Surf Forecasts:
Margaret River Mouth surf forecast from 4 Aug 2026:
- Most powerful swell: Monday 10 Aug, 11PM (local time) - 10ft (3.0m), 18s period, SW swell with 6,764 kJ wave energy.
Best Forecast Surf Conditions for Margaret River Mouth this week:
The most powerful waves expected at Margaret River Mouth in the next 16 days are 3.0m 18s and forecast to arrive on Monday (Aug 10) at 11PM. Winds are predicted to be cross-shore at the time the swell arrives.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11PM (Mon 10th Aug) | 10ft (3.0m) 18s |
Table - best surf conditions forecast for Margaret River Mouth over the next 16 days.
The Lowdown
Alright, Rusty here, talking about the Margaret River Mouth spot. The next two weeks are a real mixed bag of frustration: big, powerful groundswell, but the wind just won’t cooperate. There’s no perfect day, but a couple of sessions might be worth a paddle.
Starting Tuesday, the 4th of August, it’s a no-go. You’ve got a 6ft swell from the WSW, but a 16-mph wind straight onshore is making it a mess. The water is 67°F, which is about 4°F above normal for this time of year – that’s noticeably warmer than usual.
The whole first week is a struggle. Wednesday the 5th has a swell jumping to 8ft, but the wind is a light cross-onshore, leaving the surface lumpy. The swell is a long 16 seconds, which is too much length for a river mouth – it’ll just close out. The combined energy is a massive 2844, but it’s wasted.
From Thursday through Saturday, the wind is a strong 20-25 mph from the SW, making it messy and dangerous. On Saturday the 8th, the swell hits a massive 12ft from the SW, with a combined energy of 5330. That’s expert territory, and with the strong cross-onshore wind, it’s more of a kite-surfing day than a paddle-surfing one.
The second week offers a tiny bit of hope. On Monday the 10th, the swell is still 8-8ft, but the wind is a moderate cross-shore, which is the best we get. It’s still creating a chop, but it’s the most ridable of the whole mess.
The only real window is Sunday the 16th of August. The swell drops to a manageable 6ft from the SW, and the wind is a light 9 mph from the WNW, blowing straight onshore. The lighter wind will make it the most surfable session of the entire forecast. The combined energy is a moderate 1845, and it’s the only day rated as “marginal” instead of “poor”.
After that, it’s back to strong winds and messy conditions. The 18th and 19th of August are a repeat of the pattern: strong 28 mph WNW winds and solid 7-8ft swell, but blown out.
So, no real standouts here. The shelter of the river mouth isn’t enough to fix the wind issue. If you’re keen, aim for the morning of the 16th of August. Otherwise, it’s a wait-and-see forecast.
Rusty.
Short Range ForecastModerate rain (total 15mm), heaviest on Thu afternoon. Very mild (max 17°C on Wed night, min 14°C on Thu night). Winds increasing (calm on Wed afternoon, fresh winds from the WNW by Thu afternoon). | Days 5-7 Weather SummaryModerate rain (total 16mm), heaviest on Fri night. Very mild (max 16°C on Fri afternoon, min 10°C on Fri night). Winds decreasing (near gales from the SW on Fri night, moderate winds from the WSW by Sun morning). | |||||||||||||||||||
Tue 4 | Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | ||||||||||||||
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 | SW 16 | SW 16 | WSW 16 | WSW 16 | WSW 16 | WSW 16 | SW 15 | SW 15 | WSW 15 | SW 11 | SW 15 | SW 16 | SW 17 | SW 16 | SW 16 | SW 15 | SW 13 | SW 16 | SSW 18 |
Wave Graph  | ||||||||||||||||||||
 kJ | 1614 | 1611 | 2844 | 2785 | 2615 | 2033 | 2128 | 2176 | 1619 | 1860 | 1795 | 5330 | 5823 | 5432 | 3193 | 2443 | 2038 | 1831 | 3559 | 5795 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | cross-on | cross-on | cross-on | cross-on | on | on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross | cross | cross |
High Tide | 2:25AM0.55m | 3:31AM0.61m | 4:48AM0.68m | 5:58AM0.74m | 7:00AM0.80m | 7:55AM0.84m | ||||||||||||||
Low Tide | 5:41PM0.29m | 3:22PM0.24m | 3:00PM0.14m | 3:21PM0.05m | 3:54PM-0.02m | 4:31PM-0.07m | 5:11PM-0.07m | |||||||||||||
 |  |  |  | |  |  | | | |  | | |  | | | |  | |  | |
 | — | — | 7:09 | — | — | 7:09 | — | — | 7:07 | — | — | 7:07 | — | — | 7:05 | — | — | 7:05 | — | — |
 | 5:42 | — | — | 5:42 | — | — | 5:43 | — | — | 5:44 | — | — | 5:44 | — | — | 5:45 | — | — | 5:45 | — |
mm | — | 1 | 2 | — | 4 | 1 | 5 | 1 | 1 | 1 | 7 | 3 | 2 | — | — | 1 | 2 | — | — | — |
Temp °C | 15 | 16 | 16 | 16 | 17 | 17 | 17 | 16 | 15 | 16 | 14 | 12 | 13 | 14 | 15 | 15 | 15 | 13 | 14 | 13 |
Feels °C | 10 | 11 | 13 | 15 | 12 | 11 | 11 | 11 | 10 | 10 | 5 | 1 | 4 | 8 | 10 | 9 | 8 | 6 | 7 | 8 |
Swell 1 Height (m) Direction Period (s) | WSW 16 | SW 16 | SW 16 | WSW 16 | WSW 16 | WSW 16 | WSW 16 | SW 15 | SW 15 | — | — | — | SW 16 | SW 17 | SW 16 | SW 16 | — | — | SW 16 | SSW 18 |
| kJ | 1614 | 1611 | 2844 | 2785 | 2615 | 2033 | 2128 | 2176 | 1619 | — | — | — | 5823 | 5432 | 3193 | 2443 | — | — | 3559 | 5795 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 21 | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 72 | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | WSW 15 | SW 11 | SW 15 | — | — | — | — | SW 15 | SW 13 | — | — |
| kJ | — | — | — | — | — | — | — | — | — | 1860 | 1795 | 5330 | — | — | — | — | 2038 | 1831 | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 356 | 96 | 12 | 15 | 94 | 222 | 245 | 71 | 48 | 356 | 409 | 2001 | 2001 | 44 | 12 | 1350 | 96 | 96 | 96 | 30 |
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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