Poison Lake

Larimer County, CO

MAYBEConfidence · Medium
Best bite window
The highlighted window has passed. This read is still based on the latest cached weather; use the 7-Day forecast below for the next window.
Main reason
dry conditions across the window
Main risk
a front passing through

MAYBE on Poison Lake — light winds and rising pressure after a passing system for this window. Watch a front passing through. Weather-only read (no on-water history calibrating this yet).

Next forecast window
MAYBE

Fri · Sep 11, 4 AM → 8 AM (America/Denver)

Full read

The latest cached fishing-weather read for Poison Lake in Larimer County, CO is MAYBE. Its highlighted window has passed, so use the 7-day forecast below for the next available window. The main factor in its favor was dry conditions across the window, while the main watch-out was a front passing through. Its cached forecast evidence included wind near 3 mph out of the south, gusting to 11 mph; surface pressure near 844 hPa on a rising trend; 0.00 inches of rain; and air temperature near 68 °F with clear dominant. Confidence in this cached read is medium; it was generated September 10, 2026, 1:25 PM UTC, and reads refresh on a daily cadence. This is a weather-only read built from forecast weather; it does not yet use on-water reports, and confidence is capped until local water data or feedback exists.

UPDATED September 10, 2026, 1:25 PM UTCBUCKET 2026-09-10ENGINE 0.7.0

Conditions at a glance

Wind
3mph

S · gust 11

Rain / Weather
0in

Clear

Temp
68°F

20°C · hum 21%

Pressure
24.92inHg

Rising

7-Day Fishing Forecast

One read per day — the bite call, the window, the weather behind it

  1. Thu · Sep 10
    Window passed
    MAYBE
    A front passing through
    86° / 54°F
    3 mph · Sgust 16
    0.00 in
    ↓ -10.1 hPa
  2. Fri · Sep 11
    4 AM → 8 AM
    MAYBE
    A front passing through
    88° / 64°F
    6 mph · NWgust 29
    0.00 in
    ↓ +0.5 hPa
  3. Sat · Sep 12
    4 AM → 8 AM
    MAYBE
    A front passing through
    82° / 57°F
    4 mph · Wgust 13
    0.02 in
    ↓ +1.0 hPa
  4. Sun · Sep 13
    4 AM → 8 AM
    MAYBE
    A front passing through
    93° / 61°F
    6 mph · Wgust 25
    0.02 in
    ↓ -3.9 hPa
  5. Mon · Sep 14
    4 AM → 8 AM
    MAYBE
    A front passing through
    86° / 59°F
    7 mph · Wgust 19
    0.18 in
    ↑ +10.0 hPa
  6. Tue · Sep 15
    4 AM → 8 AM
    MAYBE
    A front passing through
    75° / 59°F
    3 mph · Sgust 13
    0.27 in
    ↓ +1.8 hPa
  7. Wed · Sep 16
    8 AM → 12 PM
    MAYBE
    A front passing through
    72° / 54°F
    4 mph · NEgust 8
    0.12 in
    ↑ +7.6 hPa

Last 3 days

Recent context — what just happened

Pressure
Rising
+13.3 hPa over 72h
Rain
Dry stretch
0.00 in totallast 72h
Wind
Calm wind
7 mph · gust 23 · S
Temperature
Cooler
-5.6°F over 72h90–57°F range

Weather-only read. Confidence is capped until local water data or feedback exists.

Nearby waters

Weather data by Open-Meteo — CC BY 4.0. Fishing Weather derives the fishing read.