Climate Insights for Grand Isle Seaplane Base

The climate in Grand Isle Seaplane Base is warm and mild. The average annual temperature is 22°C and approximately 1426mm of precipitation falls per year. Grand Isle Seaplane Base receives a notable amount of rainfall throughout the year, including during its driest month. Grand Isle Seaplane Base is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: August, July, June. The coldest months are January, February, December, when temperatures can drop to 13°C.

Grand Isle Seaplane Base sees moderate temperature variation throughout the year, ranging from 13°C to 29°C. The warmest month is August, when average highs reach 29°C and the mean temperature sits around 29°C. January is the coolest month, with minimum temperatures around 13°C and an average of 15°C. Daily temperature variation is modest, with an average difference of 2°C between highs and lows. The sharpest temperature change occurs between October and November, with a 4°C shift in average temperatures.

Grand Isle Seaplane Base is a fairly wet location, receiving approximately 1426mm of precipitation annually, which averages out to around 119mm per month. The wettest month is August, averaging 204mm of rainfall. July and September also tend to see above-average precipitation. The driest month is February, with just 77mm. That's 127mm less than August, the wettest month. Precipitation varies noticeably between seasons, with the second half (July to December) of the year generally seeing more rainfall.

Grand Isle Seaplane Base is moderately windy, with an average annual wind speed of 27km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is January, averaging 32km/h, which can feel quite blustery and may affect outdoor activities. The calmest conditions occur in July, with average winds dropping to 22km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 10km/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 31km/h in winter, 29km/h in spring, 23km/h in summer, 27km/h in autumn.

It is currently spring in Grand Isle Seaplane Base, which began on March 20, 2026. Grand Isle Seaplane Base is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in August at around 29°C, while the coldest stretch bottoms out in January near 13°C. Summer is next, beginning on June 21, 2026 — 83 days from now.

The best time to visit Grand Isle Seaplane Base is during February, May, October and November, when the weather is most comfortable for travellers. During these months, average temperatures hover around 21°C with modest rainfall averaging 84mm per month. By contrast, August can be uncomfortably hot with highs reaching 29°C, while January is the coldest period with lows dropping to 13°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 Grand Isle Seaplane Base 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.