Climate Insights for Guaratuba

The climate in Guaratuba is warm and mild. The average annual temperature is 22°C and approximately 226mm of precipitation falls per year. December is the wettest month, receiving around 33mm of rainfall. 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: October, September, November. The coldest months are June, July, September, when temperatures can drop to 8°C.

Temperatures in Guaratuba vary considerably across the year, with a 21°C difference between the coldest and warmest months. The warmest month is October, when average highs reach 29°C and the mean temperature sits around 26°C. June is the coolest month, with minimum temperatures around 8°C and an average of 13°C. Daily temperature variation is modest, with an average difference of 4°C between highs and lows. The sharpest temperature change occurs between May and June, with a 7°C shift in average temperatures.

Guaratuba is a quite dry location, receiving approximately 226mm of precipitation annually, which averages out to around 19mm per month. The wettest month is January, averaging 33mm of rainfall. February and March also tend to see above-average precipitation. The driest month is May, with just 0mm. That's 33mm 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 4km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is December, averaging 7km/h, though still comfortable for most outdoor activities. The calmest conditions occur in August, with average winds dropping to 2km/h, making it an ideal period for wind-sensitive activities. Wind speeds vary significantly across the year, with a 5km/h difference between the calmest and windiest months. This level of variation is worth factoring into travel plans. Wind tends to pick up during the summer months. The seasonal averages are 2km/h in winter, 4km/h in spring, 6km/h in summer, 3km/h in autumn.

It is currently winter in Guaratuba, which began on June 21, 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 October at around 29°C, while the coldest stretch bottoms out in June near 8°C. Spring is next, beginning on September 23, 2026 — 16 days from now.

The best time to visit Guaratuba is during January, February, March, April, May, July, August, September and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 22°C with modest rainfall averaging 23mm per month. By contrast, October can be uncomfortably hot with highs reaching 29°C, while June is the coldest period with lows dropping to 8°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

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.