Surf Forecasts:
Watermans surf forecast from 18 Aug 2026:
- Best quality surf: Wednesday 19 Aug, 11PM (local time) - 10ft (3.0m), 16s period, WSW swell with cross-offshore winds.
- Most powerful swell: Thursday 20 Aug, 5AM (local time) - 10ft (3.0m), 16s period, WSW swell with 5,336 kJ wave energy.
- Next surfable swell (1★+): Wednesday 19 Aug, 11PM (local time) - 10ft (3.0m), 16s period with WSW swell.
Best Forecast Surf Conditions for Watermans this week:
The surf forecast for Watermans over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Aug 19) at 11PM. The primary swell is predicted to be 3.0m and 16s period. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Watermans in the next 16 days are 3.0m 16s and forecast to arrive on Thursday (Aug 20) at 5AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 4s period and expected on Friday (Aug 21) at 11PM.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Wed 19th Aug) | 10ft (3.0m) 16s |
| Best Surf | 11PM (Wed 19th Aug) | 10ft (3.0m) 16s |
| Most Powerful | 5AM (Thu 20th Aug) | 10ft (3.0m) 16s |
Table - best surf conditions forecast for Watermans over the next 16 days.
The Lowdown
Alright, Rusty here, let’s talk about what’s on the menu for Watermans. The swell window is open, and we’ve got a solid run of groundswell on the way, but it’s not all clean. This is a reef break, so we’re looking at a setup that can handle the long-period energy we’re seeing.
The first real action kicks off Tuesday afternoon, August 18th. We’ve got a big 12ft swell from the WSW with a 16-second period, packing a massive 6651 (moderate to strong wave energy). The wind is cross-on from the WNW at 9 mph, so it’s a bit choppy and not the cleanest. Water temp is sitting at 64°, which is a bit colder than normal for this time of year, so you’ll want a good wetsuit.
The standout window is Thursday morning, August 20th. We’ve got a solid 10ft swell from the WSW, still with that long 16-second period, and the wind is glassy from the SE. The energy is strong at 4242, and this is the kind of clean, lined-up groundswell that Watermans can turn into a proper wave. Get on it.
After that, Friday morning, August 21st, offers a good option too. The swell drops slightly to 8ft from the WSW, 15-second period, but the wind is offshore from the E at 6 mph. The energy is still moderate at 2513, and the easterly breeze will keep it clean. A solid morning session.
Saturday morning, August 22nd, is worth a mention. The swell is 7ft from the WSW, with a very long 17-second period, and a light cross-off breeze from the NNE. Clean conditions (2492 energy), but that long period can make things a bit straight at a reef, so watch for the sets.
We hit a rough patch from Tuesday, August 25th, through Wednesday, August 26th. Strong onshore winds and rain make for poor conditions, with the swell size ramping up to 10ft. It’s a mess, better to sit this out.
Things clean up again on Thursday morning, August 27th, with a 7ft swell from the WSW and a light cross-off breeze from the NE. Clean conditions (1941 energy), a good return to form.
The second week settles down. Friday, August 28th, has a smaller 4ft swell from the SW with offshore winds from the E. Clean with moderate energy (594 to 735). Not huge, but fun.
Monday morning, August 31st, offers another clean window with a 6ft swell from the WSW and a light cross-off breeze from the NE. Clean and consistent.
The tail end of the outlook, September 1st and 2nd, sees a bump in swell back to 8ft from the WSW with a 17-second period, but the wind is mostly cross-shore or cross-on, and the energy is high (3995 to 4074). It’s more of a challenge than a clean session.
Overall, Thursday the 20th is the clear winner. Glassy, 10ft groundswell, and the reef will handle the long period beautifully. Don’t sleep on Friday morning the 21st or Thursday morning the 27th either.
Stay sharp, keep your eyes on the horizon.
