
Surf Forecasts:
Marengo surf forecast from 11 Sep 2026:
- Best quality surf: Saturday 12 Sep, 7AM (local time) - 7ft (2.2m), 16s period, SW swell with glassy winds.
- Most powerful swell: Tuesday 15 Sep, 7PM (local time) - 13ft (4.0m), 14s period, SW swell with 6,565 kJ wave energy.
- Next surfable swell (1★+): Saturday 12 Sep, 7AM (local time) - 7ft (2.2m), 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 Saturday (Sep 12) at 7AM. The primary swell is predicted to be 2.2m and 16s period. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Marengo in the next 16 days are 4.0m 14s and forecast to arrive on Tuesday (Sep 15) at 7PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 6s period and expected on Monday (Sep 14) at 10PM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Sat 12th Sep) | 7ft (2.2m) 16s |
| Best Surf | 7AM (Sat 12th Sep) | 7ft (2.2m) 16s |
| Most Powerful | 7PM (Tue 15th Sep) | 13ft (4.0m) 14s |
Table - best surf conditions forecast for Marengo over the next 16 days.
The Lowdown
G’day, I’m Rusty.
Alright, let’s talk about Marengo. Water temps are sitting around 57°F, which is about average for this time of year – nothing out of the ordinary there. The setup here is a reef and point, and early on we’ve got a real solid pulse of SW groundswell coming through, with a very long 15-second period. That long-period stuff really loves a point or reef, so this break should handle it beautifully.
Friday morning is the clear standout to kick things off. We’ve got a clean 8 ft SW swell with a 15-second period and glassy conditions – dead calm wind. This is proper groundswell, well-shaped, and the energy is pumping hard (2276). That’s quality surf, but at that size it’s definitely one for experienced surfers. If you’ve got the skill, this is the best on offer.
Friday afternoon stays big at 8 ft but the wind swings around to a light cross-on, which will put a bit of texture on the face. Not terrible, but the morning is where it’s at.
Saturday morning and afternoon are both absolute crackers too – glassy again, with a clean 7 ft to 6 ft SW swell, same long period. The energy is still solid (1976 dropping to 1462), and the conditions will be pristine. Perfect for anyone with some skill.
Sunday sees a big drop in size and quality – strong N winds blow through, and the swell drops to 4 ft, so it’s a day to rest.
Monday has dropped right off into tiny stuff – 3 ft and 2 ft. Nothing to get excited about.
Tuesday the 15th is a different beast – a big, raw 12 ft to 13 ft SW swell rolls in, but it’s messy with rain showers and strong cross-off winds. The energy is massive (7092 to 9775), but that’s more of a kite-surfing setup than a clean paddle day. Only for the very brave and experienced.
Wednesday the 16th hangs around 8 ft with better winds, but there’s a cross-shore chop on the morning. The afternoon cleans up a bit.
Thursday the 17th looks sweet – clean 6 ft SW swell, long period, light cross-off winds. Excellent for experienced surfers.
Friday the 18th holds similar – 6 ft morning, dropping to 5 ft in the arvo, clean, light winds. Nice.
Then there’s a quiet spell. Saturday the 19th is tiny and blown out by strong NW winds. Sunday the 20th has some glassy 3 ft leftovers, but nothing special.
Monday the 21st is small and ordinary.
Now, here’s the next standout – Tuesday the 22nd. Look out. A new pulse hits hard – 12 ft SW swell, 16-second period, with glassy conditions in the morning and light cross-off in the afternoon. The energy is enormous (8871 to 9981). This is exceptional, expert-level surf. If you can handle it, this is the second big highlight of the outlook.
Wednesday the 23rd drops to a manageable 7 ft to 7 ft with offshore winds – clean, plenty of push, great for experienced surfers.
Thursday the 24th stays fun with 6 ft SW swell and clean offshore breezes.
Friday the 25th gets a bit lumpy again with strong SW winds and 8 ft swell – a bit rough.
Saturday the 26th closes out the outlook with a big 12 ft SSW swell and moderate cross-off winds. Size is there, but it’s a bit raw.
So, to sum it up – the absolute best windows are Friday morning the 11th and Tuesday the 22nd. Both offer big, clean, long-period groundswell at Marengo. The first week has more consistent quality, the second week is more for the hardcore crew chasing size.
Rusty.
