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Generated small eastern Idaho tributary scene representing the South Teton River near Rexburg, not an exact location photo
All Idaho reports

South Teton River near Rexburg

Generated artwork: BlueStreamFly · Regional illustration; not the exact location.

Should I go fishing?

Check the water temperature first.

Water temperature is unconfirmed. Use a stream thermometer; stop trout fishing at 70°F or warmer, or sooner if fish show stress.

Rating updatedRiver local time:

Why this recommendation?

USGS shows 62 cfs. The flow has been stable over about 6 hours. USGS marks this reading provisional and may revise it. USGS records for this date (1984-2025, 41 readings) show a typical middle range of 43 cfs to 125 cfs. Flow is within the typical range for this date, so weather, temperature, and access become the next checks.

Available live dataHighHow much of the live flow, weather, and alert data came back.
Confidence in this recommendationMediumWater temperature not verified; do not use this score to clear warm-water risk.
Usually checks again about every 45 minutes

If you go

Check first
RiverReports is the quick chart, backed by USGS 13055340 SF Teton River near Rexburg ID.
Try
Move slowly and fish upstream or quartering upstream so the first cast into each small pocket is useful.
Leave when
Skip when smaller stream rules are closed, water is muddy, or low warm conditions would stress trout.

Flow and weather

Showing server-checked river conditions while current readings refresh.
Flow
62 cfs
From the latest stored river check. Open the official source for the newest reading.
Air forecast
56°F
Next 24h high
81.0°F

NWS air forecast near

Rain chance
0%

This is an air forecast, not a river-temperature reading. Check the water with a stream thermometer before fishing in hot weather.

Latest stored weather check

Mostly Clear

Wind
7 mph
Weather checked
More forecast and source details

Mostly Clear

National Weather Service

South Teton River near Rexburg forecast point

The National Weather Service forecast is temporarily unavailable.

Live data

Where these readings come from

RiverReports gauge: SF Teton River near Rexburg

Official USGS station Opens in a new tab.RiverReports gauge Opens in a new tab.Official NWS forecast Opens in a new tab.

Flies for this time of year

Seasonal starting points, not a live hatch report. Match what you see on the water.

See flies for every season
SeasonWhat to look forFlies to try

Each fly name opens its matching Fly Box guide.

More fishing tips

Methods, fish species and trip notes

How to fish South Teton River near Rexburg today.

The South Teton is best as a short, careful small-water plan when the gauge is steady, water is cool, and access is obvious. It loses value during low warm summer periods, high muddy pulses, or any time the legal season and cutthroat rules do not support the trip.

Clear modest flow

Best for short dry-dropper rigs, small nymphs, and careful bank approaches.

Low warm water

Usually a reason to fish early, shorten the session, or skip trout fishing entirely.

Muddy pulse

Wait for visibility to recover. Small smaller streams lose fishability quickly when stained.

Cool shoulder season

Can fish with nymphs and small streamers when rules and access allow.

Wading, bank fishing or floating?
Access choicesNo single best option

Wading and Floating have the same top score. Use current access, footing, weather, and local rules to choose.

Wading92/100

Wading is in play only where your chosen access has clear footing, legal entry, and no forced crossings.

Bank fishingNot recommended

This report does not recommend bank fishing on this reach.

Floating92/100

A float is in play where this report supports boat access and wind, releases, and shuttle logistics are manageable.

Full river report

Is South Teton River near Rexburg worth the trip today? Check flow, weather, hatches, access, and rules for Idaho before you go.

The South Teton near Rexburg can be useful when flows are clear, modest, and cool enough for careful trout fishing. The reach gets less attention than the main Teton, but that does not make it simple: smaller stream rules, low summer water, private edges, and small-water etiquette all matter.

