30YearWeather
Gili Trawangan in September
Gili Trawangan weather in September - Indonesia
☀️Hot & Sunny

Gili Trawangan Weather in September

Plan your September trip to Gili Trawangan, Indonesia. Based on 30 years of NASA data, expect temperatures of 30°C (high) to 24°C (low), with 13% rain probability and 8 hours of daily sunshine. The Coastal Waters averages 29°C in September. Great conditions with only 0 rainy days expected.

Avg High
30°C

Hottest around day 25

Avg Low
24°C

Coolest around day 1

Rainy Days
0days

13% avg rain chance

Sunshine
8hrs/day

Autumn season

Sea Temperature in September

Coastal Waters(Ocean)

28.7°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
Coastal Waters

Ocean

Gili Trawangan coastline

Gili Trawangan September Weather Calendar

Click any day to see detailed weather information

Day 1
clear-day
Sunny
30°C1%
Day 2
clear-day
Sunny
30°C3%
Day 3
clear-day
Sunny
30°C6%
Day 4
clear-day
Sunny
30°C10%
Day 5
clear-day
Sunny
30°C11%
Day 6
clear-day
Sunny
30°C13%
Day 7
clear-day
Sunny
30°C13%
Day 8
clear-day
Sunny
30°C15%
Day 9
clear-day
Sunny
30°C15%
Day 10
clear-day
Sunny
30°C17%
Day 11
clear-day
Sunny
30°C16%
Day 12
clear-day
Sunny
30°C16%
Day 13
clear-day
Sunny
30°C14%
Day 14
clear-day
Sunny
30°C10%
Day 15
clear-day
Sunny
30°C11%
Day 16
clear-day
Sunny
30°C14%
Day 17
clear-day
Sunny
30°C15%
Day 18
clear-day
Sunny
30°C16%
Day 19
clear-day
Sunny
30°C19%
Day 20
clear-day
Sunny
30°C19%
Day 21
clear-day
Sunny
30°C17%
Day 22
clear-day
Sunny
30°C17%
Day 23
clear-day
Sunny
30°C19%
Day 24
clear-day
Sunny
30°C19%
Day 25
clear-day
Sunny
31°C16%
Day 26
clear-day
Sunny
31°C15%
Day 27
clear-day
Sunny
31°C13%
Day 28
clear-day
Sunny
31°C9%
Day 29
clear-day
Sunny
31°C7%
Day 30
clear-day
Sunny
31°C11%

Essential Travel Info for Gili Trawangan

🗓️ Best Time to Visit📖 Travel Guide🍴 Food Guide

Currency

IDR

Rp Indonesian rupiah

Language

Indonesian

Driving

Left side

Connect

There are severalinternet cafeson Trawan...

Safety

High Safety

GPI: 1.8

Travel Intelligence

Exclusive flight analytics & health data for Gili Trawangan

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

Remote
18/ 100
Traffic Index

Off the beaten path

Peak Daily Arrivals

0

slots per day

Peak

Mar

Low

Jul

Monthly Traffic Distribution

41
Jan
44
Feb
44
Mar
18
Apr
16
May
7
Jun
3
Jul
24
Aug
24
Sep
24
Oct
24
Nov
24
Dec
Traffic Level
Low Season

Key Connections

Jakarta Soekarno-Hatta (CGK)
Surabaya Juanda (SUB)
Denpasar-Bali Island Ngurah Rai (Bali) (DPS)
Bima-Sumbawa Island Muhammad Salahuddin (BMU)
Kuala Lumpur (KUL)

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 Gili Trawangan?

👌A reasonable choice for your trip
Short Answer

Expect challenging weather in Gili Trawangan during September - 30°C combined with 76% humidity creates a heat index of 37°C. Air conditioning and strategic planning are essential.

Decision Factors

Oppressive heat and humidity

30.3°C with 76% humidity - challenging conditions

Vaccinations required

Yellow Fever

Feels significantly hotter than 30.3°C

Heat index: 37°C due to 76% humidity

Warm tropical seas

28.7°C sea temperature - Hot Soup

Seismically active region

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

Excellent dry conditions

Only 13% rain probability - ideal for outdoor activities

Good For

  • 🏖️
    Beach lovers

    28.7°C warm seas and 13% rain probability

  • 📸
    Photographers

    11.2h sunshine, 55% clear skies for golden hour shots

  • 💑
    Honeymoon couples

    Wedding score 96/100 with romantic weather conditions

  • 💼
    Business travelers

    Climate-controlled meetings unaffected by weather

Who Should Avoid

  • 👴
    Elderly travelers

    Heat index of 37°C poses health risks

  • 🌡️
    Heat-sensitive visitors

    37°C feels-like temperature creates discomfort

Related Guides

Best Time to VisitWhen to AvoidGili Trawangan Overview
900 observations30-year historical data
Confidence: 99%

"According to 30YearWeather's analysis of 30 years of NASA POWER satellite data,Gili Trawangan in September averages 30°C with 13% precipitation probability."

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

Frequently Asked Questions: Gili Trawangan in September

What are the temperatures in Gili Trawangan in September?

Daytime highs average 30°C, nights drop to 24°C. Temperatures remain fairly consistent.

How many rainy days in Gili Trawangan in September?

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

What to wear in Gili Trawangan in September?

Light, breathable fabrics. Don't forget sunglasses and a hat.

Is September peak season in Gili Trawangan?

This is shoulder season—moderate prices and manageable crowds.