New Jersey Nature Guide: August 2026
Data updated: August 2026Sources & method · Corrections
August is late summer in New Jersey — hot and humid, with the markets at their fullest and the first stirrings of fall migration on the coast. Shorebirds pour back through the bays, the Perseid meteors streak the warm nights, and goldenrod begins to gild the meadows.
Week by week in August
July 30 – August 5
- Shorebird migration is in full swing — Forsythe and the bayshore flats fill with sandpipers, dowitchers, yellowlegs, and returning red knots and whimbrel.
- The first goldenrods open along the roadsides, joined by towering Joe-Pye weed, deep-purple ironweed, and cardinal flower along the streams.
- The key fall-planting window — sow spinach, lettuce, kale, turnips, and a final round of bush beans for autumn harvest.
August 6–12
- The Perseid meteor shower peaks around August 12, the year's most popular shower, sending swift, bright meteors from the northeast after midnight.
- Markets are at peak abundance with tomatoes and sweet corn at their best, peaches in full swing, and the ripest cantaloupe and watermelon.
- Summer broods are at full strength in the goldenrod meadows, and the first southbound monarchs begin trickling toward Cape May.
August 13–19
- The first songbird migrants slip south after cold fronts — warblers, orioles, and flycatchers move through in the cooler mornings.
- The salt marshes flush with the purple haze of sea lavender and the yellow of seaside goldenrod as the gold-and-purple season builds.
- The Andromeda Galaxy, the most distant thing visible to the naked eye, rises in the northeast late in the evening from a dark site.
August 20–26
- Watch the evening sky for the first migrating common nighthawks streaming south in loose flocks at dusk over towns and fields.
- Late summer overflows with tomatoes, corn, peppers, eggplant, and melons, and the first apples and Asian pears arrive from the orchards.
- The first hints of fall appear as stressed red maples and black gum flush isolated branches of red in the wet woods.
August 27 – September 2
- Migration accelerates — a cold front with northwest winds can pile warblers, vireos, and thrushes into the Cape May bayside woods overnight.
- Harvest heavily and sow the last fall greens, and begin saving seed from open-pollinated favorites as the season turns.
- The migratory monarch generation builds as the last summer eggs hatch on milkweed across the state.
Birds This Month
August is when fall migration takes hold in New Jersey, even as summer lingers. Shorebird migration is in full swing along the coast — Forsythe (Brigantine), the back bays, and the bayshore flats fill with semipalmated, least, and western sandpipers, short-billed dowitchers, lesser and greater yellowlegs, black-bellied plovers, and the return of southbound red knots and whimbrel. Purple martins and tree swallows form enormous pre-migration roosts.
The first songbird migrants slip south too: warblers — especially worm-eating, blue-winged, and the first northern breeders — orioles, flycatchers, and nighthawks begin trickling through, best caught in the cooler mornings after a cold front. Ruby-throated hummingbirds fuel up at jewelweed and feeders, building for their journey, and ospreys begin to wander as their young fledge.
This month's tip: watch the evening sky in late August for the first migrating common nighthawks, which stream south in loose flocks at dusk over towns and fields.
What's Blooming
August begins the long transition to the gold-and-purple flowers of late summer in New Jersey. The first goldenrods open along roadsides and in meadows, joined by the towering Joe-Pye weed, deep-purple New York ironweed, boneset, cardinal flower blazing red along streams, and the first asters. The wet meadows hold swamp milkweed, turtlehead, great blue lobelia, and stands of jewelweed in the shade.
The Pine Barrens contribute late-season specialties: the carnivorous sundews and bladderworts still flower in the wet savannas, and golden crest and various asters bloom on the plains. Along the coast, the salt marshes glow with the purple haze of sea lavender and the yellow of seaside goldenrod, and the dunes carry seabeach amaranth and beach grasses heading out. The drone of insects and the gilding of the meadows mark the turn toward autumn.
Garden This Month
August in the New Jersey garden balances peak harvest with fall planting. Tomatoes, peppers, eggplant, beans, cucumbers, and squash are producing heavily — pick often, and water deeply through the heat and any late-summer dry spells, especially in the sandy southern and shore soils. Watch for the season's peak of pests and diseases: late blight and powdery mildew thrive in the humidity, and Japanese beetles, hornworms, and stink bugs are at their worst. Stay ahead with sanitation and early intervention.
This is the key window for the fall garden. Sow spinach, lettuce, arugula, kale, turnips, radishes, carrots, beets, and a final crop of bush beans, and set out fall brassica transplants. The cooling soil and shortening days favor cool-season crops that will mature into the fall. Begin saving seed from open-pollinated favorites, keep deadheading flowers for continued bloom, and plan the garlic and cover crops you'll plant as beds open up next month.