Fishing words used on this page
U.S. Geological Survey (USGS) gauge
A USGS gauge is an official river station that measures flow or water height.
Cubic feet per second (cfs)
Cubic feet per second, or cfs, shows how much water passes the gauge each second.
Nymph
A nymph is a young water insect. Anglers also use the word for a fly that copies it.
Blue-winged olive (BWO)
Blue-winged olives, or BWOs, are small mayflies that often hatch in cool or cloudy weather.
Caddis
Caddis are small water insects. The adults look a little like tiny moths.
Dry-dropper
A dry-dropper rig has a floating fly with an underwater fly tied below it.
Emerger
An emerger copies an insect as it rises from below the water toward the surface.
Indicator
An indicator is a small floating marker that can show when a fish takes an underwater fly.
Midge
Midges are tiny flies and a common trout food, especially in cold water.
Pale morning dun (PMD)
Pale morning duns, or PMDs, are light-colored mayflies that often hatch in warmer months.
Why this call

Why this score

FlowHelps

USGS shows 62 cfs. The flow has been stable over about 6 hours. USGS marks this reading provisional and may revise it. USGS records for this date (1984-2025, 41 readings) show a typical middle range of 43 cfs to 125 cfs. Flow is within the typical range for this date, so weather, temperature, and access become the next checks.

SeasonHelps

Late summer: Condition-dependent because low warm water can stress trout.

WeatherHelps

The current NWS air forecast is about 56F, and the next 24-hour high reaches about 81F. Mostly Clear.

Public alertsHelps

No active NWS alert was returned for this forecast point.

Fishing usefulnessHelps

Skip when tributary rules are closed, water is muddy, or low warm conditions would stress trout.

Trip notes

Check these before you choose a reach.

Best flows

Clear, modest flows that keep enough depth in buckets without making crossings muddy or pushy.

When to leave

Skip when smaller stream rules are closed, water is muddy, or low warm conditions would stress trout.

Local plan

Base in Rexburg, check IDFG first, confirm public access, then fish short sections slowly with light rigs.

Backup water

Use the main Teton, Teton at Driggs, or South Fork Snake when the South Teton is too low, warm, or access-limited.

South Teton River near Rexburg access and rules.

Use these places as starting points. Open the access link below and check posted signs before you park or enter.

Before you go

Check Idaho Fish and Game rules for the South Teton River and Henrys Fork smaller streams before fishing, including season dates and cutthroat harvest restrictions.

Where to access the river

Rexburg area

Use the city area as the orientation base, then confirm legal public entry before fishing.

Eagle Park vicinity

A Rexburg public-recreation reference point for local area planning, not a license to cross private land.

Signed road crossings and public edges

Fish only where access and parking are clearly legal.

  • The South Teton is not a broad public area everywhere. Legal entry and private-property awareness are central to the plan.
  • City and park references help with orientation, but anglers still need to verify where fishing access is allowed.
  • Small-water pressure adds up quickly. Rotate through short sections and avoid crowding obvious buckets.

If this water does not fit the day, check another report before you start the drive.

IdahoTeton River fishing reportUse the main-stem page when you want broader lower-valley access and a larger river plan.IdahoTeton River fishing reportA higher-valley Teton option with a different gauge and access pattern.IdahoSouth Fork of the Snake River fishing reportA larger structured float backup when small tributary water is too low or warm.
See all Idaho fly fishing reports

Sources and report details

Official agencies and primary river operators come first. Secondary tools are labeled so you know what carries the most weight.

Rules and closures

Check what is allowed, where the rule applies, and whether the river is open.

Flow and weather

Check the latest river reading and forecast before you leave.

Access and land

Check public entry points, land rules, and seasonal access changes.

See all 5 checked sources

Rules and closures

Check what is allowed, where the rule applies, and whether the river is open.

Flow and weather

Check the latest river reading and forecast before you leave.

Access and land

Check public entry points, land rules, and seasonal access changes.

Source check is old. Last checked . Open the official links now and check for changes.

See something wrong? Report a source problem. Please do not send private spots or private access notes.

How this report was checked

How this report was checked

Trip guidance checked

What was checked: This report uses official regulation, flow, weather, access, and public-land sources first, then adds practical planning guidance for fly anglers.

Live measurements and forecasts keep their provider timestamps. Rules, access, and trip guidance use the source-review date shown here. BlueStreamFly planning advice is editorial interpretation, not an agency notice.

First-hand experience: BlueStreamFly does not claim a first-hand visit or local field test for this report unless a real contributor is explicitly named and linked.

Quick questions

Is this the same as the main Teton River page?

No. This page covers the South Teton River near Rexburg, a smaller stream-style water with different access and rule checks.

What gauge should I use?

Use RiverReports for the quick chart and USGS 13055340 SF Teton River near Rexburg ID as the official flow reference.

Why do the names South Teton and South Fork Teton both appear?

RiverReports and USGS use South Fork Teton flow language, while Idaho Fish and Game lists the water as South Teton River. The page keeps both clear.