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French Guiana, French Guiana · Equatorial tropical

French Guiana in August: go or not?

Mixed period. French Guiana in August: 4.9/10.

📅 Updated August 2026 🛰️ ERA5 · 10 years 📍 4.94°N · 52.33°W
⚡ This month's verdict
Why not
French Guiana · August
4.9
24–30°
Temperature
65%
Rain
7h
Sun
🌴 Tropical☀️ High UV🌧️ Monsoon season
Photo : Flow Flo via Unsplash
The month in detail

What to expect in August

August falls in the wet season in French Guiana. Showers are often brief but intense. With 65.0% of rainy days, always have indoor alternatives planned.

August ranks 3 out of 12 months in French Guiana. Compared to July: +2°F daytime, 26 pts fewer rainy days, +1.2h of sun per day.

This month's conditions

What it's like in August

UV index
9 · very high
protection essential
Feels like
very humid
24°
Sea
31°C
warm, ideal
Daylight
12.2h of daylight
Air quality
excellent
AQI 17
Compare

Is August the right month?

The best month in French Guiana is September (5.3/10), 0.4 pt higher than August.

See September →See all 12 months →
Context

Our verdict

French Guiana, French overseas department-region in South America between Brazil and Suriname : 300,000 inhabitants on 32,400 sq miles (the largest French department in surface area + 1 of the smallest populations).

Read Gilles' full review →

Book

Plan your trip

Hotels at their lowest outside peak season, highest on comfortable months. Shoulder seasons offer a good price/climate compromise.

🏨
Stay
Hotels & rentals · French Guiana
Expedia →
🎟️
Activities
Tours, tickets, experiences
See ↓
✈️
Flights
Multi-airline comparator
Kiwi →

🎟️ Activities & tours · French Guiana

GetYourGuide selection · free cancellation

See all →
Affiliate link · GetYourGuide
Practical info

What you need to know before you go

Three angles: the country (language, currency, safety, budget), the year-round climate, and the specifics of a tropical stay.

Country · French Guiana

🗣️LanguageFrench
💶CurrencyEuro (€)
🚗DrivingRight-hand
🛡️Safety ⓘVery safe · 1/5
💰Cost of living ⓘExpensive · 4/5

🌡️ Climate

🌍Climate typeEquatorial tropical
📈Climate trend ⓘStable
🔥Hottest monthAugust · 86°F
❄️Coolest monthJanuary · 82°F
🌧️Rainiest month ⓘMay · 99%

🏝️ Tropical stay

🌞Dry season ⓘMay → Sep
🌧️Wet season ⓘDec → Mar
🌀Cyclones ⓘNone (equator)
🛂VisaSchengen · 90 days
Explore

Other destinations in August

If August doesn't convince you for this destination, compare with others.

Similar climate
ParamariboSurinameGeorgetownGuyanaGalápagosEcuadorMoroniComorosColombiaColombia
Nearby
BelémBrazil829 kmTrinidad and TobagoTrinidad and Tobago1193 kmBarbadosBarbados1211 kmManausBrazil1238 km
Other top picks
Cape VerdeCape Verde5.3Marsa AlamEgypt5.3Sharm el-SheikhEgypt5.3HurghadaEgypt5.4La PalmaSpain6.2
← JulySeptember →
🗺️ See all 754 destinations on the map
Location

Where is French Guiana ?

Global position + regional geographic context.

🌍 World
🔍 Geographic context
French Guiana
Equatorial tropical climate with a 5.3 → 4.3 gap between best and worst month. 10 years of ERA5 data to choose by project.
4.94°N · 52.33°W
Questions

Frequently asked questions

What is the best time to visit French Guiana?
September is the best month with 86°F highs, 77°F lows, 7.5h of sunshine and 46.0% rainy days.
How many hours of sunshine does French Guiana get in September?
French Guiana averages 7.5 sunshine hours per day in September. It is the sunniest month with a climate score of 5.0/10.
What is the rainiest month in French Guiana?
May is the most unfavourable month with May has the lowest climate score of the year and the lowest climate score of the year.
What are the temperatures at night in French Guiana in September?
In September, overnight lows reach 77°F, while afternoon highs average 86°F.
Is French Guiana good in winter?
In winter (December-February), French Guiana scores 4.3/10 on average — Difficult period — prefer the peak season.. The best month overall remains September with a score of 5.0/10.
When should you avoid French Guiana?
May is the most difficult month to visit French Guiana, with May has the lowest climate score of the year. Climate conditions are at their lowest of the year during this period.
Can you swim in French Guiana in August?
In August, the sea averages 87°F in French Guiana: warm, ideal. Ideal conditions for swimming and snorkeling.
Do you need sun protection in French Guiana in August?
The average UV index reaches 9 in August in French Guiana (very high), with about 12.2h of daylight. Protection essential.