Chasm Lake

Boulder County, CO

MAYBEConfidence · Low
Best bite window
Thu · Jul 23, 3 PM → 7 PM (America/Denver)
Main reason
dry conditions across the window
Main risk
a front passing through

MAYBE on Chasm Lake — light winds and dry conditions across the window for this window. Watch a front passing through. Weather-only read (no on-water history calibrating this yet).

Full read

The current fishing-weather read for Chasm Lake in Boulder County, CO is MAYBE, with the best four-hour window on Thu, Jul 23 from 3 PM to 7 PM (America/Denver). The main factor in its favor is dry conditions across the window, and the main watch-out is a front passing through. During that window the forecast calls for wind near 7 mph out of the west, gusting to 21 mph, surface pressure near 709 hPa on a steady trend, and rainfall totaling 0.00 inches over the four hours. Air temperature in the window sits near 59 °F, with a dominant forecast of overcast. Confidence in this read is low; it was generated July 23, 2026, 11:07 AM UTC, and reads refresh on a daily cadence. This is a weather-only read built from forecast weather alone; it does not yet use on-water reports, and confidence is capped until local water data or feedback exists.

UPDATED July 23, 2026, 11:07 AM UTCBUCKET 2026-07-23ENGINE 0.7.0

Conditions at a glance

Wind
7mph

W · gust 21

Rain / Weather
0in

Overcast

Temp
59°F

15°C · hum 67%

Pressure
20.94inHg

Steady

7-Day Fishing Forecast

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

  1. Thu · Jul 23
    3 PM → 7 PM
    MAYBE
    A front passing through
    61° / 50°F
    7 mph · Wgust 33
    0.06 in
    ↓ +0.7 hPa
  2. Fri · Jul 24
    12 PM → 4 PM
    MAYBE
    A front passing through
    73° / 52°F
    7 mph · NWgust 29
    0.00 in
    ↓ -3.6 hPa
  3. Sat · Jul 25
    5 AM → 9 AM
    MAYBE
    A front passing through
    81° / 55°F
    7 mph · Wgust 9
    0.00 in
    ↓ +0.3 hPa
  4. Sun · Jul 26
    6 AM → 10 AM
    MAYBE
    A front passing through
    81° / 55°F
    6 mph · Wgust 11
    0.00 in
    ↓ -2.0 hPa
  5. Mon · Jul 27
    5 AM → 9 AM
    MAYBE
    A front passing through
    77° / 52°F
    6 mph · Wgust 22
    1.10 in
    → +2.1 hPa
  6. Tue · Jul 28
    4 AM → 8 AM
    MAYBE
    A front passing through
    70° / 52°F
    7 mph · Wgust 7
    0.12 in
    ↓ -0.7 hPa
  7. Wed · Jul 29
    4 AM → 8 AM
    MAYBE
    A front passing through
    72° / 52°F
    6 mph · Wgust 10
    0.23 in
    ↓ +1.9 hPa

Last 3 days

Recent context — what just happened

Pressure
Rising
+3.8 hPa over 72h
Rain
Dry stretch
0.02 in totallast 72h
Wind
Gusty
7 mph · gust 33 · S
Temperature
Cooler
-1.3°F over 72h72–48°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.