Surf Forecasts:
How big are the waves at Mandiri today (20 Sep):
- Afternoon surf: Afternoon surf (20 Sep, local time) - 7ft (2.2m), 16s period with SW swell.
- Evening surf: Evening surf (20 Sep, local time) - 7ft (2.1m), 15s period with SSW swell.
The current surf forecast for Mandiri at 10PM is: 2.0m 15s primary swell from a South-southwest direction and 1.1m 7s secondary swell from a South-southeast direction, 1.3m 7s secondary swell from a South-southeast direction (forecast issued at 06:00pm September 20). The wind direction is predicted to be cross-offshore and the swell rating is 4.
| Time (WIB) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 Sep) | - | - |
| Afternoon (20 Sep) | 7ft (2.2m) | 16s |
| Evening (20 Sep) | 7ft (2.1m) | 15s |
Table - waves today at Mandiri. (Swell directed towards the surf break)
Short Range ForecastHeavy rain (total 24mm), heaviest during Tue afternoon. Warm (max 29°C on Mon morning, min 24°C on Sun night). Wind will be generally light. | |||||||||||||||||||
Sun 20 | Monday 21 | Tuesday 22 | |||||||||||||||||
4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||
Wave Height (m) Direction Period (s) | SW 16 | SW 15 | SSW 15 | SSW 14 | SSW 14 | SW 14 | SSW 14 | SSW 14 | SW 14 | SSW 13 | SW 13 | SSW 13 | SW 13 | SW 13 | SSW 19 | SSW 18 | SSW 18 | SSW 18 | SSW 17 |
Wave Graph  | |||||||||||||||||||
 kJ | 2233 | 2065 | 1737 | 1690 | 1956 | 1303 | 1680 | 1065 | 893 | 820 | 721 | 581 | 501 | 486 | 560 | 768 | 1245 | 1922 | 2048 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross-off | cross-off | cross-off | cross-off | cross-on | cross-on | cross-on | cross | cross-off | cross-off | cross-off | cross-off | cross | cross-on | cross-on | cross | cross-off |
High Tide | 1:22AM0.82m | 4:05PM0.49m | 3:02AM0.82m | 5:08PM0.58m | |||||||||||||||
Low Tide | 4:50PM0.40m | 10:17AM0.38m | 6:07PM0.48m | 11:04AM0.33m | 9:26PM0.50m | ||||||||||||||
 |  |  |  | |  | | | | | | | |  | | | | | | |
 | — | — | — | — | 5:54 | — | — | — | — | — | — | — | 5:54 | — | — | — | — | — | — |
 | 6:00 | — | — | — | — | — | — | — | 6:00 | — | — | — | — | — | — | — | 6:00 | — | — |
mm | 1 | 3 | — | 2 | — | — | — | 1 | 1 | 3 | 1 | — | 2 | 3 | — | 1 | 1 | 4 | 1 |
Temp °C | 28 | 25 | 25 | 24 | 25 | 25 | 29 | 28 | 28 | 25 | 25 | 25 | 24 | 25 | 28 | 28 | 27 | 25 | 25 |
Feels °C | 30 | 28 | 28 | 28 | 29 | 28 | 32 | 30 | 31 | 28 | 28 | 28 | 27 | 28 | 31 | 30 | 29 | 28 | 28 |
Swell 1 Height (m) Direction Period (s) | SW 16 | SW 15 | SSW 15 | SSW 14 | SSW 14 | SW 14 | SSW 14 | SSW 14 | SW 14 | SSW 13 | SW 13 | SSW 13 | SW 13 | SW 13 | SSW 13 | SSW 18 | SSW 18 | SSW 18 | SSW 17 |
| kJ | 2233 | 2065 | 1737 | 1690 | 1956 | 1303 | 1680 | 1065 | 893 | 820 | 721 | 581 | 501 | 486 | 437 | 768 | 1245 | 1922 | 2048 |
Swell 2 Height (m) Direction Period (s) | WNW 8 | WNW 8 | SSE 7 | S 7 | W 17 | S 7 | W 8 | SW 20 | S 7 | SSW 19 | SW 19 | SSW 19 | S 7 | S 7 | S 7 | SW 13 | SW 13 | S 11 | S 7 |
| kJ | 6 | 6 | 118 | 97 | 5 | 127 | 1 | 16 | 109 | 37 | 94 | 140 | 127 | 109 | 109 | 364 | 311 | 21 | 112 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | W 16 | — | W 8 | SW 20 | W 16 | S 13 | S 12 | SSW 19 | SSW 19 | SSW 19 | S 12 | S 11 | — | S 11 |
| kJ | — | — | — | — | — | 5 | — | 1 | 15 | 5 | 3 | 3 | 236 | 460 | 560 | 24 | 10 | — | 10 |
Wind waves Height (m) Direction Period (s) | S 7 | S 7 | SSE 7 | SSE 7 | SSE 7 | SSE 7 | SSE 7 | S 7 | SSE 7 | S 7 | S 7 | S 7 | SSE 7 | SSE 7 | SSE 7 | S 7 | S 8 | S 7 | SSE 7 |
| kJ | 110 | 110 | 154 | 149 | 153 | 158 | 149 | 106 | 167 | 109 | 106 | 103 | 181 | 158 | 158 | 109 | 138 | 109 | 158 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 56 | 9 | 0 | 0 | 0 | 0 | 56 | 536 | 56 | 9 | 0 | 0 | 0 | 0 | 9 | 536 | 536 | 9 | 0 |
Best forecast wave conditions in Indonesia - Sumatra - Mainland | |||||||||||||||||||
Best forecast wave conditions in Indonesia | |||||||||||||||||||
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