Surf Forecasts:
Marengo surf forecast from 28 Aug 2026:
- Best quality surf: Monday 31 Aug, 7PM (local time) - 7ft (2.1m), 17s period, SW swell with glassy winds.
- Most powerful swell: Monday 31 Aug, 7PM (local time) - 7ft (2.1m), 17s period, SW swell with 2,523 kJ wave energy.
- Next surfable swell (1★+): Friday 28 Aug, 10PM (local time) - 5ft (1.5m), 16s 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 Friday (Aug 28) at 10PM. The primary swell is predicted to be 1.5m and 16s period. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Marengo in the next 16 days are 2.1m 17s and forecast to arrive on Monday (Aug 31) at 7PM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Tuesday (Sep 01) at 10AM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Fri 28th Aug) | 5ft (1.5m) 16s |
| Best Surf | 7PM (Mon 31st Aug) | 7ft (2.1m) 17s |
| Most Powerful | 7PM (Mon 31st Aug) | 7ft (2.1m) 17s |
Table - best surf conditions forecast for Marengo over the next 16 days.
The Lowdown
Alright, Rusty here, let’s talk about what’s coming down the line at Marengo.
This forecast is looking pretty solid for a while, with a real nice run of clean, offshore conditions kicking off this weekend. Water temp is sitting at 57° right now, which is about average for this time of year, so no major surprises there.
First up, we’ve got a good window starting Saturday morning, the 29th of August. The swell is a clean 4ft from the southwest with a 14-second period, and it’ll be glassy with a gentle offshore breeze. That’s going to be clean as a whistle and a great option for a wide range of surfers. The energy levels are moderate (736), so there’s enough push without it being a grunt. Saturday afternoon sees the swell bump up to 7ft from the southwest, period still 14 seconds, and the wind stays offshore moderate. The energy jumps right up (2220), and while it’s getting into the size where it’s more for experienced surfers, the conditions are excellent.
The standout window here is actually Monday the 31st of August. You’ve got a 6ft southwest swell with a long 15-second period, light offshore wind from the west at 6 mph in the morning, and the energy is strong (1698). This is a reef and point break, so that longer-period groundswell is going to wrap in and set up real nice. The offshore wind will keep it clean and lined up. Morning is the pick for the best shape and easiest paddling between sets. The afternoon stays just as good with a 6ft swell (14-second period) and cross-off wind that still keeps it clean.
There’s a bit of a stretch from the 1st of September through the 3rd where the wind gets a little funky with cross-off breezes and the quality drops into the marginal zone, but we pick it back up on the 4th of September. Friday the 4th afternoon has a proper pulse: 8ft from the southwest, 15-second period, moderate offshore wind, and huge energy (2536). That’s an expert-only day with that size, but the conditions are excellent.
Heads up for the weekend of the 6th and 7th of September – the swell gets big and raw. Sunday the 6th afternoon is pushing 13ft from the WSW with a short 12-second period and fresh offshore wind, energy is massive (5793). That’s biggest on offer, but it’s a beast and the wind is strong, so it’s really only for the experienced crew, and the period is shorter so it might be a bit chunky.
Looking further out, the 11th of September morning is a real standout too. You’ve got a 8ft southwest swell, a very long 16-second period, gentle offshore breeze from the WNW at 9 mph, and massive energy (3870). At a point and reef break like Marengo, that kind of long-period groundswell with offshore wind is going to produce some absolute gems. Clean, powerful, and well-shaped.
The final day on the 12th of September afternoon is a beautiful note to end on – the swell drops to 5ft from the southwest, still a nice 16-second period, and the wind goes glassy from the NNW at just 3 mph. That’s about as good as it gets for a clean, relaxed session.
Overall, the first week has the most reliable standouts, especially Monday the 31st and Friday the 4th. The second week has some serious size and promise, but like any long-range call, take it with a pinch of salt. Crowds are possible here now and then, but with this consistent run of clean conditions, it’s well worth checking.
Stay frothy.
