The best times to visit Ilha Grande Bay for ideal weather are
April 30th to October 7th
based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.
Ilha Grande Bay Travel Guide
Other Ilha Grande Bay Travel Info
Weather in Ilha Grande Bay
Average temperatures in Ilha Grande Bay vary little. Considering humidity, temperatures feel hot for about half of the year and otherwise nice with a very low chance of rain throughout the year. The area is more temperate than most — in the 61st percentile for pleasant weather — compared to tourist destinations worldwide. Weeks with ideal weather are listed above. If you’re looking for the very warmest time to visit Ilha Grande Bay, the hottest months are February, January, and then December. See average monthly temperatures below. The warmest time of year is generally early February where highs are regularly around 92.5°F (33.6°C) with temperatures rarely dropping below 75.4°F (24.1°C) at night.
Ilha Grande Bay Temperatures (Fahrenheit)
Ilha Grande Bay Temperatures (Celsius)
The way we experience weather isn’t all about temperature. Higher temperatures affect us much more at higher humidity, and colder temperatures feel piercing with high winds. Our perceived temperatures factor in humidity and wind chill to better represent how hot or cold the day feels to a person.
Ilha Grande Bay Perceived Temperature (F)
Ilha Grande Bay Perceived Temperature (C)
Average Ilha Grande Bay Temperatures by Month
Daily highs (averaged for the month) usually give the best indication of the weather. A significantly lower mean and low generally just means it gets colder at night.
|Month||Avg. High (°F)||Avg. Mean (°F)||Avg. Low (°F)|
|Month||Avg. High (°C)||Avg. Mean (°C)||Avg. Low (°C)|
Precipitation (Rain or Snow)
If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Ilha Grande Bay are August, February, and then June. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around late January. For example, on the week of January 22nd there are no days of precipitation on average. By contrast, it’s most likely to rain or snow in early to mid December with an average of 1 days of significant precipitation the week of December 10th.
When can you find snow in Ilha Grande Bay? Weather stations report no annual snow. Please note that a value of 0 for snow in the graph below may either mean there was no snow, or that snow is unreported.
Chance of Precipitation
The graph below shows the % chance of rainy and snowy days in Ilha Grande Bay.
Snow on the Ground
The graph below shows the average snow on the ground in Ilha Grande Bay (in).
Average Rain and Snow by Month
|Month||Daily Chance of Rain||Average Snow Depth (in)||Total Precipitation (in)|
|Month||Daily Chance of Rain||Average Snow Depth (cm)||Total Precipitation (cm)|
Humidity and Wind
Ilha Grande Bay has some very humid months, and above average humidity throughout the year. The least humid month is February (61.4% relative humidity), and the most humid month is June (70.1%).
Wind in Ilha Grande Bay is usually calm. The windiest month is October, followed by November and September. October’s average wind speed of around 6.8 knots (7.9 MPH or 12.7 KPH) is considered “a light breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in late September where average top sustained speeds reach 15 knots, which is considered a moderate breeze.
Relative Humidity (%)
The graph below shows the average % humidity by month in Ilha Grande Bay.
The graph below shows wind speed (max and average) in knots.
Average Wind Speeds
Show Wind Speeds
All wind speeds are in knots. 1 knot = 1.15 MPH or 1.85 KPH.
|Month||Avg. Wind||Avg. Wind Feel||Sustained High Wind||High Wind Feel|
|Jan||6||Light breeze||14.3||Significant breeze|
|Feb||6.2||Light breeze||14.1||Significant breeze|
|Mar||5.7||Light breeze||13.4||Significant breeze|
|Apr||5.4||Light breeze||12.6||Significant breeze|
|May||4.8||Light breeze||10.8||Significant breeze|
|Jun||4.5||Light breeze||10.5||Gentle breeze|
|Jul||4.8||Light breeze||10.9||Significant breeze|
|Aug||5.7||Light breeze||12.2||Significant breeze|
|Sep||6.4||Light breeze||13.8||Significant breeze|
|Oct||6.8||Light breeze||14.3||Significant breeze|
|Nov||6.5||Light breeze||14.1||Significant breeze|
|Dec||6.3||Light breeze||14.5||Significant breeze|
Show Relative Humidity by Month
|Month||Avg. Relative Humidity|
Is it Safe to Travel to Ilha Grande Bay?
Our best data indicates this area is somewhat safe. As of Dec 04, 2023 there are travel warnings for Brazil; exercise a high degree of caution. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories. This advisory was last updated on Nov 24, 2023.
The Busiest and Least Crowded Months
The busiest month for tourism in Ilha Grande Bay, Brazil is July, followed by January and June. Prices for hotels and flights will be most expensive during these months, though you can save if you purchase well in advance. Tourists are unlikely to visit Ilha Grande Bay in October. Those willing to visit at these times will likely find it the least expensive month.
Estimated Tourism by Month
Most Popular Months to Visit
Overall Ilha Grande Bay Travel Experience by Season
Fall (March through May)
Humidity and temperatures combine to make this season feel warm. Highs range from 89.3°F (31.8°C) and 78.6°F (25.9°C) with colder temperatures in the later months. Rain is rare with 1 to 2 days of significant precipitation per month. Fall is the second busiest for tourism, which makes it a good time for those looking for things to do.
Winter (June through August)
The middle-year months have very comfortable weather with high temperatures that are comfortable. These months see the least precipitation with 0 to 1 days of precipitation per month. June – August is the busiest season for tourism in Ilha Grande Bay, so lodging and other accommodations may cost more than usual.
Spring (September through November)
Spring daily highs range from 85.2°F (29.6°C) and 80.2°F (26.8°C), which will feel very nice given the humidity and wind. It rains or snows a normal amount: 2 to 3 days per month. Tourism is the slowest during these months due to the weather, so hotels may be affordably priced.
Summer (December through February)
Weather is perfect this time of year in Ilha Grande Bay to be enjoyable for warm weather travelers. The average high during this season is between 92.5°F (33.6°C) and 86.1°F (30.1°C). On average, it rains or snows a smalll amount: 0 to 2 times per month. These times of year are fairly slow with tourists.