Jarvis Beach Lake Water Temperature
Jarvis Beach Lake in Rolette County, North Dakota typically sits around 67°F at the surface in August — warmest in Jul (~72°F) and coldest in Apr (~52°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 29 field readings (2010–2020) via the EPA Water Quality Portal. Months with too few readings are left blank.
Is Jarvis Beach Lake warm enough to swim?
Brisk but swimmable for short dips — most people acclimate after the first few minutes.
Want more than temperature? Jarvis Beach Lake water quality: clarity, algae, phosphorus, depth, fish species, and current advisories, all on one page.
Water temperatures at nearby North Dakota lakes
Summer average ~69°F
Summer average ~69°F
Summer average ~65°F
Summer average ~70°F
Summer average ~65°F
Summer average ~66°F
Explore water temperatures
Where to stay near Jarvis Beach Lake
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Top-rated places to stay near Jarvis Beach Lake
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Frequently asked questions
What is the water temperature of Jarvis Beach Lake?
Jarvis Beach Lake typically sits around 67°F at the surface in August, from 29 EPA Water Quality Portal field readings (2010–2020). That is a typical value for the month, not a live reading.
When is Jarvis Beach Lake warmest?
Surface water at Jarvis Beach Lake is typically warmest in July, reaching about 72°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 Jarvis Beach Lake warm enough to swim?
At its typical summer peak of about 67°F, Jarvis Beach Lake rates as "cool" for swimming. Brisk but swimmable for short dips — most people acclimate after the first few minutes.
Where does this Jarvis Beach 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 — 29 readings from 1 monitoring station between 2010 and 2020. 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.