Surf Forecasts:
Marengo surf forecast from 30 Aug 2026:
- Best quality surf: Saturday 5 Sep, 4PM (local time) - 18ft (5.5m), 15s period, SW swell with offshore winds.
- Most powerful swell: Saturday 5 Sep, 7PM (local time) - 23ft (7.0m), 16s period, SW swell with 23,525 kJ wave energy.
- Next surfable swell (1★+): Monday 31 Aug, 1AM (local time) - 6ft (1.9m), 14s period with SW 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 (Aug 31) at 1AM. The primary swell is predicted to be 1.9m and 14s period. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Marengo in the next 16 days are 7.0m 16s and forecast to arrive on Saturday (Sep 05) at 7PM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 4s period and expected on Saturday (Sep 05) at 4AM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Mon 31st Aug) | 6ft (1.9m) 14s |
| Best Surf | 4PM (Sat 5th Sep) | 18ft (5.5m) 15s |
| Most Powerful | 7PM (Sat 5th Sep) | 23ft (7.0m) 16s |
Table - best surf conditions forecast for Marengo over the next 16 days.
The Lowdown
Alright, pal, Rusty here again. Let’s break it down in feet and degrees.
The water’s sitting at 57°F, which is average for this time of year.
We’re in for a slow start, but once the swell gets going, Marengo will be the place to be. First proper surf is Sunday the 30th of August: a solid 6ft SW groundswell with a 14-second period, and the combined energy is a strong 1407. Winds are offshore from the WSW, keeping it clean. This is expert territory.
Monday the 31st keeps the 6ft SW swell, and the wind goes glassy on Monday afternoon – perfect.
The biggest highlight is Thursday the 3rd of September. Thursday morning throws a massive 18ft WSW swell (13-second period) with a fresh offshore wind. Wave energy is a massive 12700 (very strong). Afternoon is even better: 18ft SW, 14 seconds, with a moderate offshore. This is the session of the forecast.
Friday the 4th drops to 8ft, but still clean. Saturday the 5th gets wild again with another 18ft WSW swell, but the wind is a strong 45 km/h offshore – clean but brutal to paddle into. Experts only.
From Sunday the 6th onward, it’s consistent 7ft to 10ft SW groundswells, with long periods from 15 to 18 seconds. The 10th of September is another absolute standout: 18ft WSW swell, glassy calm, and a combined energy of 19698 (very strong). That’s a world-class day for the experts.
The 13th of September has a 10ft SW swell with a 19-second period – very long period groundswell. This will be a dream for the point break at Marengo, with long, clean, well-shaped waves.
Marengo is the only game in town, and it’s a good one. Best days are Thursday the 3rd and Thursday the 10th of September.
Rusty.
Short Range ForecastLight rain (total 7mm), mostly falling on Tue afternoon. Very mild (max 19°C on Tue morning, min 8°C on Sun night). Winds increasing (calm on Mon afternoon, fresh winds from the NNW by Tue morning). | Days 5-7 Weather SummaryModerate rain (total 14mm), heaviest on Fri night. Very mild (max 17°C on Fri afternoon, min 8°C on Thu night). Winds increasing (light winds from the NW on Thu night, strong winds from the W by Sat morning). | ||||||||||||||||||
Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | ||||||||||||||
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 14 | SW 15 | SW 14 | SW 16 | SW 16 | SW 15 | SW 15 | SW 16 | SW 16 | SW 14 | WSW 13 | WSW 14 | SW 15 | SW 16 | SW 16 | SW 15 | SW 13 | SW 15 | SW 15 |
Wave Graph  | |||||||||||||||||||
 kJ | 1349 | 1325 | 1289 | 1953 | 1041 | 686 | 757 | 952 | 1592 | 1983 | 9383 | 13091 | 4223 | 4327 | 3772 | 2502 | 7524 | 12920 | 4284 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | glassy | cross-off | cross-off | cross-off | off | off | cross-off | cross-off | off | off | cross-off | cross-off | cross-off | cross-off | off | off | off |
High Tide | 2:18AM2.10m | 2:45PM2.16m | 2:42AM2.08m | 3:20PM2.25m | 3:05AM2.04m | 3:56PM2.28m | 3:30AM1.99m | 4:34PM2.25m | 3:56AM1.93m | 5:16PM2.15m | 4:24AM1.85m | 6:06PM2.01m | |||||||
Low Tide | 8:31AM0.41m | 8:49PM0.57m | 8:57AM0.27m | 9:22PM0.62m | 9:24AM0.14m | 9:55PM0.70m | 9:54AM0.07m | 10:28PM0.82m | 10:27AM0.05m | 11:03PM0.95m | 11:05AM0.10m | 11:43PM1.09m | |||||||
 |  | | |  |  |  | | | | | | | |  | | | |  | |
 | — | 6:50 | — | — | 6:48 | — | — | 6:47 | — | — | 6:46 | — | — | 6:43 | — | — | 6:43 | — | — |
 | — | — | 6:00 | — | — | 6:01 | — | — | 6:02 | — | — | 6:04 | — | — | 6:05 | — | — | 6:06 | — |
mm | — | — | — | — | — | 4 | 3 | — | — | 1 | — | — | — | — | — | 10 | 2 | 1 | — |
Temp °C | 9 | 13 | 11 | 13 | 19 | 19 | 14 | 13 | 13 | 13 | 13 | 12 | 11 | 16 | 17 | 14 | 12 | 11 | 11 |
Feels °C | 6 | 11 | 10 | 8 | 14 | 14 | 10 | 7 | 8 | 7 | 5 | 6 | 6 | 11 | 14 | 7 | 3 | 1 | 4 |
Swell 1 Height (m) Direction Period (s) | SW 14 | SW 15 | SW 14 | SW 16 | SW 16 | SW 15 | SW 15 | SW 16 | SW 16 | SW 14 | SW 14 | SW 15 | SW 15 | SW 16 | SW 16 | SW 15 | SW 14 | SW 15 | SW 15 |
| kJ | 1349 | 1325 | 1289 | 1953 | 1041 | 686 | 757 | 952 | 1592 | 1983 | 2490 | 3695 | 4223 | 4327 | 3772 | 2502 | 4062 | 7575 | 4284 |
Swell 2 Height (m) Direction Period (s) | — | SW 20 | SW 18 | — | — | NNE 4 | SW 18 | SW 6 | — | S 16 | S 15 | — | S 15 | — | — | — | — | — | S 16 |
| kJ | — | 373 | 710 | — | — | 1 | 118 | 32 | — | 21 | 18 | — | 18 | — | — | — | — | — | 19 |
Swell 3 Height (m) Direction Period (s) | — | S 14 | — | — | — | NE 4 | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | 4 | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | N 3 | NW 3 | — | — | — | — | WSW 13 | WSW 14 | — | — | — | — | SW 13 | SW 15 | — |
| kJ | — | — | — | — | 2 | 2 | — | — | — | — | 9383 | 13091 | — | — | — | — | 7524 | 12920 | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 563 | 454 | 0 | 0 | 21 | 35 | 59 | 59 | 21 | 21 | 20 | 565 | 900 | 1054 | 0 |
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.
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