
Surf Forecasts:
Main Beach surf forecast from 6 Aug 2026:
- Best quality surf: Saturday 8 Aug, 11PM (local time) - 15ft (4.5m), 17s period, WSW swell with cross-onshore winds.
- Most powerful swell: Tuesday 11 Aug, 8AM (local time) - 16ft (5.0m), 18s period, WSW swell with 14,532 kJ wave energy.
- Next surfable swell (1★+): Saturday 8 Aug, 11PM (local time) - 15ft (4.5m), 17s period with WSW swell.
Best Forecast Surf Conditions for Main Beach this week:
The surf forecast for Main Beach over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Aug 08) at 11PM. The primary swell is predicted to be 4.5m and 17s period with a secondary swell of 4.5m and 17s. The wind is predicted to be cross-onshore as the swell arrives.
The most powerful waves expected at Main Beach in the next 16 days are 5.0m 18s and forecast to arrive on Tuesday (Aug 11) at 8AM. Winds are predicted to be cross-offshore at the time the swell arrives.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Sat 8th Aug) | 15ft (4.5m) 17s |
| Best Surf | 11PM (Sat 8th Aug) | 15ft (4.5m) 17s |
| Most Powerful | 8AM (Tue 11th Aug) | 16ft (5.0m) 18s |
Table - best surf conditions forecast for Main Beach over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s cooking for Main Beach, because it’s been a while since we’ve had a proper glassy session, and this stretch looks like it’s going to test our patience.
Right off the bat, the water is a bit of a shocker – it’s sitting at 62°, which is a solid 4° colder than average for this time of year. That’s a proper full wetsuit and booties situation, so don’t even think about a spring suit.
The forecast starts with a big sigh. From Thursday, the 6th of August right through till the end of Sunday, the 9th, we’re looking at a washout. We’ve got a massive WSW groundswell, but the wind is a nightmare – cross-onshore, onshore, and even a near gale on Saturday hitting 31 mph. The wave energy is off the charts, but it’s all blown out, choppy, and messy. Not worth paddling out. The swell is over 8 feet, so it’s for experts only if you were daft enough to try, but honestly, the wind will ruin it.
Monday the 10th is more of the same – strong winds and messy seas. But then, we get a glimmer. Tuesday the 11th of August is the standout. The swell is still big, with WSW groundswell hitting 15 feet and a very long period of 17 seconds. The combined energy is massive. But the wind swings SSE at 13 mph, blowing clean and cross-offshore. The caveat here is that the swell is so big, it’s likely too big for Main Beach, which is a beach/groyne set-up. That long period groundswell is going to be breaking straight and fast, making it really only for the experts. The text says the conditions are favorable, but the size is the issue. If you’re an experienced charger, this is your window. Expect crowds, as it’s often busy.
Wednesday the 12th and Thursday the 13th offer a bit of a reprieve. The swell drops to around 6 to 7 feet, still with that long period groundswell. Thursday morning the 13th is looking cleaner with light NE cross-offshore wind, and the data says it’s excellent for experienced surfers. Friday the 14th morning is also a nice prospect with similar conditions – clean, 7 foot swell, and light ENE winds. This is a decent option for the more experienced crew.
After that, we hit another rough patch. From Sunday the 16th through to Tuesday the 18th, the wind is back onshore and cross-onshore, with the swell staying solid and messy. Not good.
Then, look at Wednesday the 19th. The afternoon shows a huge 12 foot swell from the WSW with a very long 18 second period. The wind is cross-shore at 13 mph, and the conditions are favorable for wind and tide, but again, it’s flagged as potentially too big for the break. It’s a late call for the big-wave crew.
Finally, Thursday the 20th of August morning is a real beauty. The swell drops to a manageable 7 feet, still with a good 16 second period. The wind is a light 6 mph from the north, cross-offshore, and the data says it’s excellent for experienced surfers. This is the other best bet in the window. It’s clean and punchy. Friday the 21st afternoon looks like a real treat, too – 8 feet from the SW, glassy conditions with no wind, but the swell direction is a bit different.
So, to sum it up: the best of the bunch is Tuesday the 11th of August for the thrill-seekers who can handle a big, clean, powerful groundswell, and Thursday the 20th of August morning for a cleaner, slightly smaller session. For the rest, it’s a lot of waiting for the wind to play ball.
Rusty.
