Surf Forecasts:
Marengo surf forecast from 29 Aug 2026:
- Best quality surf: Thursday 3 Sep, 4PM (local time) - 16ft (5.0m), 14s period, SW swell with offshore winds.
- Most powerful swell: Thursday 3 Sep, 4PM (local time) - 16ft (5.0m), 14s period, SW swell with 9,079 kJ wave energy.
- Next surfable swell (1★+): Sunday 30 Aug, 1AM (local time) - 4.5ft (1.4m), 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 Sunday (Aug 30) at 1AM. The primary swell is predicted to be 1.4m and 14s period with a secondary swell of 0.6m and 13s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Marengo in the next 16 days are 5.0m 14s and forecast to arrive on Thursday (Sep 03) at 4PM. 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 4s period and expected on Friday (Sep 04) at 10PM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Sun 30th Aug) | 4.5ft (1.4m) 14s |
| Best Surf | 4PM (Thu 3rd Sep) | 16ft (5.0m) 14s |
| Most Powerful | 4PM (Thu 3rd Sep) | 16ft (5.0m) 14s |
Table - best surf conditions forecast for Marengo over the next 16 days.
The Lowdown
Alright folks, Rusty here, and I’ve been staring at the charts for Marengo. This is a proper reef and point setup just south of the corner, and it’s about to get very, very interesting. Water temps are sitting around 57° right now, which is about normal for the time of year, so no surprises there.
The pattern starts this Saturday the 29th, and we’re straight into a solid run. Saturday afternoon, we’ve got a clean 7 ft SW groundswell rolling in with a 14-second period. The combined energy reading is a hefty 2220, so there’s plenty of power in the water. The wind is WSW and offshore, keeping the surface glassy. It’s a bit of a beast for the average surfer, but for experienced crew, it’s a green light. Sunday the 30th keeps it going with morning and afternoon sessions both looking clean and around 6 ft to 6 ft from the SW. The energy is still strong, and the gentle to moderate offshore breeze will have these waves peeling nicely.
The standout of the first week, though, is Wednesday the 2nd of September. The morning session lights up with an 12 ft WSW swell and a 16-second period. The combined energy is a massive 7252. That’s a lot of water moving. The wind is offshore from the WNW, and the guidance tells me this spot loves that SSW direction, so the WSW is right in the wheelhouse. This is a big, powerful groundswell, and on a point, that long period will wrap in beautifully. It’s definitely one for the experts. The afternoon eases back to 7 ft but stays clean.
Thursday the 3rd is a full-on, raw day. Morning rain showers with a 19 mph offshore wind and a 15 ft swell. The energy is at 10396. It’s wild, but the wind is hard offshore, making it clean but a serious paddle. The afternoon is the real gem, though: 16 ft of SW swell, 14-second period, and a combined energy of 11606. The wind stays offshore, and the forecast is exceptional for experts. This is the best of the whole run if you’ve got the nerve.
We get a bit of a breather on Friday the 4th with a lighter 8 ft SW swell and clean conditions, but then the following Saturday the 5th picks up again with a strong 19 mph to 28 mph offshore wind and a 10 ft to 16 ft swell. The wind is so strong it’s going to be clean but hard to paddle into, and at 16 ft, it’s a beast. The wind swell period drops to 12 seconds, and the energy is still huge. Honestly, this setup might be more interesting for the kite crew than paddle surfers, especially on the Saturday afternoon.
The next real standout in the second week is Wednesday the 9th of September. The afternoon session is exceptional for experts with a 15 ft SW swell, 15-second period, and a combined energy of 13057. The wind is gentle and offshore from the west, making for a clean, powerful wave. It’s a long-range call, so keep an eye on it, but it looks promising.
We finish the run with a few days of smaller, cleaner surf. Friday the 11th of September morning is a rare treat, with 7 ft SW swell, a 19-second period, and glassy conditions. The wind is dead calm. That’s a beautiful, long-period groundswell with no wind. It’s going to be a dream to paddle out, but watch out for the long lulls between sets.
