Dunes Surf Break

Lat Long: 21.80° S 114.14° E

Dunes Surf Forecast and Surf Report

Issued: 7 pm 17 Aug 2026 (local time)

Forecast update in  hr  min

Today's Dunes sea temperature is
23.5° C
0.7° 

Dunes surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Dunes surf forecast from 17 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, 8AM (local time) - 5ft (1.5m), 17s period with SW 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 8AM. The primary swell is predicted to be 1.5m and 17s period. The wind is predicted to be offshore 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 1.1m 5s period and expected on Monday (Aug 24) at 11PM.

Wave TypeTime (AWST) & Date Wave Height & Period
Next good surf (1 star+) 8AM (Tue 18th Aug)5ft (1.5m) 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 folks, Rusty here. Let’s talk about the only game in town for the next couple of weeks.

The bulk of the action is all at Dunes, a reef setup. The first few days are a bit of a slow burner, but we’ve got some real windows of quality coming through. The standout sessions are the Tuesday morning, 18th of August, and the Thursday morning, 20th of August. Those are the ones to circle.

The water is sitting at about 74°, which is pretty much what you’d expect for this time of year, nothing weird going on there.

We start off on Monday afternoon, the 17th. It’s a bit of a write-off with a 5ft SW swell, but a cross-shore wind from the SW and moderate energy (938) has things messy. Not worth paddling out for.

Come Tuesday morning, the 18th, and we’re in business. The swell has bumped up to a clean 5ft from the SW, with a solid 17-second period. That’s proper groundswell. The wind is light offshore from the SE, so it’s going to be glassy. The energy is moderate (1471). This is easily the best session on offer. That reef is going to be firing with those long-period lines.

By Tuesday afternoon, the swell jumps to 7ft from the WSW, but the wind swings onshore from the WNW. The energy is strong (2581), but it’s too big for the break and the wind is rubbish. Move on.

Wednesday morning, the 19th, still has that 7ft WSW swell with clean cross-offshore wind from the E. The energy is strong (2128), but again, it’s pushing past the 7ft mark. For experienced surfers only at this size. The afternoon sees the swell drop to 6ft, but the wind goes cross-on and light. Not great.

Thursday morning, the 20th, is the second standout. A solid 5ft SW swell, with a 15-second period, and a clean offshore wind from the SE at 16 mph. Moderate energy (1161), but the conditions are going to be perfect, clean waves. The wind is a bit breezy, but it’s offshore, so it’s a goer.

Thursday afternoon has a 5ft SW swell, but the wind is cross-offshore and the energy is moderate (1271). It’s okay, but not as good as the morning.

Friday morning, the 21st, has a smaller 5ft SW swell with a gentle offshore from the SE. Energy is moderate (976). It’s surfable but not a standout. The afternoon turns to junk with a cross-on wind.

From Saturday, the 22nd, through to Tuesday, the 25th, the swell drops to 3ft to 4ft. The wind is mostly cross-offshore or offshore, but the energy is weak to moderate (421 to 832). The waves are small and weak. It’s a flat spell, about 3 to 4 days of nothing exciting.

Wednesday morning, the 26th, brings a nice pulse back. A 5ft SW swell with a 17-second period and a moderate offshore wind from the SSE. Energy is moderate (1098). It’s clean and the period is long, so the reef will be working nicely. The afternoon gets messy with a cross-shore wind.

Thursday, the 27th, is small and average. Friday morning, the 28th, is small but clean with a 4ft SW swell and light cross-offshore wind. Not a standout.

Saturday morning, the 29th, is worth a mention. A 5ft WSW swell, with a 16-second period, and a light cross-offshore wind from the ENE. Energy is moderate (1230). The afternoon gets a cross-on wind, so it’s a morning session.

Now, here’s a real interesting one. Sunday morning, the 30th of August. The swell is only 3ft from the WSW, but the period is a massive 21 seconds. That’s some very long-period groundswell. The energy is moderate (1430). The wind is light and cross-offshore from the S. It’s clean, but that period is so long it might be a bit too straight for the beach break if it were a beach, but Dunes is a reef, so it should handle it well. The waves will be fat and walled-up, but still clean. Worth a look if you’ve got a log.

The end of the window, Monday the 31st of August and Tuesday the 1st of September, sees a return of bigger swell. 6ft to 7ft WSW swell, with strong energy (2216, 2316). But the wind is strong and cross-offshore or fresh offshore. It’s going to be big and bumpy, only for the experts.

Overall, the best bets are the Tuesday morning, 18th of August, and the Thursday morning, 20th of August. The rest is a mix of small, clean sessions or bigger, messier conditions. Keep an eye on that Sunday the 30th for something weird and clean.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 25°C on Thu afternoon, min 20°C on Mon night). Winds increasing (calm on Tue afternoon, fresh winds from the SE by Thu morning).

Days 5-7 Weather Summary

Mostly dry. Warm (max 24°C on Thu night, min 20°C on Thu night). Mainly fresh winds.

Tuesday
18
Wednesday
19
Thursday
20
Friday
21
Saturday
22
Sunday
23
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
3
4
!
!
!
3
3
4
4
2
3
2
2
3
0
1
1
1
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.4
SW
16
1.6
SW
17
2.1
WSW
17
2.3
WSW
16
2.1
WSW
16
2
WSW
16
1.6
WSW
15
1.3
WSW
14
1.6
SW
16
1.5
SW
16
1.4
SW
16
1.4
SW
15
1.2
SW
15
1.1
SW
14
1.1
SW
14
1
SW
14
1
SW
14
1.1
SW
16
1.1
SW
16
Wave Graph
Metric surfscale
Energy kJ
1031
1467
2581
2781
2234
1880
1132
682
1367
1129
894
816
623
521
500
357
373
532
565
Wind (km/h)
15
S
15
SE
5
NNW
10
SSW
15
ESE
10
NW
20
SSE
25
SE
15
SSE
30
SSE
15
SSE
15
SW
20
SSW
5
SE
20
W
25
SSW
20
SSE
25
WSW
35
S
Wind State
cross-off
off
on
cross-off
off
on
cross-off
off
cross-off
cross-off
off
cross
cross-off
off
cross-on
cross-off
cross-off
cross
cross-off
High Tide
2:20AM1.90m
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
Low Tide
8:05PM0.32m
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
part cloud
clear
clear
part cloud
part cloud
part cloud
cloud
clear
cloud
cloud
cloud
part cloud
clear
clear
clear
part cloud
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:45
6:43
6:43
6:43
6:41
6:41
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:08
6:08
6:08
6:09
6:09
6:09
6:10
 mm
Temp °C
22
20
21
22
21
22
22
22
25
24
21
23
23
22
23
22
21
23
23
Feels °C
22
18
22
22
19
23
23
19
24
21
19
24
21
23
23
20
19
22
19
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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.

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