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Maine

Flagstaff Lake

Covering roughly 17,377 acres in Somerset County, Maine, Flagstaff Lake is a year-round largemouth water with strong seasonal swings.

Surface
17,377acres
Primary species
Largemouth
§ 01Today on the water · Flagstaff Lakevia Open-Meteo · 16:15 local
Air temp
74.7°F
Barometric
29.77″
↓falling 24h(-0.14)
Wind
9mph
from S
Moon
Waxing Crescent
day 4.0 · 17% lit

Air conditions sampled near the lake center, not measured on the water · refreshed ~15 min

§ 03Next 3 daysvia Open-Meteo · interpretation
  1. 18
    julSat

    Stable window

    hi 75° · lo 55°

    Anytime through the day. Quiet weather day; lean on seasonal pattern and structure.

    ── light sw wind

  2. 19
    julSun

    Watch the wind

    hi 70° · lo 57°

    Lean into wind-fed shorelines, all day. Wind drives bait position today; pick the shoreline taking it.

    ── stiff w wind

  3. 20
    julMon

    Stable window

    hi 76° · lo 51°

    Anytime through the day. Quiet weather day; lean on seasonal pattern and structure.

    ── light w wind · settled

§ 04Field notesMaine

Where it is

Flagstaff Lake sits in Somerset County, Maine, covering about 17,377 acres. Productive zones shift through the year more than the lake outline suggests.

Seasonal pattern

Spring. Warming water pulls largemouth toward shallow, protected areas where they stage and spawn; the quickest-warming pockets lead.

Summer. Heat pushes fish off the shallows toward depth and shade; work the cooler ends of the day.

Fall. As water cools, forage and bass return toward shallower water; movement is wide, so covering water pays.

Winter. Cold water settles fish deep and slow; patience and a subtle presentation are the more dependable choice.

Key structure

  • Creek and cove mouths that funnel fish and bait
  • Weed edges and the clean lines along them
  • Inside turns where a bank changes angle
  • Submerged wood, brush, and laydown cover

The calendar decides which of these is worth time on a given day.

Forage

Largemouth on Flagstaff Lake hunt baitfish and panfish along cover; forage and weather drive the day's bite.

Access

Public access points serve Flagstaff Lake; verify ramp conditions and lake levels before setting out.

Regulations

Check current state and local regulations before fishing; limits and seasons can change.

§ 05Sources & field guides

Field guides

Data & references

  • Today's conditions — Open-Meteo, refreshed every ~15 min
  • Moon phase — local astronomical calculation, no external API
  • Lake area, depth, structure — Identity, surface area, coordinates and county/state are from the ProjectD canonical waterbody index (snapshot conus-20260518-v1, group gnis:00566271). Maximum depth and regulation links were not available from an acceptable source and are intentionally omitted.
  • Regulations — verify current state and local regulations before fishing

Last revised · Back to Lake Guide