BADAN METEOROLOGI,
KLIMATOLOGI DAN GEOFISIKA
Indonesian Weather Bulletin for Shipping
( Metarea XI)
BMKG Jakarta, Tuesday 20 May 2025 At 0600 UTC
Part I : Warning
NIL
Part II : General Synopsis
Monday 19 May 2025 at 12 UTC NORTHEASTERLY TO SOUTHEASTERLY LIGHT TO MODERATE FLOW IN THE NORTHERN PART OF INDONESIA SOUTHEASTERLY TO SOUTHWESTERLY GENTLE TO FRESH FLOW IN THE SOUTHERN PART OF INDONESIA
Part III : Area Forecasts
Valid until Wednesday 21 May 2025 at 06 UTC
MALACCA STRAIT
Northwesterly
0-15 kt
Moderate Sea
INDIAN OCEAN WESTERN OF ACEH
Northeasterly
6-11 kt
Moderate Sea
INDIAN OCEAN WESTERN OF LAMPUNG
Southeasterly
8-22 kt
Moderate Sea
INDIAN OCEAN SOUTHERN OF JAVA
Southeasterly
14-24 kt
Moderate Sea
INDIAN OCEAN SOUTHERN OF BALI
Southeasterly
10-21 kt
Moderate Sea
NORTH NATUNA SEA
Northerly
2-21 kt
Moderate Sea
KARIMATA STRAIT
Easterly
1-21 kt
Slight Sea
JAVA SEA
Easterly
12-24 kt
Moderate Sea
MAKASSAR STRAIT
Easterly
5-23 kt
Slight Sea
BALI SEA
Easterly
4-20 kt
Slight Sea
SUMBAWA SEA
Easterly
4-18 kt
Slight Sea
FLORES SEA
Easterly
4-17 kt
Slight Sea
BANDA SEA
Southeasterly
0-27 kt
Moderate Sea
CERAM SEA
Northeasterly
0-18 kt
Slight Sea
SULAWESI SEA
Northerly
0-22 kt
Slight Sea
MOLLUCA SEA
Northerly
0-21 kt
Slight Sea
WESTERN PART OF PACIFIC OCEAN
Northerly
0-12 kt
Slight Sea
ARAFURA SEA
Easterly
1-28 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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