Olympia, 98512

Millersylvania State Park

Book on Washington State ParksLakesideForestHikingFishingSwimmingPaddling (kayak / canoe / SUP)Mountain bikingSwim beachBoat launch / Ramp
Get alerts

Availability

Each day shows how many of this campground’s sites are open.

About this spot

Millersylvania State Park is an 842-acre camping park with 3,300 feet of freshwater shoreline on Deep Lake. The park has two swimming beaches, miles of forested hiking and biking trails, boat launches, non-motorized watercraft rentals (kayaks, paddleboards, pedal boats) and abundant fishing. The state capital is a few miles north of the park.

Typical weather

Air temperature

Average daily high-low
Average daily high and low air temperature, January through DecemberEach vertical bar shows a monthly average daily high and low in degrees Fahrenheit.47°35°JJanuary: average high 47°F, average low 35°F47°35°FFebruary: average high 47°F, average low 35°F53°36°MMarch: average high 53°F, average low 36°F58°40°AApril: average high 58°F, average low 40°F66°46°MMay: average high 66°F, average low 46°F72°50°JJune: average high 72°F, average low 50°F79°54°JJuly: average high 79°F, average low 54°F80°56°AAugust: average high 80°F, average low 56°F72°52°SSeptember: average high 72°F, average low 52°F61°45°OOctober: average high 61°F, average low 45°F51°39°NNovember: average high 51°F, average low 39°F46°36°DDecember: average high 46°F, average low 36°F

5-year average · Open-Meteo

Deep Lake

Average water temperature
Average water temperature for Deep Lake, January through DecemberEach point shows the monthly average water temperature in degrees Fahrenheit.43°JJanuary: average water temperature 43°F44°FFebruary: average water temperature 44°F48°MMarch: average water temperature 48°F51°AApril: average water temperature 51°F55°MMay: average water temperature 55°F58°JJune: average water temperature 58°F63°JJuly: average water temperature 63°F63°AAugust: average water temperature 63°F53°SSeptember: average water temperature 53°F53°OOctober: average water temperature 53°F46°NNovember: average water temperature 46°F45°DDecember: average water temperature 45°F

Water: Water Quality Portal — 253 field-sample stations