What is the weather like in Sydney in September?

Expect temperatures between 11°C and 20°C with 16% average rain probability and about 8 hours of sunshine daily.

What is the weather like in Sydney in September?

Sydney in September scores 66/100 based on 30 years of climate data. Recommended for planning your trip.

Who should visit Sydney in September?

September in Sydney is ideal for: Families with children, Elderly travelers, Outdoor enthusiasts, Photographers, Cultural tourists.

Sydney Weather in September | 30-Year Forecast

Avg High

20°C

Hottest around day 30

Avg Low

11°C

Coolest around day 1

Rainy Days

0days

16% avg rain chance

Sunshine

8hrs/day

Autumn season

Sea Temperature in September

Tasman Sea

18.7°C

Monthly Average

Water Feel

🏊Pleasant

Comfortable for most swimmers

Swim Rating

👍Good for swimming

Based on average sea surface temperature

Body of Water

Tasman Sea

Sydney coastline

Essential Travel Info for Sydney

🗓️ Best Time to Visit 📖 Travel Guide 🍴 Food Guide

Currency

AUD

$ Australian dollar

Language

English

Driving

Left side

Connect

See the Sydney district guides for local...

Safety

High Safety

GPI: 1.565

Travel Intelligence

Exclusive flight analytics & health data for Sydney

Smart Flight Estimator

Airport-to-Airport Logistics

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Flight Connectivity Analysis

Airport traffic data & seasonal patterns

Major Hub

98/ 100

Traffic Index

Extremely busy airport

Peak Daily Arrivals

slots per day

Peak

Dec

Low

Oct

Monthly Traffic Distribution

428

Jan

400

Feb

395

Mar

480

Apr

492

May

645

Jun

727

Jul

763

Aug

746

Sep

364

Oct

821

Nov

955

Dec

Traffic Level

Low Season

Key Connections

Melbourne (MEL)

Brisbane City Brisbane (BNE)

Gold Coast (OOL)

Adelaide (ADL)

Canberra (CBR)

Health & Safety Advisory

CDC travel health recommendations

6 Recommendations

COVID-19

All eligible travelers should be up to date with their COVID-19 vaccines. Please seeYour COVID-19 Vaccinationfor more information.

Hepatitis B

Recommended for unvaccinated travelers younger than 60 years old traveling to Australia. Unvaccinated travelers 60 years and older may get vaccinated before traveling to Australia.

Japanese Encephalitis

Japanese encephalitis is mainly a concern in the Murray River, and the Outer Torres Strait Islands area.Recommended for travelers whoAre moving to an area with Japanese encephalitis to liveSpend long periods of time, such as a month or more, in areas with Japanese encephalitisFrequently travel to areas with Japanese encephalitisConsider vaccination for travelersSpending less than a month in areas with Japanese encephalitis but will be doing activities that increase risk of infection, such as visiting rural areas, hiking or camping, or staying in places without air conditioning, screens, or bed netsGoing to areas with Japanese encephalitis who are uncertain of their activities or how long they will be thereNot recommended for travelers planning short-term travel to urban areas or traveling at times outside of the Japanese encephalitis season.

Measles

Cases of measles are on the rise worldwide. Travelers are at risk of measles if they have not been fully vaccinated at least two weeks prior to departure, or have not had measles in the past, and travel internationally to areas where measles is spreading.All international travelers should be fully vaccinated against measles with the measles-mumps-rubella (MMR) vaccine, including an early dose for infants 6–11 months, according toCDC’s measles vaccination recommendations for international travel.

Rabies

Dogs infected with rabies are not commonly found in Australia.If rabies exposures occur while in Australia, rabies vaccines are typically available throughout most of the country.Rabies pre-exposure vaccination considerations include whether travelers 1) will be performing occupational or recreational activities that increase risk for exposure to potentially rabid animals and 2) might have difficulty getting prompt access to safe post-exposure prophylaxis.Please consult with a healthcare provider to determine whether you should receive pre-exposure vaccination before travel.For more information, seecountry rabies status assessments.

Yellow Fever

CDC recommendations:Vaccine isnotrecommended.Country entry requirements:Direct travel from United States: Vaccine isnotrequired.Travel from countries with risk for YF virus transmission: Vaccine isrequiredfor travelers ≥1 year old; this includes >12-hour airport transits or layovers in countries with risk for YF virus transmission.3Updated April 23, 2025See footnotes

Source: CDC Travelers' Health

View Complete Health Guide

Is September a Good Time to Visit Sydney?

👍Recommended for planning your trip(66/100)

Short Answer

Perfect travel weather awaits in Sydney during September - 20°C highs, 66% humidity, and 16% rain probability make this an optimal time for outdoor activities.

Decision Factors

Vaccinations required

Yellow Fever

Ideal temperature range

20.2°C - perfect for sightseeing and outdoor activities

Health precautions needed

Be aware of: Leptospirosis, Melioidosis, Dengue

Plenty of sunshine

9.9h of sunshine daily

Shoulder season - balanced conditions

78% of peak - good value with moderate crowds

Good For

👨‍👩‍👧‍👦
Families with children
Comfortable 20.2°C temperatures and low 16% rain risk
👴
Elderly travelers
Comfortable 20.2°C temperature range with manageable humidity
🥾
Outdoor enthusiasts
Ideal hiking conditions: 20.2°C, 16% rain chance
📸
Photographers
9.9h sunshine, 62% clear skies for golden hour shots
🏛️
Cultural tourists
Comfortable conditions for exploring museums and sites

Who Should Avoid

Suitable for most traveler types

"According to 30YearWeather's analysis of 30 years of NASA POWER satellite data,Sydney in September averages 20°C with 16% precipitation probability."

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

Frequently Asked Questions: Sydney in September

What are the temperatures in Sydney in September?

Daytime highs average 20°C, nights drop to 11°C. Temperatures remain fairly consistent.

How many rainy days in Sydney in September?

Expect around 0 days with measurable rainfall. Rain is unlikely to disrupt plans.

What to wear in Sydney in September?

Layers are key. A medium-weight jacket and closed-toe shoes.

Is September peak season in Sydney?

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

Sydney Weather in September

Sea Temperature in September

Sydney September Weather Calendar

Essential Travel Info for Sydney

Travel Intelligence

Smart Flight Estimator

Flight Connectivity Analysis

Monthly Traffic Distribution

Key Connections

Health & Safety Advisory

COVID-19

Hepatitis B

Japanese Encephalitis

Measles

Rabies

Yellow Fever

Is September a Good Time to Visit Sydney?

Decision Factors

Good For

Who Should Avoid

Related Guides

Frequently Asked Questions: Sydney in September

What are the temperatures in Sydney in September?

How many rainy days in Sydney in September?

What to wear in Sydney in September?

Is September peak season in Sydney?