Sugar River

Photo: John Phelan Opens in a new tab. · CC BY-SA 4.0

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: Sep 12, 2026, 1:51 AM EDT

Why this recommendation?

USGS shows 82 cfs. The flow has been stable over about 6 hours. USGS marks this reading provisional and may revise it. USGS records for this date (1928-2025, 98 readings) show a typical middle range of 53 cfs to 121 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: Use the West Claremont gauge before choosing a reach.
Try: Use short casts and move quietly. Many good Sugar River spots are small.
Leave when: Skip it when the gauge is rising, storm stain reduces visibility, summer water is too warm, or parking and public access are not clear at the chosen road or town reach.

Flow and weather

Showing server-checked river conditions while current readings refresh.

Flow: 82 cfs; Falling over about 6 hoursU.S. Geological Survey may revise this reading
Air forecast: 50°F
Next 24h high: 75.0°F
NWS air forecast near Sep 12, 2026, 4:00 PM EDT
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.

7-day U.S. Geological Survey chart

Recent flow

Discharge

97 cfs43 cfs

Sep 5Sep 12

Latest reading: 82 cfs. Falling over about 6 hours. Chart covers Sep 5 through Sep 12; readings are provisional and may be revised.

Latest stored weather check

Mostly Clear

Wind: 0 mph
Weather checked: Sep 12, 2026, 1:00 AM EDT

More forecast and source details

Mostly Clear

National Weather Service

Sugar River near West Claremont

The National Weather Service forecast is temporarily unavailable.

Live data

Where these readings come from

Current U.S. Geological Survey gauge: Sugar River at West Claremont

Falling over about 6 hoursU.S. Geological Survey may revise this readingObserved Sep 12, 2026, 1:30 AM EDT

Official U.S. Geological Survey station Opens in a new tab.Official NWS forecast Opens in a new tab.

These values are from the latest server-checked river data. JavaScript can refresh them with newer readings. Use the official links below for the newest readings before you fish.

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

March to April

What to look forMidges, early black stones, BWOs, stocked-trout nymph windows

Flies to try

Zebra Midgeblack stonefly nymphBlack Stonefly Patterns BWO emergerBlue-Winged Olive Patterns pheasant tailPheasant Tail Nymph

May to June

What to look forCaddis, Hendricksons, March Browns, sulphurs, light cahills

Flies to try

Elk Hair CaddisHendricksonHendrickson Patterns March BrownMarch Brown Dry Flies sulphur emergerSulphur Mayfly Patterns soft hackleSoft-Hackle Wet Flies

July to August

What to look forEvening caddis, terrestrials, midges, small mayflies in cold reaches

Flies to try

Foam antAnt Patterns beetleBeetle Patterns small hopperGrasshopper Patterns caddisCaddis Patterns by Stage Parachute Adams

September to OctoberThis season

What to look forBWOs, October caddis, midges, cooling-water streamer windows

Flies to try

BWOBlue-Winged Olive Patterns Zebra Midgesmall sculpinSculpin Patterns black leechLeech Patterns

Also try October caddis

Each fly name opens its matching Fly Box guide.

More fishing tips

Methods, fish species and trip notes

How to fish Sugar River today.

Good windows are cool, stable mornings after the river has settled from rain. If flow is climbing, visibility is poor, or water temperature is high, move to a colder stream or a bigger warmwater option.

Stable and cool

Fish nymphs, caddis, small dries, and soft hackles.

Slight stain

Try a small bugger or larger nymph near banks and tailouts.

Muddy or rising

Wait for the river to drop. Small rivers become unsafe quickly.

Low and warm

Fish early or choose a colder option.

Wading, bank fishing or floating?

Best access methodWading

These scores compare the risks of wading, bank fishing, and floating.

Wading · Best fit92/100

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.

FloatingNot recommended

This report does not recommend floating this reach.

Full river report

Is Sugar River worth the trip today? Check flow, weather, hatches, access, and rules for New Hampshire before you go.

The Sugar River gives Upper Valley anglers a local river plan with a real flow check. It can fish well when stable and cool, but rain and summer heat both deserve respect.

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.
Riffle: A riffle is shallow, fast water broken by rocks.
Tailout: A tailout is the shallow, slower water at the lower end of a pool.
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.
Midge: Midges are tiny flies and a common trout food, especially in cold water.

Why this call

Why this score

FlowHelps

SeasonHelps

Fall: Cooler water, BWOs, and small streamers.

