
Surf Forecasts:
Marengo surf forecast from 31 Jul 2026:
- Best quality surf: Saturday 1 Aug, 1PM (local time) - 5.5ft (1.7m), 17s period, SW swell with cross-offshore winds.
- Most powerful swell: Tuesday 4 Aug, 4AM (local time) - 11ft (3.5m), 12s period, WSW swell with 3,675 kJ wave energy.
- Next surfable swell (1★+): Friday 31 Jul, 1PM (local time) - 4.5ft (1.3m), 12s period with SSW 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 Friday (Jul 31) at 1PM. The primary swell is predicted to be 1.3m and 12s period with a secondary swell of 0.3m and 21s. 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 12s and forecast to arrive on Tuesday (Aug 04) at 4AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Monday (Aug 03) at 4AM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1PM (Fri 31st Jul) | 4.5ft (1.3m) 12s |
| Best Surf | 1PM (Sat 1st Aug) | 5.5ft (1.7m) 17s |
| Most Powerful | 4AM (Tue 4th Aug) | 11ft (3.5m) 12s |
Table - best surf conditions forecast for Marengo over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s get into it for Marengo.
We’ve got a solid run of surf coming up, with the best action kicking off this Friday morning and stretching through to the end of the second week. The overall pattern is a sustained SW groundswell, with a few standout sessions that are going to be worth getting wet for.
The first real highlight slaps you right in the face on Friday, 31st July. Marengo is a reef and point setup, and it’s going to be working beautifully. The morning brings a clean 4ft SSW swell with a 12-second period. The wind is light offshore from the WNW, meaning the faces will be smooth as glass. The combined energy is moderate (544), so it’s got plenty of push for a beginner-friendly spot. The water is sitting at 58°F, which is right around the average for this time of year, so no nasty surprises on the temperature front.
Then Friday afternoon holds up just as well. The swell drops a touch to 4ft, but the wind swings to a light cross-offshore from the SW, keeping it clean. Solid.
Now, if you want the real standout of the whole forecast, look no further than Saturday, 1st August, in the afternoon. The swell jumps to 6ft from the SW, but the period is a massive 17 seconds – that’s groundswell with serious legs. The combined energy rockets up to 2787, which is strong. The wind is a light cross-offshore from the NNW. This is expert territory at 6ft with that long period. It’s going to be powerful, offering up some proper, lined-up waves at the point. This is the session to circle.
Sunday morning, 2nd August, still has a solid 6ft SW swell with a 16-second period, but the wind picks up to a moderate 12 mph cross-offshore from the north. It’s clean, but the breeze is there. The energy drops to 1510 (moderate).
Monday, 3rd August, brings a drop in size to 4ft in the morning, but the afternoon is the real story. You get a 7ft WSW swell with a 14-second period, and the wind goes straight offshore from the W at 9 mph. The energy is strong (2911). This is another one for the experienced crew.
The swell stays up through Tuesday, 4th August, with a 8ft SW swell in the morning (energy 2371), but the wind is a cross-offshore. The afternoon is a bit messier with a 16 mph cross-offshore. By Wednesday, 5th August, the swell drops right back to 2ft, but the period is a very long 19 seconds, and the wind is offshore. It’ll be clean but small.
There’s a gap of poor conditions through the middle of the second week. Friday, 7th August morning is a quick highlight: glassy conditions with no wind and a 5ft SW swell (16-second period, energy 1178). That’s a rare, perfect window, but it’s short-lived.
The real monster arrives on Monday, 10th August. The afternoon shows a massive 16ft WSW swell with a 17-second period. The combined energy is an enormous 15620. The wind is a moderate cross-offshore. This is not for the faint of heart – expert only, and even then, it’s going to be a formidable challenge. If you’re a beginner, stay well clear.
The tail end of the forecast, from Thursday, 13th August onwards, has a lot of energy but often with strong winds. Thursday morning has a 6ft SW swell (17-second period, energy 1977) with a moderate offshore from the W. That’s a solid, clean option. Friday, 14th August morning, is similar with a 8ft swell (19-second period, energy 4174) but with a fresh 19 mph offshore wind. Saturday, 15th August, wraps it up with a 6ft swell in the morning and a moderate offshore – very good conditions.
