Surf Forecasts:
Back Beach surf forecast from 14 Sep 2026:
- Best quality surf: Friday 18 Sep, 8AM (local time) - 10ft (3.0m), 8s period, WSW swell with cross-offshore winds.
- Most powerful swell: Friday 18 Sep, 5PM (local time) - 10ft (3.0m), 17s period, WSW swell with 5,076 kJ wave energy.
- Next surfable swell (1★+): Wednesday 16 Sep, 11AM (local time) - 6ft (1.8m), 14s 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 Wednesday (Sep 16) at 11AM. The primary swell is predicted to be 1.8m and 14s period. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Back Beach in the next 16 days are 3.0m 17s and forecast to arrive on Friday (Sep 18) at 5PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 4s period and expected on Tuesday (Sep 15) at 11AM.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11AM (Wed 16th Sep) | 6ft (1.8m) 14s |
| Best Surf | 8AM (Fri 18th Sep) | 10ft (3.0m) 8s |
| Most Powerful | 5PM (Fri 18th Sep) | 10ft (3.0m) 17s |
Table - best surf conditions forecast for Back Beach over the next 16 days.
The Lowdown
Rusty here again, let's talk about Back Beach in units that make sense for the average bloke.
We've got a solid run of groundswell comin' through, but honestly, this is a bit of a mixed bag. The water temp is about average for the time of year, so no surprises there. The first real standout is on Wednesday the 16th morning. We've got a solid 6ft groundswell from the WSW with a nice 14-second period pushin' through, and with that NE offshore wind blowin' at 16 mph, Back Beach is gonna be clean as a whistle. The combined swell energy is moderate (1314), but the conditions are top-notch for experienced surfers. If you're a beginner, this might be a bit too much grunt – anything over 5ft starts to get tricky for the groms.
Then, we hit a real heavy patch. Friday the 18th afternoon sees a massive jump – a 10ft swell from the WSW with a very long 17-second period. The energy is strong (5076), and the wind is off-shore, makin' it look clean, but the file is pretty clear – this is too big for this break unless you are a seasoned charger. The same goes for the next few days. Saturday the 19th and Sunday the 20th are all blown out by cross-onshore winds, and the swell stays solidly over 8ft, so keep the big-gun boards in the car or just watch from the beach.
There’s a bit of a breather on Sunday the 20th morning with the swell droppin' to 6ft again, and it's clean with a light cross-shore breeze, but the energy is a bit weaker (1103) and it's only marginal quality.
If you're lookin' further out, Monday the 28th morning is one to circle on the calendar. A 7ft WSW groundswell with a 15-second period, combined energy at a solid 2860, and clean offshore NE winds at 9 mph. It says "excellent for experienced surfers," so the vibe will be good, but be warned – this break can draw a crowd sometimes, so get in early.
The absolute standout window, though, might be the start of the second week. Monday the 28th is excellent, but Tuesday the 29th morning is the real gem. Perfect 8ft groundswell from the WSW, a meaty 15-second period, and the combined energy is 2572. The best part? Dead glassy conditions – zero wind. That is a magic moment, and you'd be a fool to miss it. It's solid, so keep it for the experienced crew.
Overall, the first week is a game of dodging the big, blowy stuff for the few clean windows on Wednesday and Sunday. The second week looks a lot more promising, with Monday 28th and that epic Tuesday 29th morning glass-off being the real standouts. Don't sleep on those.
