Surf Forecasts:
Marengo surf forecast from 1 Sep 2026:
- Best quality surf: Thursday 3 Sep, 7PM (local time) - 18ft (5.5m), 14s period, WSW swell with offshore winds.
- Most powerful swell: Thursday 3 Sep, 7PM (local time) - 18ft (5.5m), 14s period, WSW swell with 13,275 kJ wave energy.
- Next surfable swell (1★+): Wednesday 2 Sep, 7AM (local time) - 5ft (1.6m), 17s 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 Wednesday (Sep 02) at 7AM. The primary swell is predicted to be 1.6m and 17s 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 5.5m 14s and forecast to arrive on Thursday (Sep 03) at 7PM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 4s period and expected on Thursday (Sep 03) at 7AM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Wed 2nd Sep) | 5ft (1.6m) 17s |
| Best Surf | 7PM (Thu 3rd Sep) | 18ft (5.5m) 14s |
| Most Powerful | 7PM (Thu 3rd Sep) | 18ft (5.5m) 14s |
Table - best surf conditions forecast for Marengo over the next 16 days.
The Lowdown
Alright, this is a look at the next 16 days for Marengo, a reef and point. We’ve got a classic event window coming up, but you’ve got to pick your moments.
Right now we’re in a quiet spell, not much to get excited about, but come Thursday, things properly kick off. Thursday the 3rd is the big one to circle on your calendar. We’ve got a solid 18 ft southwest groundswell with a 14-second period rolling in, and the wind is offshore and fresh all day. It’s a beast – with combined energy readings hitting 13762 to 15143, this is a seriously powerful, straight-up serious surf day. That said, at that size, Marengo is going to be heavy and hollow, strictly for experienced surfers. This is the standout window.
There's another pulse early Saturday the 5th with another 18 ft WSW swell, but the wind is howling from the WNW at 25 mph. Even though it’s offshore, that’s strong enough to make paddling out a real battle and the surface will be all torn up. Not as user-friendly as Thursday's window.
We do get a couple of glassy mornings that will offer a break from the heavy stuff. Monday the 7th morning is glassy with only a small 3 ft swell (256 energy), so it’s a session for the longboard or for getting your bearings, not for power. Then on Tuesday the 8th morning, the swell bumps up to 4 ft with a very long 18-second period and glassy conditions. That’s a real gem for the point – a long-period groundswell will wrap in perfectly here, offering clean, lined-up waves with easy paddling between sets.
Later on, Sunday the 12th morning brings an 8 ft SW groundswell with a 16-second period and glassy conditions. That’s excellent for experienced surfers – plenty of power but clean. The energy is strong at 5158. The swell is also predicted to be too big for the break on Monday the 14th morning (18 ft SW, period 17 seconds, energy hitting 28631). That’s a massive, dangerous swell for this setup.
So, in short, Thursday the 3rd is the no-brainer for the big, powerful, expert-level session. For something clean but easier, the Tuesday the 8th morning is your pick for those long, peeling point waves. The rest of the second week has windows of good swell, but you’ll be dealing with onshore winds that’ll mess up the surface.
Stay safe out there.
- Rusty
Short Range ForecastModerate rain (total 16mm), heaviest on Fri night. Very mild (max 15°C on Fri morning, min 8°C on Thu night). Mainly fresh winds. | Days 4-6 Weather SummaryLight rain (total 8mm), mostly falling on Sat morning. Very mild (max 14°C on Sun morning, min 8°C on Mon night). Winds decreasing (strong winds from the W on Sat morning, calm by Mon night). | ||||||||||||||||||||
Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | |||||||||||||||
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 15 | SW 15 | SW 14 | WSW 14 | SW 15 | SW 16 | SW 16 | SW 16 | SW 15 | SW 15 | WSW 12 | W 14 | SW 13 | SW 13 | SW 13 | SW 21 | SW 20 | SW 18 | SW 17 | SW 16 |
Wave Graph  | |||||||||||||||||||||
 kJ | 1739 | 1776 | 1907 | 5512 | 12490 | 4739 | 4065 | 3820 | 2963 | 1882 | 4514 | 5195 | 1784 | 933 | 504 | 315 | 274 | 537 | 1099 | 1519 | 1185 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | off | cross-off | off | off | cross-off | cross-off | cross-off | cross-off | cross-off | off | off | cross-off | cross-off | off | cross-off | cross-off | glassy | off | off | cross-off |
High Tide | 3:56PM2.28m | 3:30AM1.99m | 4:34PM2.25m | 3:56AM1.93m | 5:16PM2.15m | 4:24AM1.85m | 6:06PM2.01m | 4:57AM1.76m | 7:10PM1.86m | 5:37AM1.63m | 8:43PM1.77m | 6:47AM1.48m | 10:19PM1.79m | ||||||||
Low Tide | 9:55PM0.70m | 9:54AM0.07m | 10:28PM0.82m | 10:27AM0.05m | 11:03PM0.95m | 11:05AM0.10m | 11:43PM1.09m | 11:49AM0.22m | 00:37AM1.23m | 12:46PM0.40m | 2:34AM1.31m | 2:18PM0.59m | |||||||||
 |  |  | | |  | |  | |  | |  | | |  | | | | | | | |
 | 6:47 | — | — | 6:46 | — | — | 6:43 | — | — | 6:43 | — | — | 6:41 | — | — | 6:39 | — | — | 6:37 | — | — |
 | — | 6:02 | — | — | 6:04 | — | — | 6:05 | — | — | 6:06 | — | — | 6:06 | — | — | 6:07 | — | — | 6:07 | — |
mm | — | — | 3 | — | — | — | — | 1 | 12 | 5 | 3 | — | — | — | — | — | — | — | — | — | 1 |
Temp °C | 14 | 14 | 13 | 13 | 13 | 11 | 15 | 14 | 14 | 12 | 12 | 12 | 14 | 14 | 12 | 14 | 13 | 11 | 14 | 13 | 11 |
Feels °C | 9 | 9 | 8 | 5 | 6 | 6 | 11 | 10 | 10 | 5 | 4 | 6 | 10 | 10 | 10 | 11 | 10 | 9 | 10 | 9 | 6 |
Swell 1 Height (m) Direction Period (s) | SW 16 | SW 15 | SW 15 | SW 14 | SW 14 | SW 15 | SW 16 | SW 16 | SW 16 | SW 15 | SW 15 | SW 14 | SW 14 | SW 13 | SW 13 | SW 13 | SW 13 | SW 14 | SW 18 | SW 17 | SW 16 |
| kJ | 1739 | 1776 | 1907 | 2895 | 3467 | 4739 | 4065 | 3820 | 2963 | 1882 | 2226 | 1838 | 1273 | 933 | 504 | 315 | 231 | 387 | 1099 | 1519 | 1185 |
Swell 2 Height (m) Direction Period (s) | S 9 | S 16 | S 16 | — | — | S 15 | — | — | — | — | — | — | W 14 | WSW 18 | — | SW 22 | SW 21 | SW 20 | SW 13 | SSE 8 | — |
| kJ | 7 | 5 | 21 | — | — | 18 | — | — | — | — | — | — | 1784 | 31 | — | 18 | 110 | 537 | 231 | 13 | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | W 24 | SW 22 | SW 21 | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 11 | 73 | 274 | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | SW 14 | WSW 14 | — | — | — | — | NW 3 | SW 15 | WSW 12 | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | 5512 | 12490 | — | — | — | — | 4 | 4514 | 5195 | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 35 | 0 | 21 | 76 | 59 | 2 | 21 | 20 | 20 | 563 | 534 | 2 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 557 |
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.
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