Summit Reservoir

Lyman County, SD

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 Summit Reservoir — 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/Chicago)

Full read

The latest cached fishing-weather read for Summit Reservoir in Lyman County, SD 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 6 mph out of the southwest, gusting to 16 mph; surface pressure near 939 hPa on a rising trend; 0.00 inches of rain; and air temperature near 84 °F with clear dominant. Confidence in this cached read is medium; it was generated September 10, 2026, 1:23 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, 1:23 PM UTCBUCKET 2026-09-10ENGINE 0.7.0

Conditions at a glance

Wind
6mph

SW · gust 16

Rain / Weather
0in

Clear

Temp
84°F

29°C · hum 31%

Pressure
27.73inHg

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
    88° / 57°F
    6 mph · SWgust 27
    0.00 in
    ↓ -11.5 hPa
  2. Fri · Sep 11
    4 AM → 8 AM
    MAYBE
    A front passing through
    93° / 61°F
    8 mph · Sgust 34
    0.00 in
    ↓ +1.1 hPa
  3. Sat · Sep 12
    12 PM → 4 PM
    MAYBE
    A front passing through
    73° / 57°F
    7 mph · Ngust 30
    0.00 in
    ↑ +8.1 hPa
  4. Sun · Sep 13
    5 AM → 9 AM
    MAYBE
    A front passing through
    61° / 55°F
    11 mph · Egust 34
    0.30 in
    ↓ -3.6 hPa
  5. Mon · Sep 14
    4 AM → 8 AM
    MAYBE
    A front passing through
    75° / 55°F
    7 mph · SEgust 30
    0.04 in
    ↑ +3.7 hPa
  6. Tue · Sep 15
    6 AM → 10 AM
    MAYBE
    A front passing through
    61° / 50°F
    6 mph · Ngust 26
    0.01 in
    ↑ +6.6 hPa
  7. Wed · Sep 16
    4 AM → 8 AM
    MAYBE
    A front passing through
    61° / 52°F
    6 mph · Egust 16
    0.00 in
    ↑ +2.6 hPa

Last 3 days

Recent context — what just happened

Pressure
Rising
+7.2 hPa over 72h
Rain
Wet stretch
0.79 in totallast 72h
Wind
Gusty
11 mph · gust 35 · SW
Temperature
Cooler
-7.9°F over 72h84–61°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.