Sweet Briar Dam-Mid Reservoir Water Temperature
Sweet Briar Dam-Mid Reservoir in Morton County, North Dakota typically sits around 44°F at the surface in October — warmest in Jun (~74°F) and coldest in Oct (~44°F). That is a typical value for the month, not a live reading.
Typical water temperature by month
Column height runs from this lake’s coldest month (44°F) to its warmest (74°F).
Typical surface water temperature by month, from 25 field readings (2022–2023) via the EPA Water Quality Portal. Months with too few readings are left blank.
Is Sweet Briar Dam-Mid Reservoir warm enough to swim?
Brisk but swimmable for short dips — most people acclimate after the first few minutes.
Want more than temperature? Sweet Briar Dam-Mid Reservoir water quality: clarity, algae, phosphorus, depth, fish species, and current advisories, all on one page.
Water temperatures at nearby North Dakota lakes
Summer average ~79°F
Summer average ~64°F
Summer average ~63°F
Summer average ~66°F
Summer average ~71°F
Summer average ~61°F
Explore water temperatures
Where to stay near Sweet Briar Dam-Mid Reservoir
Planning a swim or lake trip? Compare cabins, lodges, and vacation rentals near Sweet Briar Dam-Mid Reservoir — live availability and prices. Switch the map to Satellite to see the lake and how close each stay is to the water.
Top-rated places to stay near Sweet Briar Dam-Mid Reservoir
Prices for Oct 16–18, 4 adults. Change dates on the map below.
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Frequently asked questions
What is the water temperature of Sweet Briar Dam-Mid Reservoir?
Sweet Briar Dam-Mid Reservoir typically sits around 44°F at the surface in October, from 25 EPA Water Quality Portal field readings (2022–2023). That is a typical value for the month, not a live reading.
When is Sweet Briar Dam-Mid Reservoir warmest?
Surface water at Sweet Briar Dam-Mid Reservoir is typically warmest in June, reaching about 74°F. Lake surface temperature lags air temperature by several weeks, so the warmest water usually arrives in mid-to-late summer even though the hottest air can come earlier.
Is Sweet Briar Dam-Mid Reservoir warm enough to swim?
At its typical summer peak of about 64°F, Sweet Briar Dam-Mid Reservoir rates as "cool" for swimming. Brisk but swimmable for short dips — most people acclimate after the first few minutes.
Where does this Sweet Briar Dam-Mid Reservoir water temperature data come from?
Every temperature on this page is a typical (climatological) value computed from real surface-water field readings collected by state and federal agencies and published through the EPA Water Quality Portal — 25 readings from 1 monitoring station between 2022 and 2023. They describe what is typical for each month, not the temperature right now.
About this data
Water temperatures are a climatology — the typical value for each month, averaged from real surface-water field readings collected by state and federal agencies and published through the EPA Water Quality Portal. They tell you what to expect, not the temperature at this moment. Actual conditions vary with recent weather, depth, and time of day.