Grand-Santi Airport (GSI) 15 Day Weather Forecast, Grand-Santi French Guiana
Current weather conditions and 15 day weather forecast for Grand-Santi Airport in Grand-Santi, French Guiana including weather daily high/low temperature, warnings, chance of precipitation, pressure, humidity/wind chill, rain, wind speed, cloud, pressure, and UV index.
Current weather conditions at GSI
| 03 August 2026 Mon 26 ° C ( 78.9°F )  Partly Cloudy |
Feels Like : 28.1 ° C / 82.6°F Humidity : % 70 Pressure : 1011 mb Wind Speed : 4 kmph / 2.5 miles from NE 
Visibility : 10 km Precipitation (rainfall) : 0 mm Cloud (%) : 45 |
15-day weather forecast for Grand-Santi Airport, Grand-Santi, French Guiana
| Date | Weather forecast | Low temperature | High temperature | Average Temperature | Humidity | Wind | Chance of rain |
|---|---|---|---|---|---|---|---|
| 03 August 2026 Mon | Partly Cloudy |
20.2 ° C | 34 ° C | 25.1 ° C | % 78 | 7.2 km/h | 57% |
| 04 August 2026 Tue |  Fog |
20.1 ° C | 34.9 ° C | 25.6 ° C | % 76 | 7.9 km/h | 23% |
| 05 August 2026 Wed | Partly Cloudy |
20.2 ° C | 35 ° C | 26.2 ° C | % 72 | 9 km/h | 11% |
| 06 August 2026 Thu | Partly Cloudy |
21.4 ° C | 34.2 ° C | 25.7 ° C | % 76 | 8.6 km/h | 62% |
| 07 August 2026 Fri | Fog |
20.4 ° C | 35.4 ° C | 25.8 ° C | % 75 | 8.3 km/h | 17% |
| 08 August 2026 Sat | Partly Cloudy |
19.2 ° C | 36.3 ° C | 26 ° C | % 71 | 7.6 km/h | 9% |
| 09 August 2026 Sun |  Sunny |
20.7 ° C | 30.8 ° C | 25.3 ° C | % 76 | 7.6 km/h | 10% |
| 10 August 2026 Mon | Sunny |
19.9 ° C | 36.6 ° C | 26.8 ° C | % 66 | 9 km/h | 7% |
| 11 August 2026 Tue | Sunny |
20 ° C | 36.5 ° C | 26.8 ° C | % 69 | 5.8 km/h | 8% |
| 12 August 2026 Wed | Sunny |
20.8 ° C | 37 ° C | 26.6 ° C | % 73 | 7.9 km/h | 70% |
| 13 August 2026 Thu | Fog |
20.9 ° C | 36.4 ° C | 26.7 ° C | % 74 | 8.3 km/h | 72% |
| 14 August 2026 Fri | Fog |
21.8 ° C | 37 ° C | 27.1 ° C | % 72 | 5.8 km/h | 57% |
| 15 August 2026 Sat | Partly Cloudy |
21.3 ° C | 36.8 ° C | 27.3 ° C | % 69 | 8.6 km/h | 9% |
| 16 August 2026 Sun | Sunny |
20.8 ° C | 37.3 ° C | 26.9 ° C | % 71 | 9 km/h | 10% |
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