Surf Forecasts:
Dunes surf forecast from 18 Aug 2026:
- Best quality surf: Tuesday 18 Aug, 5PM (local time) - 7ft (2.1m), 17s period, WSW swell with onshore winds.
- Most powerful swell: Tuesday 18 Aug, 8PM (local time) - 7.5ft (2.3m), 17s period, WSW swell with 2,987 kJ wave energy.
- Next surfable swell (1★+): Tuesday 18 Aug, 5PM (local time) - 7ft (2.1m), 17s period with WSW swell.
Best Forecast Surf Conditions for Dunes this week:
The surf forecast for Dunes over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Aug 18) at 5PM. The primary swell is predicted to be 2.1m and 17s period. The wind is predicted to be onshore as the swell arrives.
The most powerful waves expected at Dunes in the next 16 days are 2.3m 17s and forecast to arrive on Tuesday (Aug 18) at 8PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 5s period and expected on Monday (Aug 24) at 11PM.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5PM (Tue 18th Aug) | 7ft (2.1m) 17s |
| Best Surf | 5PM (Tue 18th Aug) | 7ft (2.1m) 17s |
| Most Powerful | 8PM (Tue 18th Aug) | 7.5ft (2.3m) 17s |
Table - best surf conditions forecast for Dunes over the next 16 days.
The Lowdown
Alright, let’s get into it. I’m lookin’ at the charts for our stretch of coast, and it’s a bit of a mixed bag over the next two and a half weeks. The first real action pops up Tuesday the 18th, and we’ve got some serious muscle in the water from a long-period groundswell.
Tuesday the 18th starts off with a bang. The morning at Dunes is pumping, with a solid 5 ft swell out of the SW, a very long 17-second period, and a light offshore ESE breeze. The wave energy is strong, sitting at 1471. The water’s 74°, which is about what you’d expect for this time of year. This is excellent for experienced surfers. That afternoon, the swell jumps to 7 ft from the WSW, and the energy roars up to 2581. Problem is, the forecast says it might actually be a bit too big for this setup. The wind shifts onshore from the NNW, making it tricky.
Wednesday the 19th keeps the big swell going. Morning sees that same 7 ft, 16-second swell with a light SE offshore, but again, the models are hinting it’s too hefty for good shape. The afternoon is the real gem: the swell drops back to 6 ft, still a long 16 seconds, and the wind goes glassy from the NW. That’s pure gold – clean, glassy faces for the experienced crew. The energy is 1629.
By Thursday the 20th, the swell eases to a more manageable 5 ft out of the SW, with a 15-second period. The morning has a SE breeze, clean. Energy is moderate to strong at 930. It’s a very good session for most surfers. The afternoon gets a bit messy with a cross-offshore S wind and a bump up to 5 ft, but it’s still ridable.
Friday the 21st and Saturday the 22nd see the swell settling down. Friday morning has that 5 ft SW swell, but a strong 12 mph SSE cross-off wind keeps it clean. Energy drops to 894. Saturday morning is the better call – a clean, clear morning with 4 ft swell and a light S breeze. Good, but the afternoon gets blown out.
Sunday the 23rd through to Tuesday the 25th is a real quiet stretch. The swell drops to around 3 ft, and the wind picks up. Sunday morning is blown out with a 19 mph S breeze, energy down to 492. Monday afternoon sees a little spike to 5 ft, but it’s messy with a cross wind. Tuesday is a write-off – strong winds and weak energy. Not much to get excited about.
We get a breather on Wednesday the 26th, with a tiny 3 ft swell but clean offshores. Still, it’s marginal.
Thursday the 27th afternoon brings a little pulse back, with 5 ft from the SW and a 14-second period. Energy climbs back over 1000 to 1023. Clean with a SE wind, so it’s a better option for a sneaky afternoon session.
Friday the 28th morning is clean with a fresh offshore SE breeze, but the swell is only 4 ft. It’s a paddler’s workout for small waves.
Then we get a real treat for the end of the window. Sunday the 30th morning has a clean 4 ft swell from the WSW, 16 seconds, with a moderate offshore SE wind. Energy is 864. Very good, solid, clean.
But the standout is Monday the 31st of August. The morning brings a solid 6 ft of WSW groundswell, 16-second period, with a clean offshore SE breeze. Energy jumps to 1650. This is excellent, powerful, clean surf for experienced surfers. Later in the day it might get a bit jumbly, but that morning window is the best of the whole forecast. The wind and tide are favorable, and this is the one to circle.
Tuesday the 1st of September morning is still strong at 6 ft, 16 seconds, but a fresh cross-off ENE wind keeps it clean. It’s a good follow-up session.
Wednesday the 2nd of September brings another late spike, with 7 ft from the WSW, but the models say it might be too big for the break again. Still, a solid option for the barrel hunters, with clean offshore conditions.
Overall, it’s a run of two halves. The opening days have some real power, then a flat spell, then a strong finish at the end of August into September. The biggest shout-out goes to Monday the 31st of August morning at Dunes for the cleanest, most powerful session on offer.
Rusty.
