Surf Forecasts:
Ampang surf forecast from 20 Aug 2026:
- Most powerful swell: Friday 21 Aug, 5PM (local time) - 8ft (2.4m), 17s period, SSW swell with 3,339 kJ wave energy.
Best Forecast Surf Conditions for Ampang this week:
The most powerful waves expected at Ampang in the next 16 days are 2.4m 17s and forecast to arrive on Friday (Aug 21) at 5PM. Winds are predicted to be cross-onshore at the time the swell arrives.
| Wave Type | Time (WITA) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 5PM (Fri 21st Aug) | 8ft (2.4m) 17s |
Table - best surf conditions forecast for Ampang over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's have a look at what's on offer for the region.
Honestly, it's a bit of a tough stretch. We've got a whole lot of swell energy, but the wind just won't play ball. The setup is almost always cross-onshore, and that's going to keep things messy. For the first week and a half, from the 20th of August right through, the score is pretty much zero across the board. The swell is solid, between 6.2ft and 8.2ft, but it's blown out and choppy. There's a massive amount of energy in the water, with combined energy values consistently in the thousands – like 3455 on Thursday afternoon – but it's not doing us any favours with that wind. You'll be looking at a long, frustrating run of poor conditions.
Now, the first real glimmer of hope comes on the 27th of August, Thursday afternoon. We get a bit of a shift. The swell drops to 4.9ft, but the period jumps to a very long 19 seconds, a proper groundswell from the SW. The combined energy is still strong at 2241, and for the first time, the wind goes cross-shore instead of cross-on. It's still a little choppy, but it's a marginal improvement. The pick of the whole sixteen-day window, however, is shaping up to be the 28th of August, Friday morning. The swell is up to 8.2ft from the SSW, with a solid 17-second period, and there's a massive 4363 combined energy. The wind is a gentle cross-onshore breeze, which is the best we'll see. It'll still be fairly choppy, but it's the closest we get to something rideable. For a spot like Ampang, which is a reef break that's inconsistent and can be a bit fickle, getting this much energy is noteworthy. The water temp is sitting at 79.2°, which is pretty normal for this time of year.
Beyond that, the 2nd of September shows a bit of promise with the wind easing off, but the swell is still cross-onshore and choppy. It’s a long wait for a short window of 'maybe' surf. A spot like this, with all that wind and swell, might actually be more interesting for a kite surfer than a paddle surfer for most of this period.
Short Range ForecastMostly dry. Warm (max 26°C on Thu afternoon, min 23°C on Thu night). Winds increasing (light winds from the ENE on Fri morning, fresh winds from the SE by Sat afternoon). | Days 5-7 Weather SummaryMostly dry. Warm (max 26°C on Sun afternoon, min 23°C on Tue night). Mainly fresh winds. | |||||||||||||||||||
Thu 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | ||||||||||||||
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 16 | SW 16 | SW 15 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 15 | SSW 14 | SSW 16 | SSW 16 | SSW 14 | SSW 15 | SW 16 | SSW 15 | SSW 14 | SW 14 | SSW 13 |
Wave Graph  | ||||||||||||||||||||
 kJ | 3334 | 2513 | 1836 | 3339 | 2892 | 2503 | 2151 | 1989 | 1937 | 1488 | 1389 | 2023 | 1699 | 1126 | 1222 | 1591 | 1314 | 1126 | 920 | 342 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | cross-on | cross-on | on | cross-on | cross-on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross-on |
High Tide | 2:33PM1.37m | 2:45AM1.94m | 3:21PM1.17m | 3:31AM1.79m | 5:04AM1.67m | 7:12AM1.70m | 10:25PM1.41m | 8:26AM1.83m | 10:22PM1.54m | 9:12AM1.98m | 10:33PM1.70m | |||||||||
Low Tide | 7:52PM0.82m | 10:02AM0.83m | 7:51PM0.96m | 12:28PM0.89m | 2:38PM0.76m | 3:19PM0.60m | 2:40AM1.20m | 3:48PM0.45m | 3:24AM1.04m | 4:13PM0.33m | 3:58AM0.87m | |||||||||
 |  | | | | | | | | | |  | | | | | | | | | |
 | — | — | 6:22 | — | — | 6:20 | — | — | 6:20 | — | — | 6:20 | — | — | 6:20 | — | — | 6:18 | — | — |
 | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 24 | 25 | 26 | 24 | 26 | 26 | 24 | 26 | 26 | 24 | 26 | 26 | 25 | 26 | 25 | 24 | 26 | 26 | 24 |
Feels °C | 24 | 25 | 25 | 24 | 25 | 25 | 24 | 25 | 25 | 24 | 24 | 26 | 25 | 25 | 24 | 23 | 24 | 26 | 25 | 24 |
Swell 1 Height (m) Direction Period (s) | SW 16 | SW 16 | SW 15 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 15 | SSW 14 | SSW 16 | SSW 16 | SSW 14 | SSW 15 | SW 16 | SSW 15 | SSW 14 | SW 14 | SSW 13 |
| kJ | 3334 | 2513 | 1836 | 3339 | 2892 | 2503 | 2151 | 1989 | 1937 | 1488 | 1389 | 2023 | 1699 | 1126 | 1222 | 1591 | 1314 | 1126 | 920 | 342 |
Swell 2 Height (m) Direction Period (s) | SE 6 | SE 6 | SSW 18 | SE 6 | SE 6 | SE 7 | S 26 | SSW 24 | SSE 5 | SSW 19 | SSW 18 | SE 6 | SW 20 | SW 18 | SSW 6 | SSW 6 | — | SE 5 | — | SW 13 |
| kJ | 45 | 45 | 644 | 45 | 62 | 43 | 13 | 54 | 19 | 1147 | 1106 | 32 | 134 | 199 | 4 | 4 | — | 31 | — | 286 |
Swell 3 Height (m) Direction Period (s) | — | — | SE 6 | — | — | — | S 26 | SSW 23 | — | — | — | — | — | — | — | — | — | — | — | SW 16 |
| kJ | — | — | 60 | — | — | — | 13 | 54 | — | — | — | — | — | — | — | — | — | — | — | 211 |
Wind waves Height (m) Direction Period (s) | SE 6 | SE 6 | ESE 7 | SE 6 | ESE 6 | SE 7 | SE 6 | SE 5 | — | SE 5 | SE 5 | — | SE 6 | SE 5 | SE 6 | SE 6 | SE 5 | ESE 5 | SE 5 | SE 5 |
| kJ | 76 | 74 | 150 | 81 | 124 | 75 | 65 | 32 | — | 73 | 29 | — | 76 | 60 | 87 | 79 | 42 | 54 | 35 | 26 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 37 | 6 | 36 | 37 | 6 | 37 | 37 | 6 | 37 | 37 | 7 | 37 | 37 | 26 | 37 | 37 | 6 | 37 | 26 | 6 |
Best forecast wave conditions in South Coast of Lombok | ||||||||||||||||||||
Best forecast wave conditions in Indonesia | ||||||||||||||||||||
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Information about the Ampang Surf forecast
The above surf forecast table for Ampang provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Ampang can be found by selecting the local surf guide option on the grey menu. Our Ampang 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 (Ampang) 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 Ampang 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.
Ampang is 27 km (17 miles) from the city of Praya. If you plan a holiday in South Coast of Lombok, look for hotels and other accommodation in Praya. Praya has rooms for a wide range of budgets as well as car hire and transport links.
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