Androscoggin River
Errol · Lake Umbagog · Trophy Water
N New Hampshire, USA
Open live forecast →Target species: Atlanticsalmon, Brown, and Brook.
Stream gauge: 01053500. Flow and water temperature update on every refresh.
Weekly AI Outlook as of 06/05/26
At 2090 cfs, the Androscoggin is running higher than ideal but still fishable through the trophy sections. No recent shop intel — outlook based on current conditions. American Grannom caddis are hitting peak emergence this month, with water temps climbing through the sweet spot for sustained hatches. Focus subsurface early, then watch for caddis activity during the warmer afternoon windows. The cooling trend mid-week may actually improve fishing by reducing thermal stress on trout.
- Flow: 2090 cfs — elevated but manageable. Wade carefully and target deeper pools where browns and brookies hold in higher water.
- Hatches: Peak Grannom caddis emergence. Elk Hair Caddis #14-16 and X-Caddis producing. Watch for afternoon activity as temps climb.
- Water Temp: Mid-50s climbing toward optimal 60°F zone. Perfect range triggering consistent caddis emergence and active feeding.
- Best Window: 2pm-6pm as afternoon warming triggers caddis. Morning nymphing productive before surface activity kicks in.
Generated weekly from live USGS gauge readings, weather forecasts, and recent fly shop reports. Updates Friday mornings.
About this Water
- Freestone
- Best months: May–Oct, peak May–June and Sept
The Androscoggin River runs from Lake Umbagog in northwestern Maine through New Hampshire's Northern Country and on to the Atlantic in Brunswick. The upper Androscoggin in the Errol, NH area is the most productive trout water — cold flows out of Umbagog support landlocked salmon and brook trout, with brown trout in select reaches. The river is wadeable through the Errol stretch with classic Northern Forest character. Hatches are reliable: Hendrickson and March Brown in spring, caddis through summer.
The Androscoggin's headwaters in Lake Umbagog hold one of New England's largest remaining native landlocked salmon populations — fish that drop down into the upper river to feed each spring and fall.
January Outlook
January on the Androscoggin River in the White Mountains region is deep winter. The river flows through the notches between NH and ME with cold-weather conditions. Atlantic salmon restoration is ongoing — the primary fishery is brown and brook trout.
Productive Patterns
- Zebra Midge
- RS2
- Hare's Ear
- Soft Hackle Midge
Tips
January fishing on the Androscoggin requires winter commitment. The river valley in winter along US-2 through the notch country is spectacular. Fish the deeper pools and runs for the wild brown trout. Check NH Fish & Game for any special regulations in the Atlantic salmon restoration areas.
Water Notes
Water 34–42°F. Cold White Mountains winter. NH-ME state line section. Check regulations carefully.
February Outlook
February on the Androscoggin is the quietest month. Cold and snowy in the White Mountains. Midges and small nymphs for the most dedicated anglers.
Productive Patterns
- Zebra Midge
- Baetis Nymph
- RS2
- Soft Hackle
Tips
February is a planning month for most Androscoggin anglers. The river is accessible along US-2 but conditions are harsh. The brown trout are present and catchable for those willing to brave the cold.
Water Notes
Water 36–44°F. White Mountain winter. Ice margins possible. Roads maintained on US-2.
March Outlook
March brings the first signs of spring to the Androscoggin. Early Baetis hatches begin on warmer afternoons. Pre-runoff conditions offer good water clarity before snowmelt peaks.
Productive Patterns
- Baetis Nymph
- RS2
- Hare's Ear
- Soft Hackle
Tips
March is an excellent early-season window on the Androscoggin. The pre-runoff clarity and first returning hatches make this a productive month for the dedicated spring angler. White Mountain scenery is spectacular with snowcapped peaks.
Water Notes
Water 40–52°F. Pre-runoff. Spring approaching. Early Baetis on warm afternoons. Snowmelt pending.
April Outlook
April on the Androscoggin can be high runoff as White Mountain snowmelt peaks. Caddis and early Hendrickson hatches begin by mid-April on good years. Pre-runoff early April can be excellent.
Productive Patterns
- Hendrickson #12-14
- Little Black Caddis
- Baetis Dry
- Hare's Ear
Tips
Early April before peak runoff can offer excellent fishing. The White Mountain rivers typically peak in late April–May. Fish early April before the snowmelt surges. The gradient sections provide good holding water in higher flows.
Water Notes
Water 46–58°F early April. Runoff peaks late April into May. Monitor USGS 01054200.
May Outlook
May on the Androscoggin sees high runoff receding. By late May conditions typically improve dramatically. Caddis, March Brown, and Sulphur hatches begin as flows drop.
Productive Patterns
- March Brown #10-12
- Elk Hair Caddis
- Sulphur #16
- Soft Hackle
Tips
Late May is prime time as the Androscoggin recedes from peak runoff. The White Mountains region is spectacularly green. Caddis hatches are excellent once flows subside. Fish the gradient sections with pocketwater tactics.
Water Notes
Flows dropping through May. Water 50–62°F. Clearing by late May. Caddis and March Brown excellent once flows drop.