Rusty
Short Range ForecastMostly dry. Very mild (max 13°C on Mon morning, min 7°C on Fri night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 2mm), mostly falling on Tue afternoon. Warm (max 20°C on Tue afternoon, min 10°C on Mon afternoon). Wind will be generally light. | |||||||||||||||||||
Fri 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | ||||||||||||||
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 16 | SW 16 | SW 14 | SW 14 | SW 13 | SW 14 | SW 14 | SW 14 | SW 15 | SW 14 | SW 16 | SW 16 | SW 15 | SW 14 | SW 16 | SW 15 | SW 15 | SW 15 | SW 14 | SW 14 |
Wave Graph | ||||||||||||||||||||
1436 | 1101 | 736 | 1558 | 732 | 1214 | 1349 | 1349 | 1325 | 1179 | 1953 | 1494 | 859 | 833 | 1164 | 1363 | 1547 | 1526 | 1484 | 1343 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | off | off | off | off | off | off | off | off | cross-off | cross-off | cross-off | cross-off | cross-off | off | off | cross-off | cross-off | cross-off | off |
High Tide | 1:30AM2.07m | 1:34PM1.85m | 1:54AM2.10m | 2:10PM2.02m | 2:18AM2.10m | 2:45PM2.16m | 2:42AM2.08m | 3:20PM2.25m | 3:05AM2.04m | 3:56PM2.28m | 3:30AM1.99m | 4:34PM2.25m | 3:56AM1.93m | |||||||
Low Tide | 7:00PM0.61m | 7:46AM0.73m | 7:39PM0.57m | 8:08AM0.57m | 8:14PM0.56m | 8:31AM0.41m | 8:49PM0.57m | 8:57AM0.27m | 9:22PM0.62m | 9:24AM0.14m | 9:55PM0.70m | 9:54AM0.07m | 10:28PM0.82m | |||||||
— | — | 6:52 | — | — | 6:52 | — | — | 6:50 | — | — | 6:48 | — | — | 6:47 | — | — | 6:46 | — | — | |
5:59 | — | — | 5:59 | — | — | 6:00 | — | — | 6:00 | — | — | 6:01 | — | — | 6:02 | — | — | 6:04 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 | — | — | — | — | 4 | 11 |
Temp °C | 12 | 8 | 12 | 12 | 10 | 12 | 11 | 9 | 13 | 13 | 12 | 19 | 20 | 14 | 15 | 15 | 11 | 17 | 12 | 11 |
Feels °C | 8 | 5 | 8 | 8 | 7 | 8 | 7 | 7 | 11 | 11 | 7 | 15 | 16 | 10 | 10 | 11 | 8 | 11 | 6 | 4 |
Swell 1 Height (m) Direction Period (s) | SW 16 | SW 16 | SW 14 | SW 14 | SW 13 | SW 14 | SW 14 | SW 14 | SW 15 | SW 14 | SW 16 | SW 16 | SW 15 | SW 14 | SW 16 | SW 15 | SW 15 | SW 15 | SW 14 | SW 14 |
1436 | 1101 | 736 | 641 | 732 | 1214 | 1349 | 1349 | 1325 | 1179 | 1953 | 1494 | 859 | 833 | 1164 | 1363 | 1547 | 1526 | 1484 | 1343 | |
Swell 2 Height (m) Direction Period (s) | SE 10 | — | — | SW 23 | WSW 13 | SW 20 | SW 20 | — | SW 20 | SW 18 | S 15 | S 16 | NNE 4 | SW 18 | S 10 | — | S 16 | — | — | — |
4 | — | — | 21 | 116 | 136 | 61 | — | 373 | 710 | 5 | 5 | 6 | 118 | 2 | — | 5 | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | E 9 | SW 21 | S 15 | S 15 | — | — | S 15 | — | — | — | — | — | — | — | — | — | — |
— | — | — | 2 | 72 | 17 | 17 | — | — | 4 | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | SW 14 | — | — | — | — | — | — | — | N 4 | NW 3 | — | — | — | — | — | — | — |
— | — | — | 1558 | — | — | — | — | — | — | — | 12 | 2 | — | — | — | — | — | — | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 182 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 20 | 20 | 21 | 0 | 0 | 0 | 35 | 570 | 534 |
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.











