Indonesian Weather Bulletin for Shipping
( Metarea XI)

BMKG Jakarta, Wednesday 10 June 2026 At 0000 UTC

Part I : Warning

NIL

Part II : General Synopsis

Tuesday 09 June 2026 at 12 UTC SOUTHEASTERLY TO SOUTHWESTERLY LIGHT TO STRONG FLOW IN THE NORTHERN PART OF INDONESIA EASTERLY TO SOUTHEASTERLY LIGHT TO FRESH FLOW IN THE SOUTHERN PART OF INDONESIA

Part III : Area Forecasts

Valid until Thursday 11 June 2026 at 00 UTC

MALACCA STRAIT

Northerly
8-10 kt
Slight Sea

INDIAN OCEAN WESTERN OF ACEH

Westerly
8-19 kt
Moderate Sea

INDIAN OCEAN WESTERN OF LAMPUNG

Southeasterly
9-16 kt
Rough Sea

INDIAN OCEAN SOUTHERN OF JAVA

Southeasterly
13-17 kt
Rough Sea

INDIAN OCEAN SOUTHERN OF BALI

Easterly
10-16 kt
Moderate Sea

NORTH NATUNA SEA

Southwesterly
5-16 kt
Slight Sea

KARIMATA STRAIT

Northeasterly
4-15 kt
Moderate Sea

JAVA SEA

Southeasterly
9-15 kt
Slight Sea

MAKASSAR STRAIT

Southeasterly
6-16 kt
Moderate Sea

BALI SEA

Easterly
6-14 kt
Moderate Sea

SUMBAWA SEA

Southeasterly
4-14 kt
Moderate Sea

FLORES SEA

Southeasterly
4-15 kt
Slight Sea

BANDA SEA

Southeasterly
4-19 kt
Moderate Sea

CERAM SEA

Easterly
1-17 kt
Moderate Sea

SULAWESI SEA

Northeasterly
1-12 kt
Moderate Sea

MOLLUCA SEA

Northeasterly
1-16 kt
Slight Sea

WESTERN PART OF PACIFIC OCEAN

Easterly
3-14 kt
Slight Sea

ARAFURA SEA

Southeasterly
11-19 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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