French Guiana weather live forecast

Today's maximum temperature in French Guiana is expected to be 81°F. Select a day from the live weather forecast for French Guiana (Cayenne) for more weather parameters.

Thursday
28th Aug
81

79

5

8
Friday
29th Aug
82

77

4

8
Saturday
30th Aug
86

77

6

11
Sunday
31st Aug
86

79

6

11
Monday
1st Sep
86

79

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 81°F, 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 4 mph from the north-east.

81
°F maximum temperature
79
°F 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
4
mph wind from NE

French Guiana weather for Friday 29th August 2025

Expect isolated thunderstorms in French Guiana with a maximum temperature of 82°F, 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 4 mph from the east.

82
°F maximum temperature
77
°F 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
4
mph wind from E

French Guiana weather for Saturday 30th August 2025

Expect isolated thunderstorms in French Guiana with a maximum temperature of 86°F, 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 7 mph from the east.

86
°F maximum temperature
77
°F 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
7
mph wind from E

French Guiana weather for Sunday 31st August 2025

Expect isolated thunderstorms in French Guiana with a maximum temperature of 86°F, 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 8 mph from the east.

86
°F maximum temperature
79
°F 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
8
mph wind from E

French Guiana weather for Monday 1st September 2025

Expect broken clouds in French Guiana with a maximum temperature of 86°F, 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 8 mph from the east.