Surf Forecasts:
Marengo surf forecast from 31 Jul 2026:
- Best quality surf: Tuesday 4 Aug, 7AM (local time) - 11ft (3.5m), 11s period, SW swell with offshore winds.
- Most powerful swell: Tuesday 4 Aug, 7AM (local time) - 11ft (3.5m), 11s period, SW swell with 3,313 kJ wave energy.
- Next surfable swell (1★+): Saturday 1 Aug, 1AM (local time) - 3.5ft (1.1m), 12s 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 (Aug 01) at 1AM. The primary swell is predicted to be 1.1m and 12s period with a secondary swell of 0.5m and 18s. 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 3.5m 11s and forecast to arrive on Tuesday (Aug 04) at 7AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 3s period and expected on Monday (Aug 03) at 4AM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Sat 1st Aug) | 3.5ft (1.1m) 12s |
| Best Surf | 7AM (Tue 4th Aug) | 11ft (3.5m) 11s |
| Most Powerful | 7AM (Tue 4th Aug) | 11ft (3.5m) 11s |
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 Marengo over the next couple of weeks.
Right off the bat, we’ve got a bit of a wait, but it’s going to be worth it. The first real action kicks off on Friday afternoon, the 31st of July. The water temp is sitting at 58°, which is about average for this time of year, so no nasty surprises there. That first session is a bit of a teaser with a 4ft SW swell and a 12-second period, and the wind is light and cross-off. It’s clean, but the energy is only moderate (565). It’s a solid start to get the wetsuit on.
Then things start to get interesting. Saturday morning, the 1st of August, the swell drops slightly to 4ft, but the period jumps to a very long 17 seconds. That’s a proper groundswell. The energy is ramping up (865), but the wind is a bit cross. The real standout, though, is Saturday afternoon. The swell pushes to 6ft from the SW, still with that long 17-second period, and the wind swings to a light cross-off, making it clean. The energy is strong (2787). This is the best early call – clean, powerful, and lined up. For the experienced crew, this is the one to aim for.
The next big highlight is way out there on Friday the 14th of August. The afternoon session is an absolute monster. We’re looking at a 15ft SW groundswell with a 13-second period and a glassy, light offshore wind. The energy is enormous (8937). This is expert territory only – that’s a big, powerful ocean. It’s a long-range call, but if it holds, it’s the biggest, cleanest swell of the whole run.
There is a lot of action in between, but it’s mixed. The period between the 2nd and the 4th of August has some solid swell (5ft to 10ft), but the wind is often moderate to fresh, and conditions are described as having a cross-chop or being marginal. The 10ft on Tuesday the 4th is big, but the wind is cross-off, not clean offshore. On the 10th of August, a 8ft WSW swell shows up with a very long 19-second period, but the wind is a strong 25 mph offshore. That’s clean, but it’ll be a battle to get out.
For the best all-rounder, keep your eyes on Saturday the 15th of August. The morning has a 7ft SW swell with a 17-second period, light cross-off wind, and strong energy (4627). The afternoon is even better: 7ft, 16-second period, and it’s glassy. That is as good as it gets for a long, clean session. Expect a crowd at Marengo for that one.
Rusty.
