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Mackay Reservoir water level today

Lake in Custer County, Idaho

22.25ft
6.78 m · gauge reading (local datum, not an elevation)
Measured · provisional
Below normal for the dateRisingNOAA: No flooding
24 hours
▲ 0.47 ft
7 days
▲ 2.86 ft
30 days
▼ 2.59 ft
Normal for Oct 23 ?
35.22 ft

At a glance · Oct 23

Lower than usual

Mackay Reservoir is 13.0 ft lower than normal for Oct 23, lower than on this date in 8 of the last 9 years.

  • This week↗ Rising 2.86 ft
  • Lowest on record↓ 7.74 ft (2002)

Compared with this gauge's own records for the same date. A statistical guide, not advice.

Normal for Oct 23Record lowToday22.25 ft

Today compared with past years on Oct 23

Lowest to highest on this date: 8.54–11,900.00 ftUsual range (10th–90th percentile): 15.79–54.89 ftNormal (25th–75th percentile): 23.85–46.52 ftToday: 22.25 ftToday 22.25 ftMedian 35.22Highest 11,900.0025th
Lowest to highest on this date: 8.54–11,900.00 ftUsual range (10th–90th percentile): 15.79–54.89 ftNormal (25th–75th percentile): 23.85–46.52 ftToday: 22.25 ftToday 22.25 ftMedian 35.22Highest 11,900.0025th

Where today's reading sits among this gauge's own records for the same date (±3 days). A statistical guide, not advice.

What this means

It is lower than on Oct 23 in 8 of the last 9 years.

The lake has risen 2.86 ft in 7 days and fallen 2.59 ft in 30 days.

Since 1993, the lowest daily level was 7.74 ft (Oct 2002) and the highest 31,100.00 ft (Feb 1994).

Mackay Reservoir level chart

Loading chart…

Measured Normal range for the date (middle 50% of past years)

2026 compared with 2025

623395571JanFebMarAprMayJunJulAugSepOctNovDec202520262025-09-02: 18.53 ft2025-09-07: 15.71 ft2025-09-25: 11.17 ft2025-09-30: 11.21 ft2025-10-05: 11.19 ft2025-10-10: 11.22 ft2025-10-15: 11.28 ft2025-10-20: 13.91 ft2025-10-25: 16.97 ft2025-10-30: 19.43 ft2025-11-04: 22.01 ft2025-11-09: 24.23 ft2025-11-14: 26.13 ft2025-11-19: 27.93 ft2025-11-24: 29.69 ft2025-11-29: 31.34 ft2025-12-04: 32.88 ft2025-12-09: 34.30 ft2025-12-14: 35.63 ft2025-12-19: 36.87 ft2025-12-24: 38.20 ft2025-12-29: 39.45 ft2026-01-03: 40.61 ft2026-01-08: 41.69 ft2026-01-13: 42.61 ft2026-01-18: 43.54 ft2026-01-23: 44.42 ft2026-01-28: 45.25 ft2026-02-02: 46.05 ft2026-02-07: 46.81 ft2026-02-12: 47.55 ft2026-02-17: 48.32 ft2026-02-22: 48.96 ft2026-02-27: 49.58 ft2026-03-04: 50.21 ft2026-03-09: 50.86 ft2026-03-14: 51.41 ft2026-03-19: 51.93 ft2026-03-24: 52.64 ft2026-03-29: 54.27 ft2026-04-03: 55.85 ft2026-04-08: 57.00 ft2026-04-13: 58.26 ft2026-04-18: 59.41 ft2026-04-23: 60.29 ft2026-04-28: 61.18 ft2026-05-03: 61.26 ft2026-05-08: 60.81 ft2026-05-13: 60.83 ft2026-05-18: 61.22 ft2026-05-23: 61.01 ft2026-05-28: 61.33 ft2026-06-02: 61.47 ft2026-06-07: 61.30 ft2026-06-12: 60.92 ft2026-06-17: 60.64 ft2026-06-22: 60.33 ft2026-06-27: 59.88 ft2026-07-02: 59.69 ft2026-07-07: 58.55 ft2026-07-12: 56.71 ft2026-07-17: 54.50 ft2026-07-22: 52.32 ft2026-07-27: 49.98 ft2026-08-01: 47.59 ft2026-08-06: 44.98 ft2026-08-12: 41.57 ft2026-08-17: 39.20 ft2026-08-22: 37.20 ft2026-08-28: 34.57 ft2026-09-02: 32.47 ft2026-09-07: 30.22 ft2026-09-12: 28.07 ft2026-09-17: 26.23 ft2026-09-22: 25.12 ft2026-09-27: 23.67 ft2026-10-02: 22.19 ft2026-10-07: 20.54 ft2026-10-12: 19.27 ft2026-10-17: 19.89 ft
623395571JanAprJulOct202520262025-09-02: 18.53 ft2025-09-07: 15.71 ft2025-09-25: 11.17 ft2025-09-30: 11.21 ft2025-10-05: 11.19 ft2025-10-10: 11.22 ft2025-10-15: 11.28 ft2025-10-20: 13.91 ft2025-10-25: 16.97 ft2025-10-30: 19.43 ft2025-11-04: 22.01 ft2025-11-09: 24.23 ft2025-11-14: 26.13 ft2025-11-19: 27.93 ft2025-11-24: 29.69 ft2025-11-29: 31.34 ft2025-12-04: 32.88 ft2025-12-09: 34.30 ft2025-12-14: 35.63 ft2025-12-19: 36.87 ft2025-12-24: 38.20 ft2025-12-29: 39.45 ft2026-01-03: 40.61 ft2026-01-08: 41.69 ft2026-01-13: 42.61 ft2026-01-18: 43.54 ft2026-01-23: 44.42 ft2026-01-28: 45.25 ft2026-02-02: 46.05 ft2026-02-07: 46.81 ft2026-02-12: 47.55 ft2026-02-17: 48.32 ft2026-02-22: 48.96 ft2026-02-27: 49.58 ft2026-03-04: 50.21 ft2026-03-09: 50.86 ft2026-03-14: 51.41 ft2026-03-19: 51.93 ft2026-03-24: 52.64 ft2026-03-29: 54.27 ft2026-04-03: 55.85 ft2026-04-08: 57.00 ft2026-04-13: 58.26 ft2026-04-18: 59.41 ft2026-04-23: 60.29 ft2026-04-28: 61.18 ft2026-05-03: 61.26 ft2026-05-08: 60.81 ft2026-05-13: 60.83 ft2026-05-18: 61.22 ft2026-05-23: 61.01 ft2026-05-28: 61.33 ft2026-06-02: 61.47 ft2026-06-07: 61.30 ft2026-06-12: 60.92 ft2026-06-17: 60.64 ft2026-06-22: 60.33 ft2026-06-27: 59.88 ft2026-07-02: 59.69 ft2026-07-07: 58.55 ft2026-07-12: 56.71 ft2026-07-17: 54.50 ft2026-07-22: 52.32 ft2026-07-27: 49.98 ft2026-08-01: 47.59 ft2026-08-06: 44.98 ft2026-08-12: 41.57 ft2026-08-17: 39.20 ft2026-08-22: 37.20 ft2026-08-28: 34.57 ft2026-09-02: 32.47 ft2026-09-07: 30.22 ft2026-09-12: 28.07 ft2026-09-17: 26.23 ft2026-09-22: 25.12 ft2026-09-27: 23.67 ft2026-10-02: 22.19 ft2026-10-07: 20.54 ft2026-10-12: 19.27 ft2026-10-17: 19.89 ft
20262025Normal (middle 50% of past years)Usual range (10th–90th percentile)Median

