
Surf Forecasts:
Marengo surf forecast from 2 Aug 2026:
- Best quality surf: Monday 3 Aug, 10PM (local time) - 13ft (4.0m), 13s period, WSW swell with offshore winds.
- Most powerful swell: Monday 3 Aug, 10PM (local time) - 13ft (4.0m), 13s period, WSW swell with 5,060 kJ wave energy.
- Next surfable swell (1★+): Monday 3 Aug, 10AM (local time) - 4.5ft (1.3m), 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 (Aug 03) at 10AM. The primary swell is predicted to be 1.3m and 14s period with a secondary swell of 0.6m and 16s. The wind is predicted to be 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 Monday (Aug 03) at 10PM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 5s period and expected on Thursday (Aug 06) at 1PM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10AM (Mon 3rd Aug) | 4.5ft (1.3m) 14s |
| Best Surf | 10PM (Mon 3rd Aug) | 13ft (4.0m) 13s |
| Most Powerful | 10PM (Mon 3rd Aug) | 13ft (4.0m) 13s |
Table - best surf conditions forecast for Marengo over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s take a look at what’s on the cards for Marengo over the next couple of weeks.
The first real action kicks off Monday morning, 3 August. We’ve got a solid 4.3 ft SW swell rolling in with a long 14-second period, and the wind is blowing offshore from the WNW at 15 mph. That’s clean, lined-up surf with moderate wave energy (913) – a nice way to start the week. Monday afternoon builds a bit, but the swell jumps to 9.8 ft from the W with a shorter 9-second period, and the wind stays fresh offshore. That’s a lot of power (2499) but the shorter period makes it a bit unruly – better for experienced surfers only.
Tuesday, 4 August, is still big but the wind swings cross-offshore, which takes the edge off the perfection. 9.8 ft SW swell at 11 seconds on Tuesday morning, dropping to 8.2 ft in the afternoon. The energy is still high (3542 and 2420), but it’s not the cleanest.
Wednesday, 5 August, is where it starts to look good again. Morning has 5.6 ft SW at 10 seconds with a gentle cross-offshore breeze – clean and fun. But the standout is Wednesday afternoon: 6.6 ft SW swell, 14-second period, and offshore wind at 12 mph. That’s excellent, powerful surf (2100) for experienced surfers, with long, clean lines.
Thursday, 6 August, drops right off – 2.3 ft to 3.0 ft with very long 16-second periods. The energy is weak (316-384), so it’s a small, slow day. Still clean, but you’ll be scratching for waves.
Friday, 7 August, is the pick of the first week. The morning is clean with 4.6 ft SW at 16 seconds, but the afternoon is glassy. The wind goes dead calm from the SW, and the swell is 3.9 ft at 15 seconds. That’s perfect, smooth conditions – you’ll be out there with a smile.
Saturday, 8 August, is a write-off. The wind cranks up from the N at 15 mph, cross-shore, and the surf is poor. Don’t bother.
Sunday, 9 August, recovers a bit with offshore winds again, but the swell is modest (3.6 ft to 4.3 ft) and the energy is moderate (489-711). It’s clean, but not exciting.
Now, the second week gets interesting. Monday, 10 August, sees a 7.2 ft SW swell at 17 seconds – that’s proper groundswell, with moderate energy (2794). The wind is cross-offshore, so it’s clean, but be aware that a 17-second period at a point/reef break like Marengo means the waves will be powerful, with long lulls between sets. Not for beginners.
Tuesday, 11 August, holds 5.9 ft to 5.6 ft SW swell, and Tuesday afternoon is a standout: offshore wind, 5.6 ft at 14 seconds, excellent quality for experienced surfers (1668).
Wednesday, 12 August, is another big day. 7.2 ft SW swell at 16 seconds in the morning, building to 6.9 ft in the afternoon with offshore wind. The energy is massive (3933) – clean, powerful, and demanding. This is expert territory.
Thursday, 13 August, is HUGE. The morning pushes 13.1 ft SW at 11 seconds (6480), and the afternoon hits 16.4 ft SW at 16 seconds (14143). That’s extreme energy. Only for the most experienced, and even then, it’s a serious challenge. The wind is cross-offshore, so it’s clean but massive.
Friday, 14 August, is a welcome drop – 5.6 ft to 5.2 ft SW at 12-13 seconds, with gentle offshore wind. Clean, fun, and manageable (915-935). Good for a lot of surfers.
Saturday, 15 August, is back to big. 9.8 ft SW at 19 seconds in the morning (6594) and 9.8 ft at 19 seconds in the afternoon with offshore wind (6433). That’s very long-period groundswell, and it’s excellent for experienced surfers, but that long period will make the waves jack up fast – best on the point.
Sunday, 16 August, is the biggest day. The morning is 14.8 ft SW at 17 seconds (18661) with cross-onshore wind – choppy and dangerous. The afternoon is 19.7 ft SW at 17 seconds (24532) – the forecast says it’s too big for this break. That’s a no-go for paddle surfing; this setup would be more interesting for kite surfers.
