
Surf Forecasts:
Batu Karas surf forecast from 20 Sep 2026:
- Best quality surf: Wednesday 23 Sep, 10PM (local time) - 6ft (1.9m), 14s period, SSW swell with glassy winds.
- Most powerful swell: Saturday 26 Sep, 10PM (local time) - 8ft (2.5m), 18s period, SSW swell with 4,536 kJ wave energy.
- Next surfable swell (1★+): Wednesday 23 Sep, 10PM (local time) - 6ft (1.9m), 14s 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 Wednesday (Sep 23) at 10PM. The primary swell is predicted to be 1.9m and 14s period with a secondary swell of 0.7m 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 2.5m 18s and forecast to arrive on Saturday (Sep 26) at 10PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 6s period and expected on Monday (Sep 21) at 10AM.
| Wave Type | Time (WIB) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Wed 23rd Sep) | 6ft (1.9m) 14s |
| Best Surf | 10PM (Wed 23rd Sep) | 6ft (1.9m) 14s |
| Most Powerful | 10PM (Sat 26th Sep) | 8ft (2.5m) 18s |
Table - best surf conditions forecast for Batu Karas over the next 16 days.
Short Range ForecastMostly dry. Warm (max 26°C on Sun morning, min 22°C on Sun night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 26°C on Wed morning, min 23°C on Wed night). Wind will be generally light. | ||||||||||||||||||||
Sunday 20 | Monday 21 | Tuesday 22 | Wednesday 23 | Thursday 24 | Friday 25 | Saturday 26 | |||||||||||||||
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 | SW 16 | SW 15 | SW 14 | SW 14 | SSW 13 | SSW 18 | SSW 18 | SSW 16 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 13 | SSW 14 | SSW 13 | SSW 13 | SSW 13 | SSW 21 | SSW 19 | SSW 18 |
Wave Graph | |||||||||||||||||||||
2663 | 2352 | 1672 | 1170 | 907 | 659 | 623 | 1393 | 2314 | 2061 | 1693 | 1227 | 889 | 863 | 930 | 711 | 679 | 526 | 1081 | 2001 | 4200 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | on | cross | cross-off | cross-on | cross | cross-off | cross-on | cross | cross-off | on | cross | cross-off | on | cross | cross-off | on | cross-off | cross-off | cross |
High Tide | 1:04PM0.76m | 1:24AM1.17m | 3:58AM1.12m | 7:23PM0.95m | 5:47AM1.19m | 7:20PM1.09m | 6:39AM1.30m | 7:33PM1.24m | 7:17AM1.38m | 7:50PM1.39m | 7:51AM1.45m | 8:11PM1.53m | |||||||||
Low Tide | 5:06PM0.69m | 11:09AM0.63m | 12:22PM0.54m | 11:37PM0.84m | 12:52PM0.46m | 00:37AM0.71m | 1:15PM0.39m | 1:15AM0.56m | 1:37PM0.33m | 1:48AM0.40m | 1:59PM0.28m | 2:20AM0.26m | |||||||||
5:37 | — | — | 5:35 | — | — | 5:35 | — | — | 5:35 | — | — | 5:33 | — | — | 5:33 | — | — | 5:33 | — | — | |
— | 5:42 | — | — | 5:42 | — | — | 5:42 | — | — | 5:40 | — | — | 5:40 | — | — | 5:40 | — | — | 5:40 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 3 |
Temp °C | 26 | 25 | 24 | 25 | 25 | 24 | 26 | 25 | 24 | 26 | 25 | 24 | 25 | 25 | 24 | 26 | 26 | 24 | 26 | 26 | 25 |
Feels °C | 27 | 25 | 27 | 26 | 26 | 28 | 27 | 26 | 28 | 27 | 25 | 28 | 26 | 26 | 28 | 28 | 28 | 28 | 28 | 27 | 28 |
Swell 1 Height (m) Direction Period (s) | SSW 16 | SW 16 | SW 15 | SW 14 | SW 14 | SSW 13 | SSW 13 | SSW 18 | SSW 16 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 13 | SSW 14 | SSW 13 | SSW 13 | SSW 13 | SSW 14 | SSW 19 | SSW 18 |
2663 | 2352 | 1672 | 1170 | 907 | 659 | 504 | 1393 | 2314 | 2061 | 1693 | 1227 | 889 | 863 | 930 | 711 | 679 | 526 | 845 | 2001 | 4200 | |
Swell 2 Height (m) Direction Period (s) | SE 6 | — | S 6 | — | SW 20 | SE 6 | SSW 18 | SSW 13 | ESE 6 | S 8 | — | S 8 | — | — | — | SSW 18 | SSW 25 | SSW 16 | SSW 21 | SSW 14 | — |
47 | — | 7 | — | 15 | 54 | 623 | 402 | 35 | 21 | — | 28 | — | — | — | 31 | 63 | 223 | 1081 | 1016 | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | W 16 | SSW 19 | S 11 | S 11 | S 8 | — | — | — | — | — | — | S 26 | — | SSW 23 | ESE 5 | — | — |
— | — | — | — | 5 | 139 | 22 | 36 | 57 | — | — | — | — | — | — | 13 | — | 213 | 11 | — | — | |
Wind waves Height (m) Direction Period (s) | — | SE 6 | SE 6 | SE 6 | SE 6 | — | ESE 6 | SE 6 | — | ESE 6 | SE 6 | SE 6 | SE 6 | SE 6 | ESE 6 | ESE 6 | ESE 6 | — | — | — | — |
— | 39 | 47 | 83 | 62 | — | 44 | 39 | — | 36 | 40 | 37 | 37 | 37 | 28 | 21 | 20 | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 519 | 519 | 6 | 481 | 519 | 6 | 519 | 430 | 6 | 519 | 734 | 6 | 230 | 230 | 6 | 236 | 230 | 0 | 519 | 519 | 8 |
Best forecast wave conditions in Central Java | |||||||||||||||||||||
Best forecast wave conditions in Indonesia | |||||||||||||||||||||
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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.










