BADAN METEOROLOGI,
KLIMATOLOGI DAN GEOFISIKA
Indonesian Weather Bulletin for Shipping
( Metarea XI)
BMKG Jakarta, Wednesday 03 September 2025 At 0000 UTC
Part I : Warning
TROPICAL LOW 95W AT 19.4°N 132.1°E 1005HPA MAXIMUM WINDS 15 KNOTS MOVING TO NW
Part II : General Synopsis
Tuesday 02 September 2025 at 12 UTC CYCLONIC CIRCULATION AREA IDENTIFIED OVER THE INDIAN OCEAN WEST OF MENTAWAI ISLANDS EASTERLY TO SOUTHERLY GENTLE TO FRESH 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 Thursday 04 September 2025 at 00 UTC
MALACCA STRAIT
Northeasterly
3-9 kt
Slight Sea
INDIAN OCEAN WESTERN OF ACEH
Southwesterly
3-21 kt
Rough Sea
INDIAN OCEAN WESTERN OF LAMPUNG
Easterly
9-21 kt
Rough Sea
INDIAN OCEAN SOUTHERN OF JAVA
Southeasterly
14-21 kt
Rough Sea
INDIAN OCEAN SOUTHERN OF BALI
Easterly
11-19 kt
Rough Sea
NORTH NATUNA SEA
Southwesterly
5-16 kt
Moderate Sea
KARIMATA STRAIT
Northwesterly
3-15 kt
Slight Sea
JAVA SEA
Easterly
14-21 kt
Moderate Sea
MAKASSAR STRAIT
Easterly
9-23 kt
Moderate Sea
BALI SEA
Easterly
4-18 kt
Moderate Sea
SUMBAWA SEA
Easterly
9-19 kt
Moderate Sea
FLORES SEA
Easterly
7-19 kt
Moderate Sea
BANDA SEA
Southeasterly
4-21 kt
Moderate Sea
CERAM SEA
Easterly
1-20 kt
Moderate Sea
SULAWESI SEA
Easterly
1-15 kt
Slight Sea
MOLLUCA SEA
Easterly
1-16 kt
Slight Sea
WESTERN PART OF PACIFIC OCEAN
Easterly
6-14 kt
Slight Sea
ARAFURA SEA
Southeasterly
12-20 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
| 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
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