Surf Forecasts:
Marengo surf forecast from 13 Sep 2026:
- Best quality surf: Thursday 17 Sep, 1AM (local time) - 8ft (2.5m), 15s period, SSW swell with cross-offshore winds.
- Most powerful swell: Tuesday 15 Sep, 10PM (local time) - 13ft (4.0m), 14s period, SW swell with 6,034 kJ wave energy.
- Next surfable swell (1★+): Monday 14 Sep, 7AM (local time) - 2.5ft (0.8m), 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 (Sep 14) at 7AM. The primary swell is predicted to be 0.8m and 14s period with a secondary swell of 0.2m and 5s. 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 14s and forecast to arrive on Tuesday (Sep 15) at 10PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 5s period and expected on Monday (Sep 14) at 7AM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Mon 14th Sep) | 2.5ft (0.8m) 14s |
| Best Surf | 1AM (Thu 17th Sep) | 8ft (2.5m) 15s |
| Most Powerful | 10PM (Tue 15th Sep) | 13ft (4.0m) 14s |
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 on offer at Marengo over the next couple of weeks.
Right off the bat, Monday morning is a bit of a nothing burger with a tiny 2.6ft SW swell and a cross-off wind. It’s there, but don’t get too excited. The real story starts to build on Tuesday the 15th of September. We’ve got a big pulse of SW groundswell coming in, jumping from 11.5ft to 13.1ft by the afternoon. That’s a lot of water moving, with combined swell energy readings of 5725 and then a massive 8096. This is proper, powerful stuff – expert territory only, especially when it’s that size. The wind is cross-off but strong, gusting 22 mph, so it’ll be raw and challenging.
That energy sticks around for Wednesday the 16th with 9.8ft of SSW swell and a solid 15-second period. The wind is a more manageable 12 mph cross-off, making it cleaner, but at that size, it’s still not for the faint-hearted. The combined energy is still very high at 3856.
Thursday the 17th sees the swell drop back to a more manageable 5.9ft to 6.6ft. The highlight of the day is Thursday afternoon: 5.9ft of SW swell, clean lines, and an offshore wind from the WSW at 12 mph. The forecast calls for very good surf conditions, and with a combined energy of 1179, there’s still plenty of push. This is the first real standout.
The best session of the entire run looks to be Friday the 18th. The morning is okay, but Friday afternoon is where it’s at. We’ve got a 6.2ft SW groundswell with a long 16-second period, groomed by a gentle 9 mph offshore from the WNW. Combined swell energy is 1874, and it’s described as excellent for experienced surfers. Marengo is a reef and point setup, so that long period will wrap in beautifully. Expect clean, powerful, well-shaped waves.
We then get a bit of a lull through the weekend, with smaller 3.6ft to 4.3ft swells and less favourable winds. The swell tries to kick again on the 21st, but it’s marred by onshore winds, making it a write-off.
Looking ahead, there are a couple of promising days in the second week. Tuesday the 22nd and Wednesday the 23rd of September both show 8.2ft and 7.5ft SW swells with long 16-second periods and offshore or cross-off winds. The Tuesday morning session, in particular, is a standout, with a 8.2ft SW swell, a light NW wind, and excellent conditions for experienced surfers. After that, the swell fades into onshore wind slop until a final, tidy pulse on Tuesday the 29th of September, offering a clean 5.2ft SW swell with a 17-second period and a solid offshore wind.
Short Range ForecastLight rain (total 6mm), mostly falling on Mon night. Very mild (max 18°C on Sun night, min 10°C on Mon night). Winds increasing (light winds from the NW on Sun night, fresh winds from the SW by Tue morning). | Days 5-7 Weather SummaryMostly dry. Warm (max 24°C on Sat afternoon, min 7°C on Thu night). Wind will be generally light. | ||||||||||||||||||
Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | ||||||||||||||
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 14 | SW 13 | SW 18 | SW 13 | SW 14 | SW 14 | SSW 15 | SSW 15 | SSW 15 | SSW 14 | SW 14 | SSW 14 | SW 18 | SW 16 | SW 14 | SW 14 | SW 13 | WSW 12 |
Wave Graph  | |||||||||||||||||||
 kJ | 355 | 218 | 173 | 91 | 3775 | 5210 | 5796 | 3835 | 3700 | 2921 | 1644 | 1179 | 1210 | 2264 | 1869 | 1109 | 588 | 444 | 527 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off | cross-off | cross-off | off | cross-off | cross-off | cross-off | cross-off |
High Tide | 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 | 8:17AM0.23m | 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 | |||||||
 |  | |  |  | | | | | |  | |  | | | | | | | |
 | — | 6:28 | — | — | 6:26 | — | — | 6:24 | — | — | 6:24 | — | — | 6:22 | — | — | 6:20 | — | — |
 | — | — | 6:13 | — | — | 6:14 | — | — | 6:15 | — | — | 6:15 | — | — | 6:16 | — | — | 6:17 | — |
mm | — | — | — | 2 | 2 | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 18 | 15 | 15 | 13 | 11 | 11 | 10 | 11 | 11 | 10 | 11 | 11 | 7 | 20 | 21 | 16 | 23 | 24 | 19 |
Feels °C | 16 | 12 | 10 | 8 | 2 | 3 | 1 | 5 | 5 | 6 | 6 | 7 | 4 | 16 | 17 | 11 | 19 | 21 | 10 |
Swell 1 Height (m) Direction Period (s) | SW 15 | SW 14 | SW 13 | SW 12 | SW 13 | SW 14 | SW 15 | SSW 15 | SSW 15 | SSW 15 | SSW 14 | SW 14 | SSW 14 | SW 18 | SW 16 | SW 14 | SW 14 | SW 13 | WSW 12 |
| kJ | 355 | 218 | 173 | 77 | 1494 | 2886 | 3477 | 3835 | 3700 | 2921 | 1644 | 1179 | 1210 | 2264 | 1869 | 1109 | 588 | 444 | 527 |
Swell 2 Height (m) Direction Period (s) | SSW 11 | SSW 10 | WSW 19 | SW 18 | SW 15 | — | — | S 16 | — | — | — | — | SW 22 | SW 18 | S 16 | S 14 | S 14 | SW 20 | WSW 18 |
| kJ | 39 | 19 | 36 | 79 | 456 | — | — | 21 | — | — | — | — | 73 | 1007 | 5 | 4 | 4 | 15 | 32 |
Swell 3 Height (m) Direction Period (s) | NE 4 | WSW 5 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 1 | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | W 5 | WSW 6 | SW 7 | SW 13 | SW 14 | SW 14 | — | — | — | — | — | — | — | — | — | N 3 | N 3 | W 3 |
| kJ | — | 43 | 14 | 91 | 3775 | 5210 | 5796 | — | — | — | — | — | — | — | — | — | 1 | 5 | 8 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 2 | 0 | 0 | 557 | 729 | 276 | 374 | 241 | 0 | 37 | 0 | 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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