Short Range ForecastMostly dry. Warm (max 23°C on Sun morning, min 10°C on Fri night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 7mm), mostly falling on Mon night. Very mild (max 16°C on Mon morning, min 8°C on Wed night). Winds decreasing (fresh winds from the SW on Tue afternoon, light winds from the WSW by Wed night). | ||||||||||||||||||||
Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | |||||||||||||||
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 15 | SW 16 | SW 16 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 14 | SW 13 | SW 7 | SW 13 | SW 14 | SW 14 | SSW 15 | SSW 15 | SSW 15 | SW 14 | SSW 14 | SW 17 |
Wave Graph | |||||||||||||||||||||
2276 | 3219 | 3098 | 1976 | 1456 | 1068 | 809 | 674 | 355 | 218 | 173 | 194 | 4445 | 6156 | 6029 | 3030 | 3072 | 2444 | 1491 | 1388 | 3074 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-on | cross-on | glassy | glassy | cross | cross-off | cross-off | cross-off | off | off | off | cross-off | cross-off | cross-off | cross | cross-off | off | cross-off | cross-off | cross-off |
High Tide | 12:30PM1.85m | 00:56AM2.06m | 1:20PM2.08m | 1:32AM2.11m | 2:03PM2.25m | 2:04AM2.12m | 2:41PM2.36m | 2:34AM2.10m | 3:17PM2.38m | 3:03AM2.04m | 3:51PM2.34m | 3:30AM1.96m | 4:25PM2.23m | 3:55AM1.85m | |||||||
Low Tide | 6:42PM0.57m | 7:11AM0.53m | 7:29PM0.53m | 7:45AM0.36m | 8:10PM0.52m | 8:17AM0.23m | 8:47PM0.54m | 8:47AM0.16m | 9:22PM0.59m | 9:18AM0.14m | 9:54PM0.68m | 9:47AM0.17m | 10:25PM0.79m | ||||||||
6:33 | — | — | 6:31 | — | — | 6:30 | — | — | 6:28 | — | — | 6:26 | — | — | 6:24 | — | — | 6:24 | — | — | |
— | 6:10 | — | — | 6:12 | — | — | 6:13 | — | — | 6:13 | — | — | 6:14 | — | — | 6:15 | — | — | 6:15 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | 3 | 2 | 2 | — | — | — | — | — | — | — |
Temp °C | 13 | 12 | 11 | 18 | 19 | 17 | 23 | 22 | 18 | 16 | 15 | 12 | 10 | 10 | 10 | 11 | 11 | 9 | 11 | 11 | 8 |
Feels °C | 10 | 10 | 7 | 17 | 18 | 12 | 19 | 19 | 16 | 14 | 10 | 8 | 3 | 1 | 2 | 6 | 7 | 6 | 7 | 7 | 5 |
Swell 1 Height (m) Direction Period (s) | SW 15 | SW 16 | SW 16 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 14 | SW 13 | SW 7 | SW 14 | SW 14 | SSW 15 | SSW 15 | SSW 15 | SSW 15 | SW 14 | SSW 14 | SW 17 |
2276 | 3219 | 3098 | 1976 | 1456 | 1068 | 809 | 674 | 355 | 218 | 173 | 82 | 2647 | 3619 | 3682 | 3030 | 3072 | 2444 | 1491 | 1388 | 3074 | |
Swell 2 Height (m) Direction Period (s) | — | S 17 | S 16 | — | S 17 | — | — | ENE 4 | S 11 | SSW 10 | WSW 19 | SW 12 | — | — | — | — | — | — | — | — | SSW 18 |
— | 24 | 5 | — | 6 | — | — | 1 | 58 | 19 | 36 | 75 | — | — | — | — | — | — | — | — | 578 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | W 21 | SW 20 | NE 4 | SW 18 | — | — | — | — | — | — | — | — | S 17 |
— | — | — | — | — | — | — | — | 9 | 15 | 1 | 79 | — | — | — | — | — | — | — | — | 49 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | NNE 3 | NNW 3 | N 3 | NE 4 | SW 5 | SW 7 | SW 13 | SW 14 | SW 14 | — | — | — | — | — | — |
— | — | — | — | — | — | 2 | 1 | 5 | 2 | 5 | 194 | 4445 | 6156 | 6029 | — | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 130 | 18 | 0 | 0 | 20 | 20 | 0 | 0 | 0 | 0 | 59 | 682 | 729 | 276 | 351 | 130 | 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.