Each year drawn on the same January–December axis, over this gauge's normal range for each date. Hover or tap a point for its value.

Same date in past years

DateLevelvs today
Oct 23, 202515.88 ft▼ 6.37 ft
Oct 23, 202423.90 ft▲ 1.65 ft
Oct 23, 202237.16 ft▲ 14.91 ft
Oct 23, 202123.35 ft▲ 1.10 ft
Oct 23, 202029.25 ft▲ 7.00 ft
Oct 23, 201948.42 ft▲ 26.17 ft
Oct 23, 201850.09 ft▲ 27.84 ft
Oct 23, 201761.84 ft▲ 39.59 ft
Oct 23, 201635.22 ft▲ 12.97 ft

Records & details

Highest
31,100.00 ft on Feb 14, 1994
Lowest
7.74 ft on Oct 2, 2002
Records from
1993 (33 years of daily data)
Water temperature
Not measured here

Full history: yearly highs and lows, monthly averages →

Mackay

Height
75 ft
Completed
1918
Purposes
Other
Owner
Private
Normal storage
45,000 acre-ft
Surface area
1,392 acres

National Inventory of Dams (U.S. Army Corps of Engineers). All dam facts →

Boat ramps on Mackay Reservoir

2 ramps without a name, on the map: 12

2 ramps listed. Links open the ramp's location on OpenStreetMap. Check the managing agency for closures, especially at low water. All Idaho boat ramps →

Campgrounds near Mackay Reservoir

  • Joe T. Fallini Recreation Site0.7 mi · BLM

Federal campgrounds from Recreation.gov; straight-line distance from the lake's gauge or dam.

Weather & wind

This Afternoon46°F · Light Rain
Wind W 13 mph
Tonight26°F · Chance Rain And Snow then Mostly Cloudy
Wind WNW 6 to 17 mph
Saturday46°F · Sunny
Wind WNW 2 to 7 mph
Saturday Night26°F · Mostly Clear
Wind NNE 5 mph
Sunday50°F · Sunny
Wind E 6 mph
Sunday Night29°F · Partly Cloudy
Wind SSE 7 mph

NOAA National Weather Service forecast for this lake's location, updated 11 min ago.

Flood information

NOAA: No flooding

Flood status comes from the NOAA National Weather Service. We do not issue warnings. Flood stages explained. For official forecasts and warnings, see the NOAA gauge page.

Nearby lakes

All Idaho lake levels →