
Surf Forecasts:
Marengo surf forecast from 6 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 13,445 kJ wave energy.
- Next surfable swell (1★+): Monday 7 Sep, 7PM (local time) - 5ft (1.5m), 8s 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 1.5m and 8s period with a secondary swell of 0.6m and 13s. 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 1.1m 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) | 5ft (1.5m) 8s |
| 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 cooking for Marengo over the next couple of weeks. The water temperature is about average for this time of year, nothing wild.
Right off the bat, Monday the 7th is pretty weak with small, messy 3ft SW swell and a cross-off wind, only a moderate energy (469). Not worth paddling out. The afternoon gets a bit bigger at 6ft but the period drops to 8 seconds – short-period, crumbly stuff. Energy picks up (1048) but still a marginal call.
Now, Tuesday the 8th is where things start to look interesting. The morning brings a clean 4ft SW groundswell with a long 18-second period and a clean offshore wind. The energy is solid (1272) and conditions look very good. The afternoon gets even better: 6ft SW swell, still that long 17-second period, offshore wind, and pumping energy (1774). This is excellent for experienced surfers.
Wednesday the 9th sees the swell absolutely jack up. Morning has a 13ft SW swell with a 16-second period and cross-off wind, but the energy is massive (13095). Afternoon pushes 15ft SW at 18 seconds, energy off the charts (20693). This is too big for anyone but the most experienced, and even then, it’s a beast. For most, it's a watch-and-wonder day.
Thursday the 10th drops back a bit to 12ft SSW and 10ft SSW with moderate energy (5702, 4312), still big and cross-off winds. Friday the 11th is much more manageable: 7ft to 7ft SW groundswell (14-15 secs), light cross-off breeze, clean, and strong energy (1736-2037). This is a solid, powerful day for the crew who know what they’re doing.
The real standout comes on Saturday the 12th morning. The swell is a clean 6ft from the SW, a long 15-second period, and the wind goes absolutely glassy. The energy is still high (1667) and the conditions are perfect – offshore, glassy, just beautiful. The afternoon gets a light cross-on breeze and drops off a little.
After that, the surf takes a dive. Sunday the 13th and Monday the 14th are poor – small, weak, and windy. Tuesday the 15th brings it back with a punch: 10ft SW at 14 seconds in the morning, 8ft SW at 15 seconds in the afternoon, both with solid offshore winds and big energy (3128, 3109). Excellent for experts.
Wednesday the 16th is another cracker: afternoon session has an 12ft WSW swell, 14-second period, offshore wind, and huge energy (5688). This is one of the best on offer in the whole forecast. Thursday the 17th drops back to average, and Friday the 18th sees an 12ft SW swell with cross-off wind and 11-second period – a bit jumbled.
Saturday the 19th has a consistent 7ft SW with offshore winds, but the period is shorter (11-12 seconds). Sunday the 20th is a write-off with strong winds. Monday the 21st has a 7ft SW groundswell (15 seconds) but a cross-on wind messes it up. Tuesday the 22nd offers a 6ft SW at a long 17-second period with a light cross breeze, energy (1774), but not quite clean.
If I’m calling the standouts, it’s the Tuesday morning session on the 8th for a very good clean long-period swell, and the Saturday morning on the 12th – glassy conditions and a solid 6ft groundswell is as good as it gets for the crew. Keep an eye on Wednesday the 16th afternoon for the big-wave specialists.
Rusty.
Short Range ForecastLight rain (total 3mm), mostly falling on Sun 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 5-7 Weather SummaryMostly dry. Very mild (max 18°C on Sat afternoon, min 8°C on Thu night). Wind will be generally light. | ||||||||||||||||||
Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | ||||||||||||||
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 12 | SW 13 | SSW 8 | SSW 14 | SW 18 | SW 17 | SW 16 | SW 16 | SW 18 | SSW 17 | SSW 16 | SSW 16 | SW 15 | SW 14 | SW 15 | SW 16 | SW 15 | SW 15 | SW 15 |
Wave Graph | |||||||||||||||||||
1468 | 193 | 524 | 862 | 881 | 1774 | 8434 | 6953 | 12548 | 8697 | 5702 | 4312 | 2525 | 1736 | 2037 | 2761 | 1650 | 1262 | 882 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | cross-off | glassy | off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off | cross-off | cross-off | cross-on | glassy | cross-on | cross |
High Tide | 5:37AM1.63m | 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 | |||||||
Low Tide | 00:37AM1.23m | 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 | |||||||
— | 6:39 | — | — | 6:37 | — | — | 6:37 | — | — | 6:35 | — | — | 6:33 | — | — | 6:31 | — | — | |
— | — | 6:07 | — | — | 6:07 | — | — | 6:08 | — | — | 6:09 | — | — | 6:10 | — | — | 6:12 | — | |
mm | 1 | — | — | — | — | — | 2 | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 12 | 12 | 10 | 8 | 13 | 13 | 12 | 11 | 11 | 10 | 11 | 11 | 10 | 11 | 11 | 9 | 17 | 18 | 15 |
Feels °C | 8 | 6 | 5 | 5 | 8 | 7 | 5 | 3 | 4 | 4 | 8 | 7 | 7 | 8 | 9 | 7 | 14 | 15 | 9 |
Swell 1 Height (m) Direction Period (s) | SW 12 | SW 13 | SSW 8 | SSW 14 | SW 18 | SW 17 | SW 16 | SSW 16 | SW 18 | SSW 17 | SSW 16 | SSW 16 | SW 15 | SW 14 | SW 15 | SW 16 | SW 15 | SW 15 | SW 15 |
496 | 193 | 330 | 862 | 881 | 1774 | 2212 | 3773 | 8145 | 8697 | 5702 | 4312 | 2525 | 1736 | 2037 | 2761 | 1650 | 1262 | 882 | |
Swell 2 Height (m) Direction Period (s) | — | SSW 22 | SW 20 | SW 19 | SW 13 | — | SW 24 | SW 20 | — | — | — | — | — | — | — | S 16 | S 15 | S 15 | — |
— | 45 | 148 | 531 | 331 | — | 93 | 2364 | — | — | — | — | — | — | — | 5 | 17 | 5 | — | |
Swell 3 Height (m) Direction Period (s) | — | SW 22 | SW 14 | SW 14 | S 8 | — | S 16 | S 16 | — | — | — | — | — | — | — | — | — | — | — |
— | 73 | 46 | 346 | 60 | — | 5 | 5 | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | WSW 12 | SSW 7 | SSW 8 | — | — | WSW 4 | SW 16 | SW 16 | SW 18 | — | — | — | — | — | — | — | — | — | — |
1468 | 158 | 524 | — | — | 29 | 8434 | 6953 | 12548 | — | — | — | — | — | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 374 | 241 | 0 | 0 | 0 | 83 | 644 | 1256 | 527 | 37 | 527 | 0 | 0 | 0 | 18 | 0 | 18 | 20 |
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.










