Jakarta, Java to Merak Mas Terminal — sea route & marine weather
The sea route from Jakarta, Java (IDJKT) to Merak Mas Terminal (IDMRK) is about 62 nm — about 6 hours at 10 kn. Along the route today (Aug 3): E wind 2–11 kn, waves 0.6–1.1 m. The baseline track is drawn on the chart; Calculate replans it for your vessel and live weather.
Passage facts| Sea-route distance | 62 nm |
|---|
| Passage time at 10 kn | about 6 hours |
|---|
| Great-circle distance | 54 nm |
|---|
| Jakarta, Java | 6°6.0′S 106°53.0′E |
|---|
| Merak Mas Terminal | 5°55.2′S 105°59.8′E |
|---|
| Reference vessel | 4.5 m draft, 10 kn cruise |
|---|
10-day marine forecast — along the route
| Date | Wind | Gusts | Waves |
|---|
| E 2–11 kn | 14 kn | 0.6–1.1 m |
|---|
| E 6–14 kn | 21 kn | 0.6–0.9 m |
|---|
| E 4–13 kn | 21 kn | 0.6–0.9 m |
|---|
| E 4–15 kn | 20 kn | 0.7–0.8 m |
|---|
| E 4–13 kn | 16 kn | 0.7–1.0 m |
|---|
| ESE 1–15 kn | 19 kn | 0.7–1.0 m |
|---|
| ESE 4–14 kn | 18 kn | 0.6–1.0 m |
|---|
| ENE 11–20 kn | 26 kn | 0.8–0.8 m |
|---|
| ENE 13–14 kn | 20 kn | 0.8–0.8 m |
|---|
| ENE 11–13 kn | 17 kn | 0.5–0.7 m |
|---|
Forecast from the ECMWF IFS model run , waves from ECMWF WAM. Updated with each model cycle; the live chart below recalculates for your departure time and vessel.
Frequently asked
How far is it from Jakarta, Java to Merak Mas Terminal by sea?
The water route is 62 nm (115 km), computed on WXMarine's maritime routing network. The same distance applies on the return passage from Merak Mas Terminal to Jakarta, Java.
How long does the passage from Jakarta, Java to Merak Mas Terminal take?
about 6 hours at a 10 kn cruise. Scale by your own speed: at half the speed it takes about twice as long. The planner on this page recalculates for your vessel and live weather.
What is the weather between Jakarta, Java and Merak Mas Terminal today?
Along the route today, per the ECMWF IFS run 2026-08-03 12z: E wind 2–11 kn, waves 0.6–1.1 m. The day-by-day table on this page covers the next 10 days.