Marengo Surf Break

Lat Long: 38.78° S 143.67° E

Marengo Surf Forecast and Surf Report

Issued: 3 am 28 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 27 Aug 2026:

  • Best quality surf: Friday 28 Aug, 10AM (local time) - 5ft (1.6m), 18s period, SW swell with offshore winds.
  • Most powerful swell: Friday 4 Sep, 7AM (local time) - 20ft (6.0m), 13s period, WSW swell with 12,087 kJ wave energy.
  • Next surfable swell (1★+): Friday 28 Aug, 10AM (local time) - 5ft (1.6m), 18s 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 Friday (Aug 28) at 10AM. The primary swell is predicted to be 1.6m and 18s period with a secondary swell of 0.2m and 9s. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Marengo in the next 16 days are 6.0m 13s and forecast to arrive on Friday (Sep 04) at 7AM. 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 4s period and expected on Saturday (Aug 29) at 4PM.

Wave TypeTime (AEST) & Date Wave Height & Period
Next good surf (1 star+)10AM (Fri 28th Aug)5ft (1.6m) 18s
Best Surf10AM (Fri 28th Aug)5ft (1.6m) 18s
Most Powerful 7AM (Fri 4th Sep)20ft (6.0m) 13s

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


The Lowdown

G’day, Rusty here. We’ve got a solid run of surf ahead at Marengo, but only for the experienced crew – this is not a beginner’s window. The reef and point setup will be handling a powerful, long-period groundswell from the southwest, with the energy building into the moderate-to-strong range. The water temp sits at 57°F which is pretty average for this time of year, nothing unusual.

The action kicks off Friday morning, the 28th of August. The swell is already running at 1.6m from the SW with a long 18-second period, and combined energy is strong at 1536. The wind is light offshore from the west, keeping things clean. This is proper groundswell and it’s pumping, but at 1.6m with that period, the power is serious – this is for experienced surfers only. Friday afternoon stays decent with a cross-off breeze, but the tide window gets a bit questionable.

Saturday the 29th drops a touch to 1.3m, but still solid energy (736) and clean offshore winds in the morning. Great for stronger surfers who want a slightly less heavy session. Sunday the 30th sees the swell bump back up to 2-1.8m, energy climbing above 1000 again (1195-1281), and winds stay offshore. Consistent, clean, and powerful.

Now, the standout of the whole forecast – Monday the 31st of August. Morning has the swell at 1.8m with a 15-second period, combined energy at a meaty 1758, and the wind is light offshore. But the arvo? Glassy. Absolute glass. Wind switches to SSW at 5 km/h, dead calm, clean as a whistle. The swell holds at 1.8m, energy hits 1948. That is the session to clear your diary for. Perfect offshore and glassy conditions, powerful groundswell – a proper gem for those who can handle it.

Tuesday the 1st of September gets messy with strong NNW winds making things cross-off and rough, so quality drops. Wednesday the 2nd bounces back – offshore winds again, swell at 2-2.1m, energy up around 1471-1802. Another excellent window for experienced surfers. Thursday the 3rd stays punchy (2.1m, energy 1688-1618) but winds are cross-off, which takes the shine off a bit.

Friday the 4th of September is a monster – morning has 3.0m with 30 km/h offshore winds, but the afternoon blows out to 6.5m and 22219 energy. That’s way too big for this break, even for experts. Kite surfers might be eyeing it, but for paddle surfing, it’s a no-go.

The following week starts to ease. Saturday the 5th and Sunday the 6th have 2-2.4m and big energy (2175-2883), but winds are cross-off and messy. Monday the 7th of September is another potential standout – glassy offshore winds in the morning with 1.8m swell from the SSW, energy at 838. Clean and inviting, but the swell direction has shifted a bit.

After that, the window gets messy. Tuesday the 8th is onshore and wet – avoid. Wednesday the 9th has clean cross-off winds but the swell is dropping and quality is marginal. The run fades through Thursday the 10th with small 1.0-1.1m swell (543-583). Friday the 11th and Saturday the 12th of September bring new energy – Friday has 2-2.5m with big period (18 seconds) and energy climbing to 3747, but winds are cross-off again. Saturday the 12th is the real late-period highlight: morning offshore winds, 1.9m, 16-second period, energy 2583, and the arvo holds with 2.3m and 17-second period at 3087 – both sessions rated as excellent for experienced surfers. That’s worth waiting for.

Crowds are listed as “sometimes” at Marengo, so you might get a few out, but the power will keep the numbers down.

Keep an eye on Monday the 31st of August and Saturday the 12th of September – those are your best bets. The rest is either too big, too windy, or too small if you’re not in the experienced bracket.

Rusty.

Short Range Forecast

Mostly dry. Very mild (max 13°C on Sat morning, min 7°C on Fri night). Wind will be generally light.

Days 4-6 Weather Summary

Light rain (total 5mm), mostly falling on Tue night. Warm (max 20°C on Tue morning, min 9°C on Wed night). Winds increasing (calm on Mon afternoon, fresh winds from the NNW by Tue morning).

Friday
28
Saturday
29
Sunday
30
Monday
31
Tuesday
1
Wednesday
2
Thursday
3
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
4
3
3
3
2
3
3
3
4
4
4
3
2
2
1
4
4
4
3
3
7
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.6
SW
18
1.6
SW
16
1.5
SW
16
1.3
SW
14
1.3
SW
14
1.4
SSW
14
1.7
SW
13
1.8
SW
14
1.9
SW
14
1.8
SW
15
1.8
SW
15
2
SW
16
1.7
SW
16
1.4
SW
15
1.6
SW
15
1.8
SW
15
2.1
SW
15
1.8
SW
14
2.1
SW
14
2.1
SW
14
6
WSW
13
Wave Graph
Metric surfscale
Energy kJ
1518
1436
1101
736
641
690
1042
1161
1349
1380
1325
1953
1374
871
1020
1471
1784
1355
1688
1618
11202
Wind (km/h)
15
W
15
SW
10
W
15
W
20
WSW
15
W
15
WSW
20
WSW
10
W
5
W
5
SSW
15
N
30
NNW
20
NNW
25
NW
15
WSW
20
W
15
W
25
NW
20
WNW
40
W
Wind State
off
cross-off
off
off
off
off
off
off
off
off
glassy
cross
cross-off
cross-off
cross-off
off
off
off
cross-off
cross-off
off
High Tide
12:54PM1.66m
1:30AM2.07m
1:34PM1.85m
1:54AM2.10m
2:10PM2.02m
2:18AM2.10m
2:45PM2.16m
2:42AM2.08m
3:20PM2.25m
3:05AM2.04m
3:56PM2.28m
3:30AM1.99m
4:34PM2.25m
3:56AM1.93m
Low Tide
7:00PM0.61m
7:46AM0.73m
7:39PM0.57m
8:08AM0.57m
8:14PM0.56m
8:31AM0.41m
8:49PM0.57m
8:57AM0.27m
9:22PM0.62m
9:24AM0.14m
9:55PM0.70m
9:54AM0.07m
10:28PM0.82m
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
cloud
rain showers
rain showers
part cloud
part cloud
part cloud
part cloud
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:54
6:52
6:52
6:50
6:48
6:47
6:46
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:59
5:59
6:00
6:00
6:01
6:02
6:04
 mm
4
1
3
Temp °C
12
12
9
13
12
9
13
12
10
14
13
13
20
20
15
13
13
12
15
14
13
Feels °C
9
9
7
9
8
6
9
8
8
12
12
7
15
15
10
11
9
9
10
10
6
  • Map Icons:
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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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