BADAN METEOROLOGI,
KLIMATOLOGI DAN GEOFISIKA
Indonesian Weather Bulletin for Shipping
( Metarea XI)
BMKG Jakarta, Tuesday 23 December 2025 At 0000 UTC
Part I : Warning
TROPICAL LOW 93S NEAR 12.7°S 102.8°E 998HPA MAXIMUM WINDS 35KT MOVE TO W
Part II : General Synopsis
Monday 22 December 2025 at 12 UTC NORTHERLY TO NORTHEASTERLY GENTLE TO STRONG FLOW IN THE NORTHERN PART OF INDONESIA SOUTHWESTERLY TO NORTHWESTERLY GENTLE TO STRONG FLOW IN THE SOUTHERN PART OF INDONESIA
Part III : Area Forecasts
Valid until Wednesday 24 December 2025 at 00 UTC
MALACCA STRAIT
Northwesterly
6-12 kt
Slight Sea
INDIAN OCEAN WESTERN OF ACEH
Northerly
2-18 kt
Moderate Sea
INDIAN OCEAN WESTERN OF LAMPUNG
Northwesterly
11-21 kt
Moderate Sea
INDIAN OCEAN SOUTHERN OF JAVA
Northwesterly
9-20 kt
Moderate Sea
INDIAN OCEAN SOUTHERN OF BALI
Westerly
13-19 kt
Moderate Sea
NORTH NATUNA SEA
Northerly
8-21 kt
Moderate Sea
KARIMATA STRAIT
Northwesterly
11-18 kt
Moderate Sea
JAVA SEA
Westerly
8-18 kt
Moderate Sea
MAKASSAR STRAIT
Westerly
5-17 kt
Slight Sea
BALI SEA
Westerly
2-14 kt
Slight Sea
SUMBAWA SEA
Westerly
2-19 kt
Slight Sea
FLORES SEA
Westerly
3-17 kt
Slight Sea
BANDA SEA
Northwesterly
2-19 kt
Moderate Sea
CERAM SEA
Northwesterly
4-13 kt
Slight Sea
SULAWESI SEA
Northerly
4-13 kt
Moderate Sea
MOLLUCA SEA
Northerly
1-15 kt
Moderate Sea
WESTERN PART OF PACIFIC OCEAN
Easterly
3-11 kt
Moderate Sea
ARAFURA SEA
Northwesterly
1-14 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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