Batam weather in July

In July, Batam sees average daytime highs of 28°C and overnight lows near 27°C, with 187 mm of rain across 22.9 wet days and about 12.1 hours of daylight. It is the 4th-warmest and 7th-wettest month of the year here.

Day-to-day highs hold fairly steady near 28°C through the month. The sky is clear or mostly clear about 15% of the time in July, and the air most often feels oppressive.

Daylight stretches from about 12 h 06 min at the start of July to 12 h 06 min by month's end. Set against the rest of the year, July is Batam's 2nd-clearest and 4th-windiest month. For the whole year in context, see Batam's year-round climate.

Daytime high
28°
4th warmest
Overnight low
27°
10th coldest
Rainfall
187 mm
22.9 wet days
Daylight
12 h 06 min
6:08 AM – 6:11 PM
Cloud cover
71%
2nd clearest
Wind
16 km/h
4th windiest
Solar energy
4.86 kWh/m²
Travel score
4.1
out of 10

Batam is city in Riau Islands Province, Indonesia.

Density
813/km²
people per km²
Founded
1829

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in July

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 28°C through the month.

A typical July day in Batam reaches about 28°C in the afternoon and slips back to 27°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 29°C. Set against its neighbours, July runs on par with June and on par with August.

24°26°28°30°32°151015202531
Avg high (°C)Avg low (°C)
12927
22927
32927
42827
52827
62827
72827
82827
92827
102827
112827
122827
132827
142827
152827
162827
172827
182827
192827
202827
212827
222827
232827
242827
252827
262827
272827
282827
292827
302827
312827

How July really feels in Batam

Once humidity and wind are folded in, July averages 31 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
31
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in July is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Batam weather by month

How July compares with the rest of the year at a glance. July is the 4th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 25°19819.111.94.9
Feb27° / 26°9712.9125.5
Mar28° / 26°14519.8124.7
Apr28° / 26°18225.2123.6
May29° / 27°21026.412.13.5
Jun29° / 27°19322.812.13.8
Jul28° / 27°18722.912.14.1
Aug28° / 26°16422.3124.1
Sep28° / 26°14819.9124.3
Oct28° / 26°19023.8124.0
Nov28° / 26°29027.811.93.5
Dec27° / 26°29824.811.94.0

Cloud cover in July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 15% of the time in July.

Beyond those clear spells, partly cloudy skies cover about 17% of July, with mostly cloudy or overcast conditions the remaining 67%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13565
23466
33466
43466
53367
63268
73268
83268
93169
103169
113169
123169
133169
143169
153169
163169
173169
183169
193268
203268
213367
223367
233367
243367
253367
263268
273268
283367
293466
303367
313367

Chance of precipitation in July

Any precipitation

Batam gets around 187 mm of rain over 22.9 wet days in July. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 74% and peaks near 78% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
176
276
376
477
577
677
777
877
978
1078
1178
1277
1377
1477
1577
1676
1776
1875
1974
2073
2173
2272
2371
2470
2569
2668
2767
2866
2966
3065
3165

Humidity in July

DryComfortableHumidMuggyOppressiveMiserable

Most of July feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, July lands in the oppressive band about 56% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Oppressive (%)Miserable (%)
14951
25050
35149
45248
55347
65347
75446
85446
95446
105545
115545
125545
135545
145545
155545
165644
175644
185644
195743
205743
215842
225842
235842
245941
255941
265941
276040
286040
296040
306139
316139

Wind in July

Winds average 16 km/h in July.

Across July, daily wind ranges from about 15 km/h on the calmest days to 17 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
115light breeze
215light breeze
315light breeze
415light breeze
515light breeze
615light breeze
715light breeze
816light breeze
916light breeze
1016light breeze
1116light breeze
1216light breeze
1316light breeze
1416light breeze
1516light breeze
1616light breeze
1716light breeze
1816light breeze
1916light breeze
2016light breeze
2116light breeze
2216light breeze
2316light breeze
2416light breeze
2516light breeze
2617light breeze
2717light breeze
2817light breeze
2917light breeze
3017light breeze
3117light breeze

Sunrise & sunset in July

DaylightNight

Daylight runs from about 12 h 06 min at the start of July to 12 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 0 minutes over July. Sunrise moves from 6:05 AM to 6:08 AM, and sunset from 6:09 PM to 6:12 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.16:056:09
212.16:056:09
312.16:066:10
412.16:066:10
512.16:066:10
612.16:066:10
712.16:066:10
812.16:076:10
912.16:076:11
1012.16:076:11
1112.16:076:11
1212.16:076:11
1312.16:076:11
1412.16:076:11
1512.16:086:11
1612.16:086:11
1712.16:086:11
1812.16:086:11
1912.16:086:12
2012.16:086:12
2112.16:086:12
2212.16:086:12
2312.16:086:12
2412.16:086:12
2512.16:086:12
2612.16:086:12
2712.16:086:12
2812.16:086:12
2912.16:086:12
3012.16:086:12
3112.16:086:12

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 4.86 kWh/m².

