
Surf Forecasts:
Greenough River Mouth surf forecast from 10 Sep 2026:
- Best quality surf: Saturday 12 Sep, 11PM (local time) - 5.5ft (1.7m), 16s period, WSW swell with cross-offshore winds.
- Most powerful swell: Saturday 12 Sep, 5AM (local time) - 7ft (2.1m), 17s period, WSW swell with 2,642 kJ wave energy.
- Next surfable swell (1★+): Thursday 10 Sep, 2PM (local time) - 4.5ft (1.4m), 15s period with SW swell.
Best Forecast Surf Conditions for Greenough River Mouth this week:
The surf forecast for Greenough River Mouth over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Sep 10) at 2PM. The primary swell is predicted to be 1.4m and 15s period with a secondary swell of 0.4m and 24s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Greenough River Mouth in the next 16 days are 2.1m 17s and forecast to arrive on Saturday (Sep 12) at 5AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 5s period and expected on Monday (Sep 14) at 8PM.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2PM (Thu 10th Sep) | 4.5ft (1.4m) 15s |
| Best Surf | 11PM (Sat 12th Sep) | 5.5ft (1.7m) 16s |
| Most Powerful | 5AM (Sat 12th Sep) | 7ft (2.1m) 17s |
Table - best surf conditions forecast for Greenough River Mouth over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s have a look at what’s coming up for Greenough River Mouth.
We’re in a bit of a slow start, to be honest. The first few days are looking pretty average, so don’t get too excited just yet. The real action starts to build from Sunday the 13th onward.
Thursday the 10th is not worth paddling out for. We’ve got a 5ft SW groundswell with a nice long 15-second period, but the wind is a cross-off at 15 mph and the combined energy is moderate (1070). It’s just not coming together. The morning is a write-off. The afternoon cleans up a bit with lighter offshore wind, but the quality is still only so-so. Friday the 11th is even worse – a strong onshore wind and a messy 4ft swell with a very long 19-second period (1694 energy), which is going to be hard work and pretty lumpy.
Saturday the 12th is still compromised. The swell bumps up to 6ft from the SW, but it’s onshore and choppy. Not recommended for a paddle.
Now, Sunday the 13th morning is where things start to look interesting. The swell holds at 6ft from the SW with a 14-second period, and we get a clean cross-off wind from the south at 6 mph. The combined energy is strong (1426) – this is proper groundswell with good shape, and it’s clean. For an intermediate surfer, this is a solid option. The water temp is 67°, which is about average for this time of year, so nothing unusual there.
Monday the 14th morning is the standout early in the period. The swell is 7ft from the SW, 14-second period, and we have a clean cross-off from the SSE at 9 mph. The combined energy jumps to 1704. This is pushing into the bigger range, so it’s better for experienced crew, but the conditions are excellent.
Tuesday the 15th is still good but not quite as clean. We’ve got a solid 8ft SW swell, cross-off wind, and a very strong energy reading of 2119. The afternoon gets a bit cross-choppy though. Wednesday the 16th sees the swell drop to 6ft, but the wind turns onshore and messy – not worth it.
Now, from Thursday the 17th through to Friday the 18th, we hit a rough patch. Strong onshore winds and dropping swell make for poor conditions. The combined energy plummets to 601 on Friday morning – just a weak, lumpy mess. That stretch is better for staying home.
Saturday the 19th is where things get big. The morning swell is 7ft from the WSW, cross-off wind, and very strong energy (2144). The afternoon gets massive – a 10ft WSW swell with a 15-second period and a huge 3361 energy reading. The wind is a cross-off at 19 mph, but the swell is too big for this break. Only for experts, and even then, it’s on the limit.
Sunday the 20th morning is another excellent window for experienced surfers. A clean 7ft WSW swell with light cross-off winds and strong energy (1594). The conditions are near-perfect, but it’s big.
Then Monday the 21st throws out a monster. The morning has a 7ft SW swell with a very long 18-second period (3287 energy), but the wind is cross-shore and choppy. The afternoon is insane – an 12ft SW swell with a 17-second period and a massive 11893 combined energy. That’s not a paddle session; that’s a survival mission. The break is simply too big.
Tuesday the 22nd is still huge, 10ft SW swell, but cleaner with a cross-off wind. Again, only for the brave. The rest of the week into the 25th stays solid, with 7ft to 7ft SW swells and offshore or cross-off winds, but the swell is still on the big side. The morning of the 25th looks clean with an offshore ESE wind, but it’s still in the 7ft range.