Short Range ForecastLight rain (total 5mm), mostly falling on Sun night. Very mild (max 15°C on Sat afternoon, min 9°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 13mm), heaviest on Mon afternoon. Very mild (max 13°C on Tue afternoon, min 7°C on Mon afternoon). Wind will be generally light. | |||||||||||||||||||
Fri 31 | Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | ||||||||||||||
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 12 | SW 12 | SW 17 | SW 17 | SW 16 | SW 16 | SW 16 | SW 15 | SW 14 | WSW 15 | SW 13 | SW 12 | SW 12 | SW 14 | SSW 14 | SW 18 | SW 17 | SW 16 | SW 16 | SW 15 |
Wave Graph  | ||||||||||||||||||||
 kJ | 428 | 347 | 663 | 1882 | 2220 | 1591 | 1281 | 949 | 813 | 372 | 2677 | 2826 | 1818 | 597 | 419 | 328 | 418 | 248 | 437 | 674 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross | cross-off | cross | cross | cross-off | cross-off | off | off | off | cross-off | cross-off | off | off | off | off | cross-off | cross-off | cross |
High Tide | 2:27AM2.23m | 2:22PM1.76m | 2:52AM2.22m | 3:01PM1.86m | 3:16AM2.17m | 3:40PM1.94m | 3:40AM2.10m | 4:19PM2.00m | 4:03AM2.02m | 5:00PM2.02m | 4:27AM1.93m | 5:46PM2.00m | ||||||||
Low Tide | 7:46PM0.49m | 8:48AM0.74m | 8:23PM0.50m | 9:11AM0.61m | 8:59PM0.53m | 9:36AM0.48m | 9:35PM0.60m | 10:01AM0.36m | 10:10PM0.69m | 10:29AM0.25m | 10:47PM0.82m | 11:00AM0.18m | 11:25PM0.97m | |||||||
 |  |  | |  | | |  |  |  | | | | | | | | | | | |
 | — | — | 7:28 | — | — | 7:26 | — | — | 7:26 | — | — | 7:24 | — | — | 7:24 | — | — | 7:22 | — | — |
 | 5:34 | — | — | 5:35 | — | — | 5:36 | — | — | 5:37 | — | — | 5:37 | — | — | 5:37 | — | — | 5:38 | — |
mm | — | — | — | — | — | — | — | 3 | 2 | 12 | 1 | — | — | — | — | — | — | — | — | — |
Temp °C | 12 | 12 | 14 | 15 | 10 | 15 | 14 | 12 | 11 | 9 | 11 | 12 | 13 | 11 | 13 | 13 | 11 | 13 | 12 | 9 |
Feels °C | 10 | 10 | 11 | 13 | 6 | 10 | 8 | 6 | 5 | 3 | 6 | 8 | 9 | 8 | 10 | 9 | 8 | 10 | 10 | 7 |
Swell 1 Height (m) Direction Period (s) | SW 12 | SW 12 | SW 17 | SW 17 | SW 16 | SW 16 | SW 16 | SW 15 | SW 14 | WSW 15 | SW 12 | SW 11 | SSW 10 | SW 14 | SSW 14 | S 7 | SW 17 | SW 16 | SW 16 | SW 15 |
| kJ | 428 | 347 | 663 | 1882 | 2220 | 1591 | 1281 | 949 | 813 | 372 | 925 | 572 | 401 | 597 | 419 | 54 | 418 | 248 | 437 | 674 |
Swell 2 Height (m) Direction Period (s) | SW 20 | SW 18 | SW 12 | SW 13 | SSE 16 | SSE 16 | E 16 | SW 19 | WSW 16 | SSW 13 | WSW 14 | SW 16 | SW 15 | SW 21 | SW 19 | SW 18 | SW 12 | SW 11 | S 8 | S 8 |
| kJ | 134 | 162 | 202 | 905 | 27 | 26 | 5 | 94 | 177 | 222 | 207 | 159 | 229 | 150 | 299 | 328 | 74 | 63 | 21 | 10 |
Swell 3 Height (m) Direction Period (s) | S 13 | — | — | — | — | — | — | NE 4 | — | S 13 | SW 17 | WSW 13 | SW 12 | SW 20 | — | SW 14 | S 8 | SSW 8 | — | — |
| kJ | 3 | — | — | — | — | — | — | 4 | — | 4 | 190 | 106 | 36 | 264 | — | 198 | 33 | 22 | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | NNE 4 | NNE 4 | NW 3 | W 8 | SW 6 | SW 13 | SW 12 | SW 12 | — | — | W 3 | — | — | — | — |
| kJ | — | — | — | — | — | 20 | 10 | 5 | 460 | 28 | 2677 | 2826 | 1818 | — | — | 3 | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 0 | 0 | 18 | 0 | 20 | 20 | 20 | 21 | 37 | 59 | 0 | 35 | 59 | 0 | 0 | 0 | 0 | 0 | 0 | 18 |
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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