- Rusty
Short Range ForecastLight rain (total 2mm), mostly falling on Wed morning. Warm (max 29°C on Wed afternoon, min 14°C on Mon night). Winds decreasing (fresh winds from the S on Tue afternoon, light winds from the E by Wed night). | Days 5-7 Weather SummaryModerate rain (total 10mm), heaviest on Fri afternoon. Very mild (max 19°C on Fri morning, min 14°C on Fri afternoon). Winds decreasing (strong winds from the NW on Fri night, calm by Sat night). | ||||||||||||||||||
Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | ||||||||||||||
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) | WSW 14 | WSW 14 | WSW 14 | WSW 14 | WSW 14 | WSW 14 | WSW 16 | WSW 14 | WSW 14 | WSW 13 | WSW 10 | WSW 17 | WSW 16 | WSW 15 | WSW 14 | WSW 13 | WSW 13 | WSW 12 | WSW 15 |
Wave Graph  | |||||||||||||||||||
 kJ | 3257 | 2878 | 2589 | 1900 | 1314 | 943 | 921 | 722 | 682 | 434 | 1863 | 5076 | 4895 | 4647 | 3594 | 1989 | 1103 | 920 | 2530 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-on | cross-off | off | cross-on | off | cross | cross | cross-off | cross | cross-off | on | cross-on | cross-on | cross-on | cross | on | cross-off |
High Tide | 10:52PM0.57m | 9:04AM0.24m | 11:10PM0.58m | 11:32PM0.59m | 00:00AM0.57m | 00:41AM0.55m | 2:59AM0.52m | ||||||||||||
Low Tide | 6:49AM0.24m | 2:54PM0.21m | 2:07PM0.17m | 1:57PM0.14m | 2:13PM0.12m | 2:31PM0.11m | 2:48PM0.10m | ||||||||||||
 |  | | |  | |  |  | | | |  |  | | |  | | | | |
 | — | 6:18 | — | — | 6:16 | — | — | 6:16 | — | — | 6:13 | — | — | 6:13 | — | — | 6:11 | — | — |
 | 6:09 | — | 6:09 | — | — | 6:10 | — | — | 6:10 | — | — | 6:12 | — | — | 6:12 | — | — | 6:13 | — |
mm | — | — | — | — | 1 | — | 1 | — | — | — | — | 7 | 3 | — | — | — | — | — | — |
Temp °C | 17 | 21 | 25 | 21 | 25 | 29 | 24 | 21 | 21 | 18 | 19 | 15 | 17 | 16 | 16 | 16 | 17 | 18 | 16 |
Feels °C | 13 | 18 | 23 | 18 | 22 | 28 | 24 | 19 | 19 | 17 | 15 | 9 | 8 | 10 | 11 | 13 | 16 | 15 | 13 |
Swell 1 Height (m) Direction Period (s) | WSW 14 | WSW 14 | WSW 14 | WSW 14 | WSW 14 | WSW 14 | WSW 16 | WSW 14 | WSW 14 | WSW 13 | WSW 16 | — | WSW 16 | WSW 15 | WSW 14 | WSW 13 | WSW 13 | WSW 12 | WSW 15 |
| kJ | 3257 | 2878 | 2589 | 1900 | 1314 | 943 | 921 | 722 | 682 | 434 | 417 | — | 4895 | 4647 | 3594 | 1989 | 1103 | 920 | 2530 |
Swell 2 Height (m) Direction Period (s) | — | SW 20 | — | SSW 6 | — | — | SW 22 | WSW 20 | WSW 20 | WSW 18 | WSW 20 | — | WSW 16 | — | — | — | — | — | — |
| kJ | — | 97 | — | 46 | — | — | 18 | 76 | 39 | 184 | 75 | — | 2080 | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | ESE 4 | — | — | — | — | — | NW 3 | NW 4 | WNW 6 | WSW 10 | WSW 17 | — | — | — | — | — | SSW 3 | — |
| kJ | — | 5 | — | — | — | — | — | 4 | 16 | 81 | 1863 | 5076 | — | — | — | — | — | 5 | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 108 | 3 | 104 | 3 | 0 | 71 | 0 | 474 | 474 | 377 | 445 | 515 | 725 | 1018 | 1813 | 178 | 178 | 370 | 0 |
Best forecast wave conditions in Perth City Coast | |||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||
Header Global | |||||||||||||||||||
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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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