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CLIMATE · RAINFALL

The rainfall regime of the east

What sets the eastern Northeast apart from the dry backlands is a winter rainfall regime that, alone, made this land an agricultural frontier.

6 min readClimateMay 20, 2026

Everything in the SEALBA region begins with water. What sets the eastern Northeast apart from the dry-backland stereotype is a rainfall regime concentrated in winter — a climatic pattern that, alone, explains why this strip of land became an agricultural frontier.

Apr–Aug
main rainy season
rainfed
farming without intensive irrigation
east
coastal and tableland strip

Why it rains differently in the east

While the interior of the Northeast suffers from the irregularity of the semi-arid, the eastern strip — where SEALBA is concentrated — receives the influence of atmospheric systems that bring autumn and winter rain. The proximity of the ocean and the topography of the coastal tablelands help ensure more reliable and better-distributed precipitation in the period between April and August.

In the Northeast, the difference between failure and abundance almost always has the name of one word: rain.

What this enables

A reliable rainfall regime completely changes the possibilities:

The calendar advantage

The most valuable detail is the timing. Because the rain comes in winter, SEALBA's production cycle is shifted relative to the rest of Brazil, which plants in summer. This inverted calendar is a commercial advantage — the region harvests when national supply is scarcer.

Knowing the climate means producing better

For the producer, understanding the rainfall regime is not theory: it is the difference between a successful harvest and a failed one. Following the forecast, the history and the behavior of the seasons is an essential part of the agricultural decision. Bringing this climate intelligence to the producer, simply and accessibly, is one of the pillars of an ecosystem built for the reality of SEALBA.

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