Month guide
Best national parks to visit in August
August is still high-country season, and the best trips chase altitude, latitude, or ocean air. Late summer brings the warmest lake water up north and warm, dry days on California's islands.
Short answer
In August, go to Crater Lake, Lassen Volcanic, Sequoia, Yellowstone, Olympic, Voyageurs, Channel Islands, or Wrangell-St. Elias. NOAA normals put August highs near 76F at Lodgepole in Sequoia and 69F at Crater Lake.
How the August picks were chosen
- Average daily highs at the park's NOAA station land in a comfortable hiking range for August, not a heat or cold extreme.
- August falls inside the park's own best season, or close to it, so the trip is not fighting the calendar.
- Main roads and visitor areas are typically open, with any seasonal closures called out below.
- Every number comes from NOAA's 1991-2020 climate normals, with the station named, so you can check the source.
Recommended parks
Each pick links to the full park guide with season tables, logistics, packing, and route context.
The bluest lake, snow-freeCrater Lake
- Best for
- Rim Drive, Watchman Peak, and Plaikni Falls
- Watch
- Wildfire smoke can haze the view in late summer. Check air quality before the drive.
Park headquarters averages 69F highs and 42F lows in August, reliably inside the short snow-free season.
August by the numbers
- Avg high
- 69F
- Avg low
- 42F
- Precip
- 0.8 in
NOAA station CRATER LAKE NPS HQ (USC00351946), park headquarters below the rim.
Pack for Crater Lake in August
Volcano hiking seasonLassen Volcanic
- Best for
- Lassen Peak, Bumpass Hell, and lake swims
- Watch
- Bumpass Hell and Lassen Peak trailheads fill early. Start at dawn.
Manzanita Lake averages 78F highs and 45F lows in August, and the main park road is fully plowed and snow-free from late July.
August by the numbers
- Avg high
- 78F
- Avg low
- 45F
- Precip
- 0.3 in
NOAA station MANZANITA LAKE (USC00045311), Manzanita Lake at the northwest entrance.
Pack for Lassen Volcanic in August
Big trees, cool airSequoia
- Best for
- General Sherman Tree, Moro Rock, and Crescent Meadow
- Watch
- The Generals Highway is steep and winding. Allow extra time and use the park shuttle where it runs.
Lodgepole, near the Giant Forest, averages 76F highs and 44F lows in August, while the foothills far below are much hotter.
August by the numbers
- Avg high
- 76F
- Avg low
- 44F
- Precip
- 0.2 in
NOAA station LODGEPOLE (USC00045026), Lodgepole, near the Giant Forest.
Pack for Sequoia in August
Late summer wildlifeYellowstone
- Best for
- Lamar and Hayden valleys, geyser basins, and lake views
- Watch
- Crowds stay high until Labor Day. Plan wildlife drives for dawn and dusk.
Old Faithful averages 75F highs and 37F lows in August, and nights are already cool.
August by the numbers
- Avg high
- 75F
- Avg low
- 37F
- Precip
- 1.4 in
NOAA station OLD FAITHFUL (USC00486845), Old Faithful, on the central plateau.
Pack for Yellowstone in August
Beaches and ridgesOlympic
- Best for
- Rialto Beach, Hurricane Ridge, and the Hoh Rain Forest
- Watch
- Tides decide coastal hikes. Carry a tide table and know when headlands become impassable.
Port Angeles averages 67F highs and 55F lows in August, while the Quinault rainforest side averages 73F with 3.1 inches of rain even in late summer.
August by the numbers
- Avg high
- 67F
- Avg low
- 55F
- Precip
- 0.7 in
NOAA station PORT ANGELES (USC00456624), Port Angeles, the drier northern gateway (gateway station).
Pack for Olympic in August
Warm lake waterVoyageurs
- Best for
- Houseboats, canoe camping, and Kettle Falls
- Watch
- Most sites are reached by boat. Book houseboats and water taxis early.
International Falls averages 76F highs and 50F lows in August, the heart of the park's July and August season.
