Chennai weather in August
Temperature, sea and sunshine in August: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in August
Poor
Best time to visit: January – February
What is the weather like in Chennai in August?
In August, Chennai is very hot: daytime highs average 33 °C, and even at night it stays warm at around 26 °C. The sea averages 28.7 °C – lovely and warm for swimming. Expect around 5 hours of sunshine a day. It is the rainy season: rain falls on about 16 days, totalling 100 mm. On about 29 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, August is not an ideal month for a holiday in Chennai.
August compared
How the weather changes from July to September. Tap a month to open it.
| JulyJul | AugustAug | SeptemberSep | |
|---|---|---|---|
| Score | 18 | 22 | 26 |
| Day | 34° | 33° | 33° |
| Night | 27° | 26° | 26° |
| Sea | 29° | 29° | 29° |
| Sun | 4 h | 5 h | 5 h |
| Rain days | 15 | 16 | 17 |
More details for August
- Daylight
- 12 h 34 min05:57 – 18:31
- UV index
- 13 · extremeclear sky, noon (estimate)All months
- Muggy days
- 31 daysdew point 18 °C or moreAll months
- Wind
- 19 km/haverage daily peakAll months
- Cloud cover
- 87 %on averageAll months
- Hot days
- 29 days30 °C or moreAll months
- Time zone
- UTC+5:30Asia/Kolkata
How the score comes together
- Temperatureweight 50 %24 %
- Sunshineweight 20 %27 %
- Few rainy daysweight 30 %16 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in August
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Water bottle – drink plenty
- Insect repellent
- Rain jacket or umbrella
Chennai in August: quick answers
Is Chennai hot in August?
Yes. In August, Chennai is very hot: daytime highs average 33 °C and nights stay around 26 °C. On about 29 days the thermometer climbs to 30 °C or more.
Can you swim in Chennai in August?
Yes. In August the sea averages 28.7 °C – lovely and warm for swimming.
Does it rain much in Chennai in August?
It rains often – on about 16 days, adding up to 100 mm.
Chennai month by month
The whole year in ChennaiAll destinations: IndiaWhere to go in AugustSea temperature in August
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences