Indonesian Weather Bulletin for Shipping
( Metarea XI)

BMKG Jakarta, Saturday 29 March 2025 At 0230 UTC

Part I : Warning

GALE WARNING 17.3°S, 94.4°E 952 HPA MOVE TO WEST MAXIMUM WINDS 95 KNOTS GALE WARNING 15.7° S, 123.7° E 989 HPA MOVE TO SOUTH MAXIMUM WINDS 40 KNOTS

Part II : General Synopsis

Friday 28 March 2025 at 12 UTC NORHTWESTERLY TO NORTHEASTERLY LIGHT TO MODERATE FLOW IN NORTHERN PART OF INDONESIA WESTERLY TO NORTHWESTERLY LIGHT TO STRONG FLOW IN SOUTHERN PART OF INDONESIA

Part III : Area Forecasts

Valid until Sunday 30 March 2025 at 03 UTC

MALACCA STRAIT

Northerly
2-11 kt
Moderate Sea

INDIAN OCEAN WESTERN OF ACEH

Northerly
0-17 kt
Moderate Sea

INDIAN OCEAN WESTERN OF LAMPUNG

Westerly
3-17 kt
Moderate Sea

INDIAN OCEAN SOUTHERN OF JAVA

Westerly
4-14 kt
Moderate Sea

INDIAN OCEAN SOUTHERN OF BALI

Westerly
7-22 kt
Moderate Sea

NORTH NATUNA SEA

Northeasterly
3-13 kt
Slight Sea

KARIMATA STRAIT

Northerly
0-24 kt
Slight Sea

JAVA SEA

Westerly
4-23 kt
Slight Sea

MAKASSAR STRAIT

Westerly
5-21 kt
Slight Sea

BALI SEA

Northwesterly
5-15 kt
Slight Sea

SUMBAWA SEA

Northwesterly
4-18 kt
Slight Sea

FLORES SEA

Northwesterly
0-23 kt
Slight Sea

BANDA SEA

Northerly
0-23 kt
Slight Sea

CERAM SEA

Northerly
0-17 kt
Slight Sea

SULAWESI SEA

Northeasterly
4-18 kt
Moderate Sea

MOLLUCA SEA

Northeasterly
1-23 kt
Moderate Sea

WESTERN PART OF PACIFIC OCEAN

Easterly
3-27 kt
Moderate Sea

ARAFURA SEA

Northerly
0-20 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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