August by the numbers
- Avg high
- 76F
- Avg low
- 50F
- Precip
- 2.8 in
NOAA station INTL FALLS INTL AP (USW00014918), International Falls, near Rainy Lake (gateway station).
Pack for Voyageurs in August
Warm island daysChannel Islands
- Best for
- Snorkeling, sea caves by kayak, and island camping
- Watch
- Boats sell out on summer weekends. Reserve with the park concessioner early.
The mainland harbor averages 74F highs and 61F lows in August with almost no rain, and the park's warmest water and calmest crossings arrive in summer through early fall.
August by the numbers
- Avg high
- 74F
- Avg low
- 61F
- Precip
- 0.0 in
NOAA station OXNARD VENTURA CO AP (USW00093110), the Ventura and Oxnard coast, where boats depart (gateway station).
Pack for Channel Islands in August
Kennecott and glaciersWrangell-St. Elias
- Best for
- Kennecott mill tours, Root Glacier, and flightseeing
- Watch
- The McCarthy Road is gravel and slow, and many rental agreements forbid it. Check before you book the car.
McCarthy averages 67F highs and 40F lows in August, near the end of the June to August season.
August by the numbers
- Avg high
- 67F
- Avg low
- 40F
- Precip
- 2.7 in
NOAA station MCCARTHY 3 SW (USC00505757), McCarthy, near Kennecott.
Pack for Wrangell-St. Elias in AugustWhat to pack for the national parks in August
Built from the NOAA averages for the parks above, so it covers the whole spread, from the coldest morning to the warmest afternoon on this list.
A warm layer for mornings
The coldest pick, Yellowstone, averages 37F lows in August. A light puffy or fleece covers sunrise starts.
Layers for a big daily swing
Yellowstone swings from about 37F at dawn to 75F in the afternoon. Dress in layers you can peel off on the trail.
Sun cover and a water plan
Lassen Volcanic averages 78F highs in August. Carry more water than feels necessary and cover up from the sun.
A real rain shell
Voyageurs averages 2.8 inches of precipitation in August. A waterproof shell is not optional there.
August at every national park, by the numbers
Average August highs, lows, and precipitation for the 61 national parks with a usable NOAA station, warmest first. "Best season" marks parks whose own peak window includes August. Tap a park for its full guide, or a pack link for a August packing list.
Source: NOAA NCEI U.S. Climate Normals, 1991-2020 monthly averages, one station per park at or near its main visitor area (each park guide names its station and distance). Gateway stations sit outside the park where no in-park station publishes normals. Isle Royale and Kobuk Valley have no representative station and are left out. Averages describe a typical year, not a forecast.
Planning notes
Smoke is the late-summer variable
Western wildfire smoke can dim views and air quality for days. Keep a flexible order of parks and check air quality maps before each drive.
Labor Day is the turning point
Crowds in the big parks drop after the holiday while most high roads stay open. If your dates can slide a week later, they probably should.
Nights are already cool up high
Yellowstone averages 37F lows at Old Faithful in August. Campers need a real sleeping bag, not a summer quilt.
Frequently asked questions
Is August too crowded for national parks?
August is still peak season in the high-country parks. Start days at dawn, favor weekdays, and consider the late-August weeks when many schools are back in session.
What is the warmest national park in August?
Death Valley has the warmest August normals of any park with a NOAA station, averaging 116F highs and 89F lows. In the lower 48 the warmest are Death Valley (116F), Joshua Tree (103F), and Saguaro (99F), based on NOAA's 1991-2020 climate normals.
Which national parks stay coolest in August?
In the lower 48, the coolest August normals belong to Mount Rainier (64F average highs), Redwood National and State Parks (66F average highs), and Olympic (67F average highs). Figures are for each park's NOAA station, named in its park guide. High elevation and ocean air do the work.
Pack and plan this trip
Gear keyed to what these parks are for, the tools to size your days and budget, and explainers worth a read before you go.
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