Northeast
Monocacy River
Live Conditions
Monocacy River — At Jug Bridge near Frederick
7-Day Flow
→ Stable
24-Hr Pressure
29.97 inHg · → High/stable
Local Weather
Normal conditions
Today
☁️Overcast
65° / 40°
Tomorrow
☁️Overcast
65° / 42°
Tue
☁️Overcast
69° / 42°
Wed
🌦️Drizzle
72° / 46°
0.04"
Cold front incoming — go deep with nymphs, surface activity likely slow.
Weather by Open-Meteo · No API key · Updated every 30 min
What should I fish today?
⚡ AIAI-powered recommendation using today's live flow, temperature, and hatch data.
9
Time of Day
Using: 159 CFS · BWOs and Midges. Limited holdover survives.
What should I pack?
Rod, flies, tippet, and safety gear specific to today's Monocacy River conditions.
🪰 Hatch Calendar
Monocacy River · November · Late Fall
Showing typical dates — water temperature data unavailable for live hatch predictions.
Select month
BWOs and Midges. Limited holdover survives.
River Map
About Monocacy River
The Monocacy River is a major Potomac tributary flowing through Frederick County, primarily a warmwater fishery but receiving trout stocking in select upper sections during the spring season. Early-season fly fishers working tributary mouths and spring-fed pool tailouts can find freshly stocked rainbows and browns before temperatures rise.
Regulations
Standard Maryland statewide trout regulations apply. Trout stocking is a spring put-and-take program; fish do not persist through summer in the main stem. Trout season opens the last Saturday in March; 5-fish daily creel, 7-inch minimum. Check Maryland DNR for current year stocking locations — this is primarily a warmwater fishery by May.
Learn More
Guides to help you fish Monocacy River with more confidence.
Maryland Fishing Regulations for Fly Anglers
Maryland nontidal fishing license, the separate Trout Stamp required statewide, the last Saturday in March opener, the Gunpowder Falls 7.2-mile…
Trout Species of Maryland
MD's wild brown trout fishery — the famously selective Gunpowder Falls below Prettyboy, the Trophy Trout Savage tailwater, the North Branch Potomac…
How Barometric Pressure Affects Fishing (And How to Use It)
That gorgeous bluebird day after a cold front? Worst fishing of the year. Here's the data behind why pressure changes matter more than the weather…