BADAN METEOROLOGI,
KLIMATOLOGI DAN GEOFISIKA
Indonesian Weather Bulletin for Shipping
( Metarea XI)
BMKG Jakarta, Tuesday 11 August 2026 At 0600 UTC
Part I : Warning
Nil.
Part II : General Synopsis
Tuesday 11 August 2026 at 00 UTC SOUTHEASTERLY TO SOUTHWESTERLY GENTLE TO STRONG FLOW IN THE NORTHERN PART OF INDONESIA EASTERLY TO SOUTHEASTERLY GENTLE TO STRONG FLOW IN THE SOUTHERN PART OF INDONESIA
Part III : Area Forecasts
Valid until Wednesday 12 August 2026 at 06 UTC
INDIAN OCEAN WESTERN OF ACEH
Westerly
8-8 kt
Moderate Sea
INDIAN OCEAN WESTERN OF LAMPUNG
Southeasterly
17-16 kt
Rough Sea
INDIAN OCEAN SOUTHERN OF JAVA
Easterly
19-18 kt
Rough Sea
INDIAN OCEAN SOUTHERN OF BALI
Southeasterly
14-12 kt
Rough Sea
NORTH NATUNA SEA
Southwesterly
14-12 kt
Slight Sea
KARIMATA STRAIT
Easterly
14-13 kt
Slight Sea
JAVA SEA
Southeasterly
16-14 kt
Slight Sea
MAKASSAR STRAIT
Southeasterly
14-13 kt
Slight Sea
BALI SEA
Easterly
13-11 kt
Slight Sea
SUMBAWA SEA
Southeasterly
12-11 kt
Slight Sea
FLORES SEA
Easterly
10-9 kt
Smooth Sea
BANDA SEA
Southeasterly
13-12 kt
Slight Sea
CERAM SEA
Easterly
12-11 kt
Slight Sea
SULAWESI SEA
Easterly
9-7 kt
Slight Sea
MOLLUCA SEA
Westerly
14-13 kt
Slight Sea
WESTERN PART OF PACIFIC OCEAN
Easterly
7-5 kt
Smooth Sea
ARAFURA SEA
Southeasterly
13-12 kt
Slight 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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