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South DakotaReservoir, 328 acres, Pennington County

Deerfield Reservoir conditions today

Shoreline: USGS National Hydrography Dataset

Right now on Deerfield

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Best window

0pm to 0pm

score

Wind

00kt

Gusts 00

Direction

NE

Blowing from

Air temp

00°F

High

Rain

Dry

next 6 hours

Water level

1.52ft

Down 0.64 ft this week

Sailing

Checking

Reading the forecast

Kayak and SUP

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Reading the forecast

Power boating

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Fishing

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Reading the forecast

Hour by hour

Next 24 hours
Wind and gusts0 to 30+ ktScoreGood, caution, stay ashoreNightBest windowArrows point where the wind blows to.

Outlook. Monday: SE wind 2 to 4 kt, gusts to 11 kt, high near 40°F. Tuesday: WSW wind 4 to 15 kt, gusts to 31 kt, high near 51°F.

7-day wind forecast

Live radar

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LightHeavy

Last hour of NOAA MRMS radar, 1 km resolution. Map data © OpenStreetMap contributors, OpenMapTiles, OpenFreeMap.

Water level

Full report

1.52ft NGVD29

-0.64 ft in 7 days
Sep 25Oct 10Oct 25

Reading from Oct 26, 2026.

Deerfield Reservoir was at 1.52 ft on October 26, falling 0.64 ft over the past week.

Lake facts

Type
Reservoir
State
South Dakota
County
Pennington County
Surface area
328 acres
USGS gauge
06409500, Deerfield Reservoir near Hill City SD
Coordinates
44.0194° N, 103.7992° W

About Deerfield Reservoir

Set in Pennington County, South Dakota, Deerfield Reservoir is a 328-acre reservoir.

Water level on this page comes from USGS gauge 06409500 (Deerfield Reservoir near Hill City SD). Wind, gusts and rain come from the National Weather Service forecast grid that covers the water.

On water this size, waves stay small even on windy days. The catch is gusts: shoreline terrain funnels the wind into sharp puffs that catch out small boats and paddlers. Reservoir levels move with releases and inflow, so ramps and beaches can change week to week. The water level page tracks that day by day.

The go or no-go calls above are a starting point, not a guarantee. Read how we score conditions, and always check local rules and posted warnings before you launch.

Deerfield Reservoir questions

Is it windy on Deerfield Reservoir today?

The National Weather Service forecast for the lake from October 26: Monday: SE wind 2 to 4 kt, gusts to 11 kt, high near 40°F. The panel at the top of this page refreshes the current wind, gusts and direction when you open it and turns them into a call for sailing, paddling, power boating and fishing.

What is the water level at Deerfield Reservoir right now?

Deerfield Reservoir was at 1.52 ft on October 26, falling 0.64 ft over the past week.

How big is Deerfield Reservoir?

Deerfield Reservoir covers about 328 acres (0.5 square miles) of surface water.

Nearby lakes

If Deerfield is blown out, these are the closest alternatives. Tap through for their conditions.