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 October 2026 Sat 29.1 ° C ( 84.4°F )  Patchy rain nearby |
Feels Like : 29.7 ° C / 85.5°F Humidity : % 49 Pressure : 1007 mb Wind Speed : 5.8 kmph / 3.6 miles from NNW 
Visibility : 10 km Precipitation (rainfall) : 0.01 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 |
|---|---|---|---|---|---|---|---|
| 03 October 2026 Sat |  Overcast |
20.6 ° C | 37.9 ° C | 27.1 ° C | % 69 | 12.6 km/h | 32% |
| 04 October 2026 Sun |  Sunny |
21.8 ° C | 38.5 ° C | 29.2 ° C | % 60 | 10.4 km/h | 6% |
| 05 October 2026 Mon | Sunny |
19.4 ° C | 38.8 ° C | 28.3 ° C | % 53 | 10.1 km/h | 2% |
| 06 October 2026 Tue | Sunny |
19.1 ° C | 39.3 ° C | 29.1 ° C | % 56 | 11.9 km/h | 4% |
| 07 October 2026 Wed | Sunny |
19.7 ° C | 39.7 ° C | 29 ° C | % 51 | 9.7 km/h | 2% |
| 08 October 2026 Thu | Sunny |
18.5 ° C | 40 ° C | 28.6 ° C | % 57 | 10.1 km/h | 3% |
| 09 October 2026 Fri | Sunny |
20 ° C | 40 ° C | 29.4 ° C | % 56 | 10.1 km/h | 4% |
| 10 October 2026 Sat | Sunny |
22.3 ° C | 39.9 ° C | 29.4 ° C | % 61 | 10.1 km/h | 57% |
| 11 October 2026 Sun |  Partly Cloudy |
20.7 ° C | 36.5 ° C | 26.8 ° C | % 76 | 10.1 km/h | 72% |
| 12 October 2026 Mon |  Fog |
20.4 ° C | 37.4 ° C | 26.5 ° C | % 75 | 10.4 km/h | 54% |
| 13 October 2026 Tue | Fog |
21.2 ° C | 39.4 ° C | 27.6 ° C | % 69 | 10.1 km/h | 36% |
| 14 October 2026 Wed | Sunny |
21.8 ° C | 38.6 ° C | 28.5 ° C | % 67 | 11.5 km/h | 17% |
| 15 October 2026 Thu | Overcast |
23 ° C | 39.9 ° C | 29.3 ° C | % 63 | 8.6 km/h | 43% |
| 16 October 2026 Fri | Overcast |
21.6 ° C | 39.3 ° C | 27.3 ° C | % 72 | 7.9 km/h | 58% |
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