BADAN METEOROLOGI,
KLIMATOLOGI DAN GEOFISIKA
Indonesian Weather Bulletin for Shipping
( Metarea XI)
BMKG Jakarta, Thursday 11 September 2025 At 1800 UTC
Part I : Warning
TROPICAL LOW AT 6.2S 95.5E 1004HPA MAXIMUM WIND 30 KNOT MOVE TO S
Part II : General Synopsis
Thursday 11 September 2025 at 00 UTC SOUTHEASTERLY TO SOUTHWESTERLY LIGHT TO MODERATE FLOW IN THE NORTHERN PART OF INDONESIA EASTERLY TO SOUTHEASTERLY GENTLE TO STRONG FLOW IN THE SOUTHERN PART OF INDONESIA
Part III : Area Forecasts
Valid until Friday 12 September 2025 at 18 UTC
MALACCA STRAIT
Northerly
2-8 kt
Slight Sea
INDIAN OCEAN WESTERN OF ACEH
Westerly
2-14 kt
Moderate Sea
INDIAN OCEAN WESTERN OF LAMPUNG
Northeasterly
5-13 kt
Moderate Sea
INDIAN OCEAN SOUTHERN OF JAVA
Southeasterly
9-16 kt
Moderate Sea
INDIAN OCEAN SOUTHERN OF BALI
Southeasterly
10-13 kt
Moderate Sea
NORTH NATUNA SEA
Westerly
1-15 kt
Moderate Sea
KARIMATA STRAIT
Westerly
6-15 kt
Moderate Sea
JAVA SEA
Southeasterly
3-14 kt
Slight Sea
MAKASSAR STRAIT
Southeasterly
6-17 kt
Moderate Sea
BALI SEA
Northeasterly
4-19 kt
Moderate Sea
SUMBAWA SEA
Easterly
2-17 kt
Moderate Sea
FLORES SEA
Easterly
4-17 kt
Slight Sea
BANDA SEA
Southeasterly
5-20 kt
Moderate Sea
CERAM SEA
Easterly
1-15 kt
Slight Sea
SULAWESI SEA
Northwesterly
0-11 kt
Slight Sea
MOLLUCA SEA
Westerly
1-17 kt
Slight Sea
WESTERN PART OF PACIFIC OCEAN
Northerly
0-8 kt
Moderate Sea
ARAFURA SEA
Southeasterly
3-19 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
| Force | Description | Speed (knots) |
|---|---|---|
| 0 | Calm | < 1 |
| 1 | Light air | 1-3 |
| 2 | Light breeze | 4-6 |
| 3 | Gentle breeze | 7-10 |
| 4 | Moderate breeze | 11-16 |
| 5 | Fresh breeze | 17-21 |
| 6 | Strong breeze | 22-27 |
| 7 | Near gale | 28-33 |
| 8 | Gale | 34-40 |
| 9 | Strong gale | 41-47 |
Douglas Sea Scale
| Grade | Description | Height (m) |
|---|---|---|
| 0 | Calm (Glassy) | 0 |
| 1 | Calm (Rippled) | 0-0.1 |
| 2 | Smooth | 0.1-0.5 |
| 3 | Slight | 0.5-1.25 |
| 4 | Moderate | 1.25-2.5 |
| 5 | Rough | 2.5-4 |
| 6 | Very rough | 4-6 |
| 7 | High | 6-9 |
| 8 | Very high | 9-14 |
| 9 | Phenomenal | >14 |
KONTAK KAMI :
Jl. Angkasa I No.2 Kemayoran, Jakarta Pusat 10610, PO Box 3540 Jkt.
Call Center (021) 196
Fax (021) 4246703
cc196@bmkg.go.id
TAUTAN :
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