Back Beach Surf Break

Lat Long: 30.94° S 115.28° E

Back Beach Surf Forecast and Surf Report

Issued: 7 am 21 Aug 2026 (local time)

Forecast update in  hr  min

Today's Back Beach sea temperature is
18.6° C
0.6° 

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


Back Beach surf forecast from 21 Aug 2026:

  • Best quality surf: Friday 21 Aug, 5PM (local time) - 10ft (3.0m), 15s period, WSW swell with cross-onshore winds.
  • Most powerful swell: Wednesday 26 Aug, 11PM (local time) - 15ft (4.5m), 17s period, WSW swell with 12,188 kJ wave energy.
  • Next surfable swell (1★+): Friday 21 Aug, 5PM (local time) - 10ft (3.0m), 15s period with WSW swell.

Best Forecast Surf Conditions for Back Beach this week:

The surf forecast for Back Beach over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Aug 21) at 5PM. The primary swell is predicted to be 3.0m and 15s period with a secondary swell of 0.2m and 24s. The wind is predicted to be cross-onshore as the swell arrives.

The most powerful waves expected at Back Beach in the next 16 days are 4.5m 17s and forecast to arrive on Wednesday (Aug 26) at 11PM. Winds are predicted to be onshore at the time the swell arrives.

Wave TypeTime (AWST) & Date Wave Height & Period
Next good surf (1 star+) 5PM (Fri 21st Aug)10ft (3.0m) 15s
Best Surf 5PM (Fri 21st Aug)10ft (3.0m) 15s
Most Powerful11PM (Wed 26th Aug)15ft (4.5m) 17s

Table - best surf conditions forecast for Back Beach over the next 16 days.


The Lowdown

G'day, I'm Rusty, and I've got the full rundown on what's coming our way at Back Beach. This spot is exposed to the southwest swell, but she's a tricky one to call because the majority of the run is going to be way too big for most of us. The water temp is sitting at about 66°, which is pretty normal for this time of year, so no surprises there.

The whole forecast period is a tale of two extremes: either the swell is pumping and the conditions are too gnarly, or it's dropping off but the wind is working against us. There's a big gap from now until the morning of Saturday the 24th of August where it's either too big, or the wind is just messy. The standouts are few and far between, but there are a couple of windows for the experienced crew.

The best of the lot, and the one to really circle on the calendar, is the morning of Monday the 24th of August. We've got a solid 8 ft swell from the WSW but the magic is in the wind—it's dead glassy. The combined energy is pumping at 2736, but the period is 14 seconds, so it's a proper groundswell. This is going to be a clean, powerful wave, but at that size, it's really only for the experienced surfers. It won't be a total zoo, but crowds can be possible here, so be early.

Another morning that's worth a look is Tuesday the 25th of August. The swell drops to 5 ft from the WSW, and we've got a clean, cross-offshore breeze from the NW. The energy is moderate at 1505, and the 13-second period will still give you some good shape. It's a much more manageable size, and it'll be clean.

After that, the surf gets wild again. The morning of Wednesday the 26th of August is a massive 13 ft from the WSW with a 19-second period and a cross-shore wind. The energy is insane at 10264, but that's a dangerous, heavy setup for experts only, and the wind is not helping. Then Thursday the 27th of August is still 12 ft from the same direction, just too big for the average surfer.

For a bit of a breather, the morning of Saturday the 29th of August is okay. We've got a 5 ft swell from the WSW with a solid offshore breeze from the ENE. The energy is moderate at 837, and the 12-second period is a bit shorter, but it'll be clean. It's a good option for the bigger crew, but the waves might be a bit weak.

The morning of Monday the 31st of August is another one for the experienced crew. 8 ft from the WSW, 16-second period, and a clean cross-offshore breeze from the NNW. The energy is strong at 3184, and it's glassy clean. It'll be a proper session for those who are comfortable in that size.

