BADAN METEOROLOGI,
KLIMATOLOGI DAN GEOFISIKA
Indonesian Weather Bulletin for Shipping
( Metarea XI)
BMKG Jakarta, Thursday 30 April 2026 At 1800 UTC
Part I : Warning
NIL
Part II : General Synopsis
Thursday 30 April 2026 at 12 UTC NORTHEAST TO SOUTHEASTERLY LIGHT TO FRESH FLOW IN THE NORTHERN PART OF INDONESIA NORTHEAST TO SOUTHEASTERLY LIGHT TO FRESH FLOW IN THE SOUTHERN PART OF INDONESIA
Part III : Area Forecasts
Valid until Friday 01 May 2026 at 18 UTC
MALACCA STRAIT
Easterly
5-8 kt
Smooth Sea
INDIAN OCEAN WESTERN OF ACEH
Northwesterly
1-12 kt
Moderate Sea
INDIAN OCEAN WESTERN OF LAMPUNG
Southeasterly
6-14 kt
Rough Sea
INDIAN OCEAN SOUTHERN OF JAVA
Southeasterly
12-17 kt
Rough Sea
INDIAN OCEAN SOUTHERN OF BALI
Southeasterly
9-17 kt
Rough Sea
NORTH NATUNA SEA
Easterly
5-13 kt
Slight Sea
KARIMATA STRAIT
Northeasterly
1-8 kt
Slight Sea
JAVA SEA
Northeasterly
6-12 kt
Slight Sea
MAKASSAR STRAIT
Northeasterly
4-12 kt
Slight Sea
BALI SEA
Easterly
2-14 kt
Slight Sea
SUMBAWA SEA
Easterly
3-12 kt
Slight Sea
FLORES SEA
Easterly
1-14 kt
Slight Sea
BANDA SEA
Southeasterly
1-17 kt
Moderate Sea
CERAM SEA
Easterly
1-13 kt
Slight Sea
SULAWESI SEA
Northeasterly
1-12 kt
Slight Sea
MOLLUCA SEA
Westerly
1-11 kt
Moderate Sea
WESTERN PART OF PACIFIC OCEAN
Northerly
0-9 kt
Moderate Sea
ARAFURA SEA
Southeasterly
5-17 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 :
BULETIN :
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