Monday, 17 August, is exceptional for experts. The morning has 14.8 ft WSW at 15 seconds (11599) with light cross-offshore wind, and the afternoon is 13.1 ft SW at 14 seconds (8193) – both clean and powerful. This is the true standout of the whole 16 days: big, clean
Short Range ForecastModerate rain (total 17mm), heaviest on Tue morning. Very mild (max 12°C on Sun night, min 8°C on Mon night). Mainly fresh winds. | Days 5-7 Weather SummaryMostly dry. Very mild (max 15°C on Fri morning, min 9°C on Wed night). Wind will be generally light. | ||||||||||||||||||
Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | ||||||||||||||
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 | W 9 | SW 12 | SW 11 | SW 11 | SW 11 | SW 10 | SW 14 | SW 17 | SW 16 | SW 16 | SW 18 | SW 16 | SW 15 | SW 17 | SW 16 | SW 16 | SW 15 |
Wave Graph | |||||||||||||||||||
949 | 736 | 1566 | 724 | 2228 | 1509 | 897 | 569 | 1514 | 354 | 248 | 362 | 388 | 940 | 666 | 1185 | 929 | 894 | 551 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | off | off | off | cross-off | cross-off | off | cross-off | off | off | cross-off | off | cross-off | cross-off | glassy | cross-off | cross | cross | cross |
High Tide | 3:16AM2.17m | 3:40PM1.94m | 3:40AM2.10m | 4:19PM2.00m | 4:03AM2.02m | 5:00PM2.02m | 4:27AM1.93m | 5:46PM2.00m | 4:53AM1.85m | 6:41PM1.95m | 5:22AM1.77m | 7:49PM1.89m | |||||||
Low Tide | 9:36AM0.48m | 9:35PM0.60m | 10:01AM0.36m | 10:10PM0.69m | 10:29AM0.25m | 10:47PM0.82m | 11:00AM0.18m | 11:25PM0.97m | 11:37AM0.15m | 00:09AM1.14m | 12:20PM0.18m | 1:06AM1.29m | |||||||
— | 7:26 | — | — | 7:24 | — | — | 7:24 | — | — | 7:22 | — | — | 7:22 | — | — | 7:20 | — | — | |
— | — | 5:37 | — | — | 5:37 | — | — | 5:37 | — | — | 5:38 | — | — | 5:39 | — | — | 5:40 | — | |
mm | — | 2 | 2 | 3 | 3 | 2 | 3 | 2 | — | — | — | — | — | — | — | — | — | — | 8 |
Temp °C | 12 | 11 | 11 | 10 | 11 | 12 | 11 | 11 | 12 | 11 | 13 | 13 | 11 | 15 | 14 | 11 | 14 | 13 | 11 |
Feels °C | 6 | 4 | 4 | 5 | 5 | 6 | 6 | 8 | 8 | 8 | 10 | 11 | 8 | 12 | 13 | 8 | 9 | 7 | 5 |
Swell 1 Height (m) Direction Period (s) | SW 15 | SW 14 | SW 13 | SW 12 | SW 12 | SW 11 | SW 11 | S 7 | SSW 7 | SW 17 | SW 16 | SW 16 | SW 15 | SW 16 | SW 15 | SW 17 | SW 16 | SW 16 | SW 15 |
949 | 736 | 552 | 724 | 1149 | 762 | 488 | 109 | 79 | 354 | 248 | 362 | 314 | 940 | 666 | 1185 | 929 | 894 | 551 | |
Swell 2 Height (m) Direction Period (s) | NE 4 | WSW 16 | WSW 15 | SW 18 | SW 16 | SW 15 | SW 21 | SW 15 | SW 14 | S 9 | S 8 | SSW 8 | SW 18 | SW 20 | SW 18 | — | S 8 | SE 7 | S 7 |
4 | 177 | 377 | 192 | 165 | 149 | 150 | 171 | 297 | 57 | 33 | 22 | 388 | 137 | 409 | — | 5 | 9 | 1 | |
Swell 3 Height (m) Direction Period (s) | NE 4 | — | S 14 | SSW 13 | — | — | — | SW 8 | SW 18 | SW 12 | SW 12 | E 10 | S 8 | SSW 8 | S 8 | — | — | — | — |
7 | — | 4 | 68 | — | — | — | 45 | 210 | 93 | 35 | 2 | 5 | 11 | 4 | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | NW 3 | WNW 3 | W 9 | — | SW 11 | SW 11 | SW 11 | SW 10 | SW 14 | — | W 4 | WSW 5 | — | — | — | — | — | NNE 4 | NE 5 |
5 | 6 | 1566 | — | 2228 | 1509 | 897 | 569 | 1514 | — | 19 | 23 | — | — | — | — | — | 8 | 20 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 21 | 0 | 37 | 0 | 37 | 59 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 21 | 20 | 20 | 197 |
Best forecast wave conditions in Cape Otway | |||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||
Header Global | |||||||||||||||||||
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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.