Later in the run, the morning of Saturday the 5th of September is a solid bet. The swell is 8 ft but from the SW, and we've got a clean cross-offshore breeze from the ESE. The energy is moderate at 2125, and the 14-second period is good. The direction is a bit more favorable, and it's clean. Again, it's a bit of size, so it's for the experienced crew.

Overall, there's no surf for beginners in this window. The consistent swell is too big for most of the run, and when it drops, the wind is often onshore. The best bet is to wait for those glassy or clean offshore windows, especially the morning of the 24th of August. It's a long-range call, but it's looking like a classic winter swell. Stay safe out there.

Rusty

Short Range Forecast

Light rain (total 2mm), mostly falling on Sat afternoon. Warm (max 21°C on Fri afternoon, min 13°C on Fri morning). Winds decreasing (fresh winds from the S on Sat night, light winds from the SE by Sun night).

Days 4-6 Weather Summary

Heavy rain (total 20mm), heaviest during Wed afternoon. Very mild (max 17°C on Tue morning, min 13°C on Mon morning). Winds increasing (calm on Mon morning, fresh winds from the SW by Wed night).

Friday
21
Saturday
22
Sunday
23
Monday
24
Tuesday
25
Wednesday
26
Thursday
27
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
!
!
5
!
0
0
0
1
3
4
2
4
4
2
2
!
0
0
!
0
!
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
3
WSW
15
3
WSW
15
2.5
WSW
15
3
WSW
17
2.3
WSW
16
1.8
WSW
15
1.6
WSW
14
2
WSW
13
2.5
WSW
16
2.5
WSW
14
2.3
WSW
14
2
WSW
13
1.6
WSW
13
2.1
WSW
15
2.4
WSW
14
4
WSW
19
4.5
WSW
18
4.5
WSW
17
3.5
WSW
16
3.5
WSW
15
3
WSW
14
Wave Graph
Metric surfscale
Energy kJ
3574
3227
2842
4478
2629
1447
1028
1444
3417
2736
1889
1309
822
1797
2099
10264
11338
10775
6584
4517
3052
Wind (km/h)
20
ESE
20
SSE
15
ESE
10
W
30
S
30
SSW
20
S
15
SSW
10
SSE
5
SW
10
WSW
5
N
15
NW
20
WNW
15
NW
30
NW
20
SW
25
SSW
20
SSE
25
SSE
15
ESE
Wind State
cross-off
cross-on
cross-off
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
glassy
on
cross-off
cross-off
cross
cross
cross
on
on
cross
cross-on
cross-off
High Tide
4:40AM0.56m
5:51AM0.58m
6:45AM0.60m
7:29AM0.61m
8:07AM0.62m
8:41AM0.61m
11:12PM0.32m
Low Tide
3:26PM0.10m
3:41PM0.08m
3:58PM0.07m
4:13PM0.07m
4:26PM0.07m
4:35PM0.09m
4:39PM0.11m
2:02AM0.29m
clear
clear
part cloud
clear
rain showers
cloud
rain showers
clear
part cloud
clear
clear
clear
clear
clear
clear
rain showers
thunderstorm
rain showers
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:48
6:47
6:46
6:45
6:43
6:43
6:41
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:55
5:55
5:57
5:58
5:58
5:59
5:59
 mm
1
1
2
15
3
Temp °C
17
21
19
18
18
16
17
17
16
15
16
16
17
17
16
17
17
17
15
16
16
Feels °C
13
18
15
17
15
10
12
13
13
14
13
14
15
14
13
13
12
10
11
11
12
  • 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 Back Beach Surf forecast

The above surf forecast table for Back Beach provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Back Beach can be found by selecting the local surf guide option on the grey menu. Our Back Beach 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 (Back Beach) 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 Back Beach 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 Perth City Coast? If you are looking for accommodation near Back Beach, camping, hotels and holiday cottages in Perth City Coast, consider staying in Perth which is 125 km (78 miles) away.

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