Surf Forecasts:
Marengo surf forecast from 11 Sep 2026:
- Best quality surf: Saturday 12 Sep, 10AM (local time) - 7ft (2.1m), 15s period, SW swell with glassy winds.
- Most powerful swell: Tuesday 15 Sep, 7PM (local time) - 13ft (4.0m), 14s period, SW swell with 6,199 kJ wave energy.
- Next surfable swell (1★+): Saturday 12 Sep, 10AM (local time) - 7ft (2.1m), 15s 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 Saturday (Sep 12) at 10AM. The primary swell is predicted to be 2.1m and 15s period. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Marengo in the next 16 days are 4.0m 14s and forecast to arrive on Tuesday (Sep 15) at 7PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 6s period and expected on Monday (Sep 14) at 10PM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10AM (Sat 12th Sep) | 7ft (2.1m) 15s |
| Best Surf | 10AM (Sat 12th Sep) | 7ft (2.1m) 15s |
| Most Powerful | 7PM (Tue 15th Sep) | 13ft (4.0m) 14s |
Table - best surf conditions forecast for Marengo over the next 16 days.
The Lowdown
Alright, this is Rusty here, looking at what’s on the cards for Marengo over the next couple of weeks.
Right off the bat, we’ve got a serious pulse of energy heading our way. It’s not for the faint-hearted. The first real action kicks off this Saturday the 12th. The surf is solid at 7ft from the SW, but it’s the period that has my heart racing – 15 seconds. That’s proper groundswell, packing a punch with a combined wave energy of 1976. The wind is glassy, dead calm from the north. The water temp is about average for this time of year. This is clean, powerful, and only for experienced surfers. Saturday afternoon holds at 6ft and stays glassy. This right here is the standout for the whole outlook – Saturday morning at Marengo is the best on offer. Sunday the 13th is a write-off in the morning with a strong 30 km/h crosswind and lumpy surf, but the afternoon cleans up nicely with a cross-off breeze and 4ft surf.
We hit a lull on Monday the 14th with small 3ft waves and weak energy, only 252, but it’s clean with an offshore wind. Not worth getting wet for unless you’re on a longboard.
Then things get heavy again. Tuesday the 15th brings a big jump – 12ft to 13ft from the SW, and the energy meters are blown out at 6294 and 8757. That's a huge amount of power. This is expert-only territory, and it comes with rain showers and a fresh cross-off breeze. Wednesday the 16th stays big, around 10ft, but the winds are a bit messier. By Thursday the 17th, we’re back to a more manageable 7ft with a clean cross-off and 1621 energy units. Good surf for the experienced crew.
After that, the size drops off into the next weekend, but keep an eye on Monday the 21st. That morning is a gem: 10ft from the SW with a 18-second period, glassy winds, and 5434 energy. Another excellent session for the advanced surfers. Tuesday the 22nd stays solid at 8ft with clean conditions. Then, Wednesday the 23rd afternoon throws up another monster – 13ft from the WSW, clean light winds, and 7827 energy. That’s a big, powerful swell that will be lining up on the point. Only experts need apply.
The final week fades back to smaller, cleaner conditions, with a nice glassy 3ft on Sunday the 27th to wrap things up.
In short: the standout is Saturday morning this week. After that, the real power shows for the experienced crew on Tuesday the 15th, Monday the 21st, and Wednesday the 23rd afternoon. If you're not an expert, wait for the cleaner, smaller days around Thursday the 17th or the very end of the outlook.
Rusty.
Short Range ForecastMostly dry. Warm (max 23°C on Sun morning, min 10°C on Fri night). Winds increasing (calm on Sat morning, fresh winds from the N by Sun morning). | Days 5-7 Weather SummaryLight rain (total 5mm), mostly falling on Mon night. Very mild (max 13°C on Mon night, min 8°C on Wed night). Winds decreasing (fresh winds from the SW on Tue afternoon, calm by Thu afternoon). | ||||||||||||||||||
Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | ||||||||||||||
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 16 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 14 | SW 13 | SW 7 | SW 14 | SW 14 | SW 14 | SSW 15 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SW 14 |
Wave Graph  | |||||||||||||||||||
 kJ | 3098 | 1976 | 1456 | 975 | 809 | 674 | 355 | 218 | 173 | 109 | 3837 | 5603 | 5715 | 3553 | 3440 | 2585 | 1621 | 1110 | 1303 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | glassy | glassy | cross | cross | cross-off | cross | off | off | off | cross-off | cross-off | cross-off | cross | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 00:56AM2.06m | 1:20PM2.08m | 1:32AM2.11m | 2:03PM2.25m | 2:04AM2.12m | 2:41PM2.36m | 2:34AM2.10m | 3:17PM2.38m | 3:03AM2.04m | 3:51PM2.34m | 3:30AM1.96m | 4:25PM2.23m | 3:55AM1.85m | ||||||
Low Tide | 7:11AM0.53m | 7:29PM0.53m | 7:45AM0.36m | 8:10PM0.52m | 8:17AM0.23m | 8:47PM0.54m | 8:47AM0.16m | 9:22PM0.59m | 9:18AM0.14m | 9:54PM0.68m | 9:47AM0.17m | 10:25PM0.79m | |||||||
 |  | | | | | | |  |  |  | | |  | |  | | | | |
 | — | 6:31 | — | — | 6:30 | — | — | 6:28 | — | — | 6:26 | — | — | 6:24 | — | — | 6:24 | — | — |
 | — | — | 6:12 | — | — | 6:13 | — | — | 6:13 | — | — | 6:14 | — | — | 6:15 | — | — | 6:15 | — |
mm | — | — | — | — | — | — | — | — | — | 1 | 2 | 2 | — | — | — | — | — | — | — |
Temp °C | 11 | 18 | 19 | 16 | 23 | 22 | 18 | 16 | 15 | 13 | 11 | 10 | 11 | 11 | 11 | 9 | 11 | 11 | 9 |
Feels °C | 7 | 17 | 18 | 11 | 19 | 19 | 16 | 14 | 11 | 9 | 3 | 2 | 3 | 6 | 6 | 5 | 7 | 8 | 7 |
Swell 1 Height (m) Direction Period (s) | SW 16 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 14 | SW 13 | SW 7 | SW 15 | SW 14 | SW 14 | SSW 15 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SW 14 |
| kJ | 3098 | 1976 | 1456 | 975 | 809 | 674 | 355 | 218 | 173 | 51 | 2457 | 3154 | 3383 | 3553 | 3440 | 2585 | 1621 | 1110 | 1303 |
Swell 2 Height (m) Direction Period (s) | S 16 | — | S 17 | — | — | NE 4 | SSW 11 | SSW 10 | WSW 19 | SW 12 | — | — | — | S 15 | — | — | — | — | — |
| kJ | 5 | — | 6 | — | — | 4 | 39 | 19 | 36 | 77 | — | — | — | 18 | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | NE 4 | SW 20 | — | SW 18 | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | 3 | 15 | — | 79 | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | NNE 3 | NNE 3 | — | WNW 4 | WSW 5 | SW 7 | SW 14 | SW 14 | SW 14 | — | — | — | — | — | — |
| kJ | — | — | — | — | 2 | 3 | — | 5 | 9 | 109 | 3837 | 5603 | 5715 | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 18 | 0 | 0 | 20 | 20 | 0 | 18 | 0 | 0 | 2 | 622 | 729 | 276 | 388 | 130 | 0 | 0 | 0 | 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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