Wahiawa Reservoir, HI

As of 2026-10-12, Wahiawa Reservoir sits at 53.78 ft, which is low for this time of year. Over the past 30 days the level has fallen 17.07 ft.

The most recent reading at Wahiawa Reservoir is 53.78 ft (2026-10-12), sourced from the U.S. Geological Survey. Readings on this page refresh automatically as the agency publishes new data.

The highest level for Wahiawa Reservoir in our records is 82.96 ft on 2026-03-20. The lowest is 45.91 ft on 2026-07-08. Our record covers about 21 years of readings.

Compared with every October in our records, the current level is higher than 2% of them, which we classify as low for this time of year. Seasonal comparison matters more than the raw number, because most reservoirs draw down predictably through late summer and refill over winter and spring.

Reservoir levels move for four main reasons: rainfall and runoff into the basin, releases through the dam for downstream water supply, power generation or flood control, evaporation during hot months, and seasonal drawdown schedules set by the operating agency. Wahiawa Reservoir has fallen 17.07 ft over the past 30 days. For the operational reason on any given week, check the U.S. Geological Survey directly.

Wahiawa Reservoir is -6.03 ft compared with this date last year (53.78 ft today). The full-history chart above covers 21 years, with a record high of 82.96 ft and a record low of 45.91 ft.