What is the weather like in Bali in September?

Expect temperatures between 24°C and 27°C with 16% average rain probability and about 8 hours of sunshine daily.

What is the weather like in Bali in September?

Bali in September scores 62/100 based on 30 years of climate data. A reasonable choice for your trip.

Who should visit Bali in September?

September in Bali is ideal for: Beach lovers, Outdoor enthusiasts, Cultural tourists, Honeymoon couples, Business travelers.

Bali Weather in September | 30-Year Forecast

Avg High

27°C

Hottest around day 26

Avg Low

24°C

Coolest around day 15

Rainy Days

0days

16% avg rain chance

Sunshine

8hrs/day

Autumn season

Sea Temperature in September

Bali Sea(Laut Bali)

28.3°C

Monthly Average

Water Feel

🌴Tropical

Perfect for swimming and water sports

Swim Rating

✅Excellent for swimming

Based on average sea surface temperature

Body of Water

Bali Sea

Laut Bali

Bali coastline

Essential Travel Info for Bali

🗓️ Best Time to Visit 📖 Travel Guide 🍴 Food Guide

Currency

IDR

Rp Indonesian rupiah

Language

Indonesian

Driving

Left side

Connect

Unfortunately, it is very unlikely you w...

Safety

High Safety

GPI: 1.8

Travel Intelligence

Exclusive flight analytics & health data for Bali

Smart Flight Estimator

Airport-to-Airport Logistics

unlock smart flight estimates

Add your home location in settings to see airport details.

Flight Connectivity Analysis

Airport traffic data & seasonal patterns

Moderate

52/ 100

Traffic Index

Balanced traffic

Peak Daily Arrivals

slots per day

Peak

Jun

Low

Oct

Monthly Traffic Distribution

214

Jan

219

Feb

218

Mar

186

Apr

190

May

222

Jun

204

Jul

217

Aug

213

Sep

151

Oct

180

Nov

210

Dec

Traffic Level

Low Season

Key Connections

Jakarta Soekarno-Hatta (CGK)

Singapore Changi (SIN)

Kuala Lumpur (KUL)

Surabaya Juanda (SUB)

Perth International (PER)

Health & Safety Advisory

CDC travel health recommendations

11 Recommendations

COVID-19

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

Chikungunya

All travelers should take steps to prevent mosquito bites. Chikungunya vaccination is generally not recommended. Travelers who wish to consider vaccination can visit “What to consider before traveling” on thechikungunya vaccinespage to learn more.

Hepatitis A

Recommended for unvaccinated travelers one year old or older going to Indonesia.Infants 6 to 11 months old should also be vaccinated against Hepatitis A. The dose does not count toward the routine 2-dose series.Travelers allergic to a vaccine component should receive a single dose of immune globulin, which provides effective protection for up to 2 months depending on dosage given.Unvaccinated travelers who are over 40 years old, are immunocompromised, or have chronic medical conditions planning to depart to a risk area in less than 2 weeks should get the initial dose of vaccine and at the same appointment receive immune globulin.

Hepatitis B

Recommended for unvaccinated travelers of all ages traveling to Indonesia.

Japanese Encephalitis

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 travel to areas with no clear Japanese encephalitis season.

Malaria

CDC recommends that travelers going to certain areas of Indonesia take prescription medicine to prevent malaria. Depending on the medicine you take, you will need to start taking this medicine multiple days before your trip, as well as during and after your trip. Talk to your doctor about which malaria medication you should take.Transmission areasAll areas of eastern Indonesia (the provinces of Maluku, North Maluku, East Nusa Tenggara, Papua, and West Papua), including the town of Labuan Bajo and the Komodo Islands in the Nusa Tenggara regionRural areas of Kalimantan (Borneo), West Nusa Tenggara (includes the island of Lombok), Sulawesi, and SumatraLow transmission in rural areas of Java, including Pangandaran, Sukabumi, and Ujung KulonNo malaria transmission in the cities of Jakarta (the capital) or UbudNo malaria transmission in the resort areas of Bali or Java, the Gili Islands, or the Thousand Islands (Pulau Seribu)Drug resistanceChloroquine (P. falciparumandP. vivax)SpeciesP. falciparum(60%)P. vivax(40%)P. knowlesi,6P. malariae, andP. ovale(rare)Recommended chemoprophylaxisAtovaquone-proguanil, doxycycline, mefloquine, tafenoquine3Updated April 23, 2025See footnotes

+5 more

Source: CDC Travelers' Health

View Complete Health Guide

Is September a Good Time to Visit Bali?

👌A reasonable choice for your trip(62/100)

Short Answer

Ideal beach conditions in Bali during September: 28.3°C turquoise waters, 27°C air, 16% rain. 1.5m calm waves suit families and swimmers alike.

Decision Factors

Vaccinations required

Yellow Fever

Warm tropical seas

28.3°C sea temperature - Tropical Bath

Seismically active region

16 earthquakes recorded in this month (30-year data)

Very high humidity

82% average humidity

Rough sea conditions

1.51m average wave height - Surfers Only

Peak tourist season

96% of annual peak - expect crowds and peak prices

Good For

🏖️
Beach lovers
28.3°C warm seas and 16% rain probability
🥾
Outdoor enthusiasts
Ideal hiking conditions: 27°C, 16% rain chance
🏛️
Cultural tourists
Comfortable conditions for exploring museums and sites
💑
Honeymoon couples
Wedding score 96/100 with romantic weather conditions
💼
Business travelers
Climate-controlled meetings unaffected by weather

Who Should Avoid

💰
Budget travelers
Peak season means premium prices everywhere
👴
Elderly travelers
82% humidity creates difficult conditions

"According to 30YearWeather's analysis of 30 years of NASA POWER satellite data,Bali in September averages 27°C with 16% precipitation probability."

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

Frequently Asked Questions: Bali in September

What are the temperatures in Bali in September?

Daytime highs average 27°C, nights drop to 24°C. Temperatures remain fairly consistent.

How many rainy days in Bali in September?

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

What to wear in Bali in September?

Comfortable casual wear with a light jacket for evenings.

Is September peak season in Bali?

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

Bali Weather in September