BADAN METEOROLOGI,
KLIMATOLOGI DAN GEOFISIKA
Indonesian Weather Bulletin for Shipping
( Metarea XI)
BMKG Jakarta, Saturday 06 December 2025 At 0000 UTC
Part I : Warning
TROPICAL LOW 93W 1004HPA AT 11.5°N, 127.3°E MAXIMUM WIND SPEED 20 KNOTS MOVING TO W
Part II : General Synopsis
Friday 05 December 2025 at 12 UTC NORTHWESTERLY TO NORTHEASTERLY GENTLE TO FRESH FLOW IN THE NORTHERN PART OF INDONESIA SOUTHEASTERLY TO SOUTHWESTERLY LIGHT TO MODERATE FLOW IN THE SOUTHERN PART OF INDONESIA
Part III : Area Forecasts
Valid until Sunday 07 December 2025 at 00 UTC
MALACCA STRAIT
Northwesterly
4-9 kt
Smooth Sea
INDIAN OCEAN WESTERN OF ACEH
Northeasterly
1-12 kt
Moderate Sea
INDIAN OCEAN WESTERN OF LAMPUNG
Easterly
5-13 kt
Moderate Sea
INDIAN OCEAN SOUTHERN OF JAVA
Southeasterly
9-17 kt
Moderate Sea
INDIAN OCEAN SOUTHERN OF BALI
Northwesterly
5-10 kt
Moderate Sea
NORTH NATUNA SEA
Northeasterly
7-23 kt
Moderate Sea
KARIMATA STRAIT
Northwesterly
2-13 kt
Slight Sea
JAVA SEA
Westerly
3-14 kt
Slight Sea
MAKASSAR STRAIT
Westerly
4-13 kt
Slight Sea
BALI SEA
Northwesterly
2-14 kt
Slight Sea
SUMBAWA SEA
Northwesterly
1-14 kt
Slight Sea
FLORES SEA
Northwesterly
1-12 kt
Slight Sea
BANDA SEA
Westerly
1-15 kt
Slight Sea
CERAM SEA
Northwesterly
2-16 kt
Slight Sea
SULAWESI SEA
Westerly
10-16 kt
Moderate Sea
MOLLUCA SEA
Southwesterly
4-17 kt
Moderate Sea
WESTERN PART OF PACIFIC OCEAN
Westerly
1-15 kt
Moderate Sea
ARAFURA SEA
Northerly
0-14 kt
Slight 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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