French Guiana weather live forecast

Today's maximum temperature in French Guiana is expected to be 30°C. Select a day from the live weather forecast for French Guiana (Cayenne) for more weather parameters.

Wednesday
3rd Sep
30

27

6

11
Thursday
4th Sep
30

27

6

11
Friday
5th Sep
30

26

5

7
Saturday
6th Sep
31

27

2

10
Sunday
7th Sep
31

26

8

11

5-day weather forecast updated at 04:00 on Wednesday 3rd September 2025 GMT

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The 5-day weather forecast for French Guiana, represented by Cayenne, (Cayenne) is provided by the Swiss meteorological agency, meteoblue. Find out more about our data sources.

French Guiana weather forecast by day

Below are the detailed weather forecasts for French Guiana for the next 5 days. The forecasts shown are for Cayenne and may not represent the whole of French Guiana. Browse more destinations in French Guiana to view more weather forecasts.

French Guiana weather for Wednesday 3rd September 2025

Expect isolated thunderstorms in French Guiana with a maximum temperature of 30°C, moderate levels of heat & humidity, maximum UV of 11 (Extreme) and 6 hours of bright sunshine. There are 0-2 mm of rainfall expected with 44% chance of some rain and a light breeze of 12 kph from the east.

30
°C maximum temperature
27
°C minimum temperature
isolated thunderstorms
6
hours of sunshine
11
UV index (Extreme)
44
% chance of some rain
<2
mm of rainfall expected
M
moderate heat & humidity
12
kph wind from E

French Guiana weather for Thursday 4th September 2025

Expect isolated thunderstorms in French Guiana with a maximum temperature of 30°C, moderate levels of heat & humidity, maximum UV of 11 (Extreme) and 6 hours of bright sunshine. There are 10-20 mm of rainfall expected with 34% chance of some rain and a gentle breeze of 13 kph from the east.

30
°C maximum temperature
27
°C minimum temperature
isolated thunderstorms
6
hours of sunshine
11
UV index (Extreme)
34
% chance of some rain
<20
mm of rainfall expected
M
moderate heat & humidity
13
kph wind from E

French Guiana weather for Friday 5th September 2025

Expect isolated thunderstorms in French Guiana with a maximum temperature of 30°C, moderate levels of heat & humidity, maximum UV of 7 (High) and 5 hours of bright sunshine. There are 0-2 mm of rainfall expected with 33% chance of some rain and a gentle breeze of 13 kph from the east.

30
°C maximum temperature
26
°C minimum temperature
isolated thunderstorms
5
hours of sunshine
7
UV index (High)
33
% chance of some rain
<2
mm of rainfall expected
M
moderate heat & humidity
13
kph wind from E

French Guiana weather for Saturday 6th September 2025

Expect isolated thunderstorms in French Guiana with a maximum temperature of 31°C, moderate levels of heat & humidity, maximum UV of 10 (Very High) and 2 hours of bright sunshine. There are 0-2 mm of rainfall expected with 41% chance of some rain and a gentle breeze of 13 kph from the east.

31
°C maximum temperature
27
°C minimum temperature
isolated thunderstorms
2
hours of sunshine
10
UV index (Very High)
41
% chance of some rain
<2
mm of rainfall expected
M
moderate heat & humidity
13
kph wind from E

French Guiana weather for Sunday 7th September 2025

Expect broken clouds in French Guiana with a maximum temperature of 31°C, moderate levels of heat & humidity, maximum UV of 11+ (Extreme) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 14 kph from the east.