Indonesian Weather Bulletin for Shipping
( Metarea XI)

BMKG Jakarta, Thursday 20 March 2025 At 1430 UTC

Part I : Warning

GALE WARNING AT 13.2°S 95.0°E 991 HPA MAXIMUM WIND SPEED 45 KT MOVE TO NW

Part II : General Synopsis

Thursday 20 March 2025 at 00 UTC NOTHWESTERLY TO NORTHEASTERLY LIGHT TO STRONG FLOW IN NOTHERN PART OF INDONESIA SOUTHWESTERLY TO NORTHWESTERLY GENTLE TO STRONG FLOW IN SOUTHERN PART OF INDONESIA

Part III : Area Forecasts

Valid until Friday 21 March 2025 at 15 UTC

MALACCA STRAIT

Easterly
4-25 kt
Moderate Sea

INDIAN OCEAN WESTERN OF ACEH

Northerly
0-21 kt
Moderate Sea

INDIAN OCEAN WESTERN OF LAMPUNG

Westerly
9-20 kt
Moderate Sea

INDIAN OCEAN SOUTHERN OF JAVA

Westerly
9-20 kt
Moderate Sea

INDIAN OCEAN SOUTHERN OF BALI

Westerly
1-32 kt
Rough Sea

NORTH NATUNA SEA

Northeasterly
6-32 kt
Rough Sea

KARIMATA STRAIT

Northerly
3-23 kt
Rough Sea

JAVA SEA

Westerly
7-29 kt
Moderate Sea

MAKASSAR STRAIT

Westerly
3-32 kt
Moderate Sea

BALI SEA

Westerly
4-20 kt
Slight Sea

SUMBAWA SEA

Westerly
2-31 kt
Slight Sea

FLORES SEA

Westerly
6-26 kt
Slight Sea

BANDA SEA

Northwesterly
0-27 kt
Moderate Sea

CERAM SEA

Northwesterly
1-23 kt
Moderate Sea

SULAWESI SEA

Northwesterly
1-25 kt
Moderate Sea

MOLLUCA SEA

Northerly
1-29 kt
Moderate Sea

WESTERN PART OF PACIFIC OCEAN

Northeasterly
3-19 kt
Moderate Sea

ARAFURA SEA

Northerly
2-24 kt
Moderate Sea

⚠️ Important Notes

Please be aware, wind gusts can be a further 40 percent stronger than the averages given here, and maximum waves may be up to twice the significant height

Reference Scales

Beaufort Wind Scale

ForceDescriptionSpeed (knots)
0Calm< 1
1Light air1-3
2Light breeze4-6
3Gentle breeze7-10
4Moderate breeze11-16
5Fresh breeze17-21
6Strong breeze22-27
7Near gale28-33
8Gale34-40
9Strong gale41-47

Douglas Sea Scale

GradeDescriptionHeight (m)
0Calm (Glassy)0
1Calm (Rippled)0-0.1
2Smooth0.1-0.5
3Slight0.5-1.25
4Moderate1.25-2.5
5Rough2.5-4
6Very rough4-6
7High6-9
8Very high9-14
9Phenomenal>14
Download document inPDF Format