The spinning columns of air and mist known as waterspouts are whirlwinds that form over water and reach up toward a cloud, and they appear from time to time off India’s coasts, in the Arabian Sea, the Bay of Bengal and over large lakes. Most are brief and weak, a slender grey rope dangling from a swelling cloud for a few minutes before it fades, but a few are strong enough to threaten small boats and, on rare occasions, to move ashore and do damage. This explainer, last reviewed on 3 November 2026, covers how they form, the two main types, where Indians have most often seen them and what to do if one appears.
A waterspout can look spectacular in photographs, and videos from the Mumbai seafront, the Konkan and Tamil Nadu coasts have repeatedly gone viral, usually with the caption “tornado at sea”. The reality is more nuanced. Most are the mild, fair-weather kind that rarely hurt anyone, while the dangerous variety is closely related to severe thunderstorms and tornadoes.
| Topic | Waterspouts off India’s coasts |
|---|---|
| What it is | A rotating column of air over water, usually showing a condensation funnel and a spray ring |
| Two types | Fair-weather waterspouts and tornadic waterspouts |
| Typical duration | Often a few minutes to around twenty minutes |
| Typical strength | Mostly weak; tornadic ones can be stronger |
| Where reported in India | Off Mumbai and the Konkan, Gujarat, Kerala, Tamil Nadu, Andhra and Odisha coasts, plus large lakes and estuaries |
| Usual seasons | Pre-monsoon, monsoon onset and post-monsoon |
| Main risk | Small boats, fishing vessels and coastal beaches if one moves ashore |
Key Takeaways
- A waterspout is a rotating column of air over water, connected to a cumulus or cumulonimbus cloud, and it is usually made visible by a condensation funnel above and a swirling spray ring on the sea surface.
- There are two kinds: fair-weather waterspouts, which are weak and short-lived, and tornadic waterspouts, which are tornadoes that form over land or water in severe thunderstorms and can be much stronger.
- In India, waterspouts are most often reported from coastal waters off the Konkan, Mumbai, Gujarat, Kerala, Tamil Nadu and the Bay of Bengal coasts, particularly in the pre-monsoon and monsoon-transition periods.
- The water in the visible funnel is mostly condensed cloud droplets, not seawater sucked up from below, although a spray ring of real sea spray forms at the base.
- Most waterspouts last only a few minutes and weaken quickly when they reach cooler land, but fishermen, small-boat operators and beach visitors should stay well away because the winds around them can be strong and erratic.
- Reports are patchy because most waterspouts occur out of sight; many Indian sightings are known only through social media videos and local news.
What is a waterspout?
A waterspout is a vortex of rapidly rotating air that forms over a body of water and connects to the base of a cumulus or cumulonimbus cloud. It typically has a slim, rope-like or funnel-shaped column, a bright patch of rotating spray at the water surface and a darker, swirling core. The visible funnel is created when the pressure drop inside the vortex cools the air enough for water vapour to condense.
Waterspouts are classified into two main types, and the difference matters. Fair-weather waterspouts are small and relatively gentle, forming under growing cumulus clouds with no violent storm nearby. Tornadic waterspouts are simply tornadoes over water, descending from rotating thunderstorms, and they can reach the same range of intensities as land tornadoes, although most are on the weaker end.
The name leads many people to imagine a column of sea water drawn up into the sky. In reality, the funnel is mostly condensation, and the spray ring at the bottom is made of droplets whipped up by the circulation. Larger waterspouts can lift loose objects and spray, but the idea that they suck up a giant column of water is a myth.
How do waterspouts form?
Waterspouts form when warm water heats the air above it, creating a rising, unstable column that spins as it stretches upward under a growing cloud. Fair-weather waterspouts usually begin near the surface. A small swirl develops along a boundary where winds converge, such as a line where a land breeze meets a sea breeze or where two air streams collide over warm water. As a cumulus congestus cloud builds overhead, its updraft stretches the spinning air upward and tightens it into a vortex.
Researchers describe a typical sequence of stages. First comes a dark spot on the water surface, then a pattern of light and dark rings, followed by a spiral pattern and a spray ring. As the vortex strengthens, a funnel descends to meet the spray, and the waterspout reaches its mature phase. Then it decays as the parent cloud weakens or cold outflow cuts off the warm air supply.
