Summit Reservoir

Lyman County, SD

MAYBEConfidence · Medium
Best bite window
Mon · Oct 26, 10 PM → 2 AM (America/Chicago)
Main reason
dry conditions across the window
Main risk
a front passing through

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

Full read

The current fishing-weather read for Summit Reservoir in Lyman County, SD is MAYBE, with the best four-hour window on Mon, Oct 26 from 10 PM to 2 AM (America/Chicago). 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 6 mph out of the east, gusting to 12 mph, surface pressure near 945 hPa on an unstable trend, and rainfall totaling 0.02 inches over the four hours. Air temperature in the window sits near 34 °F, with a dominant forecast of light snow. Confidence in this read is medium; it was generated October 26, 2026, 9:22 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 October 26, 2026, 9:22 AM UTCBUCKET 2026-10-26ENGINE 0.7.0

Conditions at a glance

Wind
6mph

E · gust 12

Rain / Weather
0.02in

Light snow

Temp
34°F

1°C · hum 100%

Pressure
27.91inHg

Unstable

7-Day Fishing Forecast

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

  1. Mon · Oct 26
    Window passed
    MAYBE
    A front passing through
    39° / 34°F
    9 mph · NEgust 18
    0.59 in
    ↓ -7.0 hPa
  2. Tue · Oct 27
    4 AM → 8 AM
    MAYBE
    A front passing through
    57° / 34°F
    5 mph · SEgust 28
    0.00 in
    ↓ -11.3 hPa
  3. Wed · Oct 28
    4 AM → 8 AM
    MAYBE
    A front passing through
    57° / 46°F
    4 mph · SWgust 25
    0.05 in
    ↑ +6.0 hPa
  4. Thu · Oct 29
    4 AM → 8 AM
    MAYBE
    A front passing through
    64° / 43°F
    6 mph · Sgust 19
    0.00 in
    → +2.9 hPa
  5. Fri · Oct 30
    4 AM → 8 AM
    MAYBE
    A front passing through
    57° / 45°F
    7 mph · Egust 25
    0.00 in
    ↓ -1.7 hPa
  6. Sat · Oct 31
    4 AM → 8 AM
    MAYBE
    A front passing through
    68° / 50°F
    9 mph · SEgust 24
    0.00 in
    ↓ -7.1 hPa
  7. Sun · Nov 1
    4 PM → 8 PM
    MAYBE
    A front passing through
    64° / 52°F
    7 mph · Wgust 24
    0.00 in
    ↓ +0.1 hPa

Last 3 days

Recent context — what just happened

Pressure
Unstable
+21.0 hPa over 72h
Rain
Light rain
0.27 in totallast 72h
Wind
Gusty
12 mph · gust 43 · E
Temperature
Cooler
-26.1°F over 72h84–36°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.