Indonesian Weather Bulletin for Shipping
( Metarea XI)

BMKG Jakarta, Friday 06 June 2025 At 0600 UTC

Part I : Warning

LOW PRESSURE AREA 92W AT 12.3°N 129.6°E 1003 HPA MAXIMUM WINDS 15 KNOTS MOVING TO NW

Part II : General Synopsis

Thursday 05 June 2025 at 12 UTC SOUTHEASTERLY TO SOUTHWESTERLY GENTLE TO MODERATE FLOW IN THE NORTHERN PART OF INDONESIA SOUTHERLY TO SOUTHEASTERLY GENTLE TO FRESH FLOW IN THE SOUTHERN PART OF INDONESIA

Part III : Area Forecasts

Valid until Saturday 07 June 2025 at 06 UTC

MALACCA STRAIT

Westerly
0-20 kt
Moderate Sea

INDIAN OCEAN WESTERN OF ACEH

Southwesterly
2-15 kt
Moderate Sea

INDIAN OCEAN WESTERN OF LAMPUNG

Easterly
1-14 kt
Moderate Sea

INDIAN OCEAN SOUTHERN OF JAVA

Easterly
0-19 kt
Moderate Sea

INDIAN OCEAN SOUTHERN OF BALI

Southeasterly
12-20 kt
Moderate Sea

NORTH NATUNA SEA

Southwesterly
7-38 kt
Slight Sea

KARIMATA STRAIT

Northwesterly
1-36 kt
Slight Sea

JAVA SEA

Southeasterly
5-18 kt
Slight Sea

MAKASSAR STRAIT

Southeasterly
5-22 kt
Slight Sea

BALI SEA

Easterly
1-18 kt
Slight Sea

SUMBAWA SEA

Southeasterly
1-18 kt
Slight Sea

FLORES SEA

Easterly
3-23 kt
Slight Sea

BANDA SEA

Southeasterly
2-28 kt
Moderate Sea

CERAM SEA

Easterly
1-23 kt
Slight Sea

SULAWESI SEA

Westerly
7-23 kt
Slight Sea

MOLLUCA SEA

Westerly
1-20 kt
Slight Sea

WESTERN PART OF PACIFIC OCEAN

Northeasterly
1-18 kt
Slight Sea

ARAFURA SEA

Southeasterly
9-28 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
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