Wade · Best fit74/100
Wading is in play only where your chosen access has clear footing, legal entry, and no forced crossings.
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Fly fishing report · Northeast
Merrimack River
A Merrimack River report for Franklin Junction and central New Hampshire planning, with flow, mixed-species tactics, access, and regulations.
Check flow & weatherToday's fishing decisionMost live data available
74
Go now
Merrimack River looks fishable right now.
Current USGS flow is 662 cfs and has been stable for about 6 hours. Today's flow is unusually low for this date and below the usual low-water marker near 700 cfs. Low water can make fish spooky, warm, pressured, or concentrated; check temperature and handling risk.
Best supported approachWade
Watch nextFlow: Current USGS flow is 662 cfs and has been stable for about 6 hours. Today's flow is unusually low for this date and below the usual low-water marker near 700 cfs.
Updated Aug 3, 12:48 AM UTCUsually refreshes about every 45 minutes
Best supported approachWade
Compare wading, bank fishing, and floating before choosing how you will fish.
Bank / edge74/100
Bank and edge fishing remains a practical low-commitment option if access is legal and footing is safe.
Float74/100
A float is in play where this report supports boat access and wind, releases, and shuttle logistics are manageable.
Check before you drive
Current flow and weather.
Look at whether the river is rising or falling, then check wind, rain, and storms. These can change both safety and fishing.
Loading current flow and weather.
Before you rely on this report
How current is this report?
Conditions can change quickly. Check these dates before you decide to fish, and open the official source when safety or rules matter.
- River conditions
- Checked Aug 2, 2026, 8:48 PM
- Fishing guidance
- Reviewed Jul 6, 2026
- Public access
- No reviewed map pin available
- Rules and closures
- Official rule links checked
High confidence in the current score inputs.
8 sources are listed below for you to open.
3 public access records are listed. Private spots are never shown.
Source checked Jul 30, 2026
Plan your access
Know where you can enter.
These are public parking, launch, trail, or recreation areas—not secret fishing spots. We never show an angler's private pins, notes, or photos here.
- 0
- Shown on map
- 3
- No map pin
Location checkedDescription only
01No map pin
Area description
Franklin Junction gauge reach
Primary flow reference for upper Merrimack planning.
Restrictions and seasonal notes
The Merrimack has public launches and parks, but legal wade access is reach-specific.
Urban and dam-influenced reaches can change quickly. Avoid fishing below structures without checking safety.
02No map pin
Area description
Concord corridor
Mixed warmwater fly-fishing with larger-river access decisions.
Restrictions and seasonal notes
The Merrimack has public launches and parks, but legal wade access is reach-specific.
Urban and dam-influenced reaches can change quickly. Avoid fishing below structures without checking safety.
03No map pin
Area description
Manchester and lower reaches
More urban, warmwater, and access-specific planning.
Restrictions and seasonal notes
The Merrimack has public launches and parks, but legal wade access is reach-specific.
Urban and dam-influenced reaches can change quickly. Avoid fishing below structures without checking safety.
How to fish it
Separate coldwater trout windows from warmwater river fishing.
The Merrimack is a broad river, not a small trout stream. Around Franklin it can offer coldwater windows and mixed fishing, while downstream reaches often make more sense for smallmouth and larger-river streamer tactics.
- Use the Franklin Junction flow before planning a wade or float.
- Bring trout flies for cool water and bass streamers or poppers for warmer reaches.
- Look for soft seams, ledges, islands, and bank structure instead of featureless current.
- Use NH rules and local access information for the exact reach you fish.
Why the score looks this way
FlowUse caution
USGS shows 662 cfs with a stable over about 6 hours trend. Today's flow is unusually low for this date and below the usual low-water marker near 700 cfs. Low water can make fish spooky, warm, pressured, or concentrated; check temperature and handling risk.
SeasonHelps score
Early summer: Caddis, smallmouth movement, and better wade/boat windows.
WeatherHelps score
The NWS forecast is about 77F with Cloudy.
Public alertsHelps score
No active NWS alert was returned for this forecast point.
Fishing usefulnessHelps score
Skip wading when the river is high, rising, cold and pushy, dam-influenced, or warm enough that trout handling is poor. Switch targets or choose smaller water.
Read the water
What changes the plan.
A stable-flow day with moderate temperatures gives the most options. High water makes wading risky, and summer heat should push anglers toward smallmouth, shaded margins, or a colder trout stream.
Moderate flow
Fish seams, ledges, island tails, and bank soft water.
High flow
Do not force wading; fish protected edges or use a boat plan only if safe.
Warm water
Target bass and warmwater species instead of trout.
Clear low water
Use longer casts, smaller streamers, and low-profile approaches.
Your trip plan
Know when to go—and when to skip it.
Best flows
Use RiverReports and USGS 01081500 at Franklin Junction for the upper-river trend, then match that reading to the exact reach, dam influence, boat traffic, and wind.
When to skip
Skip wading when the river is high, rising, cold and pushy, dam-influenced, or warm enough that trout handling is poor. Switch targets or choose smaller water.
Local plan
Start at the Franklin flow, check NH rules and weather, then decide whether to fish trout seams, smallmouth ledges, bank structure, or a boat-access reach.
Backup water
If the Merrimack is too high, warm, windy, or access-complicated, compare Mascoma, Saco, or Androscoggin depending on whether trout or warmwater fishing is the goal.
Hatches & flies
Bring a flexible box.
