
Surf Forecasts:
Batu Karas surf forecast from 9 Sep 2026:
- Best quality surf: Saturday 12 Sep, 4PM (local time) - 6ft (1.8m), 19s period, SW swell with cross-offshore winds.
- Most powerful swell: Sunday 13 Sep, 1AM (local time) - 8ft (2.4m), 18s period, SW swell with 3,641 kJ wave energy.
- Next surfable swell (1★+): Saturday 12 Sep, 4PM (local time) - 6ft (1.8m), 19s period with SW swell.
Best Forecast Surf Conditions for Batu Karas this week:
The surf forecast for Batu Karas over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Sep 12) at 4PM. The primary swell is predicted to be 1.8m and 19s period with a secondary swell of 1.4m and 14s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Batu Karas in the next 16 days are 2.4m 18s and forecast to arrive on Sunday (Sep 13) at 1AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 6s period and expected on Saturday (Sep 12) at 1PM.
| Wave Type | Time (WIB) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4PM (Sat 12th Sep) | 6ft (1.8m) 19s |
| Best Surf | 4PM (Sat 12th Sep) | 6ft (1.8m) 19s |
| Most Powerful | 1AM (Sun 13th Sep) | 8ft (2.4m) 18s |
Table - best surf conditions forecast for Batu Karas over the next 16 days.
Short Range ForecastLight rain (total 5mm), mostly falling on Wed morning. Warm (max 25°C on Wed morning, min 23°C on Wed night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 2mm), mostly falling on Sun night. Warm (max 25°C on Sat morning, min 23°C on Sat night). Wind will be generally light. | ||||||||||||||||||||
Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map | |||||||||||||||||||||
Wave Height (m) Direction Period (s) | SSW 16 | SSW 15 | SSW 15 | SSW 16 | SSW 16 | SSW 16 | SW 16 | SW 15 | SW 14 | SW 15 | SW 19 | SW 18 | SSW 17 | SSW 16 | SW 16 | SW 16 | SW 16 | SW 15 | SW 15 | SW 15 | SSW 15 |
Wave Graph | |||||||||||||||||||||
2883 | 1632 | 1613 | 2417 | 2002 | 1743 | 1531 | 1271 | 928 | 776 | 2315 | 3641 | 3296 | 3100 | 2002 | 1761 | 1761 | 1716 | 1547 | 1271 | 1158 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | cross | cross | cross-off | cross | cross | cross-off | cross | cross | cross-off | cross-on | cross | cross-off | cross-on | cross | cross | glassy | cross | cross-off | cross |
High Tide | 7:31PM1.20m | 7:15AM1.54m | 8:01PM1.39m | 8:01AM1.59m | 8:31PM1.55m | 8:40AM1.60m | 9:00PM1.67m | 9:16AM1.56m | 9:29PM1.74m | 9:49AM1.49m | 9:57PM1.75m | 10:20AM1.38m | 10:25PM1.72m | ||||||||
Low Tide | 1:02AM0.52m | 1:49PM0.21m | 1:52AM0.36m | 2:20PM0.17m | 2:34AM0.23m | 2:49PM0.16m | 3:13AM0.14m | 3:16PM0.17m | 3:48AM0.11m | 3:41PM0.20m | 4:22AM0.12m | 4:05PM0.26m | |||||||||
5:43 | — | — | 5:41 | — | — | 5:41 | — | — | 5:41 | — | — | 5:41 | — | — | 5:39 | — | — | 5:39 | — | — | |
— | 5:43 | — | — | 5:43 | — | — | 5:43 | — | — | 5:43 | — | — | 5:43 | — | — | 5:43 | — | — | 5:43 | — | |
mm | 1 | — | 2 | — | — | — | — | — | 2 | — | — | — | — | — | 1 | — | — | 1 | 1 | 1 | 5 |
Temp °C | 25 | 24 | 24 | 25 | 25 | 24 | 25 | 25 | 24 | 25 | 25 | 24 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 24 |
Feels °C | 26 | 25 | 26 | 26 | 26 | 26 | 27 | 27 | 27 | 27 | 27 | 28 | 27 | 27 | 28 | 26 | 26 | 27 | 26 | 26 | 25 |
Swell 1 Height (m) Direction Period (s) | SSW 16 | SSW 15 | SSW 15 | SSW 16 | SSW 16 | SSW 16 | SW 16 | SW 15 | SW 14 | SW 15 | SW 19 | SW 18 | SSW 17 | SSW 16 | SW 16 | SW 16 | SW 16 | SW 15 | SW 15 | SW 15 | SSW 15 |
2883 | 1632 | 1613 | 2417 | 2002 | 1743 | 1531 | 1271 | 928 | 773 | 2315 | 3641 | 3296 | 3100 | 2002 | 1761 | 1761 | 1716 | 1547 | 1271 | 1158 | |
Swell 2 Height (m) Direction Period (s) | S 12 | SSE 11 | SSW 18 | — | S 28 | SSE 10 | SW 24 | SSW 24 | SSW 21 | SW 20 | SSW 14 | ESE 6 | — | — | — | S 10 | — | — | W 16 | S 24 | — |
26 | 380 | 609 | — | 16 | 263 | 142 | 218 | 799 | 776 | 796 | 41 | — | — | — | 2 | — | — | 5 | 11 | — | |
Swell 3 Height (m) Direction Period (s) | — | — | S 11 | — | — | SSW 26 | — | — | S 9 | S 9 | SE 6 | SE 6 | — | — | — | S 11 | — | — | — | — | — |
— | — | 21 | — | — | 66 | — | — | 80 | 74 | 72 | 46 | — | — | — | 2 | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | SSE 10 | — | SSE 10 | SSE 9 | SSE 9 | ESE 5 | ESE 6 | — | — | — | SE 6 | SE 6 | SE 7 | SE 7 | SE 7 | SE 7 | SE 6 |
— | — | — | — | 214 | — | 210 | 161 | 176 | 56 | 55 | — | — | — | 82 | 104 | 140 | 168 | 163 | 124 | 113 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 519 | 519 | 519 | 519 | 519 | 18 | 519 | 519 | 18 | 230 | 0 | 6 | 230 | 0 | 6 | 519 | 717 | 0 | 519 | 230 | 230 |
Best forecast wave conditions in Central Java | |||||||||||||||||||||
Best forecast wave conditions in Indonesia | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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Information about the Batu Karas Surf forecast
The above surf forecast table for Batu Karas provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Batu Karas can be found by selecting the local surf guide option on the grey menu. Our Batu Karas surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Batu Karas) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).
Further information to help with frequently asked questions about our surf forecast for Batu Karas may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.
Batu Karas is 43 km (27 miles) from the city of Sidareja. If you plan a holiday in Central Java, look for hotels and other accommodation in Sidareja. Sidareja has rooms for a wide range of budgets as well as car hire and transport links.










