
Surf Forecasts:
Marengo surf forecast from 5 Aug 2026:
- Best quality surf: Wednesday 12 Aug, 4PM (local time) - 20ft (6.0m), 18s period, WSW swell with offshore winds.
- Most powerful swell: Thursday 13 Aug, 4AM (local time) - 26ft (8.0m), 18s period, SW swell with 37,855 kJ wave energy.
- Next surfable swell (1★+): Thursday 6 Aug, 7PM (local time) - 2.5ft (0.8m), 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 Thursday (Aug 06) at 7PM. The primary swell is predicted to be 0.8m and 16s period with a secondary swell of 0.5m and 6s. Another secondary swell of 0.8m and 6s is also forecast. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Marengo in the next 16 days are 8.0m 18s and forecast to arrive on Thursday (Aug 13) 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 0.9m 4s period and expected on Wednesday (Aug 12) at 1PM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7PM (Thu 6th Aug) | 2.5ft (0.8m) 16s |
| Best Surf | 4PM (Wed 12th Aug) | 20ft (6.0m) 18s |
| Most Powerful | 4AM (Thu 13th Aug) | 26ft (8.0m) 18s |
Table - best surf conditions forecast for Marengo over the next 16 days.
The Lowdown
G’day, Rusty here. Let’s get straight into it. This outlook is for the Marengo region, covering the next couple of weeks. It’s a slow start, but there’s some real juice building for the second week if you’re an experienced surfer.
Right now, Thursday the 6th, we’ve got a tiny 2 ft SSW groundswell at 16 seconds rolling in. Combined energy is weak at 314, and with a cross-off breeze, it’s a pretty marginal call. Water temp is sitting at 57° – about average for this time of year.
Friday the 7th is where things start to turn. The swell bumps up to 5 ft from the SW, period still 16 seconds, and the combined energy jumps to 1105 – moderate energy. The real kicker is the wind. Friday morning we get a light 5 mph NW cross-off, but Friday afternoon turns glassy with a NE 5 mph breeze. That’s clean, lined-up surf, and with Marengo being a reef and point break, that long-period groundswell is going to wrap in nicely. This is the standout of the first week – a solid 4 ft to 5 ft SW swell, glassy conditions, and the break is fairly consistent. Could get a few out, but with crowds listed as ‘sometimes’, just be aware it might not be empty.
Saturday the 8th and Sunday the 9th are a write-off. Strong cross-shore winds and a chop ruin any quality – the swell drops to 3 ft on Sunday with only 399 combined energy. A real shame after Friday’s clean lines.
Monday the 10th sees a big change. Swell jumps to 6 ft from the SW, period 18 seconds, combined energy hits 3487 – strong energy. Morning offshore winds from the WSW at 19 mph make for clean, hollow waves. This is getting big for beginners though – over 5 ft – so it’s more for the intermediate crew. Afternoon kicks up to 6 ft with a cross-off breeze. Still solid, but the wind’s not as clean as the morning.
Tuesday the 11th and Wednesday the 12th morning keep the swell around 5 ft to 7 ft. Wednesday morning sees a 7 ft SW groundswell at 19 seconds, combined energy 7364 – that’s strong. Offshore WNW wind at 19 mph keeps it clean. But Wednesday afternoon is the big one – 20 ft WSW swell, 18-second period, and a combined energy of 26378. That’s very strong. The forecast says the wind and tide are good, but the swell is too big for this break. Only for absolute experts, and even then, paddling in might be near impossible. Thursday the 13th stays massive – 25 ft in the morning and 16 ft in the afternoon – same story. Too big for most.
Friday the 14th and Saturday the 15th morning are the next real standouts. Friday sees 7 ft to 8 ft SW swell, period 16 seconds, with offshore winds at 12 mph to 16 mph. Clean, powerful waves. Combined energy is 2354 – moderate to strong. This is excellent for experienced surfers. Saturday morning is similar, 8 ft SW at 17 seconds, moderate offshore. Crowds could be around, but the quality makes it worth it.
After that, the swell drops. Sunday the 16th has onshore wind and smaller 6 ft swell – messy. Monday the 17th is back to clean but small, 3 ft to 3 ft, and combined energy is weak. Tuesday the 18th picks up a little with 4 ft WSW and offshore wind, but it’s nothing thrilling.
Wednesday the 19th and Thursday the 20th keep the swell between 5 ft and 8 ft, but cross-shore winds on Wednesday spoil it. Thursday afternoon though – 8 ft SW swell, 20-second period, combined energy 4414, and a light WNW cross-off breeze – that’s going to be long, clean lines. This late in the run (August 20th, over a week away) it’s promising, but less certain. Keep an eye on it.
Friday the 21st fades with 6 ft to 5 ft and fresh side-shore winds – not the best to end on.
Best on offer: Friday August 7th afternoon – glassy 4 ft SW groundswell, clean and fun for everyone. And for the experienced crew, Friday August 14th morning – 7 ft SW, offshore, solid and clean.
