Surf Forecasts:
Mawi surf forecast from 20 Aug 2026:
- Best quality surf: Friday 21 Aug, 11PM (local time) - 8ft (2.5m), 16s period, SSW swell with offshore winds.
- Most powerful swell: Friday 28 Aug, 2AM (local time) - 8ft (2.5m), 17s period, SSW swell with 3,621 kJ wave energy.
- Next surfable swell (1★+): Friday 21 Aug, 5AM (local time) - 7.5ft (2.3m), 16s period with SW swell.
Best Forecast Surf Conditions for Mawi this week:
The surf forecast for Mawi over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Aug 21) at 5AM. The primary swell is predicted to be 2.3m and 16s period with a secondary swell of 0.9m and 6s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Mawi in the next 16 days are 2.5m 17s and forecast to arrive on Friday (Aug 28) at 2AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 6s period and expected on Saturday (Aug 22) at 2AM.
| Wave Type | Time (WITA) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Fri 21st Aug) | 7.5ft (2.3m) 16s |
| Best Surf | 11PM (Fri 21st Aug) | 8ft (2.5m) 16s |
| Most Powerful | 2AM (Fri 28th Aug) | 8ft (2.5m) 17s |
Table - best surf conditions forecast for Mawi over the next 16 days.
The Lowdown
G’day, it’s Rusty here. Let’s get straight into it. The next few weeks at Mawi are looking like a proper run of solid, clean groundswell, but it’s not all going to be perfect. We’ve got a bit of a slow start, some average middle days, and then a couple of standout pulses that are going to have the crew frothing. The water temp is sitting pretty average for this time of year, so no surprises there – just your usual tropical warmth.
We kick things off on Friday, August 21st. The swell is already up at a solid 6.9ft coming from the southwest with a 15-second period. The wind is a cross-off from the southeast at 9 mph, which is keeping things glassy and clean. The combined energy is sitting at 2781, so there’s some proper grunt in the water. This is going to be a day for experienced surfers – the reef is handling it well, but it’s not messing around. The swell bumps slightly to 7.9ft in the afternoon with a longer 17-second period and energy jumps to 3436. This is a solid start, but the tide might be doing funky things later in the day, so get on it early.
Saturday the 22nd is a step-down. Still 7.5ft in the morning, but the period drops a touch to 16 seconds and the energy is down to 2762. The wind stays clean and cross-off, but the forecast is a bit “marginal” – not bad, just not firing. It’s still good, clean reef surf, but the magic from Friday is gone. Sunday the 23rd is more of the same, 6.9ft and 6.6ft with 15-second periods, and the energy is around the 2200-2700 mark. It’s surfable, clean, and fun for the advanced crew, but nobody’s calling in sick for it.
Monday the 24th and Tuesday the 25th are where it gets a bit softer. Swell drops to 6.2ft and then 5.6ft. The period is still decent at 15-16 seconds, but the energy drops to the 1300-1800 range. The wind is still offshore and clean, which saves it, but it’s losing some of its punch. Wednesday the 26th is similar – 5.6ft, 14-second period, energy down around 1100. It’s still a clean reef wave, but you’re working harder for less.
Thursday the 27th is a real drop-off. The swell backs right off to 3.6ft. The morning is clean but weak, and the afternoon brings a longer 20-second period but that energy only reads 2000. It’s small, but that long period might make it a bit more lined-up and soft. Not a day to be out there unless you’re keen on a longboard.
Now, here’s where things get interesting. Friday the 28th has a proper spike. We’re looking at 9.8ft in the morning with a 17-second period, and the energy reading jumps to 4486. This is a solid, powerful groundswell. The wind is light and cross-off from the SSE at 9 mph, which is going to keep it clean. This is a standout morning – no doubt about it. It’s big, it’s dangerous, and it’s only for experts. The afternoon eases off to 8.2ft but it’s still plenty solid.
Saturday the 29th and Sunday the 30th are consistent but a step down, 7.2ft and 6.9ft down to 5.9ft. The energy drops back to the 1100-2000 range. It’s still clean the whole time, but the initial power is gone. Monday the 31st is the quietest day of the run, with 4.3ft in the morning and a tiny 3.3ft in the afternoon. The period is still okay, but there’s just not much push. A true lull.
Then we’re looking at the long-range prize. On Tuesday, September 1st, we see the swell start building again, 7.5ft to 7.9ft with 18-19 second periods and energy around 3500-3600. There’s a risk of a thunderstorm in the afternoon, so morning looks best.
