Surf Forecasts:
Margaret River Mouth surf forecast from 9 Sep 2026:
- Best quality surf: Monday 14 Sep, 2AM (local time) - 6ft (1.9m), 14s period, WSW swell with cross-offshore winds.
- Most powerful swell: Sunday 13 Sep, 8PM (local time) - 6ft (1.9m), 15s period, WSW swell with 1,568 kJ wave energy.
- Next surfable swell (1★+): Thursday 10 Sep, 11PM (local time) - 3.5ft (1.0m), 16s period with WSW swell.
Best Forecast Surf Conditions for Margaret River Mouth this week:
The surf forecast for Margaret River Mouth over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Sep 10) at 11PM. The primary swell is predicted to be 1.0m and 16s period with a secondary swell of 0.4m and 21s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Margaret River Mouth in the next 16 days are 1.9m 15s and forecast to arrive on Sunday (Sep 13) at 8PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 6s period and expected on Friday (Sep 11) at 5PM.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Thu 10th Sep) | 3.5ft (1.0m) 16s |
| Best Surf | 2AM (Mon 14th Sep) | 6ft (1.9m) 14s |
| Most Powerful | 8PM (Sun 13th Sep) | 6ft (1.9m) 15s |
Table - best surf conditions forecast for Margaret River Mouth over the next 16 days.
The Lowdown
G’day surfers, Rusty here. Let’s have a look at what the next couple of weeks have on offer for us at the river mouth. It’s a bit of a mixed bag, so let’s wade through it.
The opening days are pretty much a write-off. We’ve got a bit of swell on the way, but it’s all arriving with winds that are going to chop it up and ruin the shape. We’re looking at a stagnant start until things finally clean up.
The first real bright spot comes on Monday the 14th of September. A new SW groundswell with a period of 14 seconds fills in, bumping the surf to a solid 6ft. What really makes it is the glassy, off-shore-esque conditions in the morning. The energy is still moderate at 1491, but it should be clean, lined-up, and offering some proper shape on the bank. This is the standout few hours in the forecast for the whole first part of this run.
From Tuesday morning the 15th, the swell starts to back off slightly to 5ft, but the wind swings SSE, giving us a clean cross-off. The energy drops a touch to 1002, but the surf is still very good. That afternoon, the wind picks up and ruins the fun, so make sure you’re out there early.
After that, things go downhill again for the rest of the week and into the weekend. The wind goes onshore or blows hard from the north, keeping it messy. We’re looking at a gap of poor conditions from Tuesday afternoon all the way through to Sunday the 20th, where we see the swell pick up again to 5ft with a moderate 1068 energy. But it’s still cross-onshore and not worth getting overly excited about.
Looking further out, the most promising session in the second week looks like Friday the 25th of September. The swell pushes back up to 4ft with a long 18-second period and the wind looks light and offshore in the morning. It’s a long way out, so don’t hold me to it, but it’s definitely the one to keep an eye on.
There’s also a big pulse of 7ft swell around Monday the 21st, but that’s arriving with a fresh to strong onshore breeze, so it’ll be a lumpy, messy, and pretty much unsurfable mess. That one’s all about the wind, not the waves.
So, bottom line: get on it Monday morning the 14th, and keep an eye on the 25th. Everything else in between is a wash.
Rusty, signing off.
