Warm water. Now in the Java Sea +30°. Swimming season — from January to December.
Water temperature map of the Java Sea
ColderWarmer
Water temperature in the Java Sea by city today 📍
+30°
Singapore
+30°
Jakarta
+31°
Seremban
+30°
Tandzhung-Pinang
+31°
Bandar-Pengaram
+30°
Singapur / Paya-Lebar
+31°
Melaka
+31°
Pontianak
+29°
Banjarmasin
+29°
Serang
+30°
Dzhakarta / Sukarno-Khatta
+29°
Tegal
| City | Now | Swimming |
|---|---|---|
| Singapore | +30° | Warm water |
| Jakarta | +30° | Warm water |
| Seremban | +31° | Warm water |
| Tandzhung-Pinang | +30° | Warm water |
| Bandar-Pengaram | +31° | Warm water |
| Singapur / Paya-Lebar | +30° | Warm water |
| Melaka | +31° | Warm water |
| Pontianak | +31° | Warm water |
| Banjarmasin | +29° | Warm water |
| Serang | +29° | Warm water |
| Dzhakarta / Sukarno-Khatta | +30° | Warm water |
| Tegal | +29° | Warm water |
| Semarang | +30° | Warm water |
| Malakka / Batu Berendam | +31° | Warm water |
| Batam | +30° | Warm water |
| Silegon | +29° | Warm water |
| Pekalongan | +30° | Warm water |
| Kudus | +29° | Warm water |
| Pasuruan | +29° | Warm water |
| Salatiga | +30° | Warm water |
| Kuningan | +31° | Warm water |
| Martapura | +32° | Warm water |
| Dumai | +34° | Warm water |
| Jambi City | +33° | Warm water |
| Kuantan | +34° | Warm water |
| Kluang | +34° | Warm water |
| Johor Bahru | +34° | Warm water |
| Purvakarta | +31° | Warm water |
| Cirebon | +30° | Warm water |
| Depok | +31° | Warm water |
| Subang | +31° | Warm water |
| Modzhokerto | +32° | Warm water |
🎣 Fishing in cities on the Java Sea
Water temperature forecast in the Java Sea 📅
Wednesday
9 September
+32°
Thursday
10 September
+32°
Friday
11 September
+32°
Saturday
12 September
+31°
Sunday
13 September
+31°
Monday
14 September
+30°
Tuesday
15 September
+30°
Computed by a climate model. Water changes slowly — no sharp shifts.
Water temperature in the Java Sea this weekend
Saturday, 12 September · water +31° · warm water
Sunday, 13 September · water +31° · warm water
Water temperature in the Java Sea for a month
There is no exact monthly water forecast — it changes slowly. The reference is the climate normal: up to +32° in summer. The monthly normal is below.
Monthly water temperature in the Java Sea 🗓️
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| +30 | +32 | +32 | +30 | +30 | +32 | +31 | +28 | +30 | +32 | +30 | +30 |
Climate normal (model estimate).
Swimming conditions in the Java Sea by month
Jan+30°Swimming season — comfortable.
Feb+32°Swimming season — comfortable.
Mar+32°Swimming season — comfortable.
Apr+30°Swimming season — comfortable.
May+30°Swimming season — comfortable.
Jun+32°Swimming season — comfortable.
Jul+31°Swimming season — comfortable.
Aug+28°Swimming season — comfortable.
Sep+30°Swimming season — comfortable.
Oct+32°Swimming season — comfortable.
Nov+30°Swimming season — comfortable.
Dec+30°Swimming season — comfortable.
When to swim in the Java Sea 🏖️
🏖️
Comfortable to swim in from January to December, when the water warms to +17° and above.
Cities on the Java Sea 📍
SingaporeJakartaSerembanTandzhung-PinangBandar-PengaramSingapur / Paya-LebarMelakaPontianakBanjarmasinSerangDzhakarta / Sukarno-KhattaTegalSemarangMalakka / Batu BerendamBatamSilegonPekalonganKudusPasuruanSalatigaKuninganMartapuraDumaiJambi CityKuantanKluangJohor BahruPurvakartaCirebonDepokSubangModzhokerto
FAQ about water in the Java Sea ❓
What is the water temperature in the Java Sea now?
Now +30° — Warm water.
Can you swim in the Java Sea?
Comfortable season — from January to December.
When is water warmest in the Java Sea?
Warmest in March — up to +32°.
Where does the water temperature data come from?
A water temperature model (by latitude, longitude and day of year) and SST measurements, by cities.
Water temperature archive in the Java Sea on this day
| City | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
|---|---|---|---|---|---|---|---|---|---|---|
| Singapore | +30° | +33° | +35° | +34° | +32° | +30° | +30° | +32° | +34° | +35° |
| Jakarta | +27° | +29° | +31° | +31° | +29° | +27° | +26° | +29° | +31° | +31° |
| Seremban | +30° | +32° | +34° | +33° | +32° | +29° | +29° | +32° | +34° | +34° |
| Tandzhung-Pinang | +30° | +33° | +35° | +34° | +32° | +30° | +30° | +32° | +34° | +35° |
| Bandar-Pengaram | +30° | +33° | +35° | +34° | +32° | +30° | +30° | +32° | +34° | +35° |
Climate normal (model estimate for this date), not a measurement archive.
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Water temperature in the Java Sea — in detail
Water temperature in the Java Sea is tracked across 32 cities. The water is now about +30°. The page has a temperature map by city, a daily forecast and a monthly climate normal.