But the big one is coming. Wednesday the 2nd of September is looking seriously good. Light SE winds at just 6 mph, 7.5ft to 7.9ft of SW swell with a 16-second period, and the energy is around 2750. The conditions are described as excellent. This is a clean, powerful day at Mawi. Thursday the 3rd
Short Range ForecastMostly dry. Warm (max 26°C on Fri afternoon, min 23°C on Thu night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 27°C on Wed afternoon, min 24°C on Sun night). Mainly fresh winds. | ||||||||||||||||||
Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | ||||||||||||||
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 15 | SSW 17 | SSW 16 | SSW 16 | SW 16 | SSW 15 | SSW 15 | SSW 15 | SSW 14 | SSW 16 | SSW 16 | SSW 14 | SSW 15 | SW 16 | SW 15 | SSW 14 | SSW 14 | SSW 14 |
Wave Graph | |||||||||||||||||||
2692 | 1951 | 3339 | 2892 | 2663 | 2262 | 1989 | 1846 | 1626 | 1468 | 2023 | 1699 | 921 | 1288 | 1591 | 1358 | 1095 | 1065 | 379 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | cross-off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 2:28AM2.25m | 2:47PM1.52m | 3:07AM2.05m | 4:01PM1.30m | 4:26AM1.87m | 7:11AM1.87m | 9:42PM1.62m | 8:29AM2.05m | 9:55PM1.83m | 9:13AM2.24m | 10:12PM2.03m | ||||||||
Low Tide | 9:18AM0.91m | 8:09PM1.03m | 10:43AM1.08m | 8:03PM1.22m | 1:57PM1.03m | 2:59PM0.83m | 2:22AM1.32m | 3:30PM0.64m | 3:10AM1.12m | 3:54PM0.48m | 3:45AM0.91m | ||||||||
— | 6:22 | — | — | 6:22 | — | — | 6:22 | — | — | 6:20 | — | — | 6:20 | — | — | 6:20 | — | — | |
6:14 | — | 6:14 | — | — | 6:14 | — | — | 6:14 | — | — | 6:14 | — | — | 6:14 | — | — | 6:14 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 24 | 25 | 26 | 24 | 26 | 26 | 24 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 27 | 25 |
Feels °C | 24 | 26 | 25 | 23 | 25 | 25 | 24 | 25 | 24 | 25 | 25 | 25 | 25 | 24 | 24 | 25 | 25 | 26 | 25 |
Swell 1 Height (m) Direction Period (s) | SW 16 | SW 15 | SSW 17 | SSW 16 | SSW 16 | SW 16 | SSW 15 | SSW 15 | SSW 15 | SSW 14 | SSW 16 | SSW 16 | SSW 14 | SSW 15 | SW 16 | SW 15 | SSW 14 | SSW 14 | SSW 14 |
2692 | 1951 | 3339 | 2892 | 2663 | 2262 | 1989 | 1846 | 1626 | 1468 | 2023 | 1699 | 921 | 1288 | 1591 | 1358 | 1095 | 1065 | 379 | |
Swell 2 Height (m) Direction Period (s) | — | SSW 18 | — | SE 6 | — | S 26 | SSW 24 | SSW 20 | SSW 19 | SSW 18 | — | SW 20 | SW 18 | — | — | — | — | SSW 8 | SW 13 |
— | 770 | — | 85 | — | 13 | 54 | 349 | 1147 | 1106 | — | 134 | 510 | — | — | — | — | 37 | 286 | |
Swell 3 Height (m) Direction Period (s) | — | SE 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 16 |
— | 60 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 274 | |
Wind waves Height (m) Direction Period (s) | SE 6 | ESE 7 | SE 7 | ESE 6 | SE 7 | SE 6 | SE 5 | SE 6 | SE 5 | SE 5 | SE 6 | SE 6 | SE 5 | SE 6 | SE 6 | SE 5 | SE 5 | SE 5 | SE 5 |
91 | 150 | 97 | 145 | 99 | 96 | 40 | 44 | 80 | 52 | 69 | 111 | 68 | 111 | 115 | 50 | 37 | 38 | 22 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 0 | 34 | 0 | 34 | 34 | 32 | 60 | 34 | 34 | 34 | 34 | 34 | 60 | 34 | 32 | 34 | 34 | 32 |
Best forecast wave conditions in South Coast of Lombok | |||||||||||||||||||
Best forecast wave conditions in Indonesia | |||||||||||||||||||
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Information about the Mawi Surf forecast
The above surf forecast table for Mawi provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Mawi can be found by selecting the local surf guide option on the grey menu. Our Mawi 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 (Mawi) 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 Mawi 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.
Mawi is 25 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.