Rusty
Short Range ForecastLight rain (total 4mm), mostly falling on Tue night. Very mild (max 17°C on Wed morning, min 12°C on Fri morning). Wind will be generally light. | Days 5-7 Weather SummarySome drizzle, heaviest during Sat afternoon. Very mild (max 19°C on Fri afternoon, min 13°C on Sat night). Mainly fresh winds. | |||||||||||||||||||
Tue 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | ||||||||||||||
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 15 | WSW 15 | WSW 16 | WSW 16 | WSW 16 | WSW 16 | WSW 15 | WSW 14 | WSW 14 | WSW 17 | WSW 16 | SW 14 | WSW 14 | WSW 13 | WSW 16 | WSW 14 | WSW 14 | WSW 13 |
Wave Graph  | ||||||||||||||||||||
 kJ | 6651 | 4456 | 2899 | 4122 | 5140 | 4242 | 3480 | 3116 | 2513 | 2412 | 2082 | 2492 | 1699 | 1321 | 908 | 875 | 2583 | 1624 | 1265 | 769 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | cross-on | on | cross-off | glassy | cross | off | off | cross | off | cross-off | cross | cross | cross | cross-on | cross-off | cross | on | cross-on |
High Tide | 1:02AM0.55m | 1:48AM0.56m | 3:23AM0.56m | 4:57AM0.57m | 6:04AM0.59m | 6:56AM0.61m | ||||||||||||||
Low Tide | 4:30PM0.19m | 3:35PM0.16m | 3:17PM0.13m | 3:28PM0.10m | 3:45PM0.09m | 4:02PM0.08m | 4:17PM0.08m | |||||||||||||
 |  |  |  |  | | |  | | | | | |  | | | | | | | |
 | — | — | 6:48 | — | — | 6:48 | — | — | 6:47 | — | — | 6:46 | — | — | 6:45 | — | — | 6:43 | — | — |
 | 5:51 | — | — | 5:52 | — | — | 5:52 | — | — | 5:52 | — | — | 5:53 | — | — | 5:53 | — | — | 5:54 | — |
mm | — | 1 | 2 | — | 1 | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — |
Temp °C | 16 | 16 | 17 | 17 | 16 | 16 | 17 | 16 | 17 | 19 | 18 | 19 | 18 | 16 | 15 | 16 | 16 | 16 | 16 | 16 |
Feels °C | 12 | 12 | 16 | 14 | 15 | 15 | 14 | 13 | 15 | 17 | 14 | 17 | 15 | 11 | 12 | 14 | 15 | 14 | 13 | 13 |
Swell 1 Height (m) Direction Period (s) | WSW 16 | WSW 16 | WSW 15 | WSW 15 | WSW 16 | WSW 16 | WSW 16 | WSW 16 | WSW 15 | WSW 14 | WSW 14 | WSW 17 | WSW 16 | SW 14 | WSW 14 | WSW 13 | WSW 16 | WSW 14 | WSW 14 | WSW 13 |
| kJ | 6651 | 4456 | 2899 | 4122 | 5140 | 4242 | 3480 | 3116 | 2513 | 2412 | 2082 | 2492 | 1699 | 1321 | 908 | 875 | 2583 | 1624 | 1265 | 769 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | SW 19 | — | — | WSW 21 | WSW 19 | WSW 18 | — | — | — | WSW 18 |
| kJ | — | — | — | — | — | — | — | — | — | — | 546 | — | — | 43 | 415 | 721 | — | — | — | 31 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | S 4 | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | 5 | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | SSW 3 | — | SW 5 | SW 7 | — | — | — | W 4 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | 7 | — | 56 | 143 | — | — | — | 14 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 358 | 296 | 200 | 82 | 0 | 0 | 34 | 0 | 0 | 163 | 0 | 0 | 201 | 163 | 18 | 82 | 0 | 24 | 282 | 384 |
Best forecast wave conditions in Perth City Coast | ||||||||||||||||||||
Best forecast wave conditions in Australia | ||||||||||||||||||||
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Information about the Watermans Surf forecast
The above surf forecast table for Watermans provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Watermans can be found by selecting the local surf guide option on the grey menu. Our Watermans 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 (Watermans) 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 Watermans 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 Watermans, camping, hotels and holiday cottages in Perth City Coast, consider staying in Perth which is 17 km (11 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 25 km (16 miles) away, Canning Vale, Gosnells and Kwinana.
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