Mirror Lake Water Temperature
Mirror Lake in Adams County, North Dakota typically sits around 47°F at the surface in October — warmest in Jun (~61°F) and coldest in Oct (~47°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 23 field readings (2023–2023) via the EPA Water Quality Portal. Months with too few readings are left blank.
Is Mirror Lake warm enough to swim?
Wetsuit territory. Brief exposure is tolerable but prolonged swimming without protection risks hypothermia.
Want more than temperature? Mirror Lake scored F 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 ~66°F
Summer average ~63°F
Summer average ~67°F
Summer average ~67°F
Summer average ~62°F
Summer average ~66°F
Explore water temperatures
Where to stay near Mirror Lake
Planning a swim or lake trip? Compare cabins, lodges, and vacation rentals near Mirror Lake — 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 Mirror Lake
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Frequently asked questions
What is the water temperature of Mirror Lake?
Mirror Lake typically sits around 47°F at the surface in October, from 23 EPA Water Quality Portal field readings (2023–2023). That is a typical value for the month, not a live reading.
When is Mirror Lake warmest?
Surface water at Mirror Lake is typically warmest in June, reaching about 61°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 Mirror Lake warm enough to swim?
At its typical summer peak of about 59°F, Mirror Lake rates as "cold" for swimming. Wetsuit territory. Brief exposure is tolerable but prolonged swimming without protection risks hypothermia.
Where does this Mirror 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 — 23 readings from 2 monitoring stations between 2023 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.