Zone 6a (northwestern Highlands): with the first frost only weeks off (typically October), finish fall plantings early — sow spinach, lettuce, and radishes now and set out the last fall brassicas while there's still time to mature.
Zone 7a (central & southern New Jersey): peak harvest continues — keep picking tomatoes, peppers, and beans, and sow the fall garden of spinach, lettuce, kale, turnips, and radishes for an autumn harvest before frost.
Zone 7b (southern shore & Cape May): the long frost-free season means there's still ample time for fall crops — sow greens, root vegetables, and a final round of bush beans, watching for late-summer heat and humidity stress.
What's at the Farmers Market
August markets in New Jersey are at peak abundance, heavy with the late-summer harvest. Jersey tomatoes and sweet corn are at their absolute best, the twin icons of the Garden State, alongside peaches still in full swing, the last of the blueberries, and the first melons — cantaloupe and watermelon — at their ripest. Eggplant, peppers, summer squash, cucumbers, green beans, lima beans, okra, onions, and potatoes crowd the tables.
The first apples and Asian pears arrive from the orchards late in the month, and cut flowers, honey, and eggs are everywhere. Choose tomatoes that are heavy and fragrant and store them at room temperature; pick corn with tight husks and use it the day you buy it; choose peaches that give slightly and ripen them on the counter. Thump melons for a deep, hollow sound and look for a creamy ground spot. The market overflows with the height of the Jersey summer harvest.
Night Sky This Month
August offers New Jersey's best meteor display and a glorious summer Milky Way. The Perseid meteor shower peaks around August 12, the year's most popular shower, sending swift, often bright meteors radiating from Perseus in the northeast — best seen in the dark hours after midnight from a site away from city lights, when 50 or more per hour are possible in a good year.
The Summer Triangle rides nearly overhead after dark, with the Milky Way streaming through it from Cygnus down through Aquila, Scutum, and the star clouds of Sagittarius and Scorpius low in the south — the richest binocular sweep of the year. The Andromeda Galaxy, the most distant thing visible to the naked eye, rises in the northeast late in the evening.
The warm nights make August ideal for the Pine Barrens or the dark southern shore. Exact planet positions and this year's Perseid viewing details (the Moon's phase matters greatly) vary year to year — the printable New Jersey night-sky guide gives the specifics for your area.
Butterflies & Pollinators
August keeps New Jersey's butterfly diversity high and brings the first stirrings of the monarch migration. The summer broods are abundant in the goldenrod-and-aster meadows: monarchs nectar and lay the final summer eggs, building the long-lived generation that will migrate, while eastern tiger and spicebush swallowtails, great spangled fritillaries, common buckeyes, red admirals, painted and American ladies, question marks, and a profusion of skippers work the late-summer flowers. Cloudless sulphurs and other southern strays may push north in good years. By late August, the first southbound monarchs begin trickling toward Cape May, the prelude to September's great migration. The blooming goldenrod, joe-pye weed, ironweed, and asters are now essential fuel. Keep nectar plants blooming and milkweed standing for the last monarch caterpillars of the year.
What to plant for them is in the New Jersey native plants guide
Trees This Month
August's New Jersey trees are in full, slightly weary late-summer leaf, the deep green beginning to dull, and the year's fruit and nut crop is ripening. The oaks — red, white, black, and scarlet — carry maturing acorns, the hickories their nuts, and the black walnut its green husks, the mast that will sustain squirrels, jays, deer, and turkeys through winter. American beech sets its small triangular nuts.
The first hints of fall appear in the wet woods, where stressed and early red maples and black gum (tupelo) flush isolated branches of red, and the sassafras begins to turn. In the Pine Barrens, the pitch pines hold their cones and the Atlantic white cedar stays deep green in the swamps. Flowering dogwood reddens its berry clusters, and the sweetgum hangs its spiky seed balls. The forest is mature, fruiting, and just beginning its long turn toward autumn.
The New Jersey native plants guide covers what grows with them
Weather & Daylight
Across New Jersey, a typical August day averages a high near 84°F and a low near 63°F, with about 4.6 inches of precipitation — statewide averages from the 1991–2020 U.S. climate normals.
Still sweltering and humid, with warm nights near 63 offering little relief from lingering summer heat and soaking storms.
| Average high | 84°F |
|---|---|
| Average low | 63°F |
| Precipitation | 4.6 in |
| Sunrise (mid-month) | 6:09 ET |
| Sunset (mid-month) | 19:57 ET |
Figures are statewide averages over the 1991–2020 U.S. climate normals; local conditions vary with elevation and distance from the coast. Sunrise and sunset are computed for a midstate point on the 15th (ET).
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One short note when New Jersey's next month turns — what's arriving, blooming, and worth a night outside.
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The complete New Jersey birding, native-plant, and night-sky references — or the whole year, week by week, in one book.
Same month elsewhere: August in New Mexico · August in New York · August in North Carolina