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USGS Gauge 04135700 — South Branch Au Sable River near Luzerne, Michigan
Water temperature 54.0 °F. 1.4 °F below the five-year normal for this date. 143 cfs.
Open in BirdTrout44.61474, -84.45557 · 1059 ft elevation · 382 sq mi drainage. This gauge on USGS Water Data →
Right now
- 54.0 °F Water temperature
- 143 Cubic ft / second
- -1.4 °F vs 5-yr normal
- 58.9 °FThis date last year
Live from USGS — the numbers above are current rather than whenever the page was written. The normal is the mean of every reading at this gauge within 3 days of this calendar date in the previous years of record — 31 readings, averaging 58.6 °F.
The last thirty days
Daily means from USGS. A gap in the line is a gap in the record.
The record at this gauge
| Month | Mean temp | Mean flow |
|---|---|---|
| Jan | 34.2 °F | 162 |
| Feb | 35.1 °F | 151 |
| Mar | 38.1 °F | 271 |
| Apr | 47.1 °F | 473 |
| May | 57.5 °F | 270 |
| Jun | 62.9 °F | 160 |
| Jul | 65.8 °F | 150 |
| Aug | 62.6 °F | 126 |
| Sep | 58.0 °F | 129 |
| Oct | 50.2 °F | 135 |
| Nov | 41.2 °F | 158 |
| Dec | 36.0 °F | 173 |
- 74.5 °FWarmest, 2025-06-23
- 32.2 °FColdest, 2022-01-07
- 1,450Highest flow, 2026-04-15
- 92Lowest flow, 2025-09-17
Computed here from the last 5 years of USGS daily values at this gauge — 1,826 temperature days over 5.0 years and 1,826 flow days. These are not USGS-published normals, and a month with fewer than 20 days of record is left blank rather than averaged.
What this gauge predicts
This is one of the gauges this site fits an air-to-water model against, which is how the map colours water that has no gauge on it. July mean 65.73 °F; the fit explains 80% of the variance with a typical error of 2.192 °F.
The water it stands in
South Branch Au Sable River, classified Cold transitional large river by MDNR VSEC — the nearest reach carrying that classification is 1.29 mi from the gauge.
Snapped to NHD reach South Branch Au Sable River (60001900007352), 19.2 m away. That join is what lets the app paint this gauge's reading onto the reach it measures.
Other gauges near this one
- Nb Au Sable River at Kelloggs Br near Lovells, MI 7.3 mi · USGS 04135800
- Au Sable River at Mio, MI 16.2 mi · USGS 04136500
- Manistee River near Grayling, MI 20.0 mi · USGS 04123500
Access near this gauge
- Smith Bridge 0.0 mi · boat launch · Au Sable River - South Branch
- Canoe Harbor State Forest Campground 0.8 mi · canoe launch · Au Sable River - South Branch
- South Branch Au Sable River Truettner Tract 0.8 mi · walk in
- South Branch Au Sable River Lelands Lot 1.8 mi · walk in
- South Branch Au Sable River Downeys North and South 2.0 mi · walk in
- South Branch Au Sable River Downeys Stone Wall 2.3 mi · walk in
Fly shops nearby
- Gates Au Sable Lodge6.7 mi · Grayling
- Village Outfitters10.4 mi · Roscommon
- Fuller's North Branch Outing Club13.1 mi · Lovells
- Old AuSable Fly Shop13.1 mi · Grayling