Climate Insights for Guaratuba

The climate in Guaratuba is warm and mild. The average annual temperature is 20°C and approximately 2336mm of precipitation falls per year. Guaratuba receives a notable amount of rainfall throughout the year, including during its driest month. Guaratuba 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: January, February, March. The coldest months are July, June, August, when temperatures can drop to 13°C.

Guaratuba sees moderate temperature variation throughout the year, ranging from 13°C to 28°C. The warmest month is January, when average highs reach 28°C and the mean temperature sits around 24°C. July is the coolest month, with minimum temperatures around 13°C and an average of 16°C. Daily temperature variation is modest, with an average difference of 7°C between highs and lows. The sharpest temperature change occurs between April and May, with a 3°C shift in average temperatures.

Guaratuba is a very wet location, receiving approximately 2336mm of precipitation annually, which averages out to around 195mm per month. The wettest month is January, averaging 372mm of rainfall. February and December also tend to see above-average precipitation. The driest month is July, with just 72mm. That's 299mm less than January, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.

Guaratuba is relatively calm, with an average annual wind speed of 10km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is November, averaging 11km/h, though still comfortable for most outdoor activities. The calmest conditions occur in June, with average winds dropping to 9km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 2km/h between the calmest and windiest months.

It is currently autumn in Guaratuba, which began on March 20, 2026. Guaratuba 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 January at around 28°C, while the coldest stretch bottoms out in July near 13°C. Winter is next, beginning on June 21, 2026 — 88 days from now.

The best time to visit Guaratuba is during July, when the weather is most comfortable for travellers. During these months, average temperatures hover around 16°C with modest rainfall averaging 72mm per month. By contrast, January can be uncomfortably hot with temperatures reaching 28°C. Despite being the best months overall, some rain is still likely — pack a waterproof layer and plan a mix of indoor and outdoor activities.

The table below shows monthly climate averages for Guaratuba 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.