Gresik, Indonesia experiences average highs of 30°C (86°F) and lows of 26°C (79°F) throughout the year. Rainfall is frequent, averaging about 18 rainy days per month. Sunshine is abundant, averaging about 10 hours per day. High humidity combined with warm temperatures produces a tropical feel year-round. Average highs have stayed broadly stable across the available records.
Gresik, Indonesia Weather & Climate 2026
Monthly climate averages for Gresik, Indonesia. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: May–Oct 
Wetter season: Jan–Dec At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
3.4/10
Best: July, August
UV Index
8
High
Temperature 30°C / 26°C
Feels Like 36°C / 30°C
Rainy Days 18
Rainfall 158 mm
Sunshine 10 h
Humidity 78%
Wind Speed 12 km/h
Dew Point 24°C
Hottest Month
32°C
September
Avg Low 26°C
Rain 6 days
Coldest Month
25°C
July
Avg High 30°C
Rain 5 days
Driest Month
3 days
August
Avg High 31°C
Avg Low 25°C
Windiest Month
14 km/h
February (Gusts 30)
Sea Temperature
30°C – 32°C
Warmest water: November (
32.1°C
)
Worst Time to Visit
Consider avoiding January, March, November, December due to extreme heat, heavy rainfall, oppressive humidity.
Sun Position
Sunrise 05:39
Daylight 11.7h
Sunset 17:21
Live conditions —
Gresik on the map · live conditions
Gresik, Indonesia
- Continent
- Asia
- Country
- Indonesia
- City
- Gresik
- Population
- 73.6K
- Coordinates
- -7.15°, 112.66°
Seasonal Breakdown
Spring
Sep–Nov
Avg High 31°C
Avg Low 26°C
Rain 15 days/mo
Summer
Dec–Feb
Avg High 29°C
Avg Low 26°C
Rain 28 days/mo
Autumn
Mar–May
Avg High 30°C
Avg Low 26°C
Rain 22 days/mo
Winter
Jun–Aug
Avg High 30°C
Avg Low 25°C
Rain 6 days/mo
2/3 best months
Climate Charts
Based on historical averages (2016–2025)
Monthly Temperatures
High Low Shaded bands show the typical range across the available yearly records.
Line chart showing monthly temperatures. Jan: 29°C / 26°C . Feb: 29°C / 25°C . Mar: 30°C / 26°C . Apr: 30°C / 26°C . May: 30°C / 26°C . Jun: 30°C / 26°C . Jul: 30°C / 25°C . Aug: 31°C / 25°C . Sep: 32°C / 26°C . Oct: 32°C / 26°C . Nov: 30°C / 26°C . Dec: 30°C / 26°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 271 mm. Feb: 289 mm. Mar: 295 mm. Apr: 179 mm. May: 114 mm. Jun: 56 mm. Jul: 24 mm. Aug: 15 mm. Sep: 33 mm. Oct: 122 mm. Nov: 228 mm. Dec: 268 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 84%. Feb: 85%. Mar: 83%. Apr: 82%. May: 79%. Jun: 78%. Jul: 73%. Aug: 70%. Sep: 70%. Oct: 74%. Nov: 80%. Dec: 82%.
Monthly Wind Speed
Wind Speed Gusts
Bar chart showing monthly wind speed. Jan: 14 km/h . Feb: 14 km/h . Mar: 11 km/h . Apr: 9 km/h . May: 10 km/h . Jun: 11 km/h . Jul: 12 km/h . Aug: 13 km/h . Sep: 14 km/h . Oct: 12 km/h . Nov: 10 km/h . Dec: 11 km/h .
Sunshine
Sunshine
Sunshine: Jan: 9h. Feb: 9h. Mar: 10h. Apr: 10h. May: 10h. Jun: 11h. Jul: 11h. Aug: 11h. Sep: 11h. Oct: 11h. Nov: 10h. Dec: 9h.
Sea Temperature
Sea Temperature
Line chart showing monthly sea temperature. Jan: 31°C . Feb: 31°C . Mar: 32°C . Apr: 32°C . May: 31°C . Jun: 31°C . Jul: 30°C . Aug: 30°C . Sep: 30°C . Oct: 31°C . Nov: 32°C . Dec: 32°C .
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 8. Feb: UV 9. Mar: UV 9. Apr: UV 8. May: UV 8. Jun: UV 7. Jul: UV 7. Aug: UV 8. Sep: UV 9. Oct: UV 9. Nov: UV 9. Dec: UV 8.
