Surf Forecasts:
Marengo surf forecast from 12 Sep 2026:
- Best quality surf: Tuesday 15 Sep, 7AM (local time) - 8ft (2.4m), 12s period, SW swell with offshore winds.
- Most powerful swell: Tuesday 15 Sep, 10AM (local time) - 13ft (4.0m), 13s period, SW swell with 5,856 kJ wave energy.
- Next surfable swell (1★+): Sunday 13 Sep, 10PM (local time) - 3ft (0.9m), 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 Sunday (Sep 13) at 10PM. The primary swell is predicted to be 0.9m and 15s period with a secondary swell of 0.5m and 11s. 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 4.0m 13s and forecast to arrive on Tuesday (Sep 15) at 10AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Thursday (Sep 17) at 7PM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Sun 13th Sep) | 3ft (0.9m) 15s |
| Best Surf | 7AM (Tue 15th Sep) | 8ft (2.4m) 12s |
| Most Powerful | 10AM (Tue 15th Sep) | 13ft (4.0m) 13s |
Table - best surf conditions forecast for Marengo over the next 16 days.
The Lowdown
Alright folks, Rusty here. We’ve got a long, 16-day window ahead, and for a reef and point set-up like Marengo, it’s a bit of a mixed bag waiting to happen. There’s no surf to start with today, so we’re looking at a blank couple of days initially.
The first real opportunity rolls in on Monday morning the 14th of September. It’s small, only 3 ft of SW swell, but with a clean offshore breeze, it’s more of a longboard cruise than a proper session. The energy is weak (212 to 250). The real story kicks off later.
Don’t get too excited about Tuesday the 15th. We’ve got a massive pulse of swell coming in at 13 ft from the SSW, but the wind is howling at 19 mph, making it a messy, rainy day. This kind of size (over 8 ft) is strictly for experts only, so don’t even think about it if you’re learning.
Now, the standout window. For experienced surfers, Thursday morning the 17th is your golden ticket. Marengo will see a solid 7 ft SSW groundswell with a 14-second period and a clean cross-off breeze. The combined energy is strong (1644), and the water is 57°F, which is pretty average for this time of year – nothing unusual there.
Looking further ahead, the run gets more promising. Head to Tuesday the 22nd of September. Marengo (Marengo) is going to be absolutely firing. We’re looking at an 8 ft SW groundswell with a very long, juicy 16-second period. The wind goes glass (3 mph from the South), so it’ll be pure, clean perfection. This is expert territory at that size. The energy (3216) is going to be pumping through that reef and point, shaping up some proper, deep barrels. That is the standout of the whole period – mark it on your calendar.
The run holds through the end of the month. Sunday the 27th has another cracker: a 7 ft SW swell with a 17-second period and a moderate offshore wind from the West. The energy is proper (2866) and conditions will be clean. Monday the 28th looks like a write-off with onshore winds.
Overall, the first week is a slow burn with a big, windy spike. The second week settles into a much better rhythm, with Tuesday the 22nd and Sunday the 27th being the days to really paddle out for. Crowds are possible at this spot, so get in early.
Stay salty.
Rusty.
Short Range ForecastLight rain (total 6mm), mostly falling on Mon night. Warm (max 23°C on Sun morning, min 10°C on Mon night). Winds increasing (light winds from the NNW on Sun night, fresh winds from the SW by Tue afternoon). | Days 4-6 Weather SummaryMostly dry. Very mild (max 19°C on Fri afternoon, min 6°C on Thu night). Mainly fresh winds. | ||||||||||||||||||||
Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | |||||||||||||||
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 15 | SW 15 | SW 15 | SW 14 | SW 13 | WSW 7 | SW 13 | SW 14 | SW 14 | SSW 15 | SW 15 | SW 15 | SSW 14 | SW 14 | SSW 14 | SW 14 | SW 16 | SW 15 | SW 14 | SW 13 | SW 13 |
Wave Graph  | |||||||||||||||||||||
 kJ | 809 | 674 | 355 | 218 | 176 | 146 | 5856 | 4292 | 5338 | 3887 | 3622 | 2736 | 1644 | 1179 | 1080 | 988 | 2201 | 1325 | 769 | 480 | 234 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | cross-off | off | off | off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off | cross-off | cross-off | cross-off | cross |
High Tide | 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 | 5:01PM2.08m | 4:19AM1.74m | 5:40PM1.92m | ||||||||
Low Tide | 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 | 10:17AM0.24m | 10:55PM0.92m | 10:47AM0.34m | 11:27PM1.05m | ||||||||
 | |  | | |  |  | |  | | | | |  |  | | | | | | | |
 | 6:30 | — | — | 6:28 | — | — | 6:26 | — | — | 6:24 | — | — | 6:24 | — | — | 6:22 | — | — | 6:20 | — | — |
 | — | 6:13 | — | — | 6:13 | — | — | 6:14 | — | — | 6:15 | — | — | 6:15 | — | — | 6:16 | — | — | 6:17 | — |
mm | — | — | — | — | — | 2 | 2 | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 23 | 21 | 19 | 16 | 15 | 13 | 11 | 10 | 10 | 11 | 11 | 10 | 11 | 11 | 7 | 17 | 19 | 15 | 23 | 23 | 20 |
Feels °C | 19 | 17 | 17 | 12 | 10 | 9 | 4 | 2 | 2 | 5 | 5 | 5 | 7 | 6 | 4 | 12 | 15 | 11 | 18 | 20 | 11 |
Swell 1 Height (m) Direction Period (s) | SW 15 | SW 15 | SW 15 | SW 14 | SW 13 | SW 8 | SW 13 | SW 14 | SW 14 | SSW 15 | SW 15 | SW 15 | SSW 14 | SW 14 | SSW 14 | SW 14 | SW 16 | SW 15 | SW 14 | SW 13 | SW 13 |
| kJ | 809 | 674 | 355 | 218 | 176 | 67 | 1204 | 2405 | 3236 | 3887 | 3622 | 2736 | 1644 | 1179 | 1080 | 988 | 2201 | 1325 | 769 | 480 | 234 |
Swell 2 Height (m) Direction Period (s) | — | ENE 4 | S 11 | S 10 | WSW 19 | SW 12 | SW 15 | — | — | S 16 | S 15 | S 15 | — | — | SW 21 | SW 18 | SW 16 | S 15 | S 13 | SW 20 | SW 17 |
| kJ | — | 2 | 59 | 17 | 36 | 77 | 456 | — | — | 19 | 4 | 5 | — | — | 18 | 635 | 1401 | 4 | 4 | 15 | 75 |
Swell 3 Height (m) Direction Period (s) | — | — | W 21 | SW 20 | — | SW 18 | — | — | — | — | — | — | — | — | — | S 14 | S 15 | — | — | — | — |
| kJ | — | — | 9 | 15 | — | 79 | — | — | — | — | — | — | — | — | — | 4 | 17 | — | — | — | — |
Wind waves Height (m) Direction Period (s) | NNE 2 | NNW 3 | — | WSW 4 | WSW 6 | WSW 7 | SW 13 | SW 14 | SW 14 | — | — | — | — | WSW 4 | — | — | — | — | — | — | NNW 3 |
| kJ | 1 | 1 | — | 2 | 14 | 146 | 5856 | 4292 | 5338 | — | — | — | — | 13 | — | — | — | — | — | — | 2 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 20 | 20 | 0 | 0 | 0 | 0 | 59 | 729 | 276 | 351 | 241 | 76 | 0 | 59 | 0 | 2 | 0 | 21 | 20 | 0 | 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.
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