Short Range ForecastLight rain (total 3mm), mostly falling on Fri night. Very mild (max 18°C on Thu afternoon, min 11°C on Thu morning). Winds increasing (light winds from the NNW on Thu afternoon, strong winds from the W by Fri night). | Days 5-7 Weather SummarySome drizzle, heaviest during Sun night. Warm (max 20°C on Tue afternoon, min 13°C on Sun night). Wind will be generally light. | ||||||||||||||||||
Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | ||||||||||||||
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) | SW 15 | SW 14 | SW 15 | WSW 15 | WSW 16 | WSW 18 | WSW 16 | WSW 16 | WSW 15 | WSW 14 | WSW 16 | WSW 16 | WSW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 |
Wave Graph  | |||||||||||||||||||
 kJ | 631 | 412 | 424 | 537 | 499 | 1106 | 961 | 749 | 1028 | 767 | 1041 | 1379 | 1272 | 1491 | 1368 | 1203 | 1002 | 822 | 612 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross | cross-off | cross-off | cross | cross-on | on | on | on | cross-on | on | cross-off | glassy | cross | off | cross-off | cross-off | cross-off |
High Tide | 00:04AM0.36m | 9:28AM0.68m | 11:05PM0.38m | 10:07AM0.60m | 10:45PM0.44m | 10:42AM0.50m | 10:37PM0.51m | 11:06AM0.41m | 10:36PM0.57m | 10:27AM0.32m | 10:42PM0.62m | 10:56PM0.65m | |||||||
Low Tide | 1:46AM0.36m | 5:17PM0.19m | 3:11AM0.33m | 5:11PM0.28m | 4:12AM0.30m | 4:29PM0.34m | 5:10AM0.29m | 3:31PM0.34m | 6:18AM0.30m | 2:31PM0.30m | 1:40PM0.24m | ||||||||
 |  | |  | |  |  | | | |  | | | | | | | | | |
 | — | 6:26 | — | — | 6:26 | — | — | 6:24 | — | — | 6:22 | — | — | 6:22 | — | — | 6:20 | — | — |
 | 6:06 | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:08 | — | — | 6:09 | — | — | 6:09 | — |
mm | — | — | — | — | — | — | 3 | — | — | — | — | — | 1 | — | — | — | — | — | — |
Temp °C | 17 | 15 | 18 | 16 | 17 | 18 | 18 | 16 | 16 | 16 | 17 | 17 | 16 | 17 | 17 | 17 | 19 | 20 | 16 |
Feels °C | 13 | 10 | 14 | 13 | 12 | 13 | 14 | 9 | 12 | 11 | 12 | 12 | 13 | 16 | 14 | 15 | 17 | 15 | 15 |
Swell 1 Height (m) Direction Period (s) | SW 15 | SW 14 | SW 15 | WSW 15 | WSW 16 | WSW 18 | WSW 16 | WSW 16 | WSW 15 | WSW 14 | WSW 16 | WSW 16 | WSW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 |
| kJ | 631 | 412 | 424 | 537 | 499 | 1106 | 961 | 749 | 1028 | 767 | 1041 | 1379 | 1272 | 1491 | 1368 | 1203 | 1002 | 822 | 612 |
Swell 2 Height (m) Direction Period (s) | SW 26 | WSW 24 | N 6 | S 11 | SW 19 | S 13 | — | W 9 | N 6 | WSW 19 | — | — | — | — | — | — | — | — | — |
| kJ | 26 | 54 | 11 | 9 | 376 | 3 | — | 210 | 3 | 69 | — | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | SW 26 | WSW 24 | SW 22 | S 11 | S 11 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 26 | 54 | 118 | 9 | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | E 7 | N 6 | — | NNE 6 | N 6 | N 6 | NW 6 | — | — | — | — | — | — | — | — | — | — | S 4 | S 5 |
| kJ | 17 | 16 | — | 6 | 30 | 36 | 46 | — | — | — | — | — | — | — | — | — | — | 5 | 12 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 3 | 33 | 26 | 3 | 33 | 43 | 151 | 889 | 1782 | 194 | 356 | 356 | 0 | 0 | 7 | 0 | 0 | 44 | 0 |
Best forecast wave conditions in Margaret River | |||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||
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Information about the Margaret River Mouth Surf forecast
The above surf forecast table for Margaret River Mouth provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Margaret River Mouth can be found by selecting the local surf guide option on the grey menu. Our Margaret River Mouth 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 (Margaret River Mouth) 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 Margaret River Mouth 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.
Margaret River Mouth is 92 km (57 miles) from the city of Bunbury. If you plan a holiday in Margaret River, look for hotels and other accommodation in Bunbury. Bunbury has rooms for a wide range of budgets as well as car hire and transport links.
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