Overall, the first week is action-packed, with Wednesday the 2nd and Thursday the 3rd being the absolute highlights. After that, there are a few days of easing waves, but the second week has the Wednesday the 9th blowing up again. Stay safe out there, and respect the size.
Rusty.
Short Range ForecastMostly dry. Very mild (max 19°C on Tue morning, min 8°C on Sun night). Winds increasing (calm on Mon afternoon, fresh winds from the NNW by Tue morning). | Days 5-7 Weather SummaryLight rain (total 6mm), mostly falling on Tue afternoon. Warm (max 20°C on Tue afternoon, min 9°C on Thu night). Mainly fresh winds. | |||||||||||||||||||
Sat 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | ||||||||||||||
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 14 | SW 14 | SW 14 | SW 15 | SW 14 | SW 16 | SW 16 | SW 15 | SW 14 | WSW 16 | SW 16 | SW 15 | WSW 14 | SW 14 | SW 15 | SW 15 | SW 15 | SW 15 |
Wave Graph | ||||||||||||||||||||
1558 | 743 | 1196 | 1330 | 1349 | 1325 | 1289 | 1953 | 1248 | 696 | 676 | 5647 | 2354 | 2309 | 8440 | 9079 | 3051 | 2278 | 1881 | 1108 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | off | off | off | cross-off | cross-off | cross-off | cross-off | off | off | off | cross-off | off | off | off | cross-off | cross-off | cross-off |
High Tide | 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 | 5:16PM2.15m | ||||||||
Low Tide | 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 | 10:27AM0.05m | 11:03PM0.95m | |||||||
— | — | 6:52 | — | — | 6:50 | — | — | 6:48 | — | — | 6:47 | — | — | 6:46 | — | — | 6:43 | — | — | |
5:59 | — | — | 6:00 | — | — | 6:00 | — | — | 6:01 | — | — | 6:02 | — | — | 6:04 | — | — | 6:05 | — | |
mm | — | — | — | — | — | — | — | — | — | 3 | 1 | — | — | 1 | 1 | — | — | — | — | 27 |
Temp °C | 12 | 10 | 12 | 12 | 9 | 13 | 13 | 12 | 19 | 20 | 14 | 15 | 14 | 13 | 13 | 12 | 11 | 13 | 17 | 14 |
Feels °C | 8 | 7 | 8 | 8 | 7 | 11 | 11 | 7 | 13 | 15 | 9 | 10 | 10 | 8 | 8 | 7 | 6 | 10 | 15 | 9 |
Swell 1 Height (m) Direction Period (s) | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 15 | SW 14 | SW 16 | SW 16 | SW 15 | SW 14 | SW 17 | SW 16 | SW 15 | SW 14 | SW 14 | SW 15 | SW 15 | SW 15 | SW 15 |
641 | 743 | 1196 | 1330 | 1349 | 1325 | 1289 | 1953 | 1248 | 696 | 676 | 1605 | 2354 | 2309 | 1956 | 2527 | 3051 | 2278 | 1881 | 1108 | |
Swell 2 Height (m) Direction Period (s) | SW 23 | WSW 13 | SW 20 | SW 20 | S 14 | SW 20 | SW 18 | — | — | ENE 4 | SW 18 | — | — | — | — | — | S 15 | S 14 | — | NE 5 |
21 | 116 | 136 | 61 | 15 | 373 | 710 | — | — | 2 | 117 | — | — | — | — | — | 17 | 4 | — | 17 | |
Swell 3 Height (m) Direction Period (s) | E 9 | SW 21 | S 15 | S 15 | — | S 15 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
2 | 72 | 18 | 17 | — | 4 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | SW 14 | — | — | — | — | — | — | — | N 3 | NNW 3 | NW 3 | WSW 16 | — | — | WSW 14 | SW 14 | — | — | — | N 4 |
1558 | — | — | — | — | — | — | — | 4 | 4 | 2 | 5647 | — | — | 8440 | 9079 | — | — | — | 9 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 454 | 454 | 0 | 0 | 0 | 35 | 37 | 0 | 0 | 0 | 0 | 20 |
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.