Short Range ForecastMostly dry. Warm (max 24°C on Thu afternoon, min 20°C on Tue morning). Winds increasing (calm on Tue afternoon, fresh winds from the SSE by Thu night). | Days 4-6 Weather SummaryMostly dry. Warm (max 24°C on Fri afternoon, min 18°C on Sun morning). Winds increasing (light winds from the WSW on Sat afternoon, strong winds from the S by Sun night). | ||||||||||||||||||||
Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | |||||||||||||||
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 17 | WSW 17 | WSW 16 | WSW 16 | WSW 16 | WSW 15 | SW 15 | SW 16 | SW 16 | SW 16 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 | SW 16 | SW 15 | SW 14 | WSW 16 | SW 16 | WSW 14 |
Wave Graph | |||||||||||||||||||||
1467 | 2581 | 2781 | 2234 | 1629 | 1132 | 930 | 1144 | 1129 | 894 | 816 | 623 | 667 | 514 | 379 | 471 | 595 | 293 | 452 | 1101 | 545 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | on | cross | off | glassy | cross-off | off | cross-off | off | cross-off | cross | cross-off | cross-off | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross-off |
High Tide | 2:35PM1.61m | 2:45AM1.86m | 3:01PM1.45m | 3:09AM1.80m | 3:26PM1.30m | 3:33AM1.72m | 3:54PM1.15m | 4:02AM1.62m | 4:34PM1.01m | 4:44AM1.52m | 6:09AM1.41m | 11:42PM1.13m | |||||||||
Low Tide | 8:35AM0.34m | 8:24PM0.43m | 9:08AM0.43m | 8:40PM0.53m | 9:41AM0.53m | 8:52PM0.63m | 10:20AM0.65m | 9:01PM0.73m | 11:21AM0.75m | 9:00PM0.84m | 1:32PM0.79m | 3:31PM0.69m | 2:15AM1.11m | ||||||||
6:45 | — | — | 6:43 | — | — | 6:43 | — | — | 6:43 | — | — | 6:41 | — | — | 6:41 | — | — | 6:39 | — | — | |
— | 6:08 | — | — | 6:08 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:10 | — | — | 6:10 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 20 | 21 | 22 | 21 | 22 | 22 | 22 | 24 | 21 | 21 | 24 | 24 | 22 | 23 | 22 | 19 | 24 | 21 | 20 | 23 | 22 |
Feels °C | 17 | 22 | 22 | 19 | 22 | 23 | 20 | 22 | 17 | 18 | 23 | 22 | 21 | 23 | 18 | 13 | 19 | 15 | 16 | 21 | 17 |
Swell 1 Height (m) Direction Period (s) | SW 17 | WSW 17 | WSW 16 | WSW 16 | WSW 16 | WSW 15 | SW 15 | SW 16 | SW 16 | SW 16 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 | SW 16 | SW 15 | SW 14 | WSW 16 | SW 16 | WSW 14 |
1467 | 2581 | 2781 | 2234 | 1629 | 1132 | 930 | 1144 | 1129 | 894 | 816 | 623 | 667 | 514 | 379 | 471 | 595 | 293 | 452 | 1101 | 545 | |
Swell 2 Height (m) Direction Period (s) | N 5 | N 5 | N 6 | NE 6 | NE 6 | N 6 | N 6 | N 6 | N 8 | NNE 8 | NE 8 | NNE 7 | ENE 8 | SW 19 | SW 18 | SW 6 | SW 20 | WSW 18 | SW 13 | N 7 | N 7 |
1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 6 | 10 | 5 | 6 | 131 | 154 | 21 | 98 | 276 | 208 | 1 | 1 | |
Swell 3 Height (m) Direction Period (s) | W 14 | — | — | — | N 6 | — | — | — | — | — | NW 11 | NW 11 | NW 11 | NNE 7 | NE 7 | NE 7 | ENE 7 | NE 7 | SW 7 | W 16 | — |
4 | — | — | — | 1 | — | — | — | — | — | 5 | 5 | 4 | 5 | 7 | 2 | 5 | 2 | 31 | 5 | — | |
Wind waves Height (m) Direction Period (s) | SSE 3 | — | — | SSE 3 | — | — | SSE 3 | SSE 4 | SE 3 | SE 3 | SSW 3 | S 3 | — | SW 4 | SSW 5 | SSE 4 | S 4 | SSW 4 | SE 4 | SSW 3 | SSW 5 |
2 | — | — | 2 | — | — | 3 | 34 | 5 | 4 | 3 | 3 | — | 12 | 69 | 22 | 7 | 25 | 12 | 4 | 78 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 1446 | 660 | 15 | 0 | 0 | 0 | 251 | 15 | 15 | 1288 | 227 | 0 | 1446 | 1288 | 1143 | 1314 | 660 | 15 | 777 | 660 |
Best forecast wave conditions in North West WA | |||||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||||
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Information about the Dunes Surf forecast
The above surf forecast table for Dunes provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Dunes can be found by selecting the local surf guide option on the grey menu. Our Dunes 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 (Dunes) 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 Dunes 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.
Are you planning a holiday in North West WA? If you are looking for accommodation near Dunes, camping, hotels and holiday cottages in North West WA, consider staying in Exmouth which is 15 km (9 miles) away.











