Lake Oahe

Dewey County, SD

MAYBEConfidence · Low
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 Lake Oahe — 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, Now → 8 AM (America/Denver)

Full read

The latest cached fishing-weather read for Lake Oahe in Dewey 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 4 mph out of the southwest, gusting to 7 mph; surface pressure near 953 hPa on a rising trend; 0.00 inches of rain; and air temperature near 66 °F with clear dominant. Confidence in this cached read is low; it was generated September 10, 2026, 1:00 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, 1:00 PM UTCBUCKET 2026-09-10ENGINE 0.7.0

Conditions at a glance

Wind
4mph

SW · gust 7

Rain / Weather
0in

Clear

Temp
66°F

19°C · hum 65%

Pressure
28.14inHg

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
    4 mph · SWgust 17
    0.00 in
    ↓ -12.8 hPa
  2. Fri · Sep 11
    Now → 8 AM
    MAYBE
    A front passing through
    91° / 63°F
    6 mph · SEgust 34
    0.00 in
    ↑ +5.3 hPa
  3. Sat · Sep 12
    10 AM → 2 PM
    MAYBE
    A front passing through
    72° / 59°F
    7 mph · Ngust 29
    0.00 in
    ↑ +6.6 hPa
  4. Sun · Sep 13
    4 AM → 8 AM
    MAYBE
    A front passing through
    61° / 55°F
    12 mph · Egust 30
    0.20 in
    ↓ -4.0 hPa
  5. Mon · Sep 14
    5 AM → 9 AM
    MAYBE
    A front passing through
    75° / 55°F
    7 mph · Sgust 30
    0.05 in
    ↑ +7.3 hPa
  6. Tue · Sep 15
    9 AM → 1 PM
    MAYBE
    A front passing through
    61° / 52°F
    6 mph · NEgust 25
    0.00 in
    ↑ +5.2 hPa
  7. Wed · Sep 16
    4 AM → 8 AM
    MAYBE
    A front passing through
    64° / 52°F
    6 mph · Egust 12
    0.01 in
    ↑ +1.4 hPa

Last 3 days

Recent context — what just happened

Pressure
Rising
+7.5 hPa over 72h
Rain
Wet stretch
0.72 in totallast 72h
Wind
Gusty
11 mph · gust 33 · W
Temperature
Cooler
-6.8°F over 72h88–57°F range

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

About Lake Oahe

Lake Oahe, in Dewey County, SD, is 4th largest reservoir in North America.

Surface area
360,000 acres
Max depth
200 ft
Elevation
1,617 ft
Managing agency
U.S. Army Corps of Engineers
Dam
Oahe Dam (Missouri River)

Primary species: Walleye, Smallmouth bass, Chinook salmon, Channel catfish, Northern pike, Yellow perch, White bass, Sauger, Black crappie, White crappie.

Notable structure: sub-embayments, shale banks, gravel shorelines, creek arms, tributary river arms.

Nearby waters

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