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
| 24 August 2026 Mon 21.3 ° C ( 70.3°F )  Fog |
Feels Like : 25 ° C / 77°F Humidity : % 99 Pressure : 1013 mb Wind Speed : 3.6 kmph / 2.2 miles from ENE 
Visibility : 0 km Precipitation (rainfall) : 0 mm Cloud (%) : 100 |
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 |
|---|---|---|---|---|---|---|---|
| 24 August 2026 Mon |  Sunny |
21.2 ° C | 37.5 ° C | 28.2 ° C | % 58 | 9 km/h | 7% |
| 25 August 2026 Tue |  Overcast |
22.9 ° C | 37.2 ° C | 27.1 ° C | % 72 | 8.3 km/h | 73% |
| 26 August 2026 Wed | Fog |
21.5 ° C | 37.1 ° C | 27.2 ° C | % 75 | 8.3 km/h | 67% |
| 27 August 2026 Thu | Sunny |
21.7 ° C | 37.5 ° C | 28.1 ° C | % 67 | 11.2 km/h | 57% |
| 28 August 2026 Fri | Sunny |
21 ° C | 37.3 ° C | 28.1 ° C | % 63 | 10.8 km/h | 5% |
| 29 August 2026 Sat | Sunny |
21 ° C | 35.8 ° C | 27.4 ° C | % 66 | 11.2 km/h | 9% |
| 30 August 2026 Sun | Sunny |
21.2 ° C | 37.7 ° C | 29.2 ° C | % 55 | 10.1 km/h | 4% |
| 31 August 2026 Mon | Sunny |
20.7 ° C | 37.1 ° C | 28.5 ° C | % 56 | 9.7 km/h | 4% |
| 01 September 2026 Tue | Overcast |
21.1 ° C | 37.7 ° C | 28.6 ° C | % 58 | 8.3 km/h | 8% |
| 02 September 2026 Wed | Sunny |
20.6 ° C | 38.3 ° C | 29 ° C | % 57 | 9.7 km/h | 4% |
| 03 September 2026 Thu | Sunny |
21 ° C | 35.2 ° C | 26.4 ° C | % 76 | 9.4 km/h | 71% |
| 04 September 2026 Fri | Fog |
21.3 ° C | 36.8 ° C | 26.9 ° C | % 74 | 11.2 km/h | 19% |
| 05 September 2026 Sat | Sunny |
21.1 ° C | 37.3 ° C | 28 ° C | % 63 | 10.1 km/h | 8% |
| 06 September 2026 Sun | Sunny |
20.7 ° C | 36.1 ° C | 27.8 ° C | % 64 | 11.2 km/h | 5% |
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