Rivermatics

USGS Streamgage 13211205

Boise River at Caldwell, ID

Boise River at Caldwell, ID is USGS streamgage 13211205 in Idaho, monitoring river discharge in hydrologic subbasin 17050114. It sits on the Boise River, alongside 4 other gauges Rivermatics tracks on the same river. It drains a watershed of about 3,363 square miles. Discharge records at this site go back to 2015. Typical flow runs near 504 cfs in July and 2,364.6 cfs in April, with the higher of the two arriving in April. Rivermatics issues a daily machine-learned flow outlook for this gauge, reaching 14 days ahead, alongside daily high and low water-temperature forecasts.

View live conditions & forecast →

Gauge details

State
Idaho
Drainage area
3,363 sq mi
Subbasin (HUC-8)
17050114
Coordinates
43.67735, -116.70113
USGS site number
13211205
Records begin
2015-11-16 (11 years)
Rivermatics forecast
14-day flow outlook + water temperature

14-day flow forecast

Based on observations through for Boise River at Caldwell, ID. Each day carries a median estimate and the band the model expects the flow to fall within — not a single number to plan against. Forecasts are re-issued daily; see the live screen for the current outlook.

Forecast daily mean discharge in cubic feet per second, by date
Date Low p10 Expected p50 High p90 Range
564 594 624
546 588 632
531 582 642
516 573 643
506 568 651
495 564 657
485 559 662
471 550 661
451 535 651
441 528 652
426 515 636
418 512 643
414 511 652
405 506 645

All values in cubic feet per second (cfs). Estimates only — do not use them for navigation or for any safety, rescue, or emergency decision.

Typical flow by month

Long-term daily discharge percentiles from the USGS record (up to 11 years of data), averaged within each month. These describe the historical normal range — they are not a forecast and not today's reading.

Historical monthly discharge percentiles in cubic feet per second
Month Low p10 Typical p50 High p90 Range
January 506.5 556.5 654.2
February 474.8 549.6 2,100.1
March 336.9 509.7 6,790.6
April 233.5 2,364.6 7,826.7
May 346.3 1,835.5 8,056.8
June 398.5 1,565.8 6,414
July 234.6 504 1,464.8
August 323.3 475 659.9
September 395.5 645.4 878
October 385.2 588.4 765.6
November 505 564.3 604.9
December 496 548.3 636.9

All values in cubic feet per second (cfs).

Common questions

When does Boise River at Caldwell, ID normally run highest?
April, on the long-term record. The median daily flow that month is about 2,364.6 cfs, against 475 cfs in August, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
What is a normal flow for Boise River at Caldwell, ID?
It depends on the month. In January, half of days historically fall near 556.5 cfs, with the middle 80% of days between 506.5 and 654.2 cfs. The month-by-month table on this page gives the full range.
How long has Boise River at Caldwell, ID been measured?
Discharge records at USGS site 13211205 begin in 2015, about 11 years, covering roughly 3,913 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
Is there a flow forecast for Boise River at Caldwell, ID?
Yes. Rivermatics trains a machine-learned model — a temporal-fusion transformer — on this basin's observed flows, weather, and snowpack, and issues a daily flow outlook reaching 14 days ahead: a median estimate inside a confidence band, not a single number to bet on. A companion model forecasts each day's water-temperature high and low. Every forecast is scored against days the model never trained on, and that track record is published on the live gauge screen. Open live conditions to see the current outlook.
Where is Boise River at Caldwell, ID?
The gauge sits at 43.67735, -116.70113, in Idaho, in hydrologic subbasin 17050114, draining roughly 3,363 square miles.
Can I use Boise River at Caldwell, ID data for flood or safety decisions?
No. Rivermatics provides estimates, not guarantees, and the readings and forecasts here may be delayed, inaccurate, or wrong. Do not use them for navigation or for any safety, rescue, or emergency decision. Check the National Weather Service and USGS directly, and use your own judgment.

Upstream and downstream on the Boise River

Every gauge Rivermatics tracks on this river, ordered by drainage area — upstream first. See the Boise River in full.

Other gauges in this subbasin