HawaiiReservoir
Wahiawa Reservoir (Lake Wilson) water level
Current level
52.27ft (gage datum)
Reading from Oct 25, 2026
Well below normal for October
- Past 24 hours
- -1.20ft
- Past 7 days
- -2.54ft
- Past 30 days
- -2.33ft
- vs typical October
- -16.12ft
Wahiawa Reservoir (Lake Wilson) was at 52.27 ft on the gage on October 25, falling 2.54 ft over the past week. That is well below normal for October: the typical October level is 68.39 ft, so the lake is 16.12 ft below its usual mark.
Last 30 days
Shaded band shows the lowest and highest October monthly averages on record. Dashed line is the typical October level.
Typical level through the year
Each bar spans the range of monthly averages on record for that month. The line marks the median. The orange dot is where the lake sits now.
Recent daily readings
| Date | Level (ft (gage datum)) | Change |
|---|---|---|
| Oct 24, 2026 | 53.47 | -0.69 |
| Oct 23, 2026 | 54.16 | -0.59 |
| Oct 22, 2026 | 54.75 | -0.65 |
| Oct 21, 2026 | 55.40 | -0.26 |
| Oct 20, 2026 | 55.66 | +0.85 |
| Oct 19, 2026 | 54.81 | +0.87 |
| Oct 18, 2026 | 53.94 | +0.50 |
| Oct 16, 2026 | 53.44 | -0.29 |
| Oct 15, 2026 | 53.73 | -0.34 |
| Oct 14, 2026 | 54.07 | +0.13 |
| Oct 13, 2026 | 53.94 | +0.16 |
| Oct 12, 2026 | 53.78 | +0.21 |
| Oct 11, 2026 | 53.57 | +0.48 |
| Oct 10, 2026 | 53.09 | +0.80 |
Reading these numbers
This gauge reports gage height, measured against a local reference point at the station rather than sea level. The number is useful for tracking rises and drops, but it is not an elevation, so do not compare it with charts that list elevations above sea level.
On a reservoir, a few feet of drop changes the shoreline more than you would think. Low water exposes stumps, sandbars and old roadbeds that are normally well under the hull, and some ramps end before the water does.
High water brings its own problems: floating debris after storms, flooded docks and courtesy piers, and no-wake rules near flooded campgrounds. A quick look at the trend before you hitch up saves a wasted trip.
The gauge is listed by USGS as Wahiawa Reservoir at Spillway at Wahiawa, Oahu, HI. Wind can pile water up at one end of a big lake for a few hours, so short spikes on a windy day are normal.
Wahiawa Reservoir (Lake Wilson) water level questions
What is the water level at Wahiawa Reservoir (Lake Wilson) today?
Wahiawa Reservoir (Lake Wilson) was at 52.27 ft on the gage on October 25, falling 2.54 ft over the past week. That is well below normal for October: the typical October level is 68.39 ft, so the lake is 16.12 ft below its usual mark.
Is Wahiawa Reservoir (Lake Wilson) high or low right now?
Compared with the long-term record for October, the lake is well below normal. The October monthly average has ranged from 64.26 to 80.03 ft, with a typical value of 68.39 ft.
Is Wahiawa Reservoir (Lake Wilson) rising or falling?
Over the last seven days the level has fallen (-2.54 ft), and it is -2.33 ft compared with 30 days ago.
Where does the Wahiawa Reservoir (Lake Wilson) water level data come from?
From the U.S. Geological Survey, gauge 16210000 (Wahiawa Reservoir at Spillway at Wahiawa, Oahu, HI). USGS publishes provisional readings every 15 to 60 minutes; they can be revised later after quality checks.
How often is this page updated?
The page itself is rebuilt every day with the latest daily values, and the current reading refreshes straight from the USGS each time you open it.
Nearby lakes
If Wahiawa Reservoir is blown out, these are the closest alternatives. Tap through for their water levels.