Climate Overview
The climate in Cabo Frio is warm and mild. The average annual temperature is 23°C and approximately 769mm of precipitation falls per year. November is the wettest month, receiving around 110mm of rainfall. Cabo Frio is in the Southern Hemisphere. The seasons are reversed — summer runs from December to February, while winter falls between June and August. The summer months are: March, February, January. The coldest months are August, July, September, when temperatures can drop to 20°C.
Temperature
Cabo Frio has relatively stable temperatures year-round, staying within a 6°C range. The warmest month is March, when average highs reach 26°C and the mean temperature sits around 25°C. August is the coolest month, with minimum temperatures around 20°C and an average of 21°C. Daily temperature variation is modest, with an average difference of 1°C between highs and lows.
Precipitation
Cabo Frio is a relatively dry area, receiving approximately 769mm of precipitation annually, which averages out to around 64mm per month. The wettest month is November, averaging 110mm of rainfall. March and December also tend to see above-average precipitation. The driest month is July, with just 27mm. That's 84mm less than November, the wettest month. Precipitation varies noticeably between seasons, with the first half (January to June) of the year generally seeing more rainfall.
Wind
Cabo Frio is relatively calm, with an average annual wind speed of 8km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is September, averaging 10km/h, though still comfortable for most outdoor activities. The calmest conditions occur in March, with average winds dropping to 7km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 3km/h gap between the calmest and windiest months.
Seasons
12 days until Winter
It is currently autumn in Cabo Frio, which began on March 20, 2026. Cabo Frio is in the Southern Hemisphere, where the seasons are reversed — spring starts in September, summer in December, autumn in March, and winter in June. The warmest period peaks in March at around 26°C, while the coldest stretch bottoms out in August near 20°C. Winter is next, beginning on June 21, 2026 — 12 days from now.
Spring
Temperatures range from 21 to 24°C. Precipitation is moderate at around 206mm for the season, averaging 69mm per month. Winds are generally light, averaging 9km/h. Light layers work well as temperatures warm through the season — a great time to be outdoors.
Summer
Temperatures range from 24 to 26°C. Precipitation is moderate at around 232mm for the season, averaging 77mm per month. Winds are generally light, averaging 8km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 22 to 26°C. Precipitation is moderate at around 220mm for the season, averaging 73mm per month. Winds are generally light, averaging 7km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 20 to 23°C. Rainfall is relatively light, with around 112mm over the season and a monthly average of 37mm. Winds are generally light, averaging 8km/h. A light jacket or sweater is usually sufficient, though cooler evenings may call for an extra layer.
Best Time to Visit
The best time to visit Cabo Frio is during January, April, May, June, July, August, September, October and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 23°C with modest rainfall averaging 54mm per month. By contrast, March can be uncomfortably hot with temperatures reaching 26°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.
Monthly Climate Data
The table below shows monthly climate averages for Cabo Frio based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.
