BADAN METEOROLOGI,
KLIMATOLOGI DAN GEOFISIKA
Indonesian Weather Bulletin for Shipping
( Metarea XI)
BMKG Jakarta, Friday 26 December 2025 At 0600 UTC
Part I : Warning
TC GRANT 989 hPa AT 11.9°S 93.5°E MAXIMUM WIND SPEED 50 KNOT MOVE TO W TROPICAL LOW 96S 1003 hPa AT 12.9°S 117.8°E MAXIMUM WIND SPEED 15K NOT MOVE TO ESE
Part II : General Synopsis
Thursday 25 December 2025 at 12 UTC NORTHERLY TO NORTHEASTERLY GENTLE TO STRONG FLOW IN THE NORTHERN PART OF INDONESIA SOUTHWESTERLY TO NORTHWESTERLY GENTLE TO FRESH FLOW IN THE SOUTHERN PART OF INDONESIA
Part III : Area Forecasts
Valid until Saturday 27 December 2025 at 06 UTC
MALACCA STRAIT
Northerly
7-10 kt
Slight Sea
INDIAN OCEAN WESTERN OF ACEH
Northerly
1-18 kt
Moderate Sea
INDIAN OCEAN WESTERN OF LAMPUNG
Westerly
9-19 kt
Moderate Sea
INDIAN OCEAN SOUTHERN OF JAVA
Westerly
8-17 kt
Moderate Sea
INDIAN OCEAN SOUTHERN OF BALI
Westerly
8-19 kt
Rough Sea
NORTH NATUNA SEA
Northeasterly
5-24 kt
Rough Sea
KARIMATA STRAIT
Northerly
2-12 kt
Moderate Sea
JAVA SEA
Westerly
11-18 kt
Moderate Sea
MAKASSAR STRAIT
Northwesterly
8-19 kt
Slight Sea
BALI SEA
Westerly
3-14 kt
Moderate Sea
SUMBAWA SEA
Westerly
5-18 kt
Moderate Sea
FLORES SEA
Northwesterly
3-18 kt
Slight Sea
BANDA SEA
Northwesterly
1-18 kt
Moderate Sea
CERAM SEA
Northerly
2-13 kt
Slight Sea
SULAWESI SEA
Northeasterly
5-15 kt
Moderate Sea
MOLLUCA SEA
Northerly
2-16 kt
Moderate Sea
WESTERN PART OF PACIFIC OCEAN
Northeasterly
4-11 kt
Moderate Sea
ARAFURA SEA
Northwesterly
7-20 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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