Fishing forecast for Boise, ID

The Boise River runs through the middle of Boise with the Greenbelt, a 29-mile pathway, along its north and south banks, and IDFG describes the city reach as holding wild trout along with stocked hatchery rainbow and brown trout. Upstream, Lucky Peak Reservoir is known for kokanee and rainbow trout. About 48 miles south-southeast in a straight line, C.J. Strike Reservoir on the Snake River holds smallmouth and largemouth bass, crappie, catfish and yellow perch.

Best fishing times in Boise this week

Majors run an hour either side of the moon crossing the meridian over Boise, ID; minors, half an hour either side of moonrise and moonset. Where those widths come from: best fishing times and how we compute these times.

When these windows are not the right tool

Solunar theory is John Alden Knight's 1926 prediction; the ±60 and ±30 minute widths are convention, not calculation. The times are computed astronomy, the claim that fish feed inside them is not. The day rating follows moon phase — identical nationwide, so every city shows it the same. A moving front beats the moon: apps that read pressure.

Where to fish in Boise

This page is built around Boise River, with Lucky Peak and C.J. Strike in reach — fresh water, about 5 minutes from the middle of Boise.

IDFG stocks catchable rainbow trout into the Boise River through town across most of the year rather than only in the warm months: its records for the reach from Strawberry Glen to Barber Dam show releases in every month from June through March between 2024 and 2026.

The river through town reaches its lowest flow of the year in November, not in late summer. At the USGS gauge at Glenwood Bridge, 1991–2025 monthly means fall from about 610 cubic feet per second in September to about 250 in November, while the unregulated river near Twin Springs, above the reservoirs, rises from about 350 to about 450 over the same months.

The Boise River Greenbelt is a 29-mile tree-lined pathway that the City of Boise says follows the north and south sides of the river through the heart of the city, and it runs as a multi-jurisdiction path from Lucky Peak all the way to Eagle.

The nearest grids we publish are Portland, OR (555 km, Columbia River) and Seattle, WA (651 km, Puget Sound). Different water, and different minutes.

What you can catch in Boise

State listings put these 5 fish in the water around Boise. Plan around the peak, not the open season.

The city reach is not only hatchery water: IDFG describes the Boise River from Strawberry Glen to Barber Dam as holding wild trout alongside stocked hatchery rainbow and brown trout, and its surveys from Barber Park down to Eagle Island found healthy populations of rainbow and brown trout and mountain whitefish.

C.J. Strike Reservoir lies near Grand View and Bruneau, in Elmore and Owyhee counties, and IDFG surveys there have recorded black and white crappie, channel catfish, smallmouth and largemouth bass and yellow perch, a warm-water fishery separate from the trout river through Boise.

Kokanee fishing at Lucky Peak is a spring and early-summer fishery: IDFG says it starts to turn on in the weeks approaching spring and stays good through mid-summer. Mature fish turn bright red with green heads before spawning, and in years with adequate flows and temperatures they ascend Mores Creek beginning in late July.

Tackle sits outside a forecast page: start with how to catch trout.

Water temperature and season in Boise

Air here swings 45.2 °F across the year, from 32.1 °F in December to 77.3 °F in July. No gauge measures water temperature here, so the chart below is air only.

Monthly climate for Boise, ID. The air line is the NOAA NCEI climate normal for 1991–2020 — the thirty-year average of a calendar month, not the weather of any one year — measured at BOISE AIR TERMINAL, ID US (USW00024131), 6.8 km from the middle of town, with 26–27 of the thirty years behind each month. No gauge measures water temperature here, so this chart is air only. Water lags air by weeks and the lag grows with depth — a deep reservoir turns later than a shallow bay — so air is never a stand-in for a thermometer in the water. Read into this site on 2026-09-14.

The table shows only average air, and the same airport's normals explain why weather barely moves this river: July and August together bring 0.38 inches of precipitation, so the high summer flow through town is water released from the dams. Those normals also give the daily range, 30.8 degrees between the July high and low against 13.3 in January, and a shallow backwater follows that nightly drop far more closely than a deep reservoir does.

Sunrise, sunset and daylight in Boise

The moon window moves daily; the sun does not. Plan a season against this block.

The longest day of 2026 is June 21, 15h 26m; the shortest, December 21, 8h 56m. The meridian passing drifts about 50 minutes later daily: a dawn window this week is an afternoon window in a fortnight.

Kokanee, the landlocked form of sockeye salmon, are the reservoir target above town. In Lucky Peak, IDFG says, they reach 10 to 13 inches after one year and 14 to 17 inches after two, when they typically spawn, and the agency advises looking for them around large points and across the face of dams, often with a depth finder.

Boise keeps Mountain time, and the state name is no guide to the clock: Idaho north of the Salmon River keeps Pacific time. The times on this page follow the city, not the state.

Summer precipitation barely registers here: the airport's 1991–2020 normals give 0.21 inches in July and 0.17 in August. Even so, the river through town keeps about 34 percent of its May flow in August at the USGS Glenwood Bridge gauge, against about 12 percent for the unregulated river near Twin Springs above the reservoirs.

License and seasons in Idaho

Rules for Idaho come from Idaho Department of Fish & Game, and the calculation behind the table is set out in how we compute these times.

Boat ramps and fishing access in Boise

Public registries put 8 access points within reach of Boise, 7 of them trailer ramps. The nearest is Glenwood Bridge, about 4.8 mi out in a straight line.

8 access points within 25 km of Boise, ID, from 2 agency registries — the same records the table below lists. Each dot is a record its source publishes, not a place we have visited; click one for what that source says. The dashed ring is that 25 km circle, centred on the point every distance is measured from — click that centre for its coordinates, even when a cluster sits on it. Zoom in to split a cluster.