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
| 21 December 2025 Sun 27.7 ° C ( 81.8°F )  Patchy rain nearby |
Feels Like : 29.8 ° C / 85.6°F Humidity : % 65 Pressure : 1007 mb Wind Speed : 6.5 kmph / 4 miles from NE 
Visibility : 10 km Precipitation (rainfall) : 0.02 mm Cloud (%) : 62 |
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 |
|---|---|---|---|---|---|---|---|
| 21 December 2025 Sun | Patchy rain nearby |
21 ° C | 33.3 ° C | 24.7 ° C | % 83 | 6.5 km/h | 74% |
| 22 December 2025 Mon | Patchy rain nearby |
20.6 ° C | 30.9 ° C | 24.4 ° C | % 85 | 6.5 km/h | 89% |
| 23 December 2025 Tue |  Moderate rain |
21.6 ° C | 29.9 ° C | 23.9 ° C | % 91 | 5.4 km/h | 80% |
| 24 December 2025 Wed | Moderate rain |
20.8 ° C | 28.6 ° C | 23.5 ° C | % 92 | 5.8 km/h | 87% |
| 25 December 2025 Thu | Patchy rain nearby |
20.5 ° C | 31.4 ° C | 22.8 ° C | % 92 | 5 km/h | 74% |
| 26 December 2025 Fri | Patchy rain nearby |
21.2 ° C | 33.2 ° C | 25.6 ° C | % 77 | 6.5 km/h | 69% |
| 27 December 2025 Sat | Patchy rain nearby |
21 ° C | 31.3 ° C | 24.6 ° C | % 84 | 5.8 km/h | 79% |
| 28 December 2025 Sun | Patchy rain nearby |
20.8 ° C | 32.2 ° C | 24.7 ° C | % 83 | 6.5 km/h | 64% |
| 29 December 2025 Mon | Patchy rain nearby |
20.9 ° C | 31.8 ° C | 24.6 ° C | % 85 | 6.1 km/h | 64% |
| 30 December 2025 Tue | Patchy rain nearby |
20.9 ° C | 31.4 ° C | 24.2 ° C | % 89 | 6.8 km/h | 85% |
| 31 December 2025 Wed | Patchy rain nearby |
21.5 ° C | 28 ° C | 24 ° C | % 93 | 7.6 km/h | 88% |
| 01 January 2026 Thu | Moderate rain |
21.5 ° C | 29.1 ° C | 23.6 ° C | % 94 | 7.6 km/h | 89% |
| 02 January 2026 Fri | Patchy rain nearby |
21.5 ° C | 29.4 ° C | 23.9 ° C | % 94 | 6.5 km/h | 82% |
| 03 January 2026 Sat | Patchy rain nearby |
20.9 ° C | 32.2 ° C | 25.2 ° C | % 80 | 7.2 km/h | 73% |
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