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

Nantucket Weather in August

Plan your August trip to Nantucket, United States. Based on 30 years of NASA data, expect temperatures of 21°C (high) to 20°C (low), with 21% rain probability and 8 hours of daily sunshine. Great conditions with only 5 rainy days expected.

Avg High
21°C

Hottest around day 12

Avg Low
20°C

Coolest around day 31

Rainy Days
5days

21% avg rain chance

Sunshine
8hrs/day

Summer season

Nantucket August Weather Calendar

Click any day to see detailed weather information

Currency

USD

$ United States dollar

Language

English

Driving

Right side

Safety

Moderate Safety

GPI: 2.44

Travel Intelligence

Exclusive flight analytics & health data for Nantucket

Smart Flight Estimator

Airport-to-Airport Logistics

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Flight Connectivity Analysis

Airport traffic data & seasonal patterns

Moderate
44/ 100
Traffic Index

Balanced traffic

Peak Daily Arrivals

0

slots per day

Peak

Aug

Low

Apr

Monthly Traffic Distribution

17
Jan
15
Feb
15
Mar
15
Apr
31
May
102
Jun
96
Jul
142
Aug
74
Sep
33
Oct
17
Nov
17
Dec
Traffic Level
Low Season

Key Connections

Boston General Edward Lawrence Logan (BOS)
Hyannis Barnstable Municipal Boardman Polando Field (HYA)
White Plains Westchester County (HPN)
Martha's Vineyard (MVY)
Teterboro (TEB)

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 Nantucket?

👌Good option with minor considerations
Short Answer

Tropical storm season is active in Nantucket during August. Average conditions (21°C, 21% rain) can be interrupted by severe weather. Monitor forecasts closely.

Decision Factors

Atlantic Hurricane season active

Atlantic zone - expect potential atlantic hurricane activity

Very high humidity

87% average humidity

Peak tourist season

100% of annual peak - expect crowds and peak prices

Ideal temperature range

21.4°C - perfect for sightseeing and outdoor activities

Plenty of sunshine

10.7h of sunshine daily

Good For

  • 🥾
    Outdoor enthusiasts

    Ideal hiking conditions: 21.4°C, 21% rain chance

  • 🏛️
    Cultural tourists

    Comfortable conditions for exploring museums and sites

  • 💑
    Honeymoon couples

    Wedding score 92/100 with romantic weather conditions

  • 💼
    Business travelers

    Climate-controlled meetings unaffected by weather

Who Should Avoid

  • 🏖️
    Beach lovers

    Sea temperature only undefined°C - too cold for comfortable swimming

  • 💰
    Budget travelers

    Peak season means premium prices everywhere

  • 👴
    Elderly travelers

    87% humidity creates difficult conditions

  • 💼
    Business travelers

    Storm season may cause flight disruptions

930 observations30-year historical data
Confidence: 95%

"According to 30YearWeather's analysis of 30 years of NASA POWER satellite data,Nantucket in August averages 21°C with 21% precipitation probability."

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

Frequently Asked Questions: Nantucket in August

What are the temperatures in Nantucket in August?

Daytime highs average 21°C, nights drop to 20°C. Temperatures remain fairly consistent.

How many rainy days in Nantucket in August?

Expect around 5 days with measurable rainfall. Rain is unlikely to disrupt plans.

What to wear in Nantucket in August?

Comfortable casual wear with a light jacket for evenings.

Is August peak season in Nantucket?

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