Swimming in Puerto Rico in september 2025 Sea temperature by city in september

Do you want to go to the beach in Puerto Rico 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 Puerto Rico by city and our opinion on the chances of enjoying pleasant sea conditions.

Sea temperature in Puerto Rico in september 2025

Here, find the average sea temperature in Puerto Rico in september in several coastal cities.

San Juan

on average:

85°F

min: 84°F / max: 87°F

Mayagüez‎

on average:

85°F

min: 84°F / max: 87°F

Arecibo

on average:

85°F

min: 84°F / max: 87°F

Bayamón

on average:

85°F

min: 84°F / max: 87°F

Culebra

on average:

85°F

min: 83°F / max: 87°F

Isla De Mona

on average:

86°F

min: 84°F / max: 87°F

Ponce

on average:

86°F

min: 84°F / max: 87°F

Vieques

on average:

85°F

min: 83°F / max: 87°F

Adjuntas

on average:

86°F

min: 84°F / max: 87°F

Aguadilla

on average:

86°F

min: 84°F / max: 87°F

Arroyo

on average:

86°F

min: 84°F / max: 88°F

Boqueron

on average:

85°F

min: 84°F / max: 87°F

Cayey

on average:

86°F

min: 84°F / max: 87°F

Ceiba

on average:

85°F

min: 84°F / max: 87°F

Dorado

on average:

85°F

min: 84°F / max: 87°F

Fajardo

on average:

85°F

min: 84°F / max: 87°F

Florida

on average:

85°F

min: 84°F / max: 87°F

Guanica

on average:

86°F

min: 84°F / max: 87°F

Hatillo

on average:

85°F

min: 84°F / max: 87°F

Hormigueros

on average:

86°F

min: 84°F / max: 87°F

Humacao

on average:

85°F

min: 84°F / max: 87°F

Isabela

on average:

85°F

min: 84°F / max: 86°F

Luquillo

on average:

85°F

min: 84°F / max: 87°F

Maunabo

on average:

86°F

min: 84°F / max: 87°F

Punta Santiago

on average:

86°F

min: 84°F / max: 87°F

Quebradillas

on average:

85°F

min: 84°F / max: 87°F

Rincon

on average:

86°F

min: 84°F / max: 87°F

Salinas

on average:

86°F

min: 84°F / max: 88°F

San German

on average:

85°F

min: 84°F / max: 87°F

San Sebastian

on average:

85°F

min: 84°F / max: 87°F

Santa Isabel

on average:

86°F

min: 84°F / max: 87°F

Yauco

on average:

86°F

min: 84°F / max: 88°F

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Sea temperature in august in Puerto Rico

Sea temperature in october in Puerto Rico

Where should you go swimming in Puerto Rico in the month of september?

Swimming in Puerto Rico in september is ideal

In september in Puerto Rico swimming conditions are generally the same everywhere.

In september in San Juan, Mayagüez‎, Arecibo, Bayamón, Culebra, Isla De Mona, Ponce, Vieques, Adjuntas, Aguadilla, Arroyo, Boqueron, Cayey, Ceiba, Dorado, Fajardo, Florida, Guanica, Hatillo, Hormigueros, Humacao, Isabela, Luquillo, Maunabo, Punta Santiago, Quebradillas, Rincon, Salinas, San German, San Sebastian, Santa Isabel and Yauco, 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 Puerto Rico in september: the map of sea temperatures

ideal swimming

pleasant swimming

cool swimming

cold swimming

freezing swimming

Water temperature and seasonal norms in september

San Juan

	August	September	October
Average sea temperature	85°F	85°F	85°F
Minimum sea temperature	83°F	84°F	83°F
Maximum sea temperature	86°F	87°F	87°F
Average outside temperature	85°F	85°F	85°F
Maximum outside temperature	86°F	86°F	86°F
Minimum outside temperature	83°F	83°F	83°F
Precipitation	3.6in	4in	3.9in
Number of days of precipitation	4 jour(s) (13%)	5 jour(s) (17%)	6 jour(s) (19%)
Cloud cover	32%	29%	28%
Our opinion	ideal swimming	ideal swimming	ideal swimming

