Surf Forecasts:
Marengo surf forecast from 24 Aug 2026:
- Best quality surf: Friday 28 Aug, 10AM (local time) - 5ft (1.6m), 18s period, SW swell with cross-offshore winds.
- Most powerful swell: Monday 31 Aug, 10AM (local time) - 7.5ft (2.3m), 19s period, SW swell with 3,845 kJ wave energy.
- Next surfable swell (1★+): Tuesday 25 Aug, 1PM (local time) - 4.5ft (1.3m), 13s 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 Tuesday (Aug 25) at 1PM. The primary swell is predicted to be 1.3m and 13s period with a secondary swell of 0.7m and 13s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Marengo in the next 16 days are 2.3m 19s and forecast to arrive on Monday (Aug 31) at 10AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 5s period and expected on Wednesday (Aug 26) at 1AM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1PM (Tue 25th Aug) | 4.5ft (1.3m) 13s |
| Best Surf | 10AM (Fri 28th Aug) | 5ft (1.6m) 18s |
| Most Powerful | 10AM (Mon 31st Aug) | 7.5ft (2.3m) 19s |
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 tap for Marengo. This is a reef and point set-up that handles a fair bit of swell, but you gotta pick your moments. The water’s sitting at 57°, which is about average for this time of year, so nothing weird there.
Straight up, the first couple of days are small but surfable. Monday the 24th sees a clean 5 ft SW swell with 14-second period and cross-off wind. It’s a gentle start, but the energy is there at 898, and it’ll be a nice session for a beginner or someone wanting to stretch the arms. Not a standout, but a solid entry.
The next few days drop off a bit. Tuesday and Wednesday are smaller, around 4 ft to 5 ft, but the wind stays cross-off and sometimes glassy. Nothing to write home about. Then Thursday the 27th goes glassy with a tiny 2 ft to 3 ft SW swell – that’s a longboard or cruise session, but it’s clean as a whistle.
Now, Friday the 28th is where it starts to get interesting. We’ve got a 5 ft SW swell with a seriously long 18-second period, and the energy jumps to 1518. That’s a proper groundswell. The wind is cross-off, so the reef and point will handle that long-period energy beautifully. This is the first real standout for competent surfers. It’s not huge, but the quality is there.
Saturday the 29th and Sunday the 30th stay clean with glassy mornings and small to moderate SW swell, good for a relaxed paddle. But the real firecracker comes on Monday the 31st. That morning, it’s dead calm, glassy, with a 8 ft SW swell at 19 seconds. The energy is 3845 – that’s a powerful, solid groundswell. This is for experienced surfers only. The point will be lining up beautifully if you know what you’re doing. Crowds are possible here, so get in early.
Tuesday the 1st of September stays clean with offshore wind and a dropping 5 ft SW swell, still decent. Wednesday the 2nd is okay but gets a bit messy in the PM with onshore junk.
Then hold onto your board. Thursday the 3rd of September afternoon sees a massive 15 ft WSW swell with 13-second period and clean offshore wind. The energy hits 7798 – that’s ‘exceptional for experts’ territory. That is not for the faint of heart. Only the most experienced should even think about paddling out. This is the second true standout, but it’s massive.
Friday the 4th is still big, around 13 ft dropping to 8 ft, with decent wind. The rest of the first week of September stays bumpy and big, with a 13 ft swell on the 6th and then a howling 55 km/h cross-off on the 7th with an 18 ft swell (energy 20804) – that’s just insane. That’s not surfing, that’s survival. The 8th has a 13 ft SW swell with 18-second period and fresh offshore wind, but it’s for experts only.
So, the long story short: if you’re not an expert, your window is this week and early next week. The absolute best on offer is Monday the 31st of August for a big, clean, lined-up groundswell, and Thursday the 3rd of September afternoon for the truly brave. The rest of the time, it’s either small and clean or dangerously big. Respect it.
Stay safe out there.
- Rusty.
