Cayenne Weather in August

Cayenne in August averages 32°C (90°F) during the day and 23°C (73°F) at night. Keep in mind that quite a bit of rainfall is expected this month.

Rainfall in Cayenne in August

Historically, August sees about 9 days of rain, with a monthly average of 130 mm (5.1 in). Individual showers can be quite heavy this month. A proper umbrella or rain jacket is worth having.

Temperature in Cayenne in August

Expect highs of 32°C (90°F) in Cayenne in August, with nights dropping to around 23°C (73°F). The hottest part of the day is usually in the afternoon, so lighter clothing can help you stay comfortable. Nights stay warm at around 23°C (73°F), so light bedding and good ventilation are worth thinking about.

Sunshine in Cayenne in August

The days are predominantly sunny, with an estimated total of around 235 hours of sunshine. These sun-filled days are perfect for playing sports, visiting parks, or going for a bike ride.

Wind Speed in Cayenne in August

Average wind speeds reach 3 m/s (6 knots) in August, creating light breezes that feel pleasant throughout the day. Some days are calmer, while others bring slightly more active breezes.

Average water temperature in August

With water at 28°C (82°F), you can expect warm, pleasant conditions for any water activity. There's no adjustment period — it feels comfortable straight away.

For Cayenne itself, September generally stands out with the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.

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Check the conditions for any month of the year.

• January
• February
• March
• April

• May
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• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit French Guiana, check out our Cayenne's climate page.

Cayenne Temperature in August

Min Temperature 23°C (73°F)  

Max Temperature 32°C (90°F)  

Water Temperature 28°C (82°F)  

Chance of Rain 31%  

Precipitation 130 mm (5.1 in)  

Rainy days 9 days  

Humidity 74%  

Windspeed 3 m/s (6 knots)  

Sunshine 235 hours  

Percentage Sunshine  

Daily Historical Temperatures

49-year average (1976-2025)

Based on our historical records, temperatures in Cayenne typically stay consistent throughout August, with daily highs averaging around 32°C (90°F). Nights are warm, with lows around 23°C (73°F).

Average temperatures in August

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Daily Historical Precipitation

49-year average (1976-2025)

Average daily rainfall for each day of the month based on long-term records.

Average precipitation in August

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‹ January February March April May June July August September October November December ›

Historical weather for Cayenne in August

Browse day-by-day weather records for Cayenne spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.

Historical weather Temperatures Precipitation

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‹ January February March April May June July August September October November December ›

Cayenne historical weather extremes in August

Our historical data for Cayenne spans 1992 to 2025, revealing these weather extremes.

• On August 31, 2024, temperatures climbed to 35°C (95°F), marking the warmest August day on record.
• The lowest daytime temperature in August was 24°C (75°F), recorded on August 12, 1999.
• Nighttime temperatures dropped to 21°C (70°F) on August 3, 1997, marking the coldest August night on record.
• The wettest August day on record brought 83 mm (3.3 in) of precipitation to Cayenne (August 20, 2014).

What to Wear in Cayenne in August

Warm but pleasant conditions in Cayenne in August. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. Expect heavy rainfall, so bring good rain protection and waterproof bags. Expect water temperatures of around 28°C (82°F), which is ideal for taking a refreshing dip. Bring swimwear and consider packing a towel for drying off. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.

What To Do in Cayenne in August

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

9/10

Cycling

7/10

Walking

7/10

Camping

6/10

Outdoor sports

7/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit French Guiana, check out our Cayenne's climate page.

More climate data for Cayenne

Temperature Rainfall Sunshine Humidity Wind Speed Water Temp

See the full Cayenne climate overview or explore weather in French Guiana.