BADAN METEOROLOGI,
KLIMATOLOGI DAN GEOFISIKA
Indonesian Weather Bulletin for Shipping
( Metarea XI)
BMKG Jakarta, Tuesday 22 July 2025 At 0600 UTC
Part I : Warning
- TROPICAL LOW 97W AT 16.8°N 133.2° E 1006 HPA MAXIMUM WINDS 20 KNOTS MOVING TO NW - TROPICAL LOW 99W AT 19.9° N 123.9°E 1004 HPA MAXIMUM WINDS 15 KNOTS MOVING TO NW
Part II : General Synopsis
Monday 21 July 2025 at 12 UTC SOUTHEASTERLY TO SOUTHWESTERLY GENTLE TO FRESH FLOW IN THE NORTHERN PART OF INDONESIA EASTERLY TO SOUTHEASTERLY GENTLE TO MODERATE FLOW IN THE SOUTHERN PART OF INDONESIA
Part III : Area Forecasts
Valid until Wednesday 23 July 2025 at 06 UTC
MALACCA STRAIT
Northwesterly
1-24 kt
Rough Sea
INDIAN OCEAN WESTERN OF ACEH
Southwesterly
1-21 kt
Rough Sea
INDIAN OCEAN WESTERN OF LAMPUNG
Southeasterly
10-20 kt
Rough Sea
INDIAN OCEAN SOUTHERN OF JAVA
Easterly
11-19 kt
Rough Sea
INDIAN OCEAN SOUTHERN OF BALI
Easterly
7-15 kt
Moderate Sea
NORTH NATUNA SEA
Southwesterly
6-17 kt
Slight Sea
KARIMATA STRAIT
Easterly
8-17 kt
Slight Sea
JAVA SEA
Southeasterly
10-18 kt
Slight Sea
MAKASSAR STRAIT
Southeasterly
7-18 kt
Moderate Sea
BALI SEA
Easterly
3-15 kt
Slight Sea
SUMBAWA SEA
Southeasterly
3-15 kt
Slight Sea
FLORES SEA
Easterly
4-17 kt
Slight Sea
BANDA SEA
Southeasterly
3-18 kt
Slight Sea
CERAM SEA
Easterly
0-17 kt
Slight Sea
SULAWESI SEA
Easterly
2-16 kt
Moderate Sea
MOLLUCA SEA
Northwesterly
1-17 kt
Moderate Sea
WESTERN PART OF PACIFIC OCEAN
Northeasterly
1-10 kt
Slight Sea
ARAFURA SEA
Southeasterly
9-19 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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