California Nature Guide: August 2026
August is the hot, golden heart of California summer — dry hills, warm valley nights, and the cool coast under fog. Southbound shorebird migration builds along the shoreline, the high meadows hold their late bloom, and the Central Valley's fruit and the first grapes pour into the markets.
What to look for this week
- Snow geese, white-fronted geese, and pintail jam the Sacramento and San Joaquin valley refuges; sandhill cranes roost near Lodi and Cosumnes.
- San Joaquin Valley navel and Cara Cara oranges and easy-peel Satsuma mandarins are at their winter peak.
- Western monarchs hang in clustered curtains in the coastal groves at Pismo Beach, Pacific Grove, and Natural Bridges.
- The Quadrantid meteor shower peaks around January 3 in a brief, sharp burst, best after midnight from a dark desert site.
Birds This Month
August is when fall migration truly takes hold in California, even amid the summer heat. The southbound shorebird migration is in full swing — the mudflats and salt ponds of San Francisco Bay, the Salton Sea, and the coastal estuaries fill with western and least sandpipers, dowitchers, marbled godwits, willets, black-bellied and semipalmated plovers, whimbrel, and the chance of rarer "peeps" among them. The South Bay salt ponds and the Salton Sea are among the continent's great August shorebird sites.
Songbird migration begins, too. Mountain birds drift downslope, the first southbound warblers, flycatchers, vireos, and tanagers move through the lowland riparian corridors, and the coastal points start producing migrants and the occasional eastern vagrant that makes California famous among listers. Hummingbird numbers swell as migrant rufous and Allen's push south.
The coast is at its summer best: Monterey Bay teems with sooty and pink-footed shearwaters, elegant terns, and Heermann's gulls, and the first Sabine's gulls and jaegers appear offshore. The endemic yellow-billed magpies gather in post-breeding flocks in the valley oaks.
This month's tip: go shorebirding on an incoming tide at a Bay estuary or the Salton Sea — August's southbound flocks are at their fresh-plumaged peak, and the variety on the mudflats is one of the season's great birding rewards.
What's Blooming
August finds most of California dry and golden, with the wildflower action lingering in the high country and in the late-blooming natives. The highest Sierra meadows and alpine slopes hold their last flowers — late paintbrush, lupine, monkeyflower, gentian, and the alpine sky pilot and alpine gold persist on the cool, high ground after the lower meadows have faded.
In the lowlands, the late-summer natives are the show. The brilliant scarlet California fuchsia (hummingbird trumpet) is at its blazing peak in the chaparral and on dry slopes, a vital late nectar source, and California goldenrod, tarweeds (which scent the golden hills), vinegar weed, and the rusty seed-heads of California buckwheat carry the dry season. The coastal bluffs and the Bay marshes hold late gumplant and the lavender of sea-lavender.
Where to see it: the highest Sierra still rewards a hike to a late-blooming alpine basin. In the lowlands, look to the dry-slope natives — the scarlet California fuchsia is the star, drawing hummingbirds and butterflies to the parched hillsides. Coastal trails in the fog belt and the salt-marsh edges of the Bay hold the last summer color. Tread carefully in the fragile high meadows.
Garden This Month
August is a two-faced month in the California garden: peak summer harvest in front, and the start of fall planting behind. The summer crops are at flood stage — pick tomatoes, peppers, eggplant, squash, cucumbers, beans, melons, and corn daily to keep them producing through the heat, and keep the water deep and the mulch thick, because this is one of the hottest, driest stretches of the year.
The forward-looking task is the fall and winter garden, the foundation of California's long cool-season harvest. Now is the time to set out transplants of broccoli, cabbage, cauliflower, and kale and to direct-sow carrots, beets, lettuce, spinach, and chard — starting seedlings in a shaded, cooler spot so they survive the August heat, then timing them to grow into the cooling autumn. Pull spent summer crops as they finish, refresh the soil with compost, and keep watering everything deeply. In the Sierra, race the coming frost and begin the season's wind-down.
Zone 10a (mild coast, Los Angeles basin): the cool coast is ideal for starting the fall garden now — sow cool-season crops and set out brassicas as the marine layer moderates the heat. Keep harvesting summer vegetables and watch for mildew in the fog. A second planting of beans and herbs will carry into fall.
Zone 6b (Sierra Nevada): the short high-country season is closing — harvest everything as it ripens, because the first fall frost can arrive as early as September at elevation. Sow only the fastest cool-season crops, and begin cleaning up and mulching beds for the long mountain winter ahead.
