What Is Southwest Monsoon May 2026

But let’s back up. What actually is it? The Southwest Monsoon is a seasonal wind pattern that brings heavy rainfall to India, Sri Lanka, Bangladesh, Myanmar, Thailand, Laos, Cambodia, Vietnam, and parts of Pakistan from June to September .

| Feature | | Northeast Monsoon | |--------|----------------------|----------------------| | Season | June–September | October–December | | Wind direction | Southwest → Northeast | Northeast → Southwest | | Moisture source | Arabian Sea | Bay of Bengal | | Affects | Most of India | Tamil Nadu, Kerala, Andhra | what is southwest monsoon

Unlike the "normal" winds that blow from land to sea at night, this one blows from the —and it carries an ocean’s worth of moisture. Why “Southwest”? Because the wind comes from the southwest direction . But let’s back up

Not just a drizzle. We’re talking sheets of rain that last for days or weeks. Not just a drizzle

If you live in South or Southeast Asia, you know the drill. After months of scorching heat (April and May feel like a hair dryer aimed at your face), the sky suddenly darkens. The wind shifts. The air smells like wet earth. And then—the rain comes.

And next time someone says “monsoon,” you can smile and say: “Actually, do you mean the southwest or the northeast?”

That dramatic weather shift?