Short Range ForecastModerate rain (total 16mm), heaviest on Mon night. Very mild (max 16°C on Mon morning, min 8°C on Wed night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Very mild (max 16°C on Fri morning, min 10°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | |||||||||||||||
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 14 | SW 14 | SW 13 | SW 13 | SW 13 | SSW 12 | SSW 12 | SSW 11 | SSW 12 | SSW 11 | SW 21 | WSW 19 | SW 18 | SW 16 | SW 16 | SW 14 | SW 14 | SW 13 | SW 18 | SW 16 | SW 15 |
Wave Graph | |||||||||||||||||||||
890 | 681 | 604 | 867 | 479 | 378 | 392 | 261 | 246 | 161 | 129 | 470 | 1501 | 1286 | 906 | 536 | 401 | 286 | 460 | 1239 | 1446 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross-on | cross-on | cross-off | cross-off | cross-off | cross-off | off | cross-off | glassy | cross-off | cross-off | cross-off | glassy | glassy | cross-off | glassy | glassy | cross-off | cross-off |
High Tide | 10:43PM1.71m | 7:14AM1.29m | 11:50PM1.81m | 10:52AM1.33m | 00:32AM1.91m | 12:05PM1.48m | 1:03AM2.01m | 12:54PM1.66m | 1:30AM2.07m | 1:34PM1.85m | 1:54AM2.10m | 2:10PM2.02m | 2:18AM2.10m | ||||||||
Low Tide | 2:08PM0.69m | 6:21AM1.29m | 4:01PM0.74m | 6:44AM1.17m | 5:21PM0.71m | 7:04AM1.03m | 6:16PM0.66m | 7:25AM0.89m | 7:00PM0.61m | 7:46AM0.73m | 7:39PM0.57m | 8:08AM0.57m | 8:14PM0.56m | ||||||||
7:00 | — | — | 6:58 | — | — | 6:58 | — | — | 6:56 | — | — | 6:54 | — | — | 6:52 | — | — | 6:52 | — | — | |
— | 5:54 | — | — | 5:55 | — | — | 5:57 | — | — | 5:58 | — | — | 5:59 | — | — | 5:59 | — | — | 6:00 | — | |
mm | — | 1 | 9 | 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 16 | 16 | 13 | 12 | 13 | 12 | 13 | 12 | 9 | 14 | 14 | 11 | 16 | 16 | 12 | 14 | 14 | 12 | 15 | 14 | 12 |
Feels °C | 13 | 14 | 11 | 10 | 11 | 8 | 8 | 8 | 7 | 13 | 12 | 8 | 12 | 13 | 11 | 13 | 13 | 11 | 13 | 12 | 10 |
Swell 1 Height (m) Direction Period (s) | SW 14 | SW 14 | SW 13 | SW 13 | SW 13 | SSW 12 | SSW 12 | SSW 11 | SSW 12 | SSW 11 | SSW 11 | WSW 13 | SW 18 | SW 16 | SW 16 | SW 14 | SW 14 | SW 13 | SW 18 | SW 16 | SW 15 |
890 | 681 | 604 | 867 | 479 | 378 | 392 | 260 | 246 | 161 | 119 | 304 | 1501 | 1286 | 906 | 536 | 401 | 286 | 460 | 1239 | 1446 | |
Swell 2 Height (m) Direction Period (s) | — | SW 20 | SW 18 | WSW 17 | SW 16 | WSW 14 | WSW 14 | SW 13 | SW 13 | WSW 12 | WSW 14 | WSW 19 | S 10 | — | — | E 9 | SW 23 | SW 21 | SSW 13 | SW 26 | SW 22 |
— | 15 | 50 | 108 | 264 | 367 | 357 | 261 | 175 | 93 | 129 | 470 | 17 | — | — | 2 | 21 | 72 | 222 | 26 | 166 | |
Swell 3 Height (m) Direction Period (s) | — | — | S 14 | S 14 | WSW 13 | — | SW 18 | — | SW 16 | SW 14 | SW 21 | S 10 | — | — | — | — | E 9 | E 9 | WSW 12 | SW 26 | SE 15 |
— | — | 4 | 16 | 147 | — | 12 | — | 90 | 74 | 113 | 50 | — | — | — | — | 1 | 2 | 57 | 26 | 9 | |
Wind waves Height (m) Direction Period (s) | N 3 | NE 4 | — | E 4 | — | SW 5 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
8 | 4 | — | 6 | — | 46 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 18 | 18 | 18 | 37 | 35 | 37 | 130 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 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.











