Maryland Nature Guide: August 2026
August is late summer in Maryland — hot, humid, and abundant, with shorebird migration building on the Bay flats, the meadows shifting toward goldenrod and Joe-Pye weed, the markets at their peak of corn, tomatoes, peaches, and crabs, and the Perseid meteors crossing the August nights.
What to look for this week
- The Chesapeake waterfowl winter peaks — Tundra Swans, geese, and rafts of canvasback and redhead crowd Blackwater NWR as the Christmas Bird Counts wrap up across Maryland.
- The Quadrantid meteor shower peaks in a short, sharp burst around January 3 — watch after midnight from a dark site like Assateague Island or the Garrett County highlands.
- A planning week for Maryland gardeners — review last season and order seeds early before the popular varieties sell out, while the ground sits frozen.
Birds This Month
August is the heart of southbound shorebird migration in Maryland. The Eastern Shore impoundments at Blackwater and the Bay flats fill with returning least, semipalmated, and western sandpipers, short-billed dowitchers, lesser and greater yellowlegs, semipalmated plovers, stilt sandpipers, and the occasional rarity — the year's best wader-watching. The salt marshes and beaches of Assateague hold willets, oystercatchers, and gathering terns.
In the woods and gardens, the breeding season winds down and the first songbird migrants slip south. Ruby-throated hummingbirds fuel up at the jewelweed and feeders in big numbers before crossing the Gulf, and the earliest warblers — American redstart, black-and-white, worm-eating, and prairie — begin filtering through, harder to find now in fall plumage and silence. Common nighthawks stream south in loose flocks at dusk late in the month, and swallows mass on the wires. The Bay's Ospreys begin to drift south as their young become independent.
What's Blooming
August shifts Maryland's meadows toward the golds and purples of late summer. The goldenrods come into their own — tall, gray, and wrinkleleaf in the fields, seaside goldenrod on the Assateague dunes — joined by towering ironweed, Joe-Pye weed, boneset, common and swamp sunflower, wingstem, and the last golden black-eyed Susans, the state flower. The first wild asters open at month's end.
The wetlands and tidal marshes are gorgeous now — swamp rose mallow (the big pink marsh hibiscus), cardinal flower, blue lobelia, pickerelweed, swamp milkweed, and stands of wild rice ripening in the fresh tidal flats of the upper Bay. Along the streams, jewelweed and cardinal flower glow in the shade. In gardens, phlox, black-eyed Susan, coneflower, sedum, sunflowers, zinnias, and the first asters carry the color. The late-summer pollinator season peaks on the goldenrod and ironweed, fueling the migrating monarchs.
Garden This Month
August is the month of peak harvest and the start of the fall garden in Maryland. The summer crops are at full production — pick tomatoes, peppers, eggplant, cucumbers, summer squash, beans, okra, and sweet corn daily, and the first melons and winter squash ripen. Keep up the watering through the hot, often dry stretches, and stay on top of the humid-season diseases — early and late blight, powdery mildew, and bacterial wilt — by removing affected foliage promptly.
This is the key window to plant for autumn and a fall harvest. Direct-sow spinach, lettuce, arugula, kale, mustard, radishes, turnips, beets, and a final bush bean crop, and set out transplants of broccoli, cabbage, cauliflower, and collards for cool-weather maturing. Lift and cure remaining onions and garlic, harvest and dry herbs, and keep the beds weeded and mulched. Deadhead annuals and perennials to extend the bloom, and water containers daily through the August heat.
Zone 7a (central Piedmont & the Baltimore–Washington corridor): harvest and plant for fall. Pick the summer crops daily, water through dry spells, and direct-sow fall greens — spinach, lettuce, arugula, kale — and root crops as the worst heat eases late in the month.
Zone 7b (lower Eastern Shore & the Bay's warming edge): peak heat and humidity. Keep watering and watch for fungal blights on tomatoes and squash, harvest at the peak, and start fall brassica transplants for the long autumn this zone allows.
What's at the Farmers Market
August is the peak of the Maryland market year. The Eastern Shore's sweet corn and vine-ripe tomatoes are at their absolute best, joined by peppers, eggplant, cucumbers, summer squash, green beans, okra, and the first winter squash. The fruit tables overflow with peaches, nectarines, cantaloupe, watermelon, blackberries, and the late blueberries, and the Chesapeake's blue crabs are at their summer height.
Buy and eat sweet corn the same day for the sweetest flavor, keeping it in the husk and refrigerated until use. Choose tomatoes that are fragrant and heavy and keep them on the counter, never the fridge. Pick peaches and melons by smell — a sweet fragrance at the stem end means ripe — and ripen hard peaches on the counter before refrigerating. For crabs, choose heavy, lively ones and cook the same day. Watermelons should sound hollow and have a creamy-yellow ground spot where they sat. This is the month to fill the table from Maryland farms.
Night Sky This Month
August brings the year's most beloved meteor shower and the summer Milky Way at its richest over Maryland. The Perseid meteor shower peaks around August 12, sending dozens of bright, fast meteors an hour radiating from Perseus in the northeast — best after midnight from a dark site like Assateague Island or the Garrett County mountains, away from the Baltimore–Washington light dome. It is the most reliable and comfortable shower of the year to watch on a warm August night.
Overhead, the Summer Triangle rides at the zenith, and the Milky Way arches from Sagittarius and Scorpius low in the south up through Cygnus the Swan, dense with star clouds, the Lagoon and Trifid nebulae, and the Andromeda Galaxy rising in the east. The first hint of the autumn stars appears late in the night. The printable Maryland night-sky guide lists this year's exact Perseid peak date, planet positions, and the darkest sites near you.
Butterflies & Pollinators
August keeps Maryland's butterfly season near its peak, and the late-summer flowers feed a busy fauna. Eastern tiger, black, spicebush, and zebra swallowtails are joined by great spangled fritillaries, common buckeyes, red-spotted purples, viceroys, question marks, and waves of cloudless and cloudless sulphurs drifting north, while the meadows hum with silver-spotted, fiery, sachem, and other skippers nectaring on the goldenrod and ironweed.
Most important, the monarch numbers build toward the fall migration. The late-summer broods mature, and by month's end the first southbound migrants begin moving down the coast. Watch the blooming goldenrod, ironweed, Joe-Pye weed, swamp milkweed, and garden zinnias for clouds of butterflies, and check milkweed for the last monarch caterpillars of the season. The dune-edge flowers at Assateague are already drawing the leading migrants. The pollinator garden is still at full intensity, fueling the great journey south that defines the coming weeks.
Trees This Month
August is the still, deep-green pause before the turn in the Maryland woods. The fruits and seeds ripen toward fall — the acorns swell and begin to color on the oaks, the black gum (tupelo) shows the first early-reddening leaves (always among the first to turn), and the flowering dogwood, black cherry, and spicebush ripen their fruit for the gathering bird migration. In the river bottoms, the pawpaws ripen to soft, fragrant fruit beneath their broad leaves.
A few trees still hold late flowers — the introduced crape myrtles are in full summer bloom in town, and the native sourwood finishes its white bells and begins to redden early. On the Coastal Plain, the loblolly and Virginia pines stand dark over the ripening hardwoods, and the American holly berries are green and swelling toward their winter red. The leaves look tired and dusty by month's end, and the first hint of yellow appears in the tulip poplars and the dry-soil black walnuts, early signs that the long Maryland autumn is near.
Go deeper with the Maryland guides
The complete Maryland birding, native-plant, wildflower, and night-sky guides — or the whole year in one bundle.
Same month elsewhere: August in Massachusetts · August in Michigan · August in Minnesota