French Guiana weather live forecast

Today's maximum temperature in French Guiana is expected to be 28°C. Select a day from the live weather forecast for French Guiana (Cayenne) for more weather parameters.

Wednesday
20th May
28

25

3

UV9
Thursday
21st May
29

25

6

UV11
Friday
22nd May
29

26

3

UV8
Saturday
23rd May
28

26

1

UV6
Sunday
24th May
28

25

1

UV11

5-day weather forecast updated at 04:00 on Wednesday 20th May 2026 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 20th May 2026

Expect isolated thunderstorms in French Guiana with a maximum temperature of 28°C, moderate levels of heat & humidity, maximum UV of 9 (Very High) and 3 hours of bright sunshine. There are 20-30 mm of rainfall expected with 73% chance of some rain and a light breeze of 9 kph from the east.

28
°C maximum temperature
25
°C minimum temperature
isolated thunderstorms
3
hours of sunshine
UV9
UV index (Very High)
73
% chance of some rain
<30
mm of rainfall expected
M
moderate heat & humidity
9
kph wind from E

French Guiana weather for Thursday 21st May 2026

Expect isolated thunderstorms in French Guiana with a maximum temperature of 29°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 66% chance of some rain and a light breeze of 12 kph from the east.

29
°C maximum temperature
25
°C minimum temperature
isolated thunderstorms
6
hours of sunshine
UV11
UV index (Extreme)
66
% chance of some rain
<20
mm of rainfall expected
M
moderate heat & humidity
12
kph wind from E

French Guiana weather for Friday 22nd May 2026

Expect isolated thunderstorms in French Guiana with a maximum temperature of 29°C, moderate levels of heat & humidity, maximum UV of 8 (Very High) and 3 hours of bright sunshine. There are 20-30 mm of rainfall expected with 83% chance of some rain and a light breeze of 11 kph from the east.

29
°C maximum temperature
26
°C minimum temperature
isolated thunderstorms
3
hours of sunshine
UV8
UV index (Very High)
83
% chance of some rain
<30
mm of rainfall expected
M
moderate heat & humidity
11
kph wind from E

French Guiana weather for Saturday 23rd May 2026

Expect isolated thunderstorms in French Guiana with a maximum temperature of 28°C, low levels of heat & humidity, maximum UV of 6 (High) and 1 hour of bright sunshine. There are 20-30 mm of rainfall expected with 83% chance of some rain and a light breeze of 9 kph from the east.

28
°C maximum temperature
26
°C minimum temperature
isolated thunderstorms
1
hour of sunshine
UV6
UV index (High)
83
% chance of some rain
<30
mm of rainfall expected
L
low heat & humidity
9
kph wind from E

French Guiana weather for Sunday 24th May 2026

Expect isolated thunderstorms in French Guiana with a maximum temperature of 28°C, moderate levels of heat & humidity, maximum UV of 11 (Extreme) and 1 hour of bright sunshine. There are 20-30 mm of rainfall expected with 85% chance of some rain and a light breeze of 11 kph from the east.