June Outlook
June is the Androscoggin River's prime month. Caddis, Sulphur, and PMD hatches are excellent. Wild brown and brook trout are actively feeding throughout the day.
Productive Patterns
- PMD Dry
- Elk Hair Caddis
- Sulphur #16
- Stimulator
Tips
June is the Androscoggin at its finest. The White Mountain setting is spectacular with the full-leaf deciduous canopy. Multiple hatches produce excellent dry fly fishing. Fish the New Hampshire sections for the most consistent access.
Water Notes
Water 56–66°F. Excellent conditions. Flows stable. White Mountains in full early summer.
July Outlook
July on the Androscoggin is summer with terrestrials and evening caddis. The White Mountain backdrop is spectacular. Morning and evening fishing is most productive.
Productive Patterns
- Hopper
- Ant
- Evening Caddis
- PMD
Tips
July is terrestrial season on the Androscoggin. Fish morning and evening. The gradient sections provide good oxygenation even in summer. Wild brown and brook trout in excellent condition.
Water Notes
Water 62–70°F. Summer. Fish early morning and evening. Gradient sections stay cooler.
August Outlook
August on the Androscoggin is late summer with terrestrial patterns continuing. Trico spinner falls in slow sections. Evening caddis excellent.
Productive Patterns
- Hopper
- Trico Spinner
- Evening Caddis
- Beetle
Tips
August evening caddis hatches on the Androscoggin can be spectacular. The White Mountain rivers cool quickly at night. Brook trout in the tributary streams are excellent in August.
Water Notes
Water 64–70°F. Late summer. Evening best. Tributary brook trout streams excellent.
September Outlook
September is one of the finest months on the Androscoggin. BWO hatches return, temperatures cool, and the White Mountain fall color is among the most spectacular in New England.
Productive Patterns
- Baetis Dry
- Elk Hair Caddis
- Soft Hackle
- Hopper
Tips
September on the Androscoggin with White Mountain fall color as backdrop is extraordinary. Baetis hatches return and the wild trout are actively feeding. Brook trout in the upper sections are beautiful in pre-spawn condition.
Water Notes
Water 54–62°F. Falling temps. Excellent clarity. White Mountain fall color beginning.
October Outlook
October on the Androscoggin is peak fall color in the White Mountains — one of the most photographed landscapes in New England. Baetis hatches and pre-spawn brook and brown trout activity make this a prime fishing month.
Productive Patterns
- BWO Parachute
- Streamer
- Hare's Ear
- Egg Pattern
Tips
October on the Androscoggin is extraordinary. Peak White Mountain foliage combined with excellent Baetis hatches and aggressive pre-spawn trout. This is one of New England's finest fall fly fishing settings.
Water Notes
Water 46–54°F. Peak fall color White Mountains. Excellent conditions. Pre-spawn trout.
November Outlook
November on the Androscoggin is late fall. Midge and Baetis hatches continue on warmer days. The mountains are stripped of leaves and spectacular.
Productive Patterns
- Zebra Midge
- BWO Nymph
- RS2
- Soft Hackle
Tips
November is a quiet and productive month on the Androscoggin. Post-spawn brook and brown trout are recovering and feeding. The White Mountains in late fall have a stark, beautiful character.
Water Notes
Water 40–50°F. Late fall. White Mountains heading into winter. Roads maintained on US-2.
December Outlook
December on the Androscoggin is winter in the White Mountains. Cold conditions but accessible via US-2. Midge fishing for dedicated winter anglers.
Productive Patterns
- Zebra Midge
- RS2
- Soft Hackle Midge
- Hare's Ear
Tips
December fishing requires full winter gear but the Androscoggin holds fish year-round. The White Mountain notch country in early winter is spectacularly remote. Check NH Fish & Game for any winter closure areas.
Water Notes
Water 34–42°F. White Mountain winter. US-2 maintained. Cold but accessible.
Hatch Calendar
| Insect | Peak | Active | Size | Productive Patterns |
|---|---|---|---|---|
| Hendrickson Ephemerella subvaria |
May | Apr, May | #12–14 |
|
| Caddis (American Grannom) Brachycentrus spp. |
May, Jun | Apr, May, Jun, Jul, Aug, Sep | #14–16 |
|
| Blue Winged Olive Baetis tricaudatus |
May, Oct | Mar, Apr, May, Sep, Oct, Nov | #18–20 |
|
Access & Approach
Errol, NH is the main base. Multiple wade access points along Route 16. New Hampshire or Maine fishing license required (depending on section). Special regulations on portions — check current rules.
Nearby Fly Shops
- Mainely Fly Fishing
Regulations & License
Fishing in New Hampshire requires a current license. Always verify season dates, bag limits, and any special-regulation waters before you fish.
New Hampshire fishing regulations & license →
Nearby Waters
Closest Waters
About Current
Androscoggin River conditions on Current combine real-time flow data (USGS, WSC, CDEC, CEHQ), weather, tide predictions, hatch probabilities calibrated to this specific water, and recent fly shop reports from the area.
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