
Surf Forecasts:
Marengo surf forecast from 7 Sep 2026:
- Best quality surf: Wednesday 9 Sep, 1PM (local time) - 15ft (4.5m), 19s period, SW swell with cross-offshore winds.
- Most powerful swell: Wednesday 9 Sep, 1PM (local time) - 15ft (4.5m), 19s period, SW swell with 13,775 kJ wave energy.
- Next surfable swell (1★+): Monday 7 Sep, 7PM (local time) - 6ft (1.9m), 9s period with SSW swell.
Best Forecast Surf Conditions for Marengo this week:
The surf forecast for Marengo over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Sep 07) at 7PM. The primary swell is predicted to be 1.9m and 9s period with a secondary swell of 1.5m and 8s. Another secondary swell of 0.5m and 14s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Marengo in the next 16 days are 4.5m 19s and forecast to arrive on Wednesday (Sep 09) at 1PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 5s period and expected on Tuesday (Sep 08) at 7PM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7PM (Mon 7th Sep) | 6ft (1.9m) 9s |
| Best Surf | 1PM (Wed 9th Sep) | 15ft (4.5m) 19s |
| Most Powerful | 1PM (Wed 9th Sep) | 15ft (4.5m) 19s |
Table - best surf conditions forecast for Marengo over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s have a look at what’s comin’ our way at Marengo over the next couple of weeks.
First off, the water temp is sittin’ around 57°, which is pretty much bang on average for this time of year, so nothin’ wild there. We’ve got a bit of a slow start before things really fire up.
The first few days are a bit messy. Monday the 7th has some small, junky swell around 3ft from the SW with a cross-off wind, not worth paddlin’ out for. Tuesday the 8th looks a lot better – that early session is a standout. You’ve got a clean 4ft swell from the SW with a real long period of 18 seconds and a light offshore wind from the W. That’s groundswell with heaps of push, and the offshore breeze will keep it glassy. The wave energy is moderate to strong (1270), and it’s a reef and point setup, so that long period will wrap in nicely. This is easily the best call for the first week for anyone who can handle a bit of a paddle – it’s not big, but it’ll be clean and lined up.
By Wednesday the 9th, the swell jumps up to a solid 12ft from the SW, but the wind swings cross-off and gets fresh. That’s expert territory for sure. The energy is massive (15403), but it’s gonna be a handful and not for the faint of heart. Thursday holds similar size but with more cross-off wind, so the quality drops off. Friday and Saturday the 11th and 12th drop back to a more manageable 6ft to 7ft range, and Saturday morning looks absolutely magic with glassy conditions and a clean 6ft SW groundswell (15 sec period). That’s another real sweet spot for experienced surfers lookin’ for clean, lined-up waves.
There’s a bit of a lull from Sunday the 13th through Monday the 14th, with the swell droppin’ under 3ft and the wind pickin’ up. Not much on offer.
Now, lookin’ into the second week, we’ve got a couple of promising windows. Saturday the 19th afternoon is the real standout of the whole 16-day run. That’s a long way out, so take it with a grain of salt, but the numbers are huge: 15ft from the WSW, period of 15 seconds, offshore wind from the W, and wave energy through the roof (10912). This is for expert surfers only – it’s a big, powerful, clean swell point break session if it comes together.
Monday the 21st morning also has serious potential with a 10ft SW groundswell and glassy conditions – that’s a beautiful window for experienced crew, with the energy runnin’ strong (4061). The afternoon gets a bit onshore, so the morning is the pick.
Overall, for the first week, Tuesday the 8th morning and Saturday the 12th morning are your best bets for clean, surfable waves without it gettin’ too heavy. For the brave, keep an eye on Saturday the 19th afternoon – that could be the one to remember.
Rusty.
