Swimming in Costa Rica in september 2025 Sea temperature by city in september
Do you want to go to the beach in Costa Rica 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 Costa Rica by city and our opinion on the chances of enjoying pleasant sea conditions.
Sea temperature in Costa Rica in september 2025
Here, find the average sea temperature in Costa Rica in september in several coastal cities.
Provincia Guanacaste in september
85°F
min: 83°F / max: 87°F
84°F
min: 82°F / max: 87°F
Parque Nacional Santa Rosa
85°F
min: 83°F / max: 87°F
Playa Arenillas
85°F
min: 83°F / max: 87°F
Playa Caletas
84°F
min: 83°F / max: 86°F
Playa Flamingo (Guanacaste)
84°F
min: 82°F / max: 86°F
Pacific coast in september
84°F
min: 82°F / max: 86°F
85°F
min: 83°F / max: 86°F
84°F
min: 82°F / max: 86°F
Dominical
85°F
min: 82°F / max: 86°F
Esterillos
85°F
min: 83°F / max: 86°F
Isla de Chira
85°F
min: 83°F / max: 86°F
Caribbean coast in september
85°F
min: 83°F / max: 87°F
85°F
min: 84°F / max: 87°F
85°F
min: 83°F / max: 87°F
Bananito Sur
85°F
min: 83°F / max: 87°F
Parismina
85°F
min: 83°F / max: 87°F
Parque Nacional Cahuita
85°F
min: 83°F / max: 87°F
Where should you go swimming in Costa Rica in the month of september?
Swimming in Costa Rica in september is ideal
In september in Costa Rica swimming conditions are generally the same everywhere.
In september in La Cruz, Montezuma, Puerto Limón, Puntarenas, Tamarindo, Tortuguero, Manzanillo, Puerto Jiménez, Bananito Sur, Dominical, Esterillos, Isla de Chira, Isla del caño, Jicaral, Matapalo, Ojochal, Paquera, Parismina, Parque Nacional Cahuita, Parque Nacional Corcovado, Parque Nacional Santa Rosa, Pavones, Playa Arenillas, Playa Caletas, Playa Flamingo (Guanacaste), Playa Hermosa, Playa Santa Teresa, Puerto Viejo de Talamanca, Punta Morales, Punta Uva, Quepos, Uvita, Jaco, Miramar, Parrita and Sámara, swimming conditions are perfect! With water reaching a maximum of 87°F and an average of 85°F, going in the water (and staying there!) feels great.
Where to go swimming in Costa Rica in september: the map of sea temperatures
ideal swimming 
pleasant swimming 
cool swimming 
cold swimming 
freezing swimmingWater temperature and seasonal norms in september
La Cruz
| September | |||
| Average sea temperature | 85°F | ||
| Minimum sea temperature | 83°F | ||
| Maximum sea temperature | 87°F | ||
| Average outside temperature | 83°F | ||
| Maximum outside temperature | 88°F | ||
| Minimum outside temperature | 79°F | ||
| Precipitation | 9.2in | ||
| Number of days of precipitation | 16 jour(s) (54%) | ||
| Cloud cover | 43% | ||
| Our opinion | ideal swimming |
More information on swimming in La Cruz in september
Montezuma
| September | |||
| Average sea temperature | 84°F | ||
| Minimum sea temperature | 82°F | ||
| Maximum sea temperature | 86°F | ||
| Average outside temperature | 81°F | ||
| Maximum outside temperature | 86°F | ||
| Minimum outside temperature | 77°F | ||
| Precipitation | 19.7in | ||
| Number of days of precipitation | 25 jour(s) (85%) | ||
| Cloud cover | 44% | ||
| Our opinion | ideal swimming |
More information on swimming in Montezuma in september
Puerto Limón
| September | |||
| Average sea temperature | 85°F | ||
| Minimum sea temperature | 83°F | ||
| Maximum sea temperature | 87°F | ||
| Average outside temperature | 83°F | ||
| Maximum outside temperature | 88°F | ||
| Minimum outside temperature | 79°F | ||
| Precipitation | 8.5in | ||
| Number of days of precipitation | 12 jour(s) (39%) | ||
| Cloud cover | 33% | ||
| Our opinion | ideal swimming |
More information on swimming in Puerto Limón in september
Puntarenas
| September | |||
| Average sea temperature | 85°F | ||
| Minimum sea temperature | 83°F | ||
| Maximum sea temperature | 86°F | ||
| Average outside temperature | 83°F | ||
| Maximum outside temperature | 88°F | ||
| Minimum outside temperature | 77°F | ||
| Precipitation | 20.1in | ||
| Number of days of precipitation | 25 jour(s) (85%) | ||
| Cloud cover | 44% | ||
| Our opinion | ideal swimming |
More information on swimming in Puntarenas in september
Tamarindo
| September | |||
| Average sea temperature | 84°F | ||
| Minimum sea temperature | 82°F | ||
| Maximum sea temperature | 87°F | ||
| Average outside temperature | 81°F | ||
| Maximum outside temperature | 86°F | ||
| Minimum outside temperature | 77°F | ||
| Precipitation | 10.7in | ||
| Number of days of precipitation | 18 jour(s) (59%) | ||
| Cloud cover | 41% | ||
| Our opinion | ideal swimming |
More information on swimming in Tamarindo in september
List of coastal cities in Costa Rica
| La Cruz in september | ideal swimming |
| Montezuma in september | ideal swimming |
| Puerto Limón in september | ideal swimming |
| Puntarenas in september | ideal swimming |
| Tamarindo in september | ideal swimming |
| Tortuguero in september | ideal swimming |
| Manzanillo in september | ideal swimming |
| Puerto Jiménez in september | ideal swimming |
| Bananito Sur in september | ideal swimming |
| Dominical in september | ideal swimming |
| Esterillos in september | ideal swimming |
| Isla de Chira in september | ideal swimming |
| Isla del caño in september | ideal swimming |
| Jicaral in september | ideal swimming |
| Matapalo in september | ideal swimming |
| Ojochal in september | ideal swimming |
| Paquera in september | ideal swimming |
| Parismina in september | ideal swimming |
| Parque Nacional Cahuita in september | ideal swimming |
| Parque Nacional Corcovado in september | ideal swimming |
| Parque Nacional Santa Rosa in september | ideal swimming |
| Pavones in september | ideal swimming |
| Playa Arenillas in september | ideal swimming |
| Playa Caletas in september | ideal swimming |
| Playa Flamingo (Guanacaste) in september | ideal swimming |
| Playa Hermosa in september | ideal swimming |
| Playa Santa Teresa in september | ideal swimming |
| Puerto Viejo de Talamanca in september | ideal swimming |
| Punta Morales in september | ideal swimming |
| Punta Uva in september | ideal swimming |
| Quepos in september | ideal swimming |
| Uvita in september | ideal swimming |
| Jaco in september | ideal swimming |
| Miramar in september | ideal swimming |
| Parrita in september | ideal swimming |
| Sámara in september | ideal swimming |