Climate Overview
The climate in Grand-Popo is hot. The average annual temperature is 28°C and approximately 1045mm of precipitation falls per year. June is the wettest month, receiving around 220mm of rainfall. Grand-Popo sits near the equator, so seasonal temperature differences are minimal throughout the year.
Temperature
Grand-Popo has relatively stable temperatures year-round, staying within a 8°C range. The warmest month is March, when average highs reach 32°C and the mean temperature sits around 29°C. August is the coolest month, with minimum temperatures around 24°C and an average of 26°C. Daily temperature variation is modest, with an average difference of 4°C between highs and lows.
Precipitation
Grand-Popo is a moderately rainy area, receiving approximately 1045mm of precipitation annually, which averages out to around 87mm per month. The wettest month is June, averaging 220mm of rainfall. October and September also tend to see above-average precipitation. The driest month is January, with just 12mm. That's 208mm less than June, 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.
Wind
Grand-Popo is mildly breezy, with an average annual wind speed of 17km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is August, averaging 20km/h, though still comfortable for most outdoor activities. The calmest conditions occur in November, with average winds dropping to 14km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 6km/h between the calmest and windiest months. Wind tends to pick up during the summer months. The seasonal averages are 16km/h in winter, 18km/h in spring, 19km/h in summer, 16km/h in autumn.
Seasons
89 days until Summer
It is currently spring in Grand-Popo, which began on March 20, 2026. Grand-Popo sits near the equator, so the traditional four-season cycle is less pronounced — temperatures remain relatively stable year-round. The warmest period peaks in March at around 32°C, while the coldest stretch bottoms out in August near 24°C. Summer is next, beginning on June 21, 2026 — 89 days from now.
Spring
Temperatures range from 26 to 32°C. Precipitation is moderate at around 207mm for the season, averaging 69mm per month. Winds are moderate at around 18km/h. Light layers work well as temperatures warm through the season — a great time to be outdoors.
Summer
Temperatures range from 24 to 29°C. Rainfall is heavy, totalling around 411mm across the season with a monthly average of 137mm. Winds are moderate at around 19km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 25 to 31°C. Rainfall is heavy, totalling around 372mm across the season with a monthly average of 124mm. Winds are moderate at around 16km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 26 to 31°C. Rainfall is relatively light, with around 55mm over the season and a monthly average of 18mm. Winds are moderate at around 16km/h. A light jacket or sweater is usually sufficient, though cooler evenings may call for an extra layer.
Monthly Climate Data
The table below shows monthly climate averages for Grand-Popo 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.