Tornadic waterspouts follow the same logic as land tornadoes: a rotating thunderstorm updraft, or mesocyclone, produces a vortex that descends from cloud base to the water below. These form during severe weather, are linked with strong shear and are more likely to cause trouble to ships, fishing boats and coastal communities.
Where do waterspouts occur in India?
Waterspouts in India occur mainly along the coasts and over larger inland water bodies, with reports from the Arabian Sea and the Bay of Bengal. Sightings have been described off Mumbai and the Konkan coast, off Gujarat, near Kerala and Karnataka, off Tamil Nadu including the Chennai coast, and along the Andhra and Odisha shores. Large lakes, wide estuaries and reservoirs can also host them in the right conditions.
Coastal waters near the equator and in the tropics are warm for most of the year, and the pre-monsoon and transition seasons bring the necessary mix of heat, moisture and clashing winds. The Arabian Sea off the west coast experiences strong sea breezes, which converge with land flow in the afternoons, while the Bay of Bengal sees frequent thunderstorms and cyclonic disturbances, both of which provide the raw material.
It is likely that waterspouts occur far more often than they are recorded. Most pass out at sea, unseen by anyone, and are noticed only if a ship, a fishing boat or a shore-based camera happens to catch them. Smartphone videos have helped build a clearer picture of how common they are along crowded coastlines such as Mumbai’s.
When is the waterspout season in India?
Waterspouts in India are most often reported in the pre-monsoon months, around the arrival of the monsoon and in the post-monsoon period, although they can appear at other times when conditions are right. In the pre-monsoon months of April and May, the sea is at its warmest, and thunderstorms are common. Around the monsoon onset, the sudden changes in wind and the arrival of deep clouds can provide the lifting needed.
During the heart of the monsoon, strong steady winds and widespread cloud tend to reduce the sort of shear and focused convergence that favours small spinning vortices, although offshore troughs and squall lines can still produce them. The post-monsoon months of October and November, when sea temperatures remain high and cyclonic systems often form in the Bay of Bengal, are another period of heightened risk.
Time of day matters as well. Fair-weather waterspouts often form in the late morning and afternoon when convective clouds are building, whereas tornadic waterspouts follow the timing of the parent storms, which frequently peak in the evening.
| Feature | Fair-weather waterspout | Tornadic waterspout |
|---|---|---|
| Parent cloud | Growing cumulus congestus | Rotating thunderstorm (supercell) |
| Weather around | Often partly cloudy, no violent storm | Thunder, hail, strong winds |
| Formation | Rises from the water surface upward | Descends from the cloud downward |
| Strength | Usually weak | Weak to strong |
| Duration | Minutes to about twenty minutes | Can last longer |
| Movement | Slow, erratic | Moves with the storm |
Are waterspouts dangerous?
Most waterspouts are not very dangerous, but they can still be hazardous to small boats and to people on beaches, and the tornadic type can be seriously destructive. A typical fair-weather waterspout has winds that are far weaker than those of a major tornado, yet they are strong enough to capsize a small vessel, tear a sail or throw an inexperienced boater off balance.
The chief danger for India’s large fleet of small fishing boats and dinghies is being caught close to the vortex. The winds around a waterspout can change direction abruptly, and the surrounding sea may be churned into steep chop. Tornadic waterspouts accompanying severe thunderstorms bring their own set of hazards: lightning, heavy rain, hail and squall winds in addition to the vortex itself.
If a waterspout moves onto land, it generally weakens fast, but it is then technically a tornado or a weak landspout and can damage beach shacks, parked cars, tents, nets and small structures. Seafront crowds are at risk of injury from flying debris, and viewers sometimes underestimate how quickly a vortex can change course.
Can a waterspout come ashore in India?
A waterspout can come ashore, and when it does it is usually reclassified as a tornado or landspout, but it normally weakens quickly. When the vortex moves over land, it loses the warm, moist air that fed it from the sea and runs into friction from buildings and terrain. The funnel often becomes ragged and disappears within a short time.
There are exceptions. If the waterspout is tornadic and part of a strong storm, the parent cloud carries on over land and can keep the circulation alive or spawn another vortex. Reports along the Konkan and Mumbai coasts and parts of the east coast have described vortices that moved from sea to shore and caused damage to roofs, trees and small structures. Such events are uncommon but are a good reason to take warnings seriously.
Because a waterspout can drift unpredictably, people watching from the shore or a promenade should keep a safe distance and be prepared to move away rather than approach for a better photo.