WeatherHelps

The current NWS air forecast is about 50F, and the next 24-hour high reaches about 75F. Mostly Clear.

Public alertsHelps

No active NWS alert was returned for this forecast point.

Fishing usefulnessHelps

Skip it when the gauge is rising, storm stain reduces visibility, summer water is too warm, or parking and public access are not clear at the chosen road or town reach.

Trip notes

Check these before you choose a reach.

Best flows

Use USGS 01152500 at West Claremont as the lower-river anchor, then check rainfall and clarity because upper pockets can differ from the gauge reach.

When to leave

Skip it when the gauge is rising, storm stain reduces visibility, summer water is too warm, or parking and public access are not clear at the chosen road or town reach.

Local plan

Check the West Claremont flow, NH rules, stocking context, and weather, then fish compact dry-dropper or nymph rigs through shaded pockets, undercuts, and riffle tails.

Backup water

If the Sugar is low, warm, muddy, or access-limited, compare Mascoma, Upper Connecticut, or Merrimack depending on whether trout or warmwater fishing fits better.

Sugar River 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 New Hampshire freshwater rules, trout rules, seasons, and stocking updates for the exact Sugar River reach.

Where to access the river

West Claremont gauge reach

Primary flow reference before choosing a lower-river plan.

Newport area

Useful middle-river planning with bridge and public/private checks.

Sunapee-area headwater context

Important for understanding upper-river temperature and flow.

The Sugar has town and road access, but public water access is not continuous.
Bridge pull-offs are not always safe or legal parking areas.
Respect posted land and avoid damaging small stream banks.

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

New HampshireMascoma River fishing reportA nearby smaller-river option when conditions line up.

New HampshireUpper Connecticut River fishing reportA larger coldwater plan when the Sugar is low or warm.

New HampshireMerrimack River fishing reportA bigger mixed-river option with smallmouth potential.

See all New Hampshire 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.

Fishing rulesOfficial agencyNew Hampshire freshwater fishing digesteregulations.com (opens in a new tab)

Flow and weather

Check the latest river reading and forecast before you leave.

SafetyOfficial agencyNational Weather Service forecast pointforecast.weather.gov (opens in a new tab)

Access and land

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

Public accessOfficial agencyNH Fish and Game where-to-fish access resourceswildlife.nh.gov (opens in a new tab)

Rules and closures

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

Fishing rulesOfficial agencyNew Hampshire freshwater fishing digesteregulations.com (opens in a new tab)

What this source covers

Open the current rules and check the river section, season, and special limits.

Fishing rulesOfficial agencyNH Fish and Game fishing seasonswildlife.nh.gov (opens in a new tab)

What this source covers

Open the current rules and check the river section, season, and special limits.

Fishing rulesOfficial agencyNH Fish and Game trout fishingwildlife.nh.gov (opens in a new tab)

What this source covers

Open the current rules and check the river section, season, and special limits.

Flow and weather

Check the latest river reading and forecast before you leave.

SafetyOfficial agencyNational Weather Service forecast pointforecast.weather.gov (opens in a new tab)

What this source covers

Open this page and check the latest safety advice before your trip.

River readingOfficial agencyUSGS Sugar River at West Claremont 01152500waterdata.usgs.gov (opens in a new tab)

What this source covers

Open this river reading to check the latest level, flow, and update time.

Access and land

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

Public accessOfficial agencyNH Fish and Game where-to-fish access resourceswildlife.nh.gov (opens in a new tab)

What this source covers

Open the land or access page, then check signs before you park or enter.

Quick questions

What should I check first before fishing the Sugar River?

Check the USGS West Claremont gauge, rainfall, NH rules, stocking updates, weather, and water temperature.

Are there special fishing rules on the Sugar River?

Use current NH freshwater and trout rules because seasons and stocked-trout details can change.

What flies should I bring for the Sugar River?

Bring the hatch-chart flies, a few confidence nymphs, and a streamer or warmwater box that matches the river's species. Then adjust for water temperature, clarity, and the insects or baitfish you actually see.

Can I wade the Sugar River?

Yes in some reaches at normal flows, but access is patchy and the river can rise quickly after rain.

When should I skip the Sugar River?

Skip it when flows are unsafe, water is too warm for trout, emergency closures are active, or legal access for the reach is not clear.

Sugar River

Check the water temperature first.

If you go