. This page refreshes within minutes of each update.

Where does this data come from?

The values come directly from U.S. Geological Survey, the official operator of this gauge, and are published under the Public domain. We do not estimate or model live values.

For specialists

Station codes, datum, parameters, data quality and downloads
Operator
U.S. Geological Survey
Station code
usgs:16210000 (Agency page)
Coordinates
21.49647, -158.04978 (WGS84)
Vertical datum
LMSL
Update interval
every 15 minutes
Licence
Public domain. Data: U.S. Geological Survey (USGS), provisional data subject to revision

Published series

ParameterLast valueTime (UTC)Quality
Water level stage 53.45 ft 2026-10-16 21:35 Provisional

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How to cite

U.S. Geological Survey: Wahiawa Reservoir at Spillway at Wahiawa, Oahu (usgs:16210000). Accessed October 16, 2026 via Nivelmap, https://nivelmap.com/en/united-states/hawaii/wahiawa-reservoir-at-spillway-at-wahiawa-oahu

How we check values

Each reading is stored as published. We hold back values that jump faster than physically plausible and show the measurement time with every value.

Readings are provisional, can be delayed or wrong and are not a flood warning. Read the disclaimer