Short Range ForecastLight rain (total 3mm), mostly falling on Tue night. Very mild (max 13°C on Tue morning, min 6°C on Mon night). Winds increasing (calm on Mon night, fresh winds from the SSW by Tue night). | Days 4-6 Weather SummaryMostly dry. Very mild (max 17°C on Sat morning, min 9°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | |||||||||||||||
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 13 | SW 9 | SSW 14 | SW 18 | SW 17 | SW 16 | SW 19 | SW 18 | SSW 17 | SSW 16 | SW 16 | SSW 15 | SW 14 | SW 16 | SW 16 | SW 15 | SW 15 | SW 17 | SW 16 | SW 16 | SW 15 |
Wave Graph | |||||||||||||||||||||
193 | 695 | 862 | 881 | 1915 | 4896 | 8450 | 8053 | 8697 | 5702 | 4073 | 2411 | 1761 | 2322 | 2796 | 1650 | 1344 | 1223 | 886 | 611 | 380 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | glassy | off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off | cross-off | cross | cross | glassy | glassy | cross-off | cross-off | cross-off | cross-off |
High Tide | 8:43PM1.77m | 6:47AM1.48m | 10:19PM1.79m | 9:33AM1.43m | 11:28PM1.87m | 11:23AM1.61m | 00:17AM1.97m | 12:30PM1.85m | 00:56AM2.06m | 1:20PM2.08m | 1:32AM2.11m | 2:03PM2.25m | 2:04AM2.12m | ||||||||
Low Tide | 12:46PM0.40m | 2:34AM1.31m | 2:18PM0.59m | 4:53AM1.19m | 4:21PM0.66m | 5:54AM0.97m | 5:43PM0.62m | 6:36AM0.75m | 6:42PM0.57m | 7:11AM0.53m | 7:29PM0.53m | 7:45AM0.36m | 8:10PM0.52m | ||||||||
6:39 | — | — | 6:37 | — | — | 6:37 | — | — | 6:35 | — | — | 6:33 | — | — | 6:31 | — | — | 6:30 | — | — | |
— | 6:07 | — | — | 6:07 | — | — | 6:08 | — | — | 6:09 | — | — | 6:10 | — | — | 6:12 | — | — | 6:13 | — | |
mm | — | — | — | — | — | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 12 | 10 | 8 | 13 | 12 | 11 | 11 | 11 | 11 | 11 | 11 | 10 | 12 | 12 | 11 | 17 | 17 | 16 | 22 | 21 | 19 |
Feels °C | 6 | 5 | 5 | 8 | 6 | 5 | 4 | 4 | 6 | 7 | 7 | 8 | 9 | 9 | 8 | 15 | 15 | 14 | 18 | 17 | 13 |
Swell 1 Height (m) Direction Period (s) | SW 13 | SSW 8 | SSW 14 | SW 18 | SW 17 | SW 16 | SW 19 | SW 18 | SSW 17 | SSW 16 | SW 16 | SSW 15 | SW 14 | SW 16 | SW 16 | SW 15 | SW 15 | SW 17 | SW 16 | SW 16 | SW 15 |
193 | 353 | 862 | 881 | 1915 | 2687 | 8450 | 8053 | 8697 | 5702 | 4073 | 2411 | 1761 | 2322 | 2796 | 1650 | 1344 | 1223 | 886 | 611 | 380 | |
Swell 2 Height (m) Direction Period (s) | SSW 22 | SW 20 | SW 19 | SW 13 | — | SW 24 | — | — | — | — | — | — | — | — | S 17 | S 15 | — | S 19 | S 16 | — | — |
45 | 148 | 531 | 331 | — | 93 | — | — | — | — | — | — | — | — | 5 | 4 | — | 7 | 5 | — | — | |
Swell 3 Height (m) Direction Period (s) | SW 22 | SW 14 | SW 14 | S 8 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
73 | 46 | 346 | 58 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | SSW 7 | SW 9 | — | — | SW 4 | SW 16 | SW 16 | — | — | — | — | — | — | — | — | — | — | — | NNW 3 | NNW 3 | NNW 3 |
153 | 695 | — | — | 9 | 4896 | 6953 | — | — | — | — | — | — | — | — | — | — | — | 9 | 1 | 1 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 241 | 241 | 0 | 0 | 37 | 534 | 699 | 1213 | 527 | 241 | 130 | 0 | 0 | 123 | 18 | 0 | 0 | 0 | 20 | 20 | 51 |
Best forecast wave conditions in Cape Otway | |||||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||||
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Information about the Marengo Surf forecast
The above surf forecast table for Marengo provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Marengo can be found by selecting the local surf guide option on the grey menu. Our Marengo 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 (Marengo) 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 Marengo 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.
Marengo is 93 km (58 miles) from the city of Geelong West. If you plan a holiday in Cape Otway, look for hotels and other accommodation in Geelong West. Geelong West has rooms for a wide range of budgets as well as car hire and transport links.










