Surf Forecasts:
Marengo surf forecast from 25 Aug 2026:
- Best quality surf: Friday 28 Aug, 10AM (local time) - 5ft (1.6m), 18s period, SW swell with cross-offshore winds.
- Most powerful swell: Sunday 30 Aug, 7PM (local time) - 8ft (2.5m), 18s period, SSW swell with 3,663 kJ wave energy.
- Next surfable swell (1★+): Wednesday 26 Aug, 7PM (local time) - 2.5ft (0.8m), 13s period with WSW 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 (Aug 26) at 7PM. The primary swell is predicted to be 1.0m and 10s period with a secondary swell of 0.8m 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 2.5m 18s and forecast to arrive on Sunday (Aug 30) 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 0.9m 5s period and expected on Thursday (Aug 27) at 7PM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7PM (Wed 26th Aug) | 2.5ft (0.8m) 13s |
| Best Surf | 10AM (Fri 28th Aug) | 5ft (1.6m) 18s |
| Most Powerful | 7PM (Sun 30th Aug) | 8ft (2.5m) 18s |
Table - best surf conditions forecast for Marengo over the next 16 days.
The Lowdown
G’day, Rusty here. We’ve got a solid stretch of surf on the way at Marengo, but the pick of the days really stand out. This is a reef and point break, pretty exposed to the south-west, so it grabs whatever swell is running and turns it into something worthwhile. Water temp feels about average for the time of year, nothing unusual.
The action starts proper on Friday, 28 August. That morning the swell jumps to 5ft from the SW, with a long period of 18 seconds—proper groundswell—and combined energy reading 1645 (moderate to strong). The wind is a light breeze from the SW, which is cross-off shore. This keeps things clean for experienced surfers, but with that long period, the waves will peel nicely at this point setup. If you’ve got the skills, this is the first standout.
Saturday, 29 August, afternoon is a beauty too. Swell hits 6ft from the SW, period 14 seconds, energy up at 2015 (strong). Wind goes offshore from the WSW at 12 mph, giving you moderate offshore conditions—clean and lined up. Still in the experienced surfer zone, but the quality is there.
Then Monday, 31 August is absolute gold. Morning brings glassy conditions, wind from the NE at 3 mph—dead calm—and 7ft SW swell at a 15-second period, energy 2117 (strong). Afternoon is flat calm, 0 wind, 7ft SW swell, same long period. Both sessions are glassy, clean, and pumping. This is your second standout window.
Tuesday, 01 September is a write-off with fresh breeze up to 19 mph from the NNW making things messy. Not worth paddling out.
Things get big from Saturday, 05 September onwards. That morning sees 10ft SW swell, 17 seconds, energy 4368 (very strong). That’s expert-only territory. The wind is cross-off, but the size is intimidating. Sunday, 06 September pushes to 12ft SW swell with strong offshore wind from the WSW at 25 mph, but with rain showers and energy at 5487 (very strong). It’s powerful and hard to paddle into—more of a big-wave show. Monday, 07 September is similar, 12ft, strong offshore, but again only for the brave.
Wednesday, 09 September afternoon sees another massive burst: 10ft SW swell, 15 seconds, energy at 7512 (very strong). That’s a huge amount of energy, and the fresh offshore wind will make for some epic, heavy waves if you’re experienced enough.
Final call: the best bets for clean, powerful waves without going fully mental are Friday morning 28 August and Monday 31 August. If you’re a charger, the first week of September has size to burn. Crowds at Marengo can show up sometimes, so get in early.
Rusty
Short Range ForecastSome drizzle, heaviest during Fri morning. Very mild (max 13°C on Wed morning, min 8°C on Wed night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Very mild (max 18°C on Mon afternoon, min 7°C on Fri night). Wind will be generally light. | ||||||||||||||||||
Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | ||||||||||||||
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) | SSW 12 | SSW 12 | SW 13 | SSW 12 | SSW 11 | SW 21 | WSW 19 | SW 18 | SW 17 | SW 16 | SW 14 | SW 14 | SW 13 | SSW 14 | SSW 17 | SW 16 | SW 15 | SW 15 | SW 16 |
Wave Graph  | |||||||||||||||||||
 kJ | 378 | 357 | 623 | 246 | 156 | 125 | 465 | 1634 | 1453 | 989 | 746 | 1344 | 501 | 1005 | 2929 | 2694 | 2117 | 2075 | 1622 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off | cross-off | off | off | cross-off | cross-off | glassy | glassy | glassy | cross-off |
High Tide | 11:50PM1.81m | 10:52AM1.33m | 00:32AM1.91m | 12:05PM1.48m | 1:03AM2.01m | 12:54PM1.66m | 1:30AM2.07m | 1:34PM1.85m | 1:54AM2.10m | 2:10PM2.02m | 2:18AM2.10m | 2:45PM2.16m | 2:42AM2.08m | ||||||
Low Tide | 6:44AM1.17m | 5:21PM0.71m | 7:04AM1.03m | 6:16PM0.66m | 7:25AM0.89m | 7:00PM0.61m | 7:46AM0.73m | 7:39PM0.57m | 8:08AM0.57m | 8:14PM0.56m | 8:31AM0.41m | 8:49PM0.57m | |||||||
 |  | |  |  | | |  | | | | | | | | | | | | |
 | — | 6:58 | — | — | 6:56 | — | — | 6:54 | — | — | 6:52 | — | — | 6:52 | — | — | 6:50 | — | — |
 | — | — | 5:57 | — | — | 5:58 | — | — | 5:59 | — | — | 5:59 | — | — | 6:00 | — | — | 6:00 | — |
mm | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 12 | 13 | 12 | 9 | 13 | 13 | 11 | 12 | 12 | 9 | 11 | 11 | 10 | 13 | 12 | 10 | 16 | 18 | 14 |
Feels °C | 8 | 9 | 8 | 7 | 11 | 11 | 8 | 9 | 8 | 7 | 6 | 7 | 8 | 10 | 9 | 9 | 15 | 17 | 11 |
Swell 1 Height (m) Direction Period (s) | SSW 12 | SSW 12 | SW 13 | SSW 12 | SSW 11 | SSW 11 | SW 14 | SW 18 | SW 17 | SW 16 | SW 14 | SW 14 | SW 13 | SSW 14 | SSW 17 | SW 16 | SW 15 | SW 15 | SW 16 |
| kJ | 378 | 336 | 623 | 246 | 156 | 117 | 363 | 1634 | 1453 | 989 | 746 | 650 | 501 | 1005 | 2929 | 2694 | 2117 | 2075 | 1622 |
Swell 2 Height (m) Direction Period (s) | WSW 14 | WSW 14 | — | WSW 13 | WSW 12 | WSW 14 | WSW 19 | ESE 11 | SE 10 | — | — | SW 23 | SW 21 | SW 20 | SSE 15 | SSE 16 | — | — | — |
| kJ | 367 | 357 | — | 219 | 79 | 125 | 465 | 11 | 4 | — | — | 21 | 72 | 136 | 23 | 25 | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | SW 18 | — | SW 16 | SW 15 | SW 21 | SSW 10 | — | — | — | — | E 9 | E 10 | S 16 | S 16 | — | — | — | — |
| kJ | — | 12 | — | 90 | 75 | 113 | 33 | — | — | — | — | 2 | 2 | 19 | 48 | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | W 4 | — | — | — | — | — | SW 14 | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | 16 | — | — | — | — | — | 1344 | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 38 | 130 | 0 | 0 | 0 | 2 | 0 | 182 | 0 | 0 | 0 | 0 | 0 | 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.
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