Chasm Lake

Boulder 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 Chasm 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

Sat · Sep 12, 4 AM → 8 AM (America/Denver)

Full read

The latest cached fishing-weather read for Chasm Lake in Boulder 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 7 mph out of the southwest, gusting to 22 mph; surface pressure near 701 hPa on a rising trend; 0.00 inches of rain; and air temperature near 48 °F with overcast dominant. Confidence in this cached read is medium; it was generated September 10, 2026, 1:17 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, 1:17 PM UTCBUCKET 2026-09-10ENGINE 0.7.0

Conditions at a glance

Wind
7mph

SW · gust 22

Rain / Weather
0in

Overcast

Temp
48°F

9°C · hum 21%

Pressure
20.70inHg

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
    63° / 41°F
    13 mph · SWgust 30
    0.00 in
    ↓ -10.1 hPa
  2. Fri · Sep 11
    6 PM → 10 PM
    SKIP
    Extreme gusts
    63° / 46°F
    7 mph · Wgust 37
    0.02 in
    ↓ +0.7 hPa
  3. Sat · Sep 12
    4 AM → 8 AM
    MAYBE
    A front passing through
    68° / 46°F
    7 mph · Wgust 19
    0.00 in
    ↓ +0.3 hPa
  4. Sun · Sep 13
    4 AM → 8 AM
    MAYBE
    A front passing through
    70° / 46°F
    8 mph · Wgust 34
    0.02 in
    ↓ -3.7 hPa
  5. Mon · Sep 14
    4 AM → 8 AM
    MAYBE
    A front passing through
    64° / 43°F
    7 mph · Wgust 27
    0.12 in
    ↑ +9.2 hPa
  6. Tue · Sep 15
    4 AM → 8 AM
    MAYBE
    A front passing through
    63° / 43°F
    4 mph · SEgust 21
    0.12 in
    ↓ +1.8 hPa
  7. Wed · Sep 16
    5 AM → 9 AM
    MAYBE
    A front passing through
    61° / 39°F
    7 mph · Wgust 14
    0.08 in
    ↑ +7.7 hPa

Last 3 days

Recent context — what just happened

Pressure
Rising
+12.6 hPa over 72h
Rain
Dry stretch
0.00 in totallast 72h
Wind
Gusty
12 mph · gust 56 · SW
Temperature
Cooler
-8.5°F over 72h64–43°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.