Surf Forecasts:
Gerpuk Bay - Inside Gerpuk surf forecast from 27 Aug 2026:
- Best quality surf: Saturday 29 Aug, 5AM (local time) - 7ft (2.2m), 16s period, SW swell with glassy winds.
- Most powerful swell: Friday 28 Aug, 8AM (local time) - 8ft (2.5m), 17s period, SW swell with 4,293 kJ wave energy.
- Next surfable swell (1★+): Saturday 29 Aug, 5AM (local time) - 7ft (2.2m), 16s period with SW swell.
Best Forecast Surf Conditions for Gerpuk Bay - Inside Gerpuk this week:
The surf forecast for Gerpuk Bay - Inside Gerpuk over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Aug 29) at 5AM. The primary swell is predicted to be 2.2m and 16s period with a secondary swell of 0.6m and 5s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Gerpuk Bay - Inside Gerpuk in the next 16 days are 2.5m 17s and forecast to arrive on Friday (Aug 28) at 8AM. 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+) | 5AM (Sat 29th Aug) | 7ft (2.2m) 16s |
| Best Surf | 5AM (Sat 29th Aug) | 7ft (2.2m) 16s |
| Most Powerful | 8AM (Fri 28th Aug) | 8ft (2.5m) 17s |
Table - best surf conditions forecast for Gerpuk Bay - Inside Gerpuk over the next 16 days.
The Lowdown
Alright, Rusty here again, but I’ll use the old measurements this time. It’s looking like a long, slow period for waves, so don’t rush to wax up.
Right now and for the next week, it’s a bust. The wind is howling from the SE and ruining everything. The first few days show a solid 8ft swell from the SW with a long 16-second period, but the cross-onshore breeze has it all torn up and choppy. The combined energy is strong, around 3974, but it’s not worth paddling out for. This mess continues through the weekend and into the start of September. By Sunday the 30th, the wind gets even stronger, making conditions poor. This run of bad conditions holds through to the 7th of September.
The one bright spot in this 16-day forecast is on Friday the 11th of September. We’ll see another pulse of 8ft swell from the SSW with a 16-second period. The combined energy will be pumping at around 3938. It’s still not perfect, with moderate cross-onshore winds, but it’s the best we’ll see. This is a long-range call, so keep an eye on it. Then on Saturday the 12th, the swell jumps to 10ft from the SSW with a very long 18-second period. That’s a big, powerful groundswell, and it’s only for experts. With the cross-onshore wind, it’ll be a real handful.
The water temperature is about average for this time of year, nothing unusual. Just a lot of waiting for the wind to swing around.
Hang in there. It’s a rough spell, but forecasts can change.
Rusty.
Short Range ForecastMostly dry. Warm (max 27°C on Sun afternoon, min 23°C on Thu night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 27°C on Mon morning, min 24°C on Sun night). Winds increasing (light winds from the ENE on Sun night, fresh winds from the SE by Mon afternoon). | ||||||||||||||||||
Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | ||||||||||||||
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 18 | SW 16 | SW 16 | SW 16 | SW 15 | SW 14 | SSW 13 | SSW 13 | SW 13 | SW 19 | SW 18 | SW 18 | SW 18 | SW 18 | SW 17 | SW 17 | SW 17 | SW 16 | SW 16 |
Wave Graph  | |||||||||||||||||||
 kJ | 4288 | 3950 | 3343 | 2726 | 1885 | 911 | 669 | 808 | 700 | 846 | 1202 | 1777 | 2485 | 2813 | 2684 | 2781 | 2442 | 2193 | 1664 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | cross-on | on | cross-on | cross-on | on | on | cross-on | on | on | cross-on | on | on | cross-on | on | on | cross-on | on |
High Tide | 10:32PM2.26m | 10:19AM2.57m | 10:53PM2.44m | 10:49AM2.65m | 11:15PM2.61m | 11:18AM2.67m | 11:38PM2.73m | 11:47AM2.62m | 00:03AM2.81m | 12:17PM2.51m | 00:29AM2.82m | 12:48PM2.34m | 00:57AM2.78m | ||||||
Low Tide | 4:16AM0.71m | 4:41PM0.25m | 4:46AM0.53m | 5:04PM0.20m | 5:15AM0.37m | 5:27PM0.19m | 5:45AM0.27m | 5:51PM0.23m | 6:16AM0.22m | 6:15PM0.30m | 6:49AM0.24m | 6:40PM0.42m | |||||||
 |  | | | | | | | | | | | | | | | | | | |
 | — | 6:18 | — | — | 6:18 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — |
 | 6:13 | — | 6:13 | — | — | 6:13 | — | — | 6:12 | — | — | 6:12 | — | — | 6:12 | — | — | 6:12 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 24 | 25 | 26 | 25 | 26 | 26 | 25 | 26 | 27 | 25 | 27 | 26 | 25 | 27 | 26 | 25 | 27 | 27 | 25 |
Feels °C | 24 | 26 | 26 | 26 | 27 | 26 | 26 | 26 | 26 | 27 | 26 | 24 | 25 | 25 | 24 | 25 | 26 | 26 | 25 |
Swell 1 Height (m) Direction Period (s) | SSW 18 | SW 16 | SW 16 | SW 16 | SW 15 | SW 14 | SSW 13 | SSW 13 | SW 13 | SSW 12 | SW 18 | SW 18 | SW 18 | SW 18 | SW 17 | SW 17 | SW 17 | SW 16 | SW 16 |
| kJ | 4288 | 3950 | 3343 | 2726 | 1885 | 911 | 669 | 808 | 700 | 504 | 1202 | 1777 | 2485 | 2813 | 2684 | 2781 | 2442 | 2193 | 1664 |
Swell 2 Height (m) Direction Period (s) | — | SE 6 | SE 6 | SE 5 | SE 6 | SSW 15 | SW 15 | SW 21 | SW 21 | SW 19 | SW 12 | SSW 11 | SE 5 | W 14 | — | SE 6 | — | — | — |
| kJ | — | 24 | 40 | 18 | 19 | 405 | 301 | 224 | 361 | 846 | 330 | 197 | 28 | 4 | — | 52 | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | SSW 6 | SSW 6 | SSW 24 | SW 21 | — | SE 5 | — | SW 12 | SSW 11 | — | — | — | — | — | — |
| kJ | — | — | — | — | 8 | 7 | 54 | 224 | — | 17 | — | 51 | 133 | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SE 5 | — | SE 6 | — | — | SE 6 | SE 5 | SE 5 | SE 5 | ESE 5 | SE 5 | SE 5 | — | SE 6 | SE 6 | SE 6 | SE 6 | SE 5 | SE 5 |
| kJ | 55 | — | 38 | — | — | 40 | 25 | 28 | 65 | 34 | 25 | 68 | — | 68 | 77 | 92 | 74 | 93 | 73 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 11 | 11 | 42 | 11 | 11 | 42 | 11 | 42 | 42 | 5 | 43 | 42 | 11 | 43 | 42 | 11 | 43 | 43 | 12 |
Best forecast wave conditions in South Coast of Lombok | |||||||||||||||||||
Best forecast wave conditions in Indonesia | |||||||||||||||||||
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Information about the Gerpuk Bay - Inside Gerpuk Surf forecast
The above surf forecast table for Gerpuk Bay - Inside Gerpuk provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Gerpuk Bay - Inside Gerpuk can be found by selecting the local surf guide option on the grey menu. Our Gerpuk Bay - Inside Gerpuk 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 (Gerpuk Bay - Inside Gerpuk) 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 Gerpuk Bay - Inside Gerpuk 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.
Grupuk is 26 km (16 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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