Surf Forecasts:
Marengo surf forecast from 30 Aug 2026:
- Best quality surf: Thursday 3 Sep, 1PM (local time) - 18ft (5.5m), 13s period, SW swell with offshore winds.
- Most powerful swell: Thursday 3 Sep, 1PM (local time) - 18ft (5.5m), 13s period, SW swell with 9,985 kJ wave energy.
- Next surfable swell (1★+): Sunday 30 Aug, 4PM (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 Sunday (Aug 30) at 4PM. The primary swell is predicted to be 1.9m and 14s period with a secondary swell of 0.3m and 20s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Marengo in the next 16 days are 5.5m 13s and forecast to arrive on Thursday (Sep 03) at 1PM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 3s period and expected on Tuesday (Sep 01) at 7PM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4PM (Sun 30th Aug) | 6ft (1.9m) 14s |
| Best Surf | 1PM (Thu 3rd Sep) | 18ft (5.5m) 13s |
| Most Powerful | 1PM (Thu 3rd Sep) | 18ft (5.5m) 13s |
Table - best surf conditions forecast for Marengo over the next 16 days.
The Lowdown
Alright, folks, Rusty here. Let’s have a look at what’s cooking for us over the next couple of weeks.
We’ve got one spot on the radar, and it’s a classic reef and point set-up that likes a solid SSW swell. The water temp is sitting at 57°, which is about average for this time of year, so nothing too wild there.
The surf kicks off straight away this Sunday the 30th of August. We’ve got a solid SW groundswell, 6 ft, with a 14-second period, and the wind is offshore. That’s clean, organised surf. The combined energy is moderate to strong (1350), so there’s real push behind it. Monday morning the 31st looks even better – the wind goes very light offshore, almost glassy, and the swell is still a nice 6 ft but with a 15-second period, giving it that extra punch. Afternoon turns glassy. This is prime stuff.
Now, Tuesday the 1st of September drops off a bit. The swell is still there but the wind gets a bit cross-off and fresh, and the energy drops. Wednesday the 2nd, we’re back into it with a clean 6 ft, 16-second groundswell in the morning. The afternoon pushes up to 7 ft, which is starting to get a bit more serious.
Here’s where it gets interesting. By Thursday the 3rd of September, the afternoon brings a massive pulse – we’re talking 18 ft of SW swell with a 14-second period and a wind that’s fresh offshore. The combined energy goes through the roof (13297). That’s big, powerful, and only for the well-experienced crew. This is a standout, but it’s a beast.
Friday the 4th, that big swell drops back to a more manageable 10 ft in the morning, but the wind is cross-off, so not as clean. The afternoon looks better with a light cross-shore breeze, but the swell is still 8 ft, so it’s head-high plus.
The following week shows a bit of a lull, but there are some gems. Tuesday the 8th of September, we’ve got another solid pulse: 10 ft in the morning, 12 ft in the afternoon, with a 17-second period on the afternoon. That’s a very long-period groundswell. The wind is offshore, so it’s clean, but the size and power mean it’s one for the experts, especially on a reef and point. The swell direction is SW, which is spot on for the break.
Looking further out, Friday the 11th of September, the morning is glassy with a 5 ft, 19-second swell. That’s an incredibly long period, which will produce some beautifully shaped, powerful lines, but it’ll be a bit fat and walled up on a beach break. Here at the point, it’ll be a dream. The energy is moderate (2500), and the conditions are perfect.
There’s a bit of a quiet spell around the 14th, with smaller swells and cross-shore winds, but the outlook is generally optimistic. All in all, the standout is that Thursday afternoon pulse on the 3rd of September for the big-wave hunters, and the Monday morning on the 31st of August for some clean, fun-sized waves.
Stay stoked.
Rusty
Short Range ForecastLight rain (total 5mm), 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 4-6 Weather SummaryModerate rain (total 14mm), heaviest on Fri night. Very mild (max 18°C on Fri afternoon, min 8°C on Thu night). Winds increasing (light winds from the NNW on Thu night, strong winds from the NNW by Fri night). | ||||||||||||||||||||
Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | |||||||||||||||
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 14 | SW 14 | SW 14 | SW 15 | SW 14 | SW 16 | SW 16 | SW 15 | WSW 14 | WSW 16 | SW 15 | SW 15 | WSW 13 | WSW 14 | SW 15 | SW 15 | SW 15 | SW 15 | SW 14 | SW 11 | SW 15 |
Wave Graph | |||||||||||||||||||||
1196 | 1330 | 1349 | 1325 | 1289 | 1953 | 1041 | 696 | 3618 | 5168 | 1753 | 2140 | 8924 | 9445 | 4363 | 3237 | 2525 | 1808 | 2119 | 3370 | 1229 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | off | glassy | cross | cross-off | cross-off | off | off | cross-off | cross-off | off | off | cross-off | cross-off | cross-off | cross-off | off | cross-off | off |
High Tide | 2:10PM2.02m | 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 | 8:14PM0.56m | 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 | ||||||||
6:52 | — | — | 6:50 | — | — | 6:48 | — | — | 6:47 | — | — | 6:46 | — | — | 6:43 | — | — | 6:43 | — | — | |
— | 6:00 | — | — | 6:00 | — | — | 6:01 | — | — | 6:02 | — | — | 6:04 | — | — | 6:05 | — | — | 6:06 | — | |
mm | — | — | — | — | — | — | — | 4 | 1 | — | — | 1 | — | — | — | — | 1 | 12 | 2 | 1 | — |
Temp °C | 12 | 12 | 10 | 12 | 12 | 12 | 19 | 19 | 14 | 14 | 13 | 13 | 13 | 13 | 10 | 17 | 18 | 14 | 12 | 12 | 11 |
Feels °C | 8 | 8 | 8 | 10 | 11 | 8 | 13 | 14 | 9 | 9 | 9 | 7 | 7 | 7 | 6 | 14 | 14 | 7 | 5 | 5 | 6 |
Swell 1 Height (m) Direction Period (s) | SW 14 | SW 14 | SW 14 | SW 15 | SW 14 | SW 16 | SW 16 | SW 15 | SW 14 | SW 16 | SW 15 | SW 15 | SW 12 | SW 14 | SW 15 | SW 15 | SW 15 | SW 15 | SW 14 | SW 15 | SW 15 |
1196 | 1330 | 1349 | 1325 | 1289 | 1953 | 1041 | 696 | 658 | 1410 | 1753 | 2140 | 1341 | 3331 | 4363 | 3237 | 2525 | 1808 | 2119 | 2418 | 1229 | |
Swell 2 Height (m) Direction Period (s) | SW 20 | SW 20 | — | SW 20 | SW 18 | — | — | NE 5 | SW 17 | — | S 16 | — | SSW 14 | — | S 15 | S 14 | — | — | — | SSW 12 | SSW 12 |
136 | 61 | — | 373 | 710 | — | — | 8 | 293 | — | 5 | — | 501 | — | 17 | 15 | — | — | — | 333 | 774 | |
Swell 3 Height (m) Direction Period (s) | S 15 | S 15 | — | S 14 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | WSW 20 |
18 | 17 | — | 4 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 75 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | NNW 3 | NNW 3 | WSW 14 | WSW 16 | — | — | WSW 13 | WSW 14 | — | — | — | N 3 | W 3 | SW 11 | — |
— | — | — | — | — | — | 2 | 5 | 3618 | 5168 | — | — | 8924 | 9445 | — | — | — | 5 | 8 | 3370 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 0 | 22 | 21 | 0 | 0 | 21 | 35 | 37 | 59 | 2 | 21 | 18 | 20 | 21 | 76 | 570 |
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.











