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Bay of Bengal News Today: Weather conditions over the Bay of Bengal are being closely monitored as India enters the post-monsoon period, when tropical weather systems and cyclones can develop over the Bay. On October 4, 2026, the India Meteorological Department (IMD) reported generally weak to moderate monsoon conditions over parts of the Bay of Bengal, with rain or thundershowers expected in several sea areas.
At present, the official IMD sea-area bulletin does not indicate a storm warning. Conditions are mainly smooth to slight across most parts of the Bay, although scattered or isolated thunderstorms are possible.
Bay of Bengal News Today: Top Headlines
- IMD issues latest Bay of Bengal weather update for October 4.
- No storm warning is currently in force in the latest sea-area bulletin.
- Rain and thunderstorms are possible over several parts of the Bay.
- North Bay of Bengal is experiencing weak to moderate monsoon conditions.
- Winds over the northwest Bay are mainly westerly at around 10–15 knots.
- Andaman Sea areas may experience scattered to fairly widespread rain or thunderstorms.
- West Bengal coastal areas could receive isolated rain or thundershowers.
- IMD is continuing to monitor the Bay of Bengal during the post-monsoon season.
- Weather systems developing over the Bay can influence rainfall across eastern and southern India.
- Cyclone formation remains an important weather concern during October, but a cyclone should not be declared without an official warning.
Bay of Bengal Weather Today
According to the latest IMD Sea Area Bulletin, issued on October 4, the southwest monsoon is weak to moderate over the North Bay of Bengal and East Central Bay of Bengal, while conditions are weaker across other parts of the Bay and Andaman Sea.
The bulletin reports scattered rain or thundershowers over the southwest Bay, while isolated rain and thunderstorms are possible over the west central, east central, northwest and northeast Bay. Sea conditions are generally smooth to slight.
These conditions can change as atmospheric circulation develops, which is why weather agencies continue to monitor the region.
No Storm Warning at Present
One of the most important points in the latest Bay of Bengal cyclone update is that the IMD’s October 4 sea bulletin currently lists “No Storm Warning.” This means there is no official storm warning in the bulletin for the relevant sea areas at the time of issuance.
This is important because social media reports can sometimes describe a developing weather disturbance as a cyclone before an official classification is issued. A low-pressure area, circulation or depression does not automatically mean that a cyclone will form.
People living along the Indian coastline should therefore rely on official IMD warnings rather than unverified cyclone claims.
Andaman Sea Weather Update
The Andaman Sea is also being monitored because weather systems developing in this region can influence the wider Bay of Bengal.
The IMD reported mainly northwesterly winds of around 5–10 knots over the North Andaman Sea, while variable winds of similar strength were reported over the South Andaman Sea. Rain or thunderstorms are possible in parts of the Andaman and Nicobar coastal region.
The latest coastal bulletin also issued a swell-related advisory for the Andaman and Nicobar coast. Waves with periods of approximately 15–21 seconds and heights of around 1.2–1.4 metres were forecast during October 4–5, with vessels and recreational activities advised to exercise caution.
West Bengal Coast Weather
The northern Bay of Bengal remains particularly important for West Bengal and neighbouring coastal areas.
The IMD forecast mainly westerly winds of 10–15 knots over the northwest Bay of Bengal. Rain or thundershowers are likely at one or two places along the West Bengal coast, while sea conditions are expected to remain smooth to slight.
The Regional Meteorological Centre in Kolkata has also issued weather warnings for parts of West Bengal. South Himalayan West Bengal and Sikkim were under a heavy-rain warning on October 4, with thunderstorm and lightning risks continuing in some areas over the following days.
Bay of Bengal Cyclone Risk in October
October is an important month for cyclone monitoring in the Bay of Bengal. As the southwest monsoon withdraws and atmospheric conditions change, tropical systems can develop over warm waters.
Recent meteorological discussions have highlighted the possibility of weather systems forming over the Bay during the post-monsoon period. However, forecasts several days ahead should be treated cautiously because the eventual track and intensity of a system can change considerably.
The IMD maintains a dedicated cyclone bulletin and continues to publish updates when significant systems develop.
Rainfall Impact on Andhra Pradesh and Telangana
Weather systems over the Bay can also influence rainfall across Andhra Pradesh and Telangana. A weather system over the Bay is currently associated with changing weather conditions across parts of the two states, with rain, thunderstorms and gusty winds possible in some districts.
Coastal Andhra Pradesh is particularly sensitive to Bay of Bengal disturbances because of its long coastline and exposure to systems moving westward or northwestward.
What People Should Watch Next
The main indicators to watch over the coming days are the development of any low-pressure area, depression, deep depression or tropical cyclone over the Bay of Bengal. Wind speed, atmospheric pressure, rainfall forecasts and the projected movement of any system will determine the potential impact on coastal states.
For travellers, fishermen and coastal communities, official weather bulletins should be checked regularly whenever a significant system develops
