Swimming on the island of Java in september 2025 Sea temperature by city in september
Do you want to go to the beach on the island of Java 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 on the island of Java by city and our opinion on the chances of enjoying pleasant sea conditions.
Sea temperature on the island of Java in september 2025
Here, find the average sea temperature on the island of Java in september in several coastal cities.
West Java in september
84°F
min: 83°F / max: 86°F
Babadan
80°F
min: 76°F / max: 83°F
Pasar Sirih Beach
83°F
min: 80°F / max: 87°F
Sindangbarang
79°F
min: 77°F / max: 83°F
Sindangkerta Beach
79°F
min: 76°F / max: 82°F
Tanjung Pasir Beach
84°F
min: 83°F / max: 86°F
East Java in september
83°F
min: 81°F / max: 86°F
Sendangbiru
79°F
min: 76°F / max: 83°F
Sukamade beach
79°F
min: 76°F / max: 83°F
Bangkalan
83°F
min: 81°F / max: 85°F
Banyuwangi
80°F
min: 77°F / max: 83°F
Pacitan
79°F
min: 75°F / max: 83°F
Central Java in september
84°F
min: 81°F / max: 86°F
Karimun Java
84°F
min: 83°F / max: 86°F
Batang
84°F
min: 83°F / max: 87°F
Cilacap
80°F
min: 77°F / max: 82°F
Pekalongan
84°F
min: 81°F / max: 86°F
Pemalang
83°F
min: 81°F / max: 86°F
Where should you go swimming on the island of Java in the month of september?
Swimming on the island of Java in september is ideal (in the best case scenario)
In september on the island of Java swimming conditions vary by city. Details below:
In september in Jakarta, Surabaya, Semarang, Babadan, Karimun Java, Pasar Sirih Beach, Sindangbarang, Sindangkerta Beach, Tanjung Pasir Beach, Ujung Kulon National Park, Bangkalan, Banyuwangi, Batang, Cilacap, Cirebon, Indramayu, Pamanukan, Pekalongan, Pemalang, Probolinggo, Sidoarjo, Situbondo, Sumenep, Tegal, Tengah and Tuban, 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.
As for Sendangbiru, Sukamade beach and Pacitan, swimming is pleasant in september. The sea water is 79°F on average (min: 76°F/max: 83°F) so you can easily spend time in the water.
Where to go swimming on the island of Java in september: the map of sea temperatures
ideal swimming 
pleasant swimming 
cool swimming 
cold swimming 
freezing swimmingWater temperature and seasonal norms in september
Jakarta
| September | |||
| Average sea temperature | 84°F | ||
| Minimum sea temperature | 83°F | ||
| Maximum sea temperature | 86°F | ||
| Average outside temperature | 86°F | ||
| Maximum outside temperature | 92°F | ||
| Minimum outside temperature | 83°F | ||
| Precipitation | 5.2in | ||
| Number of days of precipitation | 7 jour(s) (22%) | ||
| Cloud cover | 26% | ||
| Our opinion | ideal swimming |
More information on swimming in Jakarta in september
Surabaya
| September | |||
| Average sea temperature | 83°F | ||
| Minimum sea temperature | 81°F | ||
| Maximum sea temperature | 86°F | ||
| Average outside temperature | 88°F | ||
| Maximum outside temperature | 92°F | ||
| Minimum outside temperature | 83°F | ||
| Precipitation | 0.9in | ||
| Number of days of precipitation | 1 jour(s) (4%) | ||
| Cloud cover | 14% | ||
| Our opinion | ideal swimming |
More information on swimming in Surabaya in september
Semarang
| September | |||
| Average sea temperature | 84°F | ||
| Minimum sea temperature | 81°F | ||
| Maximum sea temperature | 86°F | ||
| Average outside temperature | 88°F | ||
| Maximum outside temperature | 95°F | ||
| Minimum outside temperature | 81°F | ||
| Precipitation | 2.4in | ||
| Number of days of precipitation | 4 jour(s) (12%) | ||
| Cloud cover | 25% | ||
| Our opinion | ideal swimming |
More information on swimming in Semarang in september
Babadan
| September | |||
| Average sea temperature | 80°F | ||
| Minimum sea temperature | 76°F | ||
| Maximum sea temperature | 83°F | ||
| Average outside temperature | 83°F | ||
| Maximum outside temperature | 88°F | ||
| Minimum outside temperature | 76°F | ||
| Precipitation | 8.5in | ||
| Number of days of precipitation | 11 jour(s) (37%) | ||
| Cloud cover | 38% | ||
| Our opinion | ideal swimming |
Karimun Java
| September | |||
| Average sea temperature | 84°F | ||
| Minimum sea temperature | 83°F | ||
| Maximum sea temperature | 86°F | ||
| Average outside temperature | 83°F | ||
| Maximum outside temperature | 85°F | ||
| Minimum outside temperature | 81°F | ||
| Precipitation | 2.8in | ||
| Number of days of precipitation | 4 jour(s) (14%) | ||
| Cloud cover | 22% | ||
| Our opinion | ideal swimming |
List of coastal cities on the island of Java
| Jakarta in september | ideal swimming |
| Surabaya in september | ideal swimming |
| Semarang in september | ideal swimming |
| Babadan in september | ideal swimming |
| Karimun Java in september | ideal swimming |
| Pasar Sirih Beach in september | ideal swimming |
| Sendangbiru in september | pleasant swimming |
| Sindangbarang in september | ideal swimming |
| Sindangkerta Beach in september | ideal swimming |
| Sukamade beach in september | pleasant swimming |
| Tanjung Pasir Beach in september | ideal swimming |
| Ujung Kulon National Park in september | ideal swimming |
| Bangkalan in september | ideal swimming |
| Banyuwangi in september | ideal swimming |
| Batang in september | ideal swimming |
| Cilacap in september | ideal swimming |
| Cirebon in september | ideal swimming |
| Indramayu in september | ideal swimming |
| Pacitan in september | pleasant swimming |
| Pamanukan in september | ideal swimming |
| Pekalongan in september | ideal swimming |
| Pemalang in september | ideal swimming |
| Probolinggo in september | ideal swimming |
| Sidoarjo in september | ideal swimming |
| Situbondo in september | ideal swimming |
| Sumenep in september | ideal swimming |
| Tegal in september | ideal swimming |
| Tengah in september | ideal swimming |
| Tuban in september | ideal swimming |