BADAN METEOROLOGI,
KLIMATOLOGI DAN GEOFISIKA
Indonesian Weather Bulletin for Shipping
( Metarea XI)
BMKG Jakarta, Monday 11 May 2026 At 1200 UTC
Part I : Warning
NIL
Part II : General Synopsis
Monday 11 May 2026 at 00 UTC SOUTHEASTERLY TO SOUTHWESTERLY LIGHT TO MODERATE FLOW IN THE NORTHERN PART OF INDONESIA EASTERLY TO SOUTHEASTERLY GENTLE TO FRESH FLOW IN THE SOUTHERN PART OF INDONESIA
Part III : Area Forecasts
Valid until Tuesday 12 May 2026 at 12 UTC
MALACCA STRAIT
Easterly
8-9 kt
Smooth Sea
INDIAN OCEAN WESTERN OF ACEH
Southeasterly
7-15 kt
Moderate Sea
INDIAN OCEAN WESTERN OF LAMPUNG
Southeasterly
9-15 kt
Rough Sea
INDIAN OCEAN SOUTHERN OF JAVA
Easterly
10-16 kt
Rough Sea
INDIAN OCEAN SOUTHERN OF BALI
Easterly
10-19 kt
Moderate Sea
NORTH NATUNA SEA
Easterly
4-10 kt
Slight Sea
KARIMATA STRAIT
Northeasterly
2-11 kt
Slight Sea
JAVA SEA
Southeasterly
9-16 kt
Slight Sea
MAKASSAR STRAIT
Southeasterly
4-17 kt
Moderate Sea
BALI SEA
Easterly
3-19 kt
Slight Sea
SUMBAWA SEA
Southeasterly
2-16 kt
Slight Sea
FLORES SEA
Easterly
2-18 kt
Moderate Sea
BANDA SEA
Easterly
1-22 kt
Moderate Sea
CERAM SEA
Easterly
3-13 kt
Slight Sea
SULAWESI SEA
Easterly
2-8 kt
Slight Sea
MOLLUCA SEA
Northerly
1-12 kt
Moderate Sea
WESTERN PART OF PACIFIC OCEAN
Easterly
4-14 kt
Moderate Sea
ARAFURA SEA
Southeasterly
6-22 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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