Zone 9b (Central Valley, inland Southern California): the hottest stretch continues — water deeply at dawn and keep mulch thick. This is the key month to plant the fall and winter garden: set out broccoli, cabbage, and cauliflower transplants and direct-sow carrots, beets, and lettuce (start in shade), timing them to mature in the cooling weather. Harvest summer crops daily.
What's at the Farmers Market
August is California abundance at its absolute peak. The stone fruit rolls on — late peaches, nectarines, plums, and pluots from the San Joaquin — and the melons are at their best, with cantaloupes, honeydews, Crenshaws, and watermelons from the hot interior valleys. Figs reach their peak, and the first table grapes and the earliest wine-grape harvest begin as the famous California crush approaches.
The summer vegetables overflow: vine-ripe tomatoes of every color, sweet corn, peppers from sweet bells to shishitos and padrons, eggplant, summer squash, green beans, cucumbers, and the first winter squash and tomatillos. Blackberries and blueberries finish the berry season.
For selection and storage: choose tomatoes fragrant and heavy and keep them stem-down at room temperature, never chilled; pick figs soft and just-split at the base and use them within a day or two, as they don't keep; thump melons for a dull, hollow ring and check for a creamy ground spot. August markets are the richest of the year — the sheer variety of peak summer fruit and tomatoes is the high point of the California growing season.
Night Sky This Month
August is one of California's best stargazing months — warm nights, the glorious summer Milky Way, and the year's most famous meteor shower. The state's dark-sky destinations shine now: the high Sierra (Yosemite, Sequoia and Kings Canyon, the Bristlecone Pine Forest), Lassen Volcanic National Park, and the deserts on their cooler nights. August is the high season for star parties, from the Sierra clubs' high-elevation gatherings to public nights at Lick and Mount Wilson observatories.
The Perseid meteor shower peaks around August 12, the year's most reliable and popular shower — under a dark Sierra or desert sky it can produce dozens of meteors an hour, best after midnight when the radiant in Perseus rides high. The summer Milky Way arches overhead, its bright Sagittarius-Scorpius core blazing in the south, and the Summer Triangle of Vega, Deneb, and Altair rides at the zenith, with the Great Rift of dark dust splitting the glowing band of the galaxy.
For this year's exact Perseid prospects relative to the moon and for current planet positions, see the printable California night-sky guide, which tailors the timing to the state's latitudes.
Butterflies & Pollinators
August keeps butterflies on the wing across California, shifting with the late bloom. In the high Sierra, the last flowering meadows and slopes still hold fritillaries, alpine blues and coppers, parnassians, and mountain checkerspots, though their season is closing as the high country dries. In the lowlands, the late-summer natives are the draw.
The scarlet California fuchsia at its peak, the buckwheats, goldenrod, and tarweeds feed hairstreaks, blues, metalmarks, painted ladies, and the bright gulf fritillaries and fiery skippers of gardens and dry slopes. The big western tiger swallowtail patrols the watered streamsides, and resident monarchs continue breeding where milkweed remains green — these late-summer monarchs include the generation that will overwinter on the coast in fall.
To help them: the late-summer monarch generation is critical to the overwintering population, so keep native milkweed green and growing now. Watered native nectar — California fuchsia, buckwheats, goldenrod, native sages, and zinnias — sustains all the pollinators through the dry heat. Provide a damp puddling spot, avoid pesticides, and leave the seed-setting natives standing for the season's last broods.
Trees This Month
August is the deepest dormancy of the dry season for California's lowland trees. The California buckeye stands bare now, its leaves long shed, hanging only its large pear-shaped seed-pods on silvery branches — a tree that runs its whole leafy life from late winter to early summer and sleeps through the heat. The blue oaks, true to their name and their dry foothill home, may drop some leaves in a severe drought year, while the valley oaks and coast live oaks hold on, their acorns swelling toward the fall drop.
The fog-fed coast and the snow-fed mountains stay green. The coast redwoods are sustained through the rainless month by the persistent summer fog that drips from their crowns, and along the coast the Pacific madrone and tanoak hold their evergreen canopies. In the high Sierra, the conifers and the giant sequoias continue their summer growth on the slow melt of the snowpack, and the quaking aspens begin, in the highest and coldest pockets, to show the very first hints of the gold that will sweep the eastern Sierra in autumn.
Go deeper with the California guides
The complete California birding, native-plant, wildflower, and night-sky guides — or the whole year in one bundle.
Same month elsewhere: August in Colorado · August in Connecticut · August in Delaware