Short Range ForecastHeavy rain (total 20mm), heaviest during Thu night. Very mild (max 17°C on Thu afternoon, min 12°C on Sat morning). Winds decreasing (strong winds from the SW on Fri night, light winds from the SE by Sat night). | Days 4-6 Weather SummaryModerate rain (total 16mm), heaviest on Mon night. Very mild (max 17°C on Mon morning, min 8°C on Tue morning). Winds decreasing (near gales from the SW on Mon night, light winds from the ESE by Tue night). | ||||||||||||||||||||
Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | |||||||||||||||
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) | WSW 16 | WSW 16 | WSW 16 | WSW 15 | WSW 15 | WSW 15 | WSW 14 | WSW 16 | WSW 17 | WSW 16 | WSW 16 | WSW 15 | WSW 9 | WSW 11 | WSW 14 | WSW 17 | WSW 17 | WSW 16 | WSW 15 | WSW 15 | WSW 15 |
Wave Graph | |||||||||||||||||||||
3685 | 3213 | 2008 | 2982 | 3333 | 4736 | 6912 | 10064 | 9730 | 5536 | 2900 | 2655 | 1788 | 4648 | 10571 | 12354 | 6295 | 3113 | 2126 | 1911 | 1821 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | on | cross-on | on | cross-on | cross-on | cross-on | cross | cross | on | on | on | cross-on | cross-on | cross-off | cross | cross-off | cross | cross-on | off |
High Tide | 4:03AM0.62m | 5:14AM0.67m | 6:20AM0.71m | 7:19AM0.74m | 8:13AM0.75m | 9:00AM0.72m | |||||||||||||||
Low Tide | 2:52PM0.14m | 3:04PM0.06m | 3:34PM-0.01m | 4:08PM-0.04m | 4:43PM-0.05m | 5:17PM-0.02m | 5:43PM0.04m | ||||||||||||||
7:01 | — | — | 7:01 | — | — | 7:00 | — | — | 6:58 | — | — | 6:58 | — | — | 6:58 | — | — | 6:56 | — | — | |
— | 5:43 | — | — | 5:44 | — | — | 5:45 | — | — | 5:45 | — | — | 5:45 | — | — | 5:45 | — | — | 5:46 | — | |
mm | — | — | 8 | 2 | — | 4 | 4 | 2 | — | — | 1 | 1 | 4 | 2 | 8 | — | — | — | — | — | — |
Temp °C | 16 | 17 | 17 | 16 | 16 | 15 | 13 | 14 | 14 | 13 | 16 | 16 | 17 | 14 | 13 | 10 | 14 | 13 | 13 | 15 | 16 |
Feels °C | 13 | 12 | 13 | 13 | 10 | 7 | 3 | 5 | 7 | 10 | 12 | 11 | 8 | 4 | 2 | 4 | 8 | 9 | 10 | 14 | 14 |
Swell 1 Height (m) Direction Period (s) | WSW 16 | WSW 16 | WSW 16 | WSW 15 | — | — | — | NW 12 | WSW 17 | WSW 16 | WSW 16 | — | — | — | — | WSW 17 | W 10 | WSW 16 | WSW 15 | WSW 15 | WSW 15 |
3685 | 3213 | 2008 | 2982 | — | — | — | 6 | 9730 | 5536 | 2900 | — | — | — | — | 12354 | 546 | 3113 | 2126 | 1911 | 1821 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | W 8 | — | — | — | — | — | — | — | WSW 7 | W 8 | — |
— | — | — | — | — | — | — | — | — | — | 177 | — | — | — | — | — | — | — | 147 | 90 | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | WSW 21 | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | 353 | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | WSW 9 | — | WSW 15 | WSW 15 | WSW 14 | WSW 16 | — | — | — | WSW 15 | WSW 9 | WSW 11 | WSW 14 | — | WSW 17 | WSW 8 | — | — | — |
— | — | 453 | — | 3333 | 4736 | 6912 | 10064 | — | — | — | 2655 | 1788 | 4648 | 10571 | — | 6295 | 322 | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 357 | 369 | 147 | 400 | 400 | 1993 | 1993 | 1993 | 66 | 8 | 400 | 369 | 913 | 1993 | 2147 | 2452 | 2462 | 0 | 20 | 26 | 0 |
Best forecast wave conditions in Perth City Coast | |||||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||||
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Information about the Main Beach Surf forecast
The above surf forecast table for Main Beach provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Main Beach can be found by selecting the local surf guide option on the grey menu. Our Main 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 (Main 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 Main 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 Main Beach, camping, hotels and holiday cottages in Perth City Coast, consider staying in Perth which is 7 km (4 miles) away. Other places in and around Perth City Coast where you can find information about places to rent, and car hire include Fremantle which is 9 km (6 miles) away, Canning Vale, Gosnells and Kwinana.











