Merrimack River (MA/NH)

Lake Atlantic tributary · Gauge: Merrimack River below Concord River at Lowell, MA

Current Conditions

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Water Temp

8,100

Flow (cfs) · steady

44.29ft

Gage Height

Reading: 6/5/2026, 9:30:00 PM

Run status

Atlantic Salmon

Confidence: 53%

NOT YET

Why this status?

Phase: ramp_up. Water n/a°F (ideal 50-62), flow 8100 cfs (ideal 2000-15000). 0 reports in last 24h (weighted 7d: 0.00, trust-adjusted). Window/Temp/Flow/Reports scores: 0.60/0.50/1.00/0.17 → total 0.53.

Striped Bass

Confidence: 51%

NOT YET

Why this status?

Phase: ramp_down. Water n/a°F (ideal 55-68), flow 8100 cfs (ideal 2000-15000). 0 reports in last 24h (weighted 7d: 0.00, trust-adjusted). Window/Temp/Flow/Reports scores: 0.55/0.50/1.00/0.17 → total 0.51.

Recent reports

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Typical run windows

Atlantic Salmon 05-15 → peak 06-30 → 08-15

Ideal: 50-62°F · 2,000-15,000 cfs

Atlantic salmon restoration.

Striped Bass 05-01 → peak 06-01 → 09-30

Ideal: 55-68°F · 2,000-15,000 cfs

Merrimack striped bass run.

Status is computed from real-time USGS gauge data, historical run windows, DNR reports, and crowdsourced angler reports. Always confirm conditions with the latest DNR rules before fishing.