French Guiana weather live forecast

Today's maximum temperature in French Guiana is expected to be 27°C. Select a day from the live weather forecast for French Guiana (Cayenne) for more weather parameters.

Thursday
28th Aug
27

26

5

8
Friday
29th Aug
28

25

4

8
Saturday
30th Aug
30

25

6

11
Sunday
31st Aug
30

26

6

11
Monday
1st Sep
30

26

6

11

5-day weather forecast updated at 04:00 on Thursday 28th August 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 Thursday 28th August 2025

Expect isolated thunderstorms in French Guiana with a maximum temperature of 27°C, low levels of heat & humidity, maximum UV of 8 (Very High) and 5 hours of bright sunshine. There are 0-2 mm of rainfall expected with 58% chance of some rain and little or no wind of 6 kph from the north-east.

27
°C maximum temperature
26
°C minimum temperature
isolated thunderstorms
5
hours of sunshine
8
UV index (Very High)
58
% chance of some rain
<2
mm of rainfall expected
L
low heat & humidity
6
kph wind from NE

French Guiana weather for Friday 29th August 2025

Expect isolated thunderstorms in French Guiana with a maximum temperature of 28°C, moderate levels of heat & humidity, maximum UV of 8 (Very High) and 4 hours of bright sunshine. There are 0-2 mm of rainfall expected with 55% chance of some rain and a light breeze of 7 kph from the east.

28
°C maximum temperature
25
°C minimum temperature
isolated thunderstorms
4
hours of sunshine
8
UV index (Very High)
55
% chance of some rain
<2
mm of rainfall expected
M
moderate heat & humidity
7
kph wind from E

French Guiana weather for Saturday 30th August 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 64% chance of some rain and a light breeze of 12 kph from the east.

30
°C maximum temperature
25
°C minimum temperature
isolated thunderstorms
6
hours of sunshine
11
UV index (Extreme)
64
% chance of some rain
<2
mm of rainfall expected
M
moderate heat & humidity
12
kph wind from E

French Guiana weather for Sunday 31st August 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 59% chance of some rain and a gentle breeze of 13 kph from the east.

30
°C maximum temperature
26
°C minimum temperature
isolated thunderstorms
6
hours of sunshine
11
UV index (Extreme)
59
% chance of some rain
<2
mm of rainfall expected
M
moderate heat & humidity
13
kph wind from E

French Guiana weather for Monday 1st September 2025

Expect broken clouds 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 mm of rainfall expected and a gentle breeze of 13 kph from the east.