More information on swimming in San Juan in september

Mayagüez‎

	August	September	October
Average sea temperature	85°F	85°F	85°F
Minimum sea temperature	83°F	84°F	83°F
Maximum sea temperature	86°F	87°F	87°F
Average outside temperature	85°F	85°F	85°F
Maximum outside temperature	86°F	88°F	86°F
Minimum outside temperature	83°F	83°F	83°F
Precipitation	9.7in	10.2in	8.2in
Number of days of precipitation	16 jour(s) (53%)	15 jour(s) (49%)	14 jour(s) (46%)
Cloud cover	23%	23%	23%
Our opinion	ideal swimming	ideal swimming	ideal swimming

More information on swimming in Mayagüez‎ in september

Arecibo

	August	September	October
Average sea temperature	85°F	85°F	85°F
Minimum sea temperature	84°F	84°F	84°F
Maximum sea temperature	86°F	87°F	87°F
Average outside temperature	85°F	85°F	85°F
Maximum outside temperature	86°F	86°F	86°F
Minimum outside temperature	81°F	81°F	81°F
Precipitation	7.1in	9.1in	7.4in
Number of days of precipitation	10 jour(s) (33%)	12 jour(s) (40%)	12 jour(s) (38%)
Cloud cover	26%	26%	24%
Our opinion	ideal swimming	ideal swimming	ideal swimming

Bayamón

	August	September	October
Average sea temperature	85°F	85°F	85°F
Minimum sea temperature	83°F	84°F	83°F
Maximum sea temperature	86°F	87°F	86°F
Average outside temperature	85°F	85°F	85°F
Maximum outside temperature	86°F	88°F	86°F
Minimum outside temperature	83°F	83°F	83°F
Precipitation	4.4in	4.8in	4.7in
Number of days of precipitation	5 jour(s) (16%)	5 jour(s) (18%)	7 jour(s) (22%)
Cloud cover	33%	30%	30%
Our opinion	ideal swimming	ideal swimming	ideal swimming

Culebra

	August	September	October
Average sea temperature	85°F	85°F	85°F
Minimum sea temperature	83°F	83°F	83°F
Maximum sea temperature	87°F	87°F	86°F
Average outside temperature	85°F	85°F	85°F
Maximum outside temperature	85°F	86°F	86°F
Minimum outside temperature	83°F	83°F	83°F
Precipitation	9.4in	10.2in	8.8in
Number of days of precipitation	11 jour(s) (36%)	12 jour(s) (40%)	14 jour(s) (45%)
Cloud cover	40%	39%	37%
Our opinion	ideal swimming	ideal swimming	ideal swimming

List of coastal cities in Puerto Rico

San Juan in september	ideal swimming
Mayagüez‎ in september	ideal swimming
Arecibo in september	ideal swimming
Bayamón in september	ideal swimming
Culebra in september	ideal swimming
Isla De Mona in september	ideal swimming
Ponce in september	ideal swimming
Vieques in september	ideal swimming
Adjuntas in september	ideal swimming
Aguadilla in september	ideal swimming
Arroyo in september	ideal swimming
Boqueron in september	ideal swimming
Cayey in september	ideal swimming
Ceiba in september	ideal swimming
Dorado in september	ideal swimming
Fajardo in september	ideal swimming
Florida in september	ideal swimming
Guanica in september	ideal swimming
Hatillo in september	ideal swimming
Hormigueros in september	ideal swimming
Humacao in september	ideal swimming
Isabela in september	ideal swimming
Luquillo in september	ideal swimming
Maunabo in september	ideal swimming
Punta Santiago in september	ideal swimming
Quebradillas in september	ideal swimming
Rincon in september	ideal swimming
Salinas in september	ideal swimming
San German in september	ideal swimming
San Sebastian in september	ideal swimming
Santa Isabel in september	ideal swimming
Yauco in september	ideal swimming