Do I need a jacket in Boston in August?

Probably not for daytime — highs average around 81°F. A light layer for air-conditioned interiors is enough.

Is August rainy in Boston?

Expect roughly 9 days of rain across the month. Pack a compact umbrella and shoes that can handle wet pavement.

How hot does Boston get in August?

Daytime highs average around 81°F. Lean toward breathable fabrics like cotton and linen, and bring sun protection.

What to Pack for Boston in August — 2026 Packing List

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Essentials

If you only pack a few things, pack these.

Lightweight T-shirts and summer topsEssential
Boston's August averages 81°F — lightweight cotton and moisture-wicking tops remain the daytime standard for Freedom Trail walks, Back Bay exploring, and outdoor events at the Esplanade.
Light summer dresses or shortsEssential
August is Boston's last reliably hot summer month — light dresses and shorts are appropriate for daytime activities at the Public Garden, Esplanade, and harbor waterfront.
Light long-sleeve layer or cardiganEssential
Boston's August evenings cool to 66°F, particularly near the harbor and Esplanade — a light cardigan extends outdoor comfort for evening Red Sox games and harbor dining.
Comfortable flat-soled walking shoesEssential
The Freedom Trail and Beacon Hill cobblestones in Boston's August heat require supportive flat-soled shoes — the historic brick and uneven cobblestone terrain fatigues feet in unsupportive footwear over the 2.5-mile route.
SunglassesEssential
Boston's August sun remains strong on the harbor waterfront and Charles River Esplanade — polarized sunglasses reduce water reflection glare during outdoor summer activities.
Sunscreen SPF 30+Essential
Late summer sun at Boston's harbor islands, Esplanade, and Fenway Park is deceptively strong — SPF 30 applied and reapplied covers all-day outdoor activity during Boston's outdoor event season.

Clothing

Lightweight T-shirts and summer topsEssential
Boston's August averages 81°F — lightweight cotton and moisture-wicking tops remain the daytime standard for Freedom Trail walks, Back Bay exploring, and outdoor events at the Esplanade.
Light summer dresses or shortsEssential
August is Boston's last reliably hot summer month — light dresses and shorts are appropriate for daytime activities at the Public Garden, Esplanade, and harbor waterfront.
Light long-sleeve layer or cardiganEssential
Boston's August evenings cool to 66°F, particularly near the harbor and Esplanade — a light cardigan extends outdoor comfort for evening Red Sox games and harbor dining.
Packable light jacketRecommended
Late August in Boston can bring the first hints of fall — a packable light jacket handles the occasional cooler evening near the harbor waterfront without requiring a full fall coat.
One light sweaterRecommended
The last week of August in Boston can feel noticeably cooler as the season transitions — a slightly heavier sweater covers early-fall temperature dips near the harbor and Charles River.

Footwear

Comfortable flat-soled walking shoesEssential
The Freedom Trail and Beacon Hill cobblestones in Boston's August heat require supportive flat-soled shoes — the historic brick and uneven cobblestone terrain fatigues feet in unsupportive footwear over the 2.5-mile route.
SandalsRecommended
August afternoons at 81°F are ideal for sandals at the Public Garden, Esplanade, and harbor waterfront — bring flat closed-toe shoes for the Freedom Trail sections with uneven cobblestone.
Comfortable sneakersRecommended
Boston's August neighborhood walks through the South End, Beacon Hill, and the North End reward supportive sneakers for the miles of summer exploring on the city's varied terrain.

Accessories

SunglassesEssential
Boston's August sun remains strong on the harbor waterfront and Charles River Esplanade — polarized sunglasses reduce water reflection glare during outdoor summer activities.
Sunscreen SPF 30+Essential
Late summer sun at Boston's harbor islands, Esplanade, and Fenway Park is deceptively strong — SPF 30 applied and reapplied covers all-day outdoor activity during Boston's outdoor event season.
Compact umbrellaRecommended
Boston's 9 August rainy days include afternoon thunderstorms that can interrupt outdoor events at the Esplanade and harbor — a compact umbrella handles them without a full rain jacket in the summer heat.
Reusable water bottleRecommended
Boston's 81°F August heat and active outdoor days at the Esplanade, harbor islands, and Fenway Park require consistent hydration throughout the day.

Local tips for Boston in August

Boston's August outdoor dining scene peaks on Newbury Street, in the South End, and along the Esplanade — evening outdoor tables at 66°F are comfortable with a light layer, and the Back Bay and South End restaurant concentration makes for excellent warm-weather dining exploration.

The Boston Harbor Islands beach season is at its best in August — Spectacle Island's sandy beach and Lovells Island's wilder coastline offer genuine summer escape from the city's 81°F heat; take the Long Wharf ferry and bring sunscreen, water, and a packed lunch.

Late August in Boston marks the return of the university and college population — Harvard Square, the Back Bay, and the South End start filling up again in late August, and the city's restaurant and bar scene intensifies ahead of the fall academic calendar.

Want the full picture? 12 outfit lookbooks for Boston in Summer, plus restaurant + day-trip dress codes →

FAQ — Boston in August

Probably not for daytime — highs average around 81°F. A light layer for air-conditioned interiors is enough.
Expect roughly 9 days of rain across the month. Pack a compact umbrella and shoes that can handle wet pavement.
Daytime highs average around 81°F. Lean toward breathable fabrics like cotton and linen, and bring sun protection.
Boston's August outdoor dining scene peaks on Newbury Street, in the South End, and along the Esplanade — evening outdoor tables at 66°F are comfortable with a light layer, and the Back Bay and South End restaurant concentration makes for excellent warm-weather dining exploration.

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August Packing List for Boston — What to Wear & Bring