Monthly Daylight Hours
Daylight 12h reference
Monthly Dew Point & Comfort
Dew Point Dry Comfortable Humid Muggy
Climate Trends
Average highs have stayed broadly stable across the available records. Average rainfall is trending drier by about 8 mm.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Sep 2025 · 31°C | Sep · 32°C |
| Coldest month | Jul 2025 · 25°C | Jul · 25°C |
| Wettest month | May 2025 · 445 mm | Mar · 295 mm |
| Windiest month | Feb 2025 · 16 km/h | Feb · 14 km/h |
Month-by-Month Weather Table
January
Wet 
February
Wet March
Wet April
Wet May
Poor June
Fair July best
Fair August best
Fair September
Fair October
Poor November
Wet December
Wet | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 29°C / 26°C | 35°C / 30°C | 29days (271 mm) Wet | 8.8h Good | 84% Humid | 8.4 Very High | Wet | View Details |
| February | 29°C / 25°C | 35°C / 30°C | 27days (289 mm) Wet | 9h Good | 85% Humid | 9.1 Very High | Wet | View Details |
| March | 30°C / 26°C | 36°C / 31°C | 30days (295 mm) Wet | 9.7h Good | 83% Humid | 8.6 Very High | Wet | View Details |
| April | 30°C / 26°C | 37°C / 31°C | 24days (179 mm) Wet | 10.1h Excellent | 82% Humid | 8.3 Very High | Wet | View Details |
| May | 30°C / 26°C | 36°C / 31°C | 13days (114 mm) Wet | 10.3h Excellent | 79% Humid | 7.5 Very High | Poor | View Details |
| June | 30°C / 26°C | 35°C / 31°C | 10days (56 mm) Wet | 10.6h Excellent | 78% Humid | 7.2 Very High | Fair | View Details |
| July best | 30°C / 25°C | 34°C / 29°C | 5days (24 mm) Good | 10.7h Excellent | 73% Muggy | 7.4 Very High | Fair | View Details |
| August best | 31°C / 25°C | 35°C / 29°C | 3days (15 mm) Excellent | 11h Excellent | 70% Muggy | 8.3 Very High | Fair | View Details |
| September | 32°C / 26°C | 36°C / 30°C | 6days (33 mm) Good | 10.9h Excellent | 70% Muggy | 9.1 Very High | Fair | View Details |
| October | 32°C / 26°C | 37°C / 31°C | 14days (122 mm) Wet | 10.9h Excellent | 74% Muggy | 9.2 Very High | Poor | View Details |
| November | 30°C / 26°C | 37°C / 31°C | 26days (228 mm) Wet | 9.7h Good | 80% Humid | 8.7 Very High | Wet | View Details |
| December | 30°C / 26°C | 36°C / 31°C | 29days (268 mm) Wet | 9.1h Good | 82% Humid | 8.3 Very High | Wet | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Gresik are July, August, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Gresik, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Gresik is September, with average daytime highs of 32°C (89°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Gresik is July, with average overnight lows of 25°C (77°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Gresik is March, averaging 295mm of precipitation across 30 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Gresik runs through March, January, December, February, with the heaviest rainfall in March. Based on 10-year averages for Gresik.
Gresik receives approximately 121 sunshine hours per year. The sunniest month is August with around 11 hours. Based on climate data for Gresik.
The least favorable months to visit Gresik are January, March, November, December, primarily due to extreme heat, heavy rainfall, oppressive humidity. For the best conditions, consider July, August instead.
The annual average UV index in Gresik is 8, classified as high. SPF 30+ sunscreen, sunglasses, and seeking shade between 10:00–16:00 are strongly recommended.
Average humidity in Gresik is 78%, classified as humid. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
Yes — sea temperatures in January, February, March, April, May, June, July, August, September, October, November, December average 31°C (88°F), which is warm and comfortable for swimming and water activities.
Average wind speeds in Gresik are 12 km/h (7 mph). The windiest month is February with peak winds reaching 14 km/h (9 mph) (gusts up to 30 km/h / 18 mph).
Gresik averages 2 clear-sky days per month with overall cloud cover around 70%. The clearest skies occur in August.
The annual average dew point in Gresik is 24°C (75°F), which feels oppressively humid. Expect heavy perspiration during warmer months — stay hydrated and take breaks in air-conditioned spaces.
Gresik has a Tropical Monsoon climate, classified as Am under the Köppen system. Tropical climates are warm year-round with high rainfall and temperatures rarely dropping below 18°C (64°F).
The 'feels like' temperature in Gresik ranges from 30°C (86°F) to 36°C (97°F) on average. Humidity and radiant heat mean it often feels warmer than the thermometer reads, especially in summer months.
June is not the best time to visit Gresik, with a climate score of 4.7/10. Consider visiting during July, August instead for better conditions.
For June in Gresik, pack Umbrella, Waterproof jacket, Breathable clothing, Sunscreen (SPF 30+), Sun hat. With average highs of 30°C (86°F) and 10 rainy days, these essentials will keep you comfortable.
Data Source
Climate data derived from ERA5 reanalysis (ECMWF), averaged over 2016–2025. Sea surface temperature from marine reanalysis data. Climate scores and seasonal estimates are computed by WorldStats.
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