Margaret River Mouth Surf Break

Lat Long: 33.97° S 114.98° E

Margaret River Mouth Surf Forecast and Surf Report

Issued: 7 pm 31 Aug 2026 (local time)

Forecast update in  hr  min

Today's Margaret River Mouth sea temperature is
18.3°C
1.2° 

Margaret River Mouth surf forecast from 31 Aug 2026:

  • Best quality surf: Tuesday 8 Sep, 2AM (local time) - 8ft (2.4m), 17s period, SW swell with cross-offshore winds.
  • Most powerful swell: Monday 7 Sep, 8PM (local time) - 8ft (2.5m), 18s period, SW swell with 4,624 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 8 Sep, 2AM (local time) - 8ft (2.4m), 17s period with SW 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 Tuesday (Sep 08) at 2AM. The primary swell is predicted to be 2.4m and 17s period. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Margaret River Mouth in the next 16 days are 2.5m 18s and forecast to arrive on Monday (Sep 07) at 8PM. Winds are predicted to be cross-onshore at the time the swell arrives.

Wave TypeTime (AWST) & Date Wave Height & Period
Next good surf (1 star+) 2AM (Tue 8th Sep)8ft (2.4m) 17s
Best Surf 2AM (Tue 8th Sep)8ft (2.4m) 17s
Most Powerful 8PM (Mon 7th Sep)8ft (2.5m) 18s

Table - best surf conditions forecast for Margaret River Mouth over the next 16 days.


The Lowdown

Alright, mate, Rusty here. Let’s have a look at what the next couple of weeks are shaping up to be for Margaret River Mouth.

Straight off the bat, I’ll be honest with you – the start of this window is a bit of a write-off. We’ve got a solid stretch of onshores and bumpy conditions that will have you fighting the thing more than surfing it. For the first four or five days, it’s all about cross-onshore winds and lumpy, choppy lines. There’s plenty of water moving, but it’s messy. The swell energy is there, but the quality is just not. If you’re desperate, you’ll be out there, but I wouldn’t be clearing my calendar.

Now, we do have a couple of windows that look alright, but they’re not perfect. The first real glimmer comes around September 7th. We see the wind start to drop out, and by the morning of the 8th, there’s a genuine window of clean conditions. The swell drops slightly to around 7ft, but it’s a long-period SW groundswell, 16 seconds, and the wind goes glassy. That is your standout window. The energy reading is moderate (1983), but the cleanliness will make it feel much better. The river mouth will be breaking, and with that long period, it should offer some proper lines. It’s going to be a bit softer than the big days, but it’ll be surfable and not a wrestling match.

Don’t expect much on the 9th. The wind swings around to the north and chops it up again. The rest of that week is a bit of a mixed bag. The swell stays in the 5ft to 8ft range, but the wind is just never quite right. There’s another peak around the 11th-12th, but it’s onshore and messy again. We do get a long period pulse on the 9th afternoon, but it’s crossed up.

The back half of the window, from the 13th onward, the swell starts to fade. We drop down to 4ft to 6ft, and it starts to lose its juice. The energy drops right off – we’re talking weak numbers like 335 and 518. There are a couple of mornings where the wind is light, but the surf is just small and weak. It’s not going to be worth a paddle unless you’re on a longboard and just want some clean little dribblers.

So, to lay it out plainly: the best surf on offer is the morning of the 8th. It’s clean, glassy, with a solid groundswell. That’s the one. The morning of the 7th might be okay too, but the 8th is the pick. Don’t get too excited about the big days in the first week – they look more like a washing machine than a surf break. And the second week really fades into small, weak, and clean conditions, which might be perfect for a beginner or a longboarder.

The water temp is about average for this time of year, so nothing crazy there. This is a spot that is very consistent, so even when it’s not firing, there’s always something to look at. But if you can only paddle out once, make it that Tuesday morning.

Stay salty,
Rusty

Short Range Forecast

Light rain (total 2mm), mostly falling on Wed morning. Very mild (max 16°C on Thu afternoon, min 14°C on Mon night). Winds increasing (light winds from the SW on Wed night, fresh winds from the WNW by Thu afternoon).

Days 5-7 Weather Summary

Moderate rain (total 10mm), heaviest on Sat afternoon. Very mild (max 16°C on Sat morning, min 13°C on Fri morning). Winds increasing (light winds from the WSW on Fri afternoon, near gales from the WSW by Sat afternoon).

Tuesday
1
Wednesday
2
Thursday
3
Friday
4
Saturday
5
Sunday
6
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
0
1
0
0
1
2
0
0
0
0
2
0
0
0
0
2
2
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.5
WSW
16
1.4
WSW
15
1.4
SW
14
1.6
SW
14
1.7
SW
13
1.8
SW
13
1.8
SW
14
2
SW
14
1.9
SW
14
2.4
SW
12
3
SW
15
3
SW
16
2.4
SW
15
1.8
SW
14
3
SW
12
2.5
SW
13
2.4
WSW
14
2.4
WSW
15
2.2
SW
16
Wave Graph
Metric surfscale
Energy kJ
1112
840
834
1049
1027
1067
1344
1624
1426
1627
3979
4004
2392
1218
2541
2452
2064
2510
2506
Wind (km/h)
20
SW
15
WSW
15
W
25
W
25
SW
15
SSW
15
W
25
NW
35
WNW
40
WSW
25
SW
15
WSW
35
NW
50
NW
55
SW
30
SSW
20
WSW
20
WSW
15
WSW
Wind State
cross-on
cross-on
on
on
cross-on
cross-on
on
cross-on
on
cross-on
cross-on
on
cross-on
cross-on
cross-on
cross-on
cross-on
on
on
High Tide
11:30PM0.56m
10:36AM0.34m
11:53PM0.61m
00:29AM0.65m
1:32AM0.67m
4:08AM0.69m
5:50AM0.72m
Low Tide
6:57AM0.31m
3:41PM0.30m
1:51PM0.22m
1:55PM0.13m
2:23PM0.05m
2:57PM-0.00m
3:32PM-0.03m
part cloud
clear
part cloud
part cloud
light rain
part cloud
part cloud
cloud
light rain
light rain
cloud
part cloud
part cloud
light rain
light rain
part cloud
part cloud
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:39
6:37
6:37
6:35
6:33
6:33
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:00
6:00
6:01
6:01
6:02
6:04
6:04
 mm
1
1
3
2
5
Temp °C
14
14
14
15
15
15
15
15
16
15
13
13
15
16
14
14
15
15
14
Feels °C
9
10
10
10
10
10
12
11
9
7
5
9
9
7
2
3
10
10
10
  • Map Icons:
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  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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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