Guyane weather
Today's sky, the hour-by-hour rain chance and the 16-day forecast for Guyane, French Guiana. Like most weather services, we show Guyane at one spot: Cayenne, its largest city. At 7:30 PM local time it was cloudy and 28°C (82°F). Light rain for 5 of the next 24 hours (under 1 mm/h, 1.7 mm total) — cloudy, but fine to be out. Best months for weather: Aug–Nov.
Current conditions
- Clouds
- 100%
- Chance of rain
- 3%
- Rain
- 0.0 mm/h
Hourly Forecast
Light rain for 5 of the next 24 hours (under 1 mm/h, 1.7 mm total) — cloudy, but fine to be out
Daily Forecast
Best Time to Visit
Peak season Aug–NovOff season Dec–Jun
About Cayenne weather
Is it raining in Cayenne right now?
No. It’s cloudy and 28° right now. Light rain for 5 of the next 24 hours (under 1 mm/h, 1.7 mm total) — cloudy, but fine to be out.
What’s the weather like in Cayenne this week?
Over the next 7 days, expect highs of 32–33° and lows of 23–27°. Rain is likely on 4 of 7 days (Sunday, Tuesday, Thursday, Friday). The driest day looks like Saturday.
Has it been raining in Cayenne lately?
In the past 7 days, Cayenne had 2 rainy days and 5.4 mm of rain in total.
What should I pack for Cayenne?
For the coming week, bring an umbrella or rain jacket, light, breathable clothes and sunscreen.
Guyane weather by month
When is the best time to visit Guyane?
Based on weather alone, the best time to visit Guyane is Aug–Nov, according to NASA's 2001–2025 climate averages. Dec–Jun tends to be the least pleasant. Average highs run from 27°C (81°F) in February to 30°C (85°F) in October.
What is the rainiest month in Guyane?
May is the wettest month, with about 504 mm (19.8 in) of rain on average. September is the driest, with about 54 mm (2.1 in).
What is the hottest month in Guyane?
October is the warmest, with average highs of 30°C (85°F) and lows of 25°C (77°F). February is the coolest, with highs of 27°C (81°F) and lows of 24°C (75°F).
Does Guyane have a rainy season?
Yes. Dec–Jul is the rainy season (150 mm or more a month), while Sep–Oct is usually dry (under 60 mm).
How warm is the sea in Guyane?
The sea is warmest in September at about 30°C (86°F) and coolest in February at about 28°C (83°F). It is warm enough for swimming all year.
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis for Cayenne), sea temperature from Open-Meteo Marine, forecast and current conditions from Open-Meteo. Page updated . How we rate months
Compare places in Guyane
Weather can differ a lot within Guyane: coasts, hills and mountains each have their own climate.
| Place | Best months | Rainy months | Highs | Rain a year |
|---|---|---|---|---|
| Cayenne | Aug–Nov | Dec–Jul | 27–30°C | 2,872 mm |
| Matoury | Aug–Nov | Dec–Jul | 27–30°C | 2,872 mm |
| Saint-Laurent-du-Maroni | Aug–Nov | Dec–Jul | 28–32°C | 2,259 mm |
| Kourou | Aug–Nov | Dec–Jul | 27–30°C | 2,872 mm |
| Rémire-Montjoly | Aug–Nov | Dec–Jul | 27–30°C | 2,872 mm |