For context, solar energy here swings from a low near 4.24 kWh/m² to a high of 5.61 kWh/m² in March across the year — July's 4.86 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
14.8Bright
24.8Bright
34.8Bright
44.8Bright
54.8Bright
64.8Bright
74.8Bright
84.8Bright
94.8Bright
104.8Bright
114.8Bright
124.8Bright
134.8Bright
144.8Bright
154.8Bright
164.8Bright
174.9Bright
184.9Bright
194.9Bright
204.9Bright
214.9Bright
225.0Bright
235.0Bright
245.0Bright
255.0Bright
265.0Bright
275.0Bright
285.0Bright
295.1Bright
305.1Bright
315.1Bright
Planning a trip in July

Is July a good time to visit Batam?

Our two travel scores rate July for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

4.1
Sightseeing
5th-best month of the year
4.8
Beach & pool
6th-best month of the year

July is a reasonable time to visit Batam for sightseeing.

What to pack for Batam in July

From July's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In July, Batam sees daytime highs around 28°C and nights near 27°C. Pack light clothes and rain gear. Worth having: sun protection. About 23 days see rain.

light clothesrain gearsun protection

Sea temperature near Batam in July

The nearest coast averages about 29°C in July — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 27 km away) is warmest in May at about 30°C and coldest in January near 28°C.

The water stays above 20°C all year — warm enough for a swim any month.

26°28°30°32°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan28Warm
Feb28Warm
Mar29Tropical
Apr30Tropical
May30Tropical
Jun30Tropical
Jul29Tropical
Aug29Tropical
Sep29Tropical
Oct29Tropical
Nov29Tropical
Dec28Tropical

UV index in Batam in July

LowModerateHighVery highExtreme

Clear-sky midday UV in July peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Batam peaks around February 18 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 22 at about 10 (very high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeFeb 18UV 15Jun 22UV 10
UV index (midday)Level
Jan13Extreme
Feb15Extreme
Mar14Extreme
Apr13Extreme
May12Extreme
Jun10Very high
Jul10Very high
Aug13Extreme
Sep12Extreme
Oct13Extreme
Nov11Extreme
Dec11Extreme

Air quality in Batam in July

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where July falls, not just the annual average.

Air quality in Batam is worst in October — around 33 µg/m³ PM2.5 (moderate), about 2.4× the cleanest month (January, 14 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateOct 933 µg/m³Jan 2214 µg/m³
PM2.5 (µg/m³)Level
Jan14Moderate
Feb14Moderate
Mar15Moderate
Apr21Moderate
May25Moderate
Jun25Moderate
Jul25Moderate
Aug27Moderate
Sep33Moderate
Oct33Moderate
Nov22Moderate
Dec16Moderate
Location & terrain

Where is Batam?

Batam sits at 1.1°N, 104.0°E, 38 m above sea level, in Indonesia. The nearest listed city is Marine Parade, 21 km away.

Topography around Batam

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Batam.

Within 3 km, the terrain around Batam has only modest variations in elevation — a maximum elevation change of 79 m around an average of 15 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 164 m; within 80 km, large variations in elevation — a maximum elevation change of 656 m.

The land around Batam is covered by artificial surfaces (64%) within 3 km, water (55%) and trees (20%) within 16 km, and water (63%) and trees (25%) within 80 km.

3 km
79 m
16 km
164 m
80 km
656 m
treesgrasslandartificial surfacesbare terrainwatermangroves
July weather nearby: Marine Parade 21 km · Bedok New Town 22 km · Simei New Town 23 km · Ulu Bedok 23 km · Kembangan 23 km · Tampines New Town 24 km · Eunos 24 km · Geylang 24 km

Indonesia travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / F
230 V · 50 Hz
Prices
≈ 29% of US
price level, 2025
GDP per capita
$5,060
2025
Happiness
5.6 / 10
World Happiness, 2025
Safe drinking water
30%
of population, 2024
Homicide rate
0.3
per 100k, 2022
Road deaths
11.3
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Low
EF EPI 471
Religion
Muslim 87%Protestant 8%Roman Catholic 3%Hindu 2%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Batam (1.1494°, 104.0249°, elevation 38 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).