Rusty
Short Range ForecastLight rain (total 4mm), mostly falling on Sat night. Very mild (max 14°C on Fri morning, min 8°C on Thu night). Winds increasing (calm on Fri afternoon, fresh winds from the N by Sat night). | Days 4-6 Weather SummaryModerate rain (total 18mm), heaviest on Sun night. Very mild (max 16°C on Tue morning, min 10°C on Sun night). Mainly strong winds. | ||||||||||||||||||||
Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | |||||||||||||||
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 16 | SW 16 | SW 17 | SW 16 | SW 15 | SW 17 | SW 16 | SW 15 | SW 14 | WSW 14 | SW 16 | SW 20 | SW 18 | SW 17 | SW 16 | SW 14 | SW 14 | SW 22 | SW 19 | WSW 18 | SW 16 |
Wave Graph | |||||||||||||||||||||
248 | 299 | 594 | 976 | 640 | 1199 | 917 | 763 | 536 | 323 | 219 | 1286 | 2014 | 2007 | 1317 | 833 | 648 | 372 | 3380 | 21999 | 20555 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | off | cross-off | glassy | cross | cross | cross | cross | cross | cross | cross-off | off | cross-off | cross-off | cross-off | cross-off | cross-off | off | off | cross-off |
High Tide | 5:46PM2.00m | 4:53AM1.85m | 6:41PM1.95m | 5:22AM1.77m | 7:49PM1.89m | 5:59AM1.68m | 9:15PM1.87m | 6:52AM1.57m | 10:40PM1.93m | 8:40AM1.47m | 11:47PM2.03m | 10:50AM1.52m | 00:38AM2.14m | ||||||||
Low Tide | 11:00AM0.18m | 11:25PM0.97m | 11:37AM0.15m | 00:09AM1.14m | 12:20PM0.18m | 1:06AM1.29m | 1:16PM0.26m | 2:53AM1.40m | 2:32PM0.36m | 5:03AM1.33m | 4:09PM0.42m | 6:12AM1.17m | 5:31PM0.42m | ||||||||
7:22 | — | — | 7:22 | — | — | 7:20 | — | — | 7:20 | — | — | 7:18 | — | — | 7:16 | — | — | 7:16 | — | — | |
— | 5:38 | — | — | 5:39 | — | — | 5:40 | — | — | 5:42 | — | — | 5:43 | — | — | 5:44 | — | — | 5:44 | — | |
mm | — | — | — | — | — | — | — | — | 4 | 6 | 3 | 8 | — | 1 | — | — | — | — | 2 | 6 | 2 |
Temp °C | 12 | 13 | 11 | 14 | 13 | 12 | 14 | 13 | 11 | 12 | 11 | 10 | 12 | 11 | 12 | 16 | 15 | 14 | 12 | 9 | 10 |
Feels °C | 8 | 8 | 6 | 12 | 11 | 8 | 10 | 9 | 4 | 8 | 8 | 4 | 5 | 6 | 7 | 11 | 10 | 8 | 5 | 0 | 1 |
Swell 1 Height (m) Direction Period (s) | SW 16 | SW 16 | SW 17 | SW 16 | SW 15 | SW 17 | SW 16 | SW 15 | SW 14 | WSW 14 | SW 13 | SW 20 | SW 18 | SW 17 | SW 16 | SW 14 | SW 14 | SW 13 | SW 19 | SW 18 | SW 16 |
248 | 299 | 594 | 976 | 640 | 1199 | 917 | 763 | 536 | 323 | 175 | 1286 | 2014 | 2007 | 1317 | 833 | 648 | 336 | 3380 | 4379 | 10935 | |
Swell 2 Height (m) Direction Period (s) | S 8 | S 8 | WSW 14 | SSW 6 | SW 19 | SSW 6 | — | — | ENE 5 | SW 18 | SW 16 | WSW 14 | — | SSW 9 | SSW 8 | SSW 8 | S 8 | SW 22 | WSW 13 | — | — |
33 | 12 | 140 | 33 | 427 | 13 | — | — | 2 | 51 | 219 | 352 | — | 495 | 140 | 90 | 33 | 372 | 1207 | — | — | |
Swell 3 Height (m) Direction Period (s) | SW 11 | E 9 | SW 7 | SW 19 | SSW 6 | — | — | — | — | — | ENE 6 | E 6 | — | ESE 9 | — | — | W 26 | S 8 | — | — | — |
33 | 2 | 41 | 96 | 32 | — | — | — | — | — | 22 | 12 | — | 9 | — | — | 13 | 11 | — | — | — | |
Wind waves Height (m) Direction Period (s) | WNW 3 | WSW 5 | WSW 7 | — | — | — | NE 4 | NE 5 | N 3 | ENE 5 | NE 6 | — | SW 11 | SW 10 | — | NNW 3 | N 3 | N 3 | W 12 | WSW 18 | SW 16 |
4 | 5 | 145 | — | — | — | 14 | 12 | 2 | 25 | 79 | — | 1473 | 1503 | — | 9 | 2 | 4 | 2777 | 21999 | 20555 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 2 | 21 | 0 | 0 | 0 | 20 | 20 | 20 | 153 | 20 | 20 | 241 | 59 | 21 | 21 | 21 | 21 | 21 | 37 | 583 | 76 |
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.











