Reservoir · Montana · United States · USACE CWMS
Lake Sherburne
65.9% full
Capacity
83.7 hm³
Volume stored
55 hm³
Coordinates
48.828°N, 113.521°W
Last updated
2026-08-13
Current fill
65.9%vs 7 days ago
-11.5%losing
vs 1 year ago
-3.5%year-over-year
7-day trend
↓falling
Data source: USACE CWMS — US Army Corps of Engineers — daily reservoir storage volume. Capacity is the design (normal full-pool) capacity from the US National Inventory of Dams (NID); fill % = current volume ÷ design capacity. Last reading: 2026-08-13.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 48.828, -113.521 · Open in Google Maps
About Lake Sherburne
As of August 13, 2026, Lake Sherburne is filled to 65.9% of its total capacity, holding roughly 55 hm³ of water out of a maximum 84 hm³. At this level the reservoir is within its normal operating range.
Over the most recent week on record the fill level has fallen by 11.5 percentage points, and it is 3.5 points below its level on the same date a year earlier.
Across the readings we hold for Lake Sherburne — 1819 data points between August 15, 2021 and August 13, 2026 — the level has ranged from a low of 14.0% (September 16, 2021) to a high of 97.8% (June 30, 2026). On average the reservoir is fullest around July and at its lowest around October.
It is operated by USACE primarily for multiple purposes. It lies within the Montana basin at 48.828°N, 113.521°W.
Key facts
- Current fill level
- 65.9%
- Water stored
- 55 hm³
- Total capacity
- 84 hm³
- 7-day change
- ▼ 11.5 pts
- Year-on-year
- ▼ 3.5 pts
- Primary use
- Multipurpose
- River basin
- Montana
- Operator
- USACE
- Coordinates
- 48.828°N, 113.521°W
- Last updated
- August 13, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 13 Aug 2026 | 65.9% | 55 |
| 12 Aug 2026 | 67.3% | 56 |
| 11 Aug 2026 | 68.8% | 58 |
| 10 Aug 2026 | 70.4% | 59 |
| 9 Aug 2026 | 72.1% | 60 |
| 8 Aug 2026 | 73.7% | 62 |
| 7 Aug 2026 | 75.4% | 63 |
| 6 Aug 2026 | 77.4% | 65 |
| 5 Aug 2026 | 78.9% | 66 |
| 4 Aug 2026 | 80.3% | 67 |
| 3 Aug 2026 | 81.7% | 68 |
| 2 Aug 2026 | 83.2% | 70 |
Frequently asked questions
What is the current water level of Lake Sherburne?
As of August 13, 2026, Lake Sherburne is at 65.9% of its capacity, holding approximately 55 hm³ of water, according to USACE CWMS (US Army Corps of Engineers) data.
Is Lake Sherburne reservoir full?
No. As of August 13, 2026, Lake Sherburne is within its normal operating range at 65.9% of its capacity, so it is not full.
Is the water level at Lake Sherburne rising or falling?
The level at Lake Sherburne is falling — it dropped 11.5 percentage points over the latest week on record.
How much water can Lake Sherburne hold?
Lake Sherburne has a total capacity of 84 hm³.
Where is Lake Sherburne reservoir located?
Lake Sherburne is located in Montana, United States, within the Montana basin (coordinates 48.828°N, 113.521°W).
What is Lake Sherburne used for?
Lake Sherburne is used primarily for multiple purposes, and is managed by USACE.