To sum it up: the best of the best is the Saturday 1st August afternoon session and the Monday 3rd August afternoon. Those are the ones you don’t miss. The crowds at Marengo can be present sometimes, so get in early for the peak windows.
Rusty.
Short Range ForecastSome drizzle, heaviest during Sun night. Very mild (max 15°C on Sat afternoon, min 8°C on Sun night). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 14mm), heaviest on Mon morning. Very mild (max 13°C on Tue morning, min 8°C on Mon morning). Wind will be generally light. | ||||||||||||||||||||
Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | |||||||||||||||
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) | SSW 12 | SW 12 | SW 12 | SW 17 | SW 17 | SW 16 | SW 16 | SW 16 | SW 15 | SW 14 | WSW 14 | SW 13 | SW 11 | SW 12 | SW 14 | SW 19 | SW 18 | SW 17 | SW 16 | SW 16 | SW 18 |
Wave Graph | |||||||||||||||||||||
496 | 428 | 347 | 663 | 1882 | 2078 | 1464 | 1155 | 949 | 659 | 1906 | 946 | 1478 | 1169 | 289 | 369 | 325 | 470 | 416 | 400 | 891 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | cross-off | cross | cross-off | cross | cross-off | cross-off | cross-off | cross-off | off | cross-off | cross-off | cross-off | cross-off | off | off | cross-off | off | cross-off | cross-off |
High Tide | 1:41PM1.64m | 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 | — | — | 7:28 | — | — | 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 | — | — | — | — | — | — | — | — | 1 | 10 | 2 | 2 | — | — | — | — | — | — | — | — | — |
Temp °C | 13 | 12 | 12 | 14 | 15 | 10 | 15 | 15 | 12 | 9 | 10 | 11 | 13 | 13 | 12 | 13 | 12 | 10 | 13 | 13 | 10 |
Feels °C | 10 | 10 | 10 | 11 | 13 | 6 | 10 | 10 | 6 | 4 | 7 | 6 | 8 | 8 | 9 | 9 | 8 | 8 | 10 | 11 | 8 |
Swell 1 Height (m) Direction Period (s) | SSW 12 | SW 12 | SW 12 | SW 17 | SW 17 | SW 16 | SW 16 | SW 16 | SW 15 | SW 14 | WSW 15 | SW 13 | SW 12 | SSW 11 | SW 14 | SSW 14 | SW 14 | SW 17 | SW 16 | SW 16 | SW 18 |
496 | 428 | 347 | 663 | 1882 | 2078 | 1464 | 1155 | 949 | 659 | 752 | 946 | 734 | 450 | 289 | 347 | 234 | 470 | 416 | 400 | 891 | |
Swell 2 Height (m) Direction Period (s) | SSW 21 | SW 20 | SW 18 | SW 12 | SW 13 | SSE 16 | SSE 16 | SE 16 | NE 4 | WSW 16 | SW 13 | SW 18 | SW 16 | SW 15 | SSW 7 | SW 19 | SW 18 | S 9 | SSW 8 | SW 19 | SW 14 |
45 | 134 | 162 | 202 | 905 | 27 | 26 | 10 | 7 | 177 | 253 | 194 | 159 | 262 | 63 | 369 | 325 | 39 | 22 | 184 | 208 | |
Swell 3 Height (m) Direction Period (s) | S 13 | S 13 | — | — | — | — | — | — | — | — | — | — | — | — | SW 21 | SSW 9 | S 9 | SW 12 | S 8 | S 8 | S 8 |
3 | 3 | — | — | — | — | — | — | — | — | — | — | — | — | 151 | 15 | 59 | 68 | 21 | 12 | 5 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | NNE 4 | NNE 4 | N 4 | NW 3 | WSW 14 | — | SW 11 | SW 12 | — | — | — | — | — | — | — |
— | — | — | — | — | — | 20 | 10 | 10 | 4 | 1906 | — | 1478 | 1169 | — | — | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 18 | 0 | 20 | 20 | 20 | 20 | 0 | 0 | 59 | 0 | 59 | 35 | 0 | 0 | 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.











