Swimming in French Guyana in september 2025 Sea temperature by city in september
Do you want to go to the beach in French Guyana in september 2025? Is it the right month to go for pleasant temperatures and staying in the water for a long time? The answer is on this page with the sea temperatures in september in French Guyana by city and our opinion on the chances of enjoying pleasant sea conditions.
Sea temperature in French Guyana in september 2025
Here, find the average sea temperature in French Guyana in september in several coastal cities.
84°F
min: 81°F / max: 86°F
83°F
min: 81°F / max: 86°F
83°F
min: 81°F / max: 86°F
Awala-Yalimapo
83°F
min: 81°F / max: 86°F
Îles du Salut
84°F
min: 81°F / max: 86°F
Iracoubo
83°F
min: 81°F / max: 86°F
Macouria
84°F
min: 81°F / max: 86°F
83°F
min: 81°F / max: 86°F
Saint-Laurent-du-Maroni
83°F
min: 81°F / max: 86°F
Sinnamary
83°F
min: 81°F / max: 86°F
Where should you go swimming in French Guyana in the month of september?
Swimming in French Guyana in september is ideal
In september in French Guyana swimming conditions are generally the same everywhere.
In september in Cayenne, Kourou, Mana, Awala-Yalimapo, Îles du Salut, Iracoubo, Macouria, Rémire-Montjoly, Saint-Laurent-du-Maroni and Sinnamary, swimming conditions are perfect! With water reaching a maximum of 86°F and an average of 84°F, going in the water (and staying there!) feels great.
Where to go swimming in French Guyana in september: the map of sea temperatures
ideal swimming 
pleasant swimming 
cool swimming 
cold swimming 
freezing swimmingWater temperature and seasonal norms in september
Cayenne
| September | |||
| Average sea temperature | 84°F | ||
| Minimum sea temperature | 81°F | ||
| Maximum sea temperature | 86°F | ||
| Average outside temperature | 85°F | ||
| Maximum outside temperature | 90°F | ||
| Minimum outside temperature | 77°F | ||
| Precipitation | 2.4in | ||
| Number of days of precipitation | 4 jour(s) (13%) | ||
| Cloud cover | 27% | ||
| Our opinion | ideal swimming |
More information on swimming in Cayenne in september
Kourou
| September | |||
| Average sea temperature | 83°F | ||
| Minimum sea temperature | 81°F | ||
| Maximum sea temperature | 86°F | ||
| Average outside temperature | 83°F | ||
| Maximum outside temperature | 88°F | ||
| Minimum outside temperature | 77°F | ||
| Precipitation | 3.1in | ||
| Number of days of precipitation | 5 jour(s) (18%) | ||
| Cloud cover | 27% | ||
| Our opinion | ideal swimming |
More information on swimming in Kourou in september
Mana
| September | |||
| Average sea temperature | 83°F | ||
| Minimum sea temperature | 81°F | ||
| Maximum sea temperature | 86°F | ||
| Average outside temperature | 83°F | ||
| Maximum outside temperature | 94°F | ||
| Minimum outside temperature | 74°F | ||
| Precipitation | 2.8in | ||
| Number of days of precipitation | 5 jour(s) (15%) | ||
| Cloud cover | 36% | ||
| Our opinion | ideal swimming |
More information on swimming in Mana in september
Awala-Yalimapo
| September | |||
| Average sea temperature | 83°F | ||
| Minimum sea temperature | 81°F | ||
| Maximum sea temperature | 86°F | ||
| Average outside temperature | 83°F | ||
| Maximum outside temperature | 94°F | ||
| Minimum outside temperature | 74°F | ||
| Precipitation | 2.8in | ||
| Number of days of precipitation | 5 jour(s) (15%) | ||
| Cloud cover | 36% | ||
| Our opinion | ideal swimming |
Îles du Salut
| September | |||
| Average sea temperature | 84°F | ||
| Minimum sea temperature | 81°F | ||
| Maximum sea temperature | 86°F | ||
| Average outside temperature | 83°F | ||
| Maximum outside temperature | 88°F | ||
| Minimum outside temperature | 77°F | ||
| Precipitation | 3.1in | ||
| Number of days of precipitation | 5 jour(s) (18%) | ||
| Cloud cover | 27% | ||
| Our opinion | ideal swimming |
List of coastal cities in French Guyana
| Cayenne in september | ideal swimming |
| Kourou in september | ideal swimming |
| Mana in september | ideal swimming |
| Awala-Yalimapo in september | ideal swimming |
| Îles du Salut in september | ideal swimming |
| Iracoubo in september | ideal swimming |
| Macouria in september | ideal swimming |
| Rémire-Montjoly in september | ideal swimming |
| Saint-Laurent-du-Maroni in september | ideal swimming |
| Sinnamary in september | ideal swimming |