Monsoon 2026 August Forecast India: Strong Deficit Signal; East & Northeast to Remain Active
Key Takeaways:
- August 2026 rainfall likely at 92% of LPA, indicating a clear below-normal month
- 60% probability of below-normal rainfall, strongest deficit signal of the season
- East & Northeast India to see relatively better rainfall activity
- Northwest, Central & South India likely to face widespread rainfall deficits
The Southwest Monsoon 2026 is expected to weaken significantly during August, with rainfall projected at 92% of the Long Period Average (LPA).
In simple terms, August is likely to be a deficit month with widespread weakness, even as parts of eastern and northeastern India continue to receive relatively better rainfall.
'
What Do the Probabilities Say? (August Outlook Explained Simply)
The rainfall outlook for August shows a strong and dominant below-normal signal:
- 60% probability of Below Normal rainfall
- 20% probability of Normal rainfall
- 20% probability of Above Normal rainfall
This indicates a clear negative bias, with a high likelihood that large parts of India will experience reduced rainfall during one of the most critical monsoon months.
Unlike a typical peak monsoon phase, August is expected to witness prolonged weak spells with limited active phases, reducing overall rainfall efficiency.
Where Will It Rain More or Less? (State-wise & Regional Outlook)
The spatial distribution for August indicates an overall rainfall departure of around -8%, reinforcing a deficient monsoon phase at the national level.
- Better rainfall regions: East and Northeast India, including West Bengal, Bihar, parts of Odisha, and northeastern states, are likely to receive above-normal rainfall, supported by active Bay of Bengal systems.
- Normal rainfall pockets: Parts of Bihar, Chhattisgarh, and Odisha may witness near-normal rainfall, offering localized balance within an otherwise weak setup.
- Deficit regions (major concern): Northwest, Central, and South India, including Rajasthan, Gujarat, Madhya Pradesh, Maharashtra, Karnataka, Telangana, and Andhra Pradesh, are expected to experience below-normal rainfall, indicating a broad-based weakening of monsoon currents.
- Northwest India: A poor monsoon signal zone persists, suggesting weak penetration and suppressed rainfall activity.
Overall, the pattern reflects a fragmented and east-skewed monsoon, where rainfall remains concentrated in eastern sectors while much of the country experiences subdued conditions.
What Does This Mean for India?
The August outlook raises serious concerns for agriculture and water resources, particularly across central and northwestern India where consistent rainfall is critical during this phase.
While eastern regions may benefit from active rainfall, deficits across core agricultural zones could impact crop growth, soil moisture, and reservoir inflows.
The uneven distribution may also lead to localized flood risks in eastern India, alongside dry spells elsewhere, increasing intra-seasonal variability.
Major Weather Events: August 2025
A month of relentless monsoon intensity, August 2025 witnessed record-breaking rainfall in North India alongside devastating cloudbursts and persistent drought conditions in the East and Northeast.
- Dharali & Uttarkashi Cloudburst (Uttarakhand): On August 5, a high-intensity localized cloudburst near Gangotri Dham triggered massive landslides and flash floods along the Kheer Ganga river; at least 10 lives were lost, over 100 people went missing, and widespread destruction was reported in Dharali and Harshil, despite light rain recorded at nearby gauges.
- Historic Rainfall (Jammu & Kashmir): Jammu recorded 380 mm rainfall in 24 hours on August 27, breaking its 1973 record, while Udhampur witnessed an extreme 629.4 mm in a day, nearly double its previous record; widespread flooding, bridge collapses, and landslides disrupted major highways.
- Widespread Extremely Heavy Rainfall Events: Extremely heavy rainfall (>204.4 mm) was recorded on 93 occasions; major flooding occurred across Himachal Pradesh, Rajasthan, Gujarat, and Coastal Karnataka. Northwest India recorded its highest August rainfall since 2001 (34% above normal), while the South Peninsula was 31% above normal, with localized flooding in Kerala and interior Karnataka.
- Continued Deficit & Drought (East & Northeast India): Arunachal Pradesh, Assam, Meghalaya, and Bihar recorded rainfall deficits of up to 40%, with the Northeast experiencing its seventh-lowest rainfall since 1901, impacting Kharif crops due to uneven monsoon distribution.
Final Takeaway
August 2026 is expected to be a decisively weak monsoon month, marked by widespread rainfall deficits, strong regional contrasts, and limited support outside eastern and northeastern India, making it a critical stress phase for the season.
Related stories:
