A small USGS stream gaging station with an antenna on its roof under a cloudy evening sky

Check a river’s flow.

Search any USGS stream gauge by river or station name, by state, or near you. Each card shows the latest flow and how it compares with the normal range for today’s date; open a gauge for the full picture: trend, water temperature and what it means for trout, safety and the official NWS flood stage.

Flow rate checkerSwitch tool

Your browser will ask before sharing your location. It is used once, rounded to about a kilometre, to list gauges within 30 miles, and is not stored.

4 USGS gauges near your location (within 60 miles)

SAWMILL C BL U TAILRACE NR SITKA AK

USGS 15087810

Limited data: Temperature fine for trout: no flow comparison here

No flow statistics here. The full view adds the NWS forecast.

Discharge: 72.4 ft³/s
Gauge height: 3.14 ft
Water temp: 46°F

Steady · 24 h

Last 24 hours

View data as a table

Discharge, last 7 days: readings, about hourly, newest first. USGS provisional data may be revised.
Time	Discharge (ft³/s)	Gauge height (ft)	Water temp (°F)
Nov 5, 4:45 PM AKST	72.4	3.14	46
Nov 5, 3:45 PM AKST	70.9	3.13	46
Nov 5, 2:45 PM AKST	72.4	3.14	46
Nov 5, 1:45 PM AKST	73.9	3.15	46
Nov 5, 12:45 PM AKST	72.4	3.14	46
Nov 5, 11:45 AM AKST	72.4	3.14	46
Nov 5, 10:45 AM AKST	70.9	3.13	46
Nov 5, 9:45 AM AKST	73.9	3.15	46
Nov 5, 8:45 AM AKST	70.9	3.13	45.9
Nov 5, 7:45 AM AKST	70.9	3.13	45.3
Nov 5, 6:45 AM AKST	70.9	3.13	44.8
Nov 5, 5:45 AM AKST	70.9	3.13	44.4
Nov 5, 4:45 AM AKST	72.4	3.14	43.9
Nov 5, 3:45 AM AKST	72.4	3.14	44.1
Nov 5, 2:45 AM AKST	72.4	3.14	43.9
Nov 5, 1:45 AM AKST	72.4	3.14	43.9
Nov 5, 12:45 AM AKST	72.4	3.14	43.9
Nov 4, 11:45 PM AKST	72.4	3.14	44.4
Nov 4, 10:45 PM AKST	73.9	3.15	44.6
Nov 4, 9:45 PM AKST	75.4	3.16	44.8
Nov 4, 8:45 PM AKST	75.4	3.16	45.3
Nov 4, 7:45 PM AKST	73.9	3.15	45.5
Nov 4, 6:45 PM AKST	73.9	3.15	45.5
Nov 4, 5:45 PM AKST	72.4	3.14	45.7
Nov 4, 4:45 PM AKST	72.4	3.14	45.9
Nov 4, 3:45 PM AKST	70.9	3.13	46.2
Nov 4, 2:45 PM AKST	69.5	3.12	46.2

Reading Nov 5, 4:45 PM AKST · checked 5:57 PM AKST

Open full screen USGS NWS

31.3 miles away in a straight line

SAWMILL C NR SITKA AK
USGS 15088000
Caution: Low water: go quiet and stealthy
No water temperature here. The full view adds the NWS forecast.
Flow, daily mean Oct 26
60.9 ft³/s
Daily mean flow for Mon, Oct 26: USGS publishes this gauge's flow once a day, after the day ends, not as live readings.
Much below normal for Oct 26
Open full screen USGS NWS
32.1 miles away in a straight line
INDIAN R AT SITKA AK
USGS 15087700
No current reading. USGS answered but returned no recent value for this gauge (ice, maintenance or a seasonal gauge).
Open full screen USGS NWS
32.7 miles away in a straight line
GREENS C AT GREENS CREEK MINE NR JUNEAU AK
USGS 15101490
No current reading. USGS answered but returned no recent value for this gauge (ice, maintenance or a seasonal gauge).
Open full screen USGS NWS
43 miles away in a straight line

Checked Nov 5, 5:57 PM AKST; readings refresh at most every 15 minutes and statistics daily. Provisional USGS data can be revised. Conditions change: re-check before you go. This is general guidance, not a fishing forecast, a safety guarantee or a statement about access.

SAWMILL C BL U TAILRACE NR SITKA AK
USGS 15087810 · AK · live flow · gauge height · water temperature · 31.3 mi
Reading the gauge…
SAWMILL C NR SITKA AK
USGS 15088000 · AK · daily flow · 32.1 mi
Reading the gauge…
INDIAN R AT SITKA AK
USGS 15087700 · AK · live flow · gauge height · water temperature · 32.7 mi
Reading the gauge…
GREENS C AT GREENS CREEK MINE NR JUNEAU AK
USGS 15101490 · AK · live flow · gauge height · water temperature · 43 mi
Reading the gauge…

Quick picks: our 2,852 waters by state

Each state opens its USGS gauges and our water pages there; a water opens the live cards for its gauges, or the NOAA tides for flats and surf.

Search covers 11,178 USGS stream gauges that reported discharge, gauge height or water temperature in the 183 days before 2026-10-23 (USGS series catalog); readings are fetched live when a gauge is shown.

Where these numbers come from

Discharge, gauge height, water temperature and water quality: U.S. Geological Survey readings (provisional, can be revised), cached for 15 minutes. Where USGS publishes a gauge’s flow only once a day, the latest daily mean is shown with its date.
Normal range: the 25th to 75th percentile of daily mean flow for the same calendar day over the gauge’s record (USGS daily statistics), classed as USGS does (hyswap).
Temperature guidance for trout quotes the gauge’s own state fish and wildlife agency; where we found none, it says so and quotes federal guidance (National Park Service, U.S. Fish and Wildlife Service). Cold-water safety quotes the NWS; dissolved oxygen and pH are read against EPA criteria. Each line names its source.
Flood stage and forecasts: the National Weather Service’s National Water Prediction Service and its Turn Around Don’t Drown guidance. Tides: NOAA Tides & Currents.

General guidance, not a fishing forecast, a safety guarantee or a statement about access. Planning a trip? The trip planner shows these readings on every day you fish a water.