Yes. It organizes the lookup so conditions, forecast periods and weather information are easier to read and compare.
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CPTEC/INPE conditions, forecast and waves through BrasilAPI.
Weather forecasts look objective, but they rely on numerical models, probability and frequent updates. This tool queries CPTEC/INPE meteorological data through BrasilAPI and organizes four kinds of lookup: search a city by name, a multi-day forecast by city code, current conditions at an airport by ICAO code, and a wave forecast for the coast. Each forecast day carries a date, the sky condition, minimum and maximum temperatures and a UV index; airport conditions show temperature, humidity, wind, visibility and pressure; and the wave lookup reports wave height, wind direction and sea state. This section explains how to interpret that information with more context, including what to look at beyond a sun-or-rain icon and why short-range and long-range forecasts carry very different confidence levels. Use it to plan travel, outdoor activities, logistics or navigation, remembering that any forecast is an estimate that ages over time.
The tool talks to the CPTEC/INPE endpoints through BrasilAPI and splits the lookup into four modes. In city mode you type a name and get the list of municipalities CPTEC knows, each with its own code, that code is what opens the detailed forecast. In forecast mode, the city code plus a number of days returns the sequence of days with the predicted condition, minimum, maximum and UV index.
Airport mode uses the ICAO code (for example, SBGR for Guarulhos) and returns the current conditions measured at the station: temperature, humidity, wind, visibility and pressure. Wave mode, aimed at the coast, delivers a marine forecast per day, with wave height in meters, wind direction and the sea state. Every response also carries an update time, which tells you how recent the data is.
Say you want the forecast for São Paulo. Start in city mode by typing "São Paulo": the result list shows the municipality with its code. Feed that code into forecast mode and ask for 4 days, and you get each day with the sky condition, the low and high temperatures and the UV index, plus the time the data was updated.
For a flight, airport mode is more direct: enter the aerodrome's ICAO code, SBGR (Guarulhos), SBSP (Congonhas), SBRJ (Santos Dumont), and read the current conditions at that station. Anyone sailing or fishing along the coast uses wave mode with the coastal city's code to check wave height and sea state over the next few days.
The lookup helps you plan travel, outdoor events, logistics operations, flights and nautical activities, and to compare several days or cities quickly. Because the data comes straight from CPTEC/INPE, it serves as the Brazilian official reference for weather conditions and trends.
Even so, a forecast is an estimate: it is more reliable in the short term and loses accuracy as the horizon grows. Local phenomena, isolated showers and rapid changes in the atmosphere can slip past the model. For sensitive decisions, check the update more than once and treat the forecast as one input, not a certainty.
Paste the code into your HTML and the tool shows up on your page, without J-Kit's navigation and ads. It still runs in the browser of whoever visits your site.
<iframe
src="https://jkit.tools/embed/en-US/cptec-weather"
width="100%"
height="600"
style="border:0"
loading="lazy"
title="CPTEC Weather"
></iframe>These references help contextualize formulas, standards, APIs and limitations used on this page. They do not replace professional validation when a result has legal, financial, medical or operational impact.
Yes. It organizes the lookup so conditions, forecast periods and weather information are easier to read and compare.
Search a city and see the next days' forecast, or check an airport and the sea.
Search by name and click to see that city's full forecast.
Looked up in real time through J-Kit's secure backend, with validation, timeout and rate limiting. Nothing is stored on your device. Source: official Brazilian public data.