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Praia do Forno beach and bay seen from above in Arraial do Cabo

Arraial do Cabo relocation guide

Weather in Arraial do Cabo

Use the long-term pattern to choose a trial, then check the home and sea conditions for the actual day.

Climate period
1991 to 2020
Calculated from original daily model estimates.
Data type
Regional model grid
Not a local weather station.
Rain planning
Every month
All months have rainfall in this comparison.
Home comfort
Inspect the room
Test actual cooling and airflow.
On this page

The short answer

The modeled comparison has warmer average daily highs early in the year and lower monthly rainfall around July and August. Rain appears in every month. Use that pattern to plan a useful trial, then judge the actual home's airflow, cooling and damp. The coastal grid estimate cannot tell you whether a particular room is comfortable or a boat outing can run.

  • The chart uses regional modeled estimates, not a local station.
  • The calculation covers 1991 to 2020.
  • Monthly averages do not settle sea conditions.
  • Inspect the actual room and entrance after rain.

Our take

Read the comparison with its actual scope

Tool

Arraial do Cabo by month

MERRA2 model grid, not a station, 1991 to 2020 normals.

Average highAverage lowRain (mm)
59°68°77°86°0125250Jan: 185.4 mm of rainFeb: 120 mm of rainMar: 168.8 mm of rainApr: 94.8 mm of rainMay: 82 mm of rainJun: 49.6 mm of rainJul: 46.4 mm of rainAug: 48.8 mm of rainSep: 85.2 mm of rainOct: 102.6 mm of rainNov: 194.1 mm of rainDec: 211 mm of rainJan average high 80°FJan average low 76°FJanFeb average high 81°FFeb average low 76°FFebMar average high 80°FMar average low 77°FMarApr average high 79°FApr average low 75°FAprMay average high 76°FMay average low 72°FMayJun average high 75°FJun average low 70°FJunJul average high 74°FJul average low 69°FJulAug average high 74°FAug average low 69°FAugSep average high 74°FSep average low 69°FSepOct average high 75°FOct average low 71°FOctNov average high 76°FNov average low 72°FNovDec average high 79°FDec average low 74°FDec

Average highs range from 74°F to 81°F. Rainfall peaks at 211 mm a month. NASA POWER, 1991 to 2020 daily MERRA2 grid estimates (opens in a new tab)

The chart uses NASA POWER daily MERRA2 estimates for 1991 to 2020 at the requested town coordinate. Each year's monthly daily-high and daily-low means receive equal weight. Rainfall averages the thirty monthly totals. All 10,958 dates are present for each parameter.1,2,3

NASA describes a native meteorological grid of 0.5 degrees latitude by 0.625 degrees longitude. This is a regional modeled surface around a coastal town, not a thermometer at your home or a local weather station. Land, sea and individual rooms can differ from that broad comparison.4

In this calculation, February's mean daily high is 81°F (27.0°C), compared with 74°F (23.1°C) in August. Mean rainfall is 211.0 millimeters in December and 46.4 millimeters in July. These monthly averages do not describe sea temperature, wind or today's forecast.1

Test comfort where you will sleep and work

Both selected Praiana homes advertise air conditioning. Run the actual equipment, ask about servicing and read recent electricity bills. Check airflow, shade, damp and the condition of windows and doors in the rooms you will use. A feature in an advertisement does not settle comfort or running cost.5,6,7

Visit the working room at your normal hours and check the sleeping room when it matters. Decide how a power or internet interruption affects the household. Use remote work and utilities to agree the actual connection and appliance responsibilities.5,8

Inspect the actual approach and drainage

Look at the entrance, runoff, drains, visible damp and repairs. Ask the owner about past water entry and how you would reach the home after heavy rain. Check the school and care journey as well as the property itself.5,6,9

Follow current local warnings and avoid floodwater. A long-term rainfall value is not a property flood assessment or a guarantee that a particular approach remains usable. Keep a workable alternative for essential journeys.10

Check the conditions before the outing

Ask locally about currents, warning flags and lifeguard advice before swimming. Check the operator's current departure, route and cancellation arrangement for a boat trip. A historical beach image and monthly climate chart cannot certify an outing.10,11,12

Read weekends, safety and getting around for the rest of the day. Keep enough room in the plan to change the outing when conditions change.10,13,14

Questions people ask

Are these local weather-station normals?

No. They are 1991 to 2020 averages calculated from NASA POWER daily MERRA2 regional modeled estimates around the requested town point.

Does the July rainfall value mean no rain?

No. Every month in this comparison has rainfall. Check the current forecast, home approach and outing conditions for your dates.

Can this chart tell me the sea temperature or whether boats run?

No. It does not calculate sea temperature or operational conditions. Ask about the actual day, departure, route and cancellation arrangement.

What should I check in a home climate trial?

The actual sleeping and work rooms, airflow, cooling, damp, drains and final approach. Run the advertised equipment and ask about recent power bills.

Plan your move

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Sources and how we check them

Sources and how we check them14 sources

Every figure on this page comes from the official or primary source listed here. We checked them in . Rules and prices change, so confirm anything important with the source before you act on it.

  1. NASA POWER, 1991 to 2020 daily MERRA2 grid estimates (opens in a new tab)
  2. NASA POWER, daily API parameters and local solar time (opens in a new tab)
  3. NASA POWER, daily maximum and minimum temperature assessment (opens in a new tab)
  4. NASA POWER, MERRA2 meteorological methodology and spatial resolution (opens in a new tab)
  5. Imobiliária Praiana, Praia dos Anjos monthly rental, reference 828 (opens in a new tab)
  6. Imobiliária Praiana, Praia Grande monthly rental, reference 2993 (opens in a new tab)
  7. Enel, Rio de Janeiro account-holder change procedure, March 26, 2025 (opens in a new tab)
  8. Pontal Net TV, published residential service contract (opens in a new tab)
  9. Arraial do Cabo, Citizen Services Charter version 1.01 (opens in a new tab)
  10. UK FCDO, Brazil safety and security guidance (opens in a new tab)
  11. ICMBio, Arraial do Cabo marine extractive reserve (opens in a new tab)
  12. Wikimedia Commons, CASSIO AVILA Praia do Forno photograph and license (opens in a new tab)
  13. Brazilian Navy IEAPM, Oceanographic Museum visitor information, updated June 12, 2025 (opens in a new tab)
  14. Arraial do Cabo, municipal bus fares and passenger arrangements (opens in a new tab)

Praia do Forno, Arraial do Cabo, photographed August 4, 2013. Historical place context, not current swimming or access conditions. Hero photo by CASSIO AVILA, CC BY-SA 4.0 (opens in a new tab), from Wikimedia Commons (opens in a new tab).