Marengo Surf Break

Lat Long: 38.78° S 143.67° E

Marengo Surf Forecast and Surf Report

Issued: 9 pm 21 Aug 2026 (local time)

Forecast update in  hr  min

Today's Marengo sea temperature is
14.0° C
0.8° 

Marengo surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Marengo surf forecast from 21 Aug 2026:

  • Best quality surf: Saturday 22 Aug, 1PM (local time) - 16ft (5.0m), 14s period, SW swell with offshore winds.
  • Most powerful swell: Saturday 22 Aug, 10AM (local time) - 16ft (5.0m), 14s period, SW swell with 10,592 kJ wave energy.
  • Next surfable swell (1★+): Saturday 22 Aug, 1PM (local time) - 16ft (5.0m), 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 Saturday (Aug 22) at 1PM. The primary swell is predicted to be 5.0m and 14s period with a secondary swell of 3.0m and 15s. Another secondary swell of 0.1m and 24s 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 5.0m 14s and forecast to arrive on Saturday (Aug 22) at 10AM. 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 5s period and expected on Friday (Aug 28) at 7PM.

Wave TypeTime (AEST) & Date Wave Height & Period
Next good surf (1 star+) 1PM (Sat 22nd Aug)16ft (5.0m) 14s
Best Surf 1PM (Sat 22nd Aug)16ft (5.0m) 14s
Most Powerful10AM (Sat 22nd Aug)16ft (5.0m) 14s

Table - best surf conditions forecast for Marengo over the next 16 days.


The Lowdown

Alright, grab a coffee, because this forecast is a bit of a tale. We're looking at Marengo, a reef and point set-up. There's a massive pulse of energy coming through to kick things off, but it's not without its complications. This is going to be a full-on ride, with some serious swells, but you'll need to pick your moments for the clean ones.

The big story this Saturday, August 22nd, is not for the faint-hearted. The ocean is absolutely thumping with a very powerful swell, a proper 16ft SW groundswell. The energy numbers are massive. This is a beast. It’s for experienced surfers only—beginners, this is definitely one to watch from the beach. The wind is howling offshore at 16 mph, which is a blessing, but the sheer size makes it a heavy, expert-only affair. As the day goes on, it backs off a touch but remains solid at 10ft with a very long 15-second period, another big energy reading, and still offshore winds. This is the kind of power that really suits a reef setup. The water temp is about average for this time of year.

Sunday the 23rd sees the swell drop but it’s still a solid, clean blanketed 6ft to 7ft. The period is even longer, up to 16 seconds, which points to a beautifully shaped, powerful groundswell. Light winds keep it clean. It’s still a bit on the beefy side for beginners, but it’s a world apart from Saturday. This is the standout window of the first week.

Monday the 24th offers a step down to a very manageable and clean 5ft, with a decent 14-second period. Winds are super light. This is where it starts to look fun for a broader crowd.

We hit a flat spell from Tuesday the 25th. The wind turns onshore and the swell drops, so you’re looking at a shaky stretch of days. The next real sniff of action is the morning of Friday, August 28th. A new, clean 6ft SW groundswell with a lovely long 17-second period rolls in, and the wind is light offshore. This is another fine, expertly-lined day.

The weekend of the 29th and 30th is a mixed bag. Saturday looks a bit of a mess with cross-shore winds, but Sunday the 30th... hold onto your board. The afternoon absolute standout of the entire forecast is on Sunday afternoon. We're looking at a very powerful 10ft SSWest swell with a massive 18-second period and the forecast shows a massive energy rating. This is a major groundswell event. The wind is clean, making for an epic, heavy, expert-only session at the point.

The following Monday, August 31st, looks absolutely perfect for those who want the power without the absolute max size. We're seeing a glassy 7ft SW swell. That's the word, "glassy." A morning session right there would be pristine. The offshore winds kick back in on Tuesday, September 1st, with a solid 8ft, but that's also matched with strong winds.

After that, there are a few smaller, cleaner days on Thursday September 3rd and another solid pulse arrives on Friday September 4th, offering a powerful 8ft SW groundswell and a moderate offshore breeze. This run of consistent, clean swell toward the end of the window looks promising.

For the best on offer for the strongest, most expert-level ride, you cannot miss the afternoon of Sunday, August 30th. For a more manageable but still powerful clean session, the glassy Monday morning of August 31st is your ticket.

Rusty.

Short Range Forecast

Some drizzle, heaviest during Mon afternoon. Very mild (max 17°C on Mon morning, min 7°C on Sat night). Winds decreasing (fresh winds from the W on Fri night, calm by Sun afternoon).

Days 5-7 Weather Summary

Moderate rain (total 16mm), heaviest on Tue morning. Very mild (max 16°C on Thu morning, min 11°C on Mon night). Wind will be generally light.

Saturday
22
Sunday
23
Monday
24
Tuesday
25
Wednesday
26
Thursday
27
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
6
8
4
4
4
4
4
3
3
2
1
1
3
1
1
1
2
1
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
4
WSW
16
5
SW
14
3
SW
15
2.4
SW
14
1.9
SW
14
2
SW
16
1.8
SW
15
1.5
SW
14
1.4
SW
14
1.4
SW
13
1.6
SW
13
1.3
SSW
13
1.1
SW
14
0.9
WSW
14
0.8
WSW
13
0.7
SW
13
0.6
SW
15
0.9
SW
14
1.7
SW
18
Wave Graph
Metric surfscale
Energy kJ
8055
10592
3377
2416
1418
1929
1343
890
711
680
854
563
482
352
215
167
134
272
1922
Wind (km/h)
30
WNW
25
WSW
25
WSW
10
NW
10
NW
10
SW
15
NNW
15
NNW
5
WNW
5
N
10
E
10
ESE
10
SSW
10
SSE
5
S
0
N
5
NNW
5
S
15
N
Wind State
cross-off
off
off
cross-off
cross-off
cross-off
cross-off
cross-off
off
cross
on
on
cross-off
cross
cross
glassy
cross-off
cross
cross
High Tide
5:23AM1.65m
7:37PM1.74m
5:45AM1.53m
9:07PM1.67m
6:06AM1.41m
10:43PM1.71m
7:14AM1.29m
11:50PM1.81m
10:52AM1.33m
00:32AM1.91m
12:05PM1.48m
1:03AM2.01m
Low Tide
00:08AM1.11m
12:11PM0.44m
00:56AM1.26m
12:56PM0.56m
3:19AM1.37m
2:08PM0.69m
6:21AM1.29m
4:01PM0.74m
6:44AM1.17m
5:21PM0.71m
7:04AM1.03m
6:16PM0.66m
part cloud
part cloud
clear
clear
clear
clear
part cloud
part cloud
light rain
light rain
mod rain
light rain
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:03
7:01
7:00
6:58
6:58
6:56
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:52
5:53
5:54
5:55
5:57
5:58
 mm
1
4
8
4
Temp °C
12
13
12
8
14
14
12
17
15
13
11
12
13
14
13
13
16
15
12
Feels °C
7
7
6
5
11
12
9
15
14
11
9
10
12
13
12
12
14
13
9
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  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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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