New Hampshire
Souhegan River at Merrimack
Location Snapshot
Souhegan River at Merrimack is a southern New Hampshire tributary approaching the Merrimack River through a mixed suburban and wooded corridor. Brown and rainbow trout provide the principal coldwater opportunity in managed reaches.
Current River Rating
Fair · 86
Conditions are mixed. Review the details below before heading out.
Scores are model-specific and are not directly comparable across water types.
Partial water evidence · Medium confidence
Should I Go?
Wait
Timing Outlook
This timing outlook is informational only; current river conditions remain Fair.
Why
- Very clear skies may make trout more cautious in shallow water.
- Water temperature is unavailable.
Favorable Factors
- Recent precipitation has been light.
Timing Evidence
Dusk low light is favorable.
Current Readings
- Flow
- 115 CFS
- Gage Height
- 2.77 ft
- Water Temperature
- Not available
- Observation Time
- Oct 21, 2026, 11:30 AM
Updated recently · USGS station 01094000 · Direct monitoring location
Readings from past 7 Days
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Historical readings are provided for context. Readings outside the current freshness window are not used to rate current conditions.
Better Nearby Options
Checking nearby StrikeTracks waters…
Preliminary guidance only. Always assess current weather, access, water depth, current speed, and your own ability before entering the river.
Changing Conditions Advisory
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Weather Near Gauge
Current Weather
Clear
Temperature
40°F
Feels like
34°F
Wind
5 mph N
Wind gust
13 mph
Current precipitation
0.00 in
Updated
Oct 21, 2026, 8:00 AM
Recent Rainfall
Estimated precipitation near this gauge
Last 6 hours
0.00 in
Last 24 hours
0.00 in
Last 48 hours
0.00 in
Little recent rainfall near this river.
Next 24 Hours
Wed 9 AM
Clear
Temp 45°F
Chance 0%
Precip 0.00 in
Wind 8 mph
Wed 1 PM
Clear
Temp 57°F
Chance 0%
Precip 0.00 in
Wind 8 mph
Wed 5 PM
Clear
Temp 57°F
Chance 0%
Precip 0.00 in
Wind 6 mph
Wed 9 PM
Overcast
Temp 43°F
Chance 0%
Precip 0.00 in
Wind 4 mph
Thu 1 AM
Overcast
Temp 39°F
Chance 0%
Precip 0.00 in
Wind 5 mph
Thu 5 AM
Overcast
Temp 38°F
Chance 0%
Precip 0.00 in
Wind 5 mph
Four-Day Forecast
Wed, Oct 21
Overcast
High 58°F / Low 38°F
Chance 0%
Precip 0.00 in
Max gust 19 mph
Thu, Oct 22
Overcast
High 63°F / Low 37°F
Chance 1%
Precip 0.00 in
Max gust 35 mph
Fri, Oct 23
Clear
High 56°F / Low 36°F
Chance 1%
Precip 0.00 in
Max gust 22 mph
Sat, Oct 24
Overcast
High 60°F / Low 36°F
Chance 1%
Precip 0.00 in
Max gust 10 mph
Weather and rainfall are estimated for this river's coordinates. Local conditions can vary, especially in mountainous terrain and during isolated storms.
Recent rainfall can influence river flow, but the timing and magnitude depend on watershed size, soil conditions, upstream reservoirs, and dam releases.
Weather data: Open-Meteo
Historical Flow
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Fishing Overview
Brown and rainbow trout are stocked in the Souhegan River at Merrimack, along with brook trout.
Fishery Profile
Documented species you may encounter at Souhegan River.
Species images are AI-generated illustrations for visual reference and may simplify natural variation. Fishery records are based on the cited agency sources. About fish illustrations
Target species
Brown Trout
Salmo trutta
- Expectation
- Primary
- Population
- Stocked
- Native status
- introduced
- Confidence
- High confidence
Stocked · Spring, FallSpring, Fall
Rainbow Trout
Oncorhynchus mykiss
- Expectation
- Primary
- Population
- Stocked
- Native status
- introduced
- Confidence
- High confidence
Stocked · Spring, FallSpring, Fall
Brook Trout
Salvelinus fontinalis
- Expectation
- Common
- Population
- Unknown
- Native status
- native
- Confidence
- Medium confidence
Fishery characteristics
- Composition
- Stocked
- Great Lakes tributary
- No
- Flow regime
- Natural flow
Best seasons
- Spring
- Summer
- Fall
Common techniques
- Fly fishing
- Nymphing
- Shore fishing
- Spinning
Stocking information
- Stocked · Spring, Fall
Brown Trout
Stocked · New Hampshire Fish and Game Department
- Stocked · Spring, Fall
Rainbow Trout
Stocked · New Hampshire Fish and Game Department
Official sources
Hatch Match
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Location and Access
USGS monitoring location
New Hampshire
The map marker represents the cataloged waterbody or monitoring location and may not indicate legal parking or public access. Confirm access through the official information before visiting.
Access, Parking, and Regulations
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