Best on offer: Monday the 14th morning is the true standout for the experienced crew – clean, solid groundswell, and great energy. For the overall best quality without the massive size, Sunday the 13th morning is your call, with clean lines and a manageable 6ft.
Stay safe out there.
– Rusty
Short Range ForecastMostly dry. Warm (max 24°C on Thu afternoon, min 14°C on Thu morning). Winds decreasing (fresh winds from the ENE on Thu night, light winds from the SSE by Sat night). | Days 4-6 Weather SummaryMostly dry. Very mild (max 19°C on Tue afternoon, min 13°C on Sun night). Winds decreasing (fresh winds from the S on Mon afternoon, calm by Tue night). | ||||||||||||||||||||
Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | |||||||||||||||
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) | SW 15 | SW 15 | SW 15 | WSW 15 | SW 19 | WSW 18 | SW 16 | WSW 16 | SW 16 | SW 14 | SW 15 | SW 16 | SW 14 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 | SW 14 | SW 17 | SW 16 |
Wave Graph | |||||||||||||||||||||
979 | 773 | 695 | 720 | 1077 | 2490 | 1714 | 1498 | 1412 | 1426 | 1506 | 1904 | 1704 | 1801 | 2055 | 2119 | 1999 | 1624 | 1273 | 1927 | 1420 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | off | cross-off | cross-on | on | on | on | cross-on | cross-off | cross-off | cross-off | off | cross-off | cross-off | cross-off | cross-off | cross | cross | on | cross-on | glassy |
High Tide | 9:37AM0.77m | 10:23PM0.54m | 10:19AM0.71m | 10:37PM0.60m | 10:57AM0.63m | 10:56PM0.65m | 11:31AM0.55m | 11:18PM0.70m | 12:02PM0.46m | 11:42PM0.73m | 12:29PM0.39m | 00:09AM0.75m | 9:05AM0.34m | 00:40AM0.75m | |||||||
Low Tide | 4:20PM0.31m | 3:39AM0.36m | 4:34PM0.35m | 4:28AM0.32m | 4:40PM0.38m | 5:15AM0.31m | 4:33PM0.40m | 6:03AM0.31m | 3:39PM0.38m | 6:53AM0.32m | 3:21PM0.34m | 7:55AM0.34m | 3:26PM0.30m | ||||||||
6:26 | — | — | 6:24 | — | — | 6:24 | — | — | 6:22 | — | — | 6:20 | — | — | 6:20 | — | — | 6:18 | — | — | |
— | 6:10 | — | — | 6:10 | — | — | 6:12 | — | — | 6:12 | — | — | 6:13 | — | — | 6:13 | — | — | 6:14 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 19 | 24 | 21 | 22 | 21 | 19 | 20 | 20 | 18 | 18 | 18 | 17 | 18 | 18 | 17 | 18 | 19 | 18 | 20 | 20 | 18 |
Feels °C | 14 | 22 | 18 | 19 | 18 | 18 | 19 | 18 | 18 | 17 | 15 | 14 | 15 | 13 | 12 | 15 | 16 | 16 | 20 | 19 | 19 |
Swell 1 Height (m) Direction Period (s) | SW 15 | SW 15 | SW 15 | WSW 15 | SW 19 | WSW 18 | SW 16 | WSW 16 | SW 16 | SW 14 | SW 15 | SW 16 | SW 14 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 | SW 14 | SW 17 | SW 16 |
979 | 773 | 695 | 720 | 1077 | 2490 | 1714 | 1498 | 1412 | 1426 | 1506 | 1904 | 1704 | 1801 | 2055 | 2119 | 1999 | 1624 | 1273 | 1927 | 1420 | |
Swell 2 Height (m) Direction Period (s) | SW 24 | SW 24 | SW 22 | SW 21 | SW 14 | — | W 5 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
91 | 141 | 290 | 355 | 606 | — | 11 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | E 4 | — | ENE 3 | — | WNW 4 | — | — | — | — | — | — | S 4 | — | SSW 5 | SSW 6 | — | — | — | — | — | — |
10 | — | 10 | — | 11 | — | — | — | — | — | — | 14 | — | 47 | 92 | — | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 6 | 0 | 135 | 7 | 610 | 720 | 332 | 742 | 0 | 0 | 742 | 0 | 0 | 520 | 53 | 243 | 503 | 11 | 520 | 520 | 0 |
Best forecast wave conditions in North West WA | |||||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||||
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Information about the Greenough River Mouth Surf forecast
The above surf forecast table for Greenough 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 Greenough River Mouth can be found by selecting the local surf guide option on the grey menu. Our Greenough 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 (Greenough 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 Greenough 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.










