8· 1 review
São Sebastião Whale Watching
São Sebastião offers one of the best spots in Brazil to see humpback whales, making this crossing a must for anyone visiting the region.
4 h
from US$ 102
Short answer
In May, São Sebastião averages highs of 26 °C (79 °F) and lows of 16 °C (61 °F), with about 123 mm of rain spread over roughly 9 days. May has moderate rainfall, usually in quick showers that do not spoil the whole day. Crowds tend to be moderate this month.
Climate · INMET (updated 2026)
Temperature
26 / 16 °C
high / low
Rain
123 mm
9 days
Daylight
10h57
sunset at 17:26
Crowds
Moderate
1 public holiday
What to expect in São Sebastião in May
Editor's tip
May brings fall to São Sebastião. In Brazil the seasons are the reverse of those in the Northern Hemisphere. Temperatures are pleasant, with highs of 26 °C (79 °F) and nights that still call for a light jacket. Crowds sit somewhere in the middle, with peaks on public holidays. Outside those dates, you can enjoy the place at an easy pace and spend less. Rain, when it comes, is usually brief and does not spoil the day.
Myllena Vieira · Editor at VisiteCrowds
Crowd level: moderate
Moderate crowds, with peaks on public holidays. Outside those dates, you can enjoy the place at a calmer pace.
Prices
Rates: moderate · ~R$ 412
Moderate prices outside public holidays, which push rates and crowds up. The average nightly rate for lodging in São Sebastião is around R$ 412 (Brazilian reais), depending on the date.
Tours and tickets
Things to do in São Sebastião in May
Where to stay
Hotels in São Sebastião
In May, demand in São Sebastião is moderate: most hotels have room, but public holidays fill them up. Compare rates and book a few weeks ahead.
Rates change with the dates: confirm the price on Booking.com.
What happens in May
No major fixed festivals in May, but public holidays (Labor Day) bring more people to the destination.
Public holidays in May: Labor Day (01/05). Expect more people and higher prices around these dates.
What to pack in May
Light jacket for the evening · nights of 16 °C (61 °F) Light clothing for the day · highs of 26 °C (79 °F) Rain jacket or umbrella · 9 days of rain in the month Sunscreen and sunglasses · strong sun on the tours Quick-dry clothing · humidity of 85% Comfortable walking shoes · you will be on foot much of the day
Looking for better weather?
Where the weather is good in May
These destinations have the best weather comfort for May, scored with the same calculation of rain, heat and humidity. Tap to see what the month is like in each one.
Torn between São Sebastião and another destination?
See São Sebastião next to the destinations that usually compete for the same trip: month-by-month weather, driving cost, ideal length of stay and travel style, side by side.
see all comparisons →