TimingWhat to watchUseful flies
April to MayEarly trout hatches, baitfish movement, crayfish, and warming smallmouth flatsBWO emerger, caddis pupa, small Clouser, crayfish, black bugger
Fly family · report suggests “BWO emerger”Blue-Winged Olive PatternsBWO describes a hatch group, not one fly. Nymph, emerger, dry, cripple, and spinner profiles must stay separate because they occupy different parts of the water column.See family guide ↗
Fly family · report suggests “caddis pupa”Caddis Pupa PatternsCaddis pupa is a life-stage family. Curved bodies, wing pads, legs, beads, and soft-hackle collars differ among exact patterns and must be labeled.See family guide ↗+ 3 more reviewed guides in the Fly Box June to AugustCaddis, damselflies, dragonflies, hoppers, minnows, crayfishPoppers, sliders, foam hopper, damselfly nymph, baitfish streamer
Fly family · report suggests “Poppers”Bass and Panfish Popper PatternsPoppers may use cupped foam, cork, balsa, deer hair, or pencil-shaped heads. Head face, size, buoyancy, tail, legs, and weed guard determine sound and action; a generic popper label does not identify one fly.See family guide ↗
Fly family · report suggests “sliders”Warmwater Slider and Diver PatternsA slider has a tapered, flat, or softly shaped head that glides or pushes a small wake with limited noise. A diver has an angled, collared, folded, or otherwise shaped head that pulls below the surface when stripped and rises on the pause. Frog, baitfish, and large-insect profiles can be tied on either idea, so the exact head action, buoyancy, hook orientation, weed guard, and material must stay named.See family guide ↗+ 3 more reviewed guides in the Fly Box September to OctoberCooling-water baitfish, late caddis, crayfish, fall streamer windowsClouser, small game changer, crayfish, soft hackle, small leech
Fly pattern · report suggests “Clouser”Clouser Deep MinnowThe reviewed chartreuse-and-white form uses sparse layered bucktail with flash around lead barbell eyes. The eyes make the fly sink between strips and ride hook point up; color, eye weight, hook, and saltwater materials must remain labeled.See photos & how to fish it ↗
Fly pattern · report suggests “small game changer”Chocklett's Game ChangerConfirm a connected series of articulated shanks or Fish-Spine sections dressed into one continuous baitfish taper, with the greatest body bulk near the front hook and progressively less material toward the tail. The two photographs show that architecture in large chartreuse-white and gray-white field forms, but they do not establish one universal section count, hook, head, length, material, or sink rate. A single hinge, a two-hook articulated streamer, and any generic jointed swimbait fly are not automatically Chocklett's Game Changers.See photos & how to fish it ↗+ 3 more reviewed guides in the Fly Box Cold monthsLimited surface feeding; slower holes and warm afternoons matter mostSlow leech, jig streamer, small baitfish, nymph under indicator
Fly family · report suggests “Slow leech”Leech PatternsLeech patterns share an elongated moving silhouette, but material, weighting, hook orientation, and retrieve vary. Pine-squirrel, rabbit-strip, balanced, and Woolly Bugger forms remain separately labeled rather than being presented as one recipe.See family guide ↗
Fly family · report suggests “jig streamer”Trout Streamer PatternsStreamer is a method-and-silhouette family, not a recipe. Size, color, weight, and presentation phrases stay visible, while baitfish, leech, sculpin, Woolly Bugger, and articulated identities link to their more specific destinations when known.See family guide ↗+ 1 more reviewed guide in the Fly Box 01
Use the Franklin gauge for upper-river planning, then inspect the actual reach before wading.
02
For trout windows, fish current seams with nymphs, soft hackles, and small streamers.
03
For smallmouth, work ledges, bridge shade, islands, and rocky banks with crayfish and baitfish flies.
04
Use poppers and sliders early or late in summer, then switch to subsurface flies in bright sun.
05
Avoid wading broad pushy current when a bank or boat plan is safer.
Rules & closures
Check the official rules before you go.
Open the agency page to confirm the exact river section, species, season, tackle rules, limits, and emergency closures.
Official links checkedRules for this river or sectionNo special rule found
We did not find a special rule for this river.
We checked the state source but did not find a clearly supported exception for this river. Check the official rules for the exact section you plan to fish.
Rules checkedJul 30, 2026
Report a correction ↗Always follow the official rule
This summary helps with trip planning. The linked agency rule is the one you must follow.
Updates from anglers
What anglers are seeing.
Recent observations from general areas of Merrimack River. We review every update before it appears and never publish exact fishing spots, private access details, or photo locations.
Angler updates are not loading right now.
You can still use the river plan above. Check back later for recent observations from other anglers.
Where this report comes from
Open the sources we checked.
Fishing guidance checked: Jul 6, 2026
Site check: Jul 14, 2026. We regularly test report links, live scores, flow and weather data, and page loading. The content date changes only when the fishing guidance or its sources change.
flowRiverReports Merrimack River at Franklin JunctionflowUSGS Merrimack River at Franklin Junction 01081500regulationNew Hampshire freshwater fishing digestregulationNH Fish and Game fishing seasonsregulationNH Fish and Game trout fishinginventoryNH Fish and Game stocking reportsafetyNational Weather Service forecast pointaccessNH Fish and Game where-to-fish access resources
Common questions
Before you leave.
What should I check first before fishing the Merrimack River?+
Check RiverReports or USGS at Franklin Junction, water temperature, NH rules, weather, and the exact access point.
Are there special regulations on the Merrimack River?+
Yes. Rules depend on species and reach, so use the current NH freshwater digest.
What flies should I bring for the Merrimack 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 Merrimack River?+
Some sections can be waded at moderate flows, but the Merrimack is big water. Use the gauge and avoid unsafe crossings.
When should I skip the Merrimack 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.