Surf Forecasts:
Batu Karas surf forecast from 17 Oct 2026:
- Best quality surf: Friday 23 Oct, 7AM (local time) - 10ft (3.0m), 18s period, SSW swell with glassy winds.
- Most powerful swell: Friday 23 Oct, 4AM (local time) - 10ft (3.0m), 19s period, SSW swell with 6,661 kJ wave energy.
- Next surfable swell (1★+): Monday 19 Oct, 4AM (local time) - 8ft (2.5m), 16s period with SSW 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 Monday (Oct 19) at 4AM. The primary swell is predicted to be 2.5m and 16s period with a secondary swell of 1.0m and 6s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Batu Karas in the next 16 days are 3.0m 19s and forecast to arrive on Friday (Oct 23) at 4AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 6s period and expected on Sunday (Oct 18) at 10AM.
| Wave Type | Time (WIB) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4AM (Mon 19th Oct) | 8ft (2.5m) 16s |
| Best Surf | 7AM (Fri 23rd Oct) | 10ft (3.0m) 18s |
| Most Powerful | 4AM (Fri 23rd Oct) | 10ft (3.0m) 19s |
Table - best surf conditions forecast for Batu Karas over the next 16 days.
Short Range ForecastSome drizzle, heaviest during Sat night. Warm (max 27°C on Sat morning, min 25°C on Sat afternoon). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 4mm), mostly falling on Tue night. Warm (max 27°C on Tue morning, min 24°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Saturday 17 | Sunday 18 | Monday 19 | Tuesday 20 | Wednesday 21 | Thursday 22 | Friday 23 | |||||||||||||||
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) | SW 18 | SSW 17 | SW 16 | SSW 15 | SSW 15 | SSW 15 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 13 | SSW 18 | SSW 18 | SSW 16 | SSW 16 | SSW 18 | SSW 17 | SSW 17 |
Wave Graph  | |||||||||||||||||||||
 kJ | 319 | 351 | 587 | 1209 | 1447 | 2299 | 2391 | 2015 | 2082 | 1193 | 1034 | 796 | 931 | 538 | 745 | 2897 | 2269 | 3676 | 5777 | 5847 | 4648 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | cross | cross | cross-off | cross-on | cross-off | cross-off | glassy | cross | cross-off | cross-on | cross | cross-off | cross-off | cross-off | cross-off | cross-on | cross-off | cross-off | cross |
High Tide | 11:27AM1.01m | 11:16PM1.41m | 12:06PM0.92m | 11:50PM1.29m | 1:15PM0.85m | 00:38AM1.17m | 5:47PM0.89m | 2:32AM1.08m | 5:54PM1.03m | 4:51AM1.09m | 6:12PM1.17m | 6:00AM1.16m | 6:33PM1.33m | ||||||||
Low Tide | 4:37PM0.55m | 6:14AM0.44m | 4:57PM0.65m | 7:13AM0.55m | 5:16PM0.76m | 8:58AM0.62m | 6:37PM0.89m | 10:41AM0.60m | 11:10PM0.83m | 11:34AM0.56m | 00:10AM0.67m | 12:08PM0.51m | 00:48AM0.49m | ||||||||
 | |  | |  |  | | |  | | | | | | | | | | | | | |
 | 5:22 | — | — | 5:22 | — | — | 5:22 | — | — | 5:22 | — | — | 5:20 | — | — | 5:20 | — | — | 5:20 | — | — |
 | — | 5:38 | — | — | 5:38 | — | — | 5:38 | — | — | 5:38 | — | — | 5:38 | — | — | 5:39 | — | — | 5:39 | — |
mm | — | — | 1 | — | — | — | — | — | — | — | — | 4 | — | — | — | — | — | — | — | — | — |
Temp °C | 27 | 26 | 26 | 26 | 26 | 26 | 27 | 27 | 26 | 27 | 27 | 26 | 27 | 27 | 26 | 27 | 27 | 26 | 28 | 27 | 26 |
Feels °C | 28 | 27 | 29 | 27 | 27 | 30 | 29 | 30 | 30 | 29 | 29 | 30 | 29 | 29 | 30 | 29 | 29 | 29 | 29 | 28 | 30 |
Swell 1 Height (m) Direction Period (s) | SW 13 | SSW 17 | SW 16 | SSW 15 | SSW 15 | SSW 15 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 13 | SW 12 | SSW 18 | SSW 16 | SSW 16 | SSW 18 | SSW 17 | SSW 17 |
| kJ | 215 | 351 | 587 | 1209 | 1447 | 2299 | 2391 | 2015 | 2082 | 1193 | 1034 | 796 | 931 | 538 | 341 | 2897 | 2269 | 3676 | 5777 | 5847 | 4648 |
Swell 2 Height (m) Direction Period (s) | SW 18 | SW 13 | SSW 12 | — | — | SE 6 | SE 6 | — | SSE 7 | SSE 6 | S 26 | SSE 6 | SSW 21 | SSW 20 | SSE 8 | SSE 7 | SSE 8 | SSE 7 | — | — | — |
| kJ | 319 | 180 | 129 | — | — | 54 | 71 | — | 91 | 74 | 13 | 56 | 359 | 432 | 120 | 143 | 151 | 114 | — | — | — |
Swell 3 Height (m) Direction Period (s) | S 11 | S 10 | — | — | — | — | — | — | — | — | — | SSW 24 | — | — | SSW 18 | — | — | SSE 7 | — | — | — |
| kJ | 81 | 47 | — | — | — | — | — | — | — | — | — | 108 | — | — | 745 | — | — | 140 | — | — | — |
Wind waves Height (m) Direction Period (s) | SE 6 | SE 6 | SE 6 | SE 6 | SE 6 | — | — | SE 6 | — | — | SSE 6 | — | — | SSE 7 | — | — | — | — | — | — | — |
| kJ | 69 | 62 | 61 | 75 | 66 | — | — | 78 | — | — | 62 | — | — | 96 | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 519 | 519 | 230 | 655 | 734 | 8 | 519 | 0 | 0 | 230 | 655 | 230 | 230 | 233 | 0 | 0 | 519 | 230 | 0 | 233 | 8 |
Best forecast wave conditions in Central Java | |||||||||||||||||||||
Best forecast wave conditions in Indonesia | |||||||||||||||||||||
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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Batu Karas surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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.
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