What is the difference between a waterspout and a cyclone or a whirlpool?
A waterspout is a small, short-lived vortex of air, whereas a cyclone is a vast storm system hundreds of kilometres wide and a whirlpool is a spinning current in water. People often mix up the words because all of them involve rotation. A tropical cyclone is a massive ocean storm that forms over warm water, lasts for days and is driven by the heat of the sea. A waterspout may occasionally form within the rainbands of a cyclone, but it is a tiny feature within a much larger system.
A whirlpool, by contrast, is a rotating flow of water itself, produced by tidal currents or the shape of the channel. It forms in the water and spins on the surface, rather than in the air. A waterspout is a vortex of air that happens to touch the water.
Dust devils, tornadoes and waterspouts are close cousins, differing mainly in the surface they occur over and the cloud above them. A fair-weather waterspout can be thought of as the marine counterpart of a dust devil, while a tornadic waterspout is a tornado over water.
How can sailors, fishers and beachgoers stay safe?
Sailors, fishers and beachgoers can stay safe by watching the sky, keeping well away from any waterspout and heeding official marine and thunderstorm warnings. The standard advice for boat operators is to move away at right angles to the waterspout’s apparent track, rather than trying to outrun it in a straight line, and to keep a safe distance of at least a few kilometres where possible.
Fishing communities should listen for coastal alerts from the India Meteorological Department and from state fisheries and disaster management offices, which broadcast warnings for squalls, thunderstorms and cyclonic weather. Signs that a waterspout may be forming include a rapidly building cumulus tower, a dark patch on the water, a spray ring and a funnel descending from cloud base. If one appears, small boats should head toward the shore on a safe heading and secure loose gear.
Beachgoers should not approach a waterspout for a photograph or video. If a vortex moves ashore, retreat to a solid building away from the beach, stay clear of trees and lightweight structures and avoid standing near cars or kiosks that might be tossed.
Do waterspouts really suck up fish and water?
Waterspouts do not draw up a giant column of sea water, though a strong one can lift small objects and spray and, very rarely, small animals. The funnel is mostly condensed cloud water. Reports of fish raining from the sky are known from various countries, and strong waterspouts or tornadoes are often proposed as an explanation, but the evidence for any single event is usually anecdotal.
It is important to stress that such events are uncommon and that the idea of a waterspout draining a lake or lifting a ship is exaggerated. What a waterspout can do is stir up the surface, throw spray and debris and, if it is tornadic, cause more serious damage. Public understanding of this difference helps avoid both panic and complacency.
Bottom Line
Waterspouts off India’s coasts are rotating air columns that form over warm water beneath convective clouds. Most are the weak, fair-weather type that fades within minutes, but the tornadic variety belongs to severe thunderstorms and deserves respect. Fishermen, boaters and seafront visitors on the Konkan, Mumbai, Kerala, Tamil Nadu and Bay of Bengal coasts should treat any sighting as a cue to keep away and check the latest weather warning.
Frequently Asked Questions
What causes a waterspout?
A waterspout forms when warm water heats the air above it and a growing cumulus or thunderstorm cloud stretches a small spinning swirl upward into a vortex. Converging winds, such as where a sea breeze meets a land breeze, often provide the initial spin.
Are waterspouts common in India?
They are reported from time to time along the Arabian Sea and Bay of Bengal coasts, including Mumbai, the Konkan, Kerala and Tamil Nadu, but many probably go unseen out at sea. Smartphone videos have made recent sightings more visible.
What is the difference between a fair-weather and a tornadic waterspout?
A fair-weather waterspout forms under a growing cumulus cloud, is usually weak and lasts only minutes. A tornadic waterspout is a tornado over water, linked to a rotating thunderstorm, and can be stronger and more dangerous.
Can a waterspout reach land?
Yes, a waterspout can move ashore, where it is generally called a tornado or landspout and usually weakens quickly. Tornadic ones tied to strong storms may cause damage to roofs, trees and small structures near the coast.
Is a waterspout the same as a cyclone?
No. A waterspout is a small, short-lived vortex a few tens of metres wide, while a cyclone is a huge storm system hundreds of kilometres across that lasts for days. Waterspouts can sometimes form inside a cyclone’s outer bands.
What should I do if I see a waterspout from the shore?
Keep a safe distance, do not approach for photographs and move inside a solid building if it heads toward land. Boaters should steer away at right angles to its path and follow official marine warnings.
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