The advancing monsoon is the phase of the Indian monsoon when the southwest monsoon winds move from the sea toward the land and bring widespread rain to most of India, mainly from June to September.

What is advancing monsoon?

  • It refers to the southwest monsoon winds that blow from the Indian Ocean and Arabian Sea toward the Indian subcontinent.
  • These winds are moisture-laden and cause heavy to moderate rainfall over most parts of India.
  • This phase usually begins in early June and continues through July, August, and September.
  • The onset of these rains is often sudden and strong, popularly called the “burst of the monsoon.”

Key features (Quick Scoop)

  • Direction of winds: From sea to land , generally from southwest to northeast over India.
  • Main rainy season: Brings the maximum share of annual rainfall to most of India, crucial for agriculture.
  • Coverage: After entering from the south (Kerala coast), it spreads northward and usually covers almost the entire country in about a month.
  • Moist winds: Winds are moist and cool , leading to cloudy skies, drop in temperature, and frequent showers.
  • Regional pattern:
    • Western Ghats receive very heavy orographic rainfall at the beginning.
* Northeast India (e.g., Assam, Meghalaya) gets some of the **heaviest rainfall in the country** during this phase.

Advancing vs retreating monsoon (in simple terms)

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Aspect Advancing monsoon Retreating monsoon
Wind direction Sea to land, mainly southwest to northeast.Land to sea, as winds withdraw.
Months June to September.October to November.
Rainfall amount Gives most of India’s annual rain.Much less overall; important mainly for parts of east and southeast India.
Moisture Moist winds, heavy showers.Relatively dry winds, with rainfall mainly along the east coast.

Why is it important today?

  • The advancing monsoon still controls sowing and yields of major crops like rice, cotton, and pulses across India.
  • Every year, news and forum discussions track: onset date over Kerala, monsoon progress, “monsoon break” periods, and impact on floods, droughts, and the economy.

Bottom note: Information gathered from public forums or data available on the internet and portrayed here.