Nygren Dam Lake Water Temperature
Nygren Dam Lake in Morton County, North Dakota typically sits around 64°F at the surface in August — warmest in Jul (~64°F) and coldest in Oct (~46°F). That is a typical value for the month, not a live reading.
Typical water temperature by month
Typical surface water temperature by month, from 30 field readings (2011–2023) via the EPA Water Quality Portal. Months with too few readings are left blank.
Is Nygren Dam Lake warm enough to swim?
Brisk but swimmable for short dips — most people acclimate after the first few minutes.
Want more than temperature? Nygren Dam Lake scored D on water quality — clarity, algae, phosphorus, depth, fish species, and swimming safety, all on one report card.
Water temperatures at nearby North Dakota lakes
Summer average ~64°F
Summer average ~63°F
Summer average ~79°F
Summer average ~69°F
Summer average ~71°F
Summer average ~66°F
Explore water temperatures
Where to stay near Nygren Dam Lake
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Frequently asked questions
What is the water temperature of Nygren Dam Lake?
Nygren Dam Lake typically sits around 64°F at the surface in August, from 30 EPA Water Quality Portal field readings (2011–2023). That is a typical value for the month, not a live reading.
When is Nygren Dam Lake warmest?
Surface water at Nygren Dam Lake is typically warmest in July, reaching about 64°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 Nygren Dam Lake warm enough to swim?
At its typical summer peak of about 64°F, Nygren Dam Lake rates as "cool" for swimming. Brisk but swimmable for short dips — most people acclimate after the first few minutes.
Where does this Nygren Dam Lake 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 — 30 readings from 1 monitoring station between 2011 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.