30YearWeather
Boston in August
Boston weather in August - United States
😊Warm & Pleasant

Boston Weather in August

Plan your August trip to Boston, United States. Based on 30 years of NASA data, expect temperatures of 27°C (high) to 18°C (low), with 24% rain probability and 8 hours of daily sunshine. The Atlantic Ocean averages 20°C in August. Great conditions with only 10 rainy days expected.

Avg High
27°C

Hottest around day 4

Avg Low
18°C

Coolest around day 31

Rainy Days
10days

24% avg rain chance

Sunshine
8hrs/day

Summer season

Sea Temperature in August

Atlantic Ocean

19.6°C

Monthly Average

Water Feel
🏊Pleasant

Comfortable for most swimmers

Swim Rating
👍Good for swimming

Based on average sea surface temperature

Body of Water
Atlantic Ocean

Boston coastline

Boston August Weather Calendar

Click any day to see detailed weather information

Currency

USD

$ United States dollar

Language

English

Driving

Right side

Connect

Greater Boston uses10-digit dialing. Th...

Safety

Moderate Safety

GPI: 2.44

Travel Intelligence

Exclusive flight analytics & health data for Boston

Smart Flight Estimator

Airport-to-Airport Logistics

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Add your home location in settings to see airport details.

Flight Connectivity Analysis

Airport traffic data & seasonal patterns

Major Hub
84/ 100
Traffic Index

Extremely busy airport

Peak Daily Arrivals

0

slots per day

Peak

Aug

Low

Nov

Monthly Traffic Distribution

465
Jan
490
Feb
551
Mar
596
Apr
643
May
627
Jun
650
Jul
676
Aug
651
Sep
635
Oct
424
Nov
533
Dec
Traffic Level
Low Season

Key Connections

Washington Ronald Reagan National (DCA)
Chicago O'Hare (ORD)
New York John F Kennedy (JFK)
Philadelphia (PHL)
Atlanta Hartsfield Jackson (ATL)

Health & Safety Advisory

CDC travel health recommendations

No Requirements

No Special Vaccinations Required

Standard travel precautions apply

Source: CDC Travelers' Health

View Complete Health Guide

Is August a Good Time to Visit Boston?

👌Decent conditions for most activities
Short Answer

⚠️ August falls in Boston's typhoon season. While daily weather averages 27°C with 24% rain, tropical storms can disrupt travel. Flexible bookings recommended.

Decision Factors

Atlantic Hurricane season active

Atlantic zone - expect potential atlantic hurricane activity

Peak tourist season

100% of annual peak - expect crowds and peak prices

Plenty of sunshine

10.5h of sunshine daily

Calm, family-friendly seas

0.41m wave height - Lake-like

Exceptional dining scene

26 Michelin-listed restaurants

Good For

  • 👨‍👩‍👧‍👦
    Families with children

    Comfortable 27.1°C temperatures and low 24% rain risk

  • 🥾
    Outdoor enthusiasts

    Ideal hiking conditions: 27.1°C, 24% rain chance

  • 🏛️
    Cultural tourists

    Comfortable conditions for exploring museums and sites

  • 💑
    Honeymoon couples

    Wedding score 97/100 with romantic weather conditions

  • 💼
    Business travelers

    Climate-controlled meetings unaffected by weather

Who Should Avoid

  • 💰
    Budget travelers

    Peak season means premium prices everywhere

  • 💼
    Business travelers

    Storm season may cause flight disruptions

930 observations30-year historical data
Confidence: 99%

"According to 30YearWeather's analysis of 30 years of NASA POWER satellite data,Boston in August averages 27°C with 24% precipitation probability."

📊 Source: 30YearWeather.com🛰️ Data: NASA POWER (1991-2021)View Methodology →

Frequently Asked Questions: Boston in August

What are the temperatures in Boston in August?

Daytime highs average 27°C, nights drop to 18°C. Temperatures remain fairly consistent.

How many rainy days in Boston in August?

Expect around 10 days with measurable rainfall. Rain is unlikely to disrupt plans.

What to wear in Boston in August?

Comfortable casual wear with a light jacket for evenings.

Is August peak season in Boston?

This is typically peak season with higher prices. Book 2-3 months ahead.