Climate Insights for Isabela Island

The climate in Isabela Island is warm and mild. The average annual temperature is 23°C and approximately 665mm of precipitation falls per year. March is the wettest month, receiving around 190mm of rainfall. Isabela Island sits near the equator, so seasonal temperature differences are minimal throughout the year.

Isabela Island has relatively stable temperatures year-round, staying within a 7°C range. The warmest month is March, when average highs reach 27°C and the mean temperature sits around 26°C. September 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 2°C between highs and lows.

Isabela Island is a relatively dry area, receiving approximately 665mm of precipitation annually, which averages out to around 55mm per month. The wettest month is March, averaging 190mm of rainfall. April and February also tend to see above-average precipitation. The driest month is November, with just 12mm. That's 178mm less than March, 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.

Isabela Island is relatively calm, with an average annual wind speed of 12km/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 14km/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 7km/h gap between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 13km/h in winter, 13km/h in spring, 10km/h in summer, 9km/h in autumn.

It is currently winter in Isabela Island, which began on June 21, 2026. Isabela Island 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 27°C, while the coldest stretch bottoms out in September near 20°C. Spring is next, beginning on September 23, 2026 (2 days from now).

The best time to visit Isabela Island is during January, May, June, July, August, September, October, November and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 22°C with modest rainfall averaging 26mm per month. By contrast, March can be uncomfortably hot with temperatures reaching 27°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

The table below shows monthly climate averages for Isabela Island 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.