Marengo Surf Break

Lat Long: 38.78° S 143.67° E

Marengo Surf Forecast and Surf Report

Issued: 3 pm 04 Aug 2026 (local time)

Forecast update in  hr  min

Today's Marengo sea temperature is
14.3° 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 4 Aug 2026:

  • Best quality surf: Wednesday 5 Aug, 4PM (local time) - 6ft (1.9m), 14s period, SW swell with offshore winds.
  • Most powerful swell: Monday 10 Aug, 4PM (local time) - 18ft (5.5m), 16s period, WSW swell with 14,744 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 5 Aug, 1AM (local time) - 6ft (1.9m), 8s 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 (Aug 05) at 1AM. The primary swell is predicted to be 1.9m and 8s period with a secondary swell of 1.2m and 9s. Another secondary swell of 0.8m and 14s 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 5.5m 16s and forecast to arrive on Monday (Aug 10) at 4PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 7s period and expected on Sunday (Aug 09) at 4PM.

Wave TypeTime (AEST) & Date Wave Height & Period
Next good surf (1 star+) 1AM (Wed 5th Aug)6ft (1.9m) 8s
Best Surf 4PM (Wed 5th Aug)6ft (1.9m) 14s
Most Powerful 4PM (Mon 10th Aug)18ft (5.5m) 16s

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


The Lowdown

Alright folks, Rusty here. Let’s have a look at what’s on the cards for our local patch at Marengo.

We’re looking at a solid run of surf coming up, but the first few days are a bit of a mixed bag of wind and swell. The wait is worth it though, because there’s a serious pulse of energy on the horizon.

The week kicks off on Tuesday afternoon, the 4th of August. We’ve got a 8ft SW swell running, but the wind is a cross-off at 15 mph, making things a bit lumpy. The combined energy is strong at 2164, but the conditions are only marginal. It’s a start.

Wednesday morning, the 5th, drops a bit to 4ft but the period jumps to 15 seconds. That’s proper groundswell energy. The wind is lighter, still cross-off, and the water temp is sitting at 58°, which is about average for this time of year. Wednesday afternoon is where it gets interesting. The wind swings to a clean offshore from the WSW at 12 mph, and the swell bumps up to 6ft from the SW with a 14-second period. This is a sweet spot – clean, offshore, and a solid chest-to-head high wave. The energy is strong at 1967, and this is a real standout for the week.

Thursday the 6th is a washout with small swell, and Friday the 7th sees a return to around 5ft SW groundswell with light winds. It’s clean but nothing to get overly excited about. Saturday the 8th is a write-off with messy cross-shore winds.

Now, Sunday the 9th is a flat, windy mess. But hold on, because Monday the 10th of August is the first real standout. The morning brings a clean offshore wind from the W at 15 mph and a 6ft SW swell with a 19-second period. That’s a very long-period groundswell. The energy is huge at 2429. This is for experienced surfers only, as it’s a powerful, clean wave. The afternoon goes huge – 18ft from the WSW – but that’s borderline too big for this break, and the wind is cross-off again. The energy reading is off the charts at 17769.

The second week is a big-swell period. Tuesday the 11th is blown out by strong winds, but Wednesday the 12th of August is another massive standout. We’re looking at a 15ft SW swell with a 17-second period in the morning, and the wind is a clean cross-off. The energy is 19132. By the afternoon, it’s 20ft from the WSW with a strong offshore wind at 25 mph. That’s a monster. The energy is 21173. This is strictly for experts – the swell is too big for almost everyone, and paddling in will be a battle. The setup is more interesting for kite surfing than paddle surfing at this size.

Things settle down a bit from Thursday the 13th through the weekend. We’ve got consistent 10ft to 7ft SW groundswell with moderate to light offshore winds. The 15-second periods keep the quality high. The best of this run is Friday the 14th and Saturday the 15th of August, with clean, offshore wind and excellent conditions forecast. The water is still about average for the time of year.

Monday the 17th and Tuesday the 18th see the swell drop a little, and the wind turns onshore, making conditions marginal. The last few days of the forecast, Wednesday the 19th, are small and clean but not worth a special trip.

The true standout windows are Wednesday afternoon, the 5th of August, for a clean, offshore session on a solid 6ft SW groundswell, and the big-wave days on Monday the 10th and Wednesday the 12th of August for experienced surfers only. The long-range stuff from the 13th to the 15th looks promising but is less certain.

Rusty.

Short Range Forecast

Moderate rain (total 11mm), heaviest on Tue afternoon. Very mild (max 13°C on Fri morning, min 8°C on Wed night). Wind will be generally light.

Days 5-7 Weather Summary

Moderate rain (total 17mm), heaviest on Sun morning. Very mild (max 16°C on Sat morning, min 10°C on Fri night). Winds increasing (calm on Fri night, strong winds from the WSW by Sun night).

Tue
4
Wednesday
5
Thursday
6
Friday
7
Saturday
8
Sunday
9
Monday
10
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
3
3
2
4
2
1
2
3
3
3
2
1
1
0
0
0
0
4
7
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2.3
SW
11
1.9
SW
8
1.3
SSW
15
1.9
SW
14
0.7
SW
17
0.7
SW
16
0.8
SW
16
1
SW
17
1.4
SW
16
1.2
SW
15
1.4
SW
17
1.4
SW
16
1.4
SW
15
1.2
SW
15
1
SW
14
0.7
SW
16
0.9
SW
21
1.9
SW
19
5.5
WSW
16
2.4
SW
16
Wave Graph
Metric surfscale
Energy kJ
1317
511
711
1378
290
248
299
594
894
640
1098
1014
927
623
401
264
649
2423
14744
2796
Wind (km/h)
25
SW
20
WSW
15
SW
20
WSW
10
NW
20
NW
25
WSW
10
W
10
NW
10
NW
10
N
20
N
20
N
20
N
35
NNE
35
N
45
WSW
25
W
25
WNW
25
NW
Wind State
cross-off
off
cross-off
off
cross-off
cross-off
off
off
cross-off
cross-off
cross
cross
cross
cross
cross
cross
off
off
cross-off
cross-off
High Tide
4:19PM2.00m
4:03AM2.02m
5:00PM2.02m
4:27AM1.93m
5:46PM2.00m
4:53AM1.85m
6:41PM1.95m
5:22AM1.77m
7:49PM1.89m
5:59AM1.68m
9:15PM1.87m
6:52AM1.57m
10:40PM1.93m
Low Tide
10:10PM0.69m
10:29AM0.25m
10:47PM0.82m
11:00AM0.18m
11:25PM0.97m
11:37AM0.15m
00:09AM1.14m
12:20PM0.18m
1:06AM1.29m
1:16PM0.26m
2:53AM1.40m
2:32PM0.36m
rain showers
rain showers
rain showers
clear
cloud
light rain
rain showers
clear
part cloud
part cloud
part cloud
part cloud
cloud
light rain
mod rain
light rain
rain showers
rain showers
part cloud
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:24
7:22
7:22
7:20
7:20
7:18
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:37
5:37
5:38
5:39
5:40
5:42
5:43
 mm
3
4
2
1
1
2
6
4
3
2
3
Temp °C
12
11
12
12
10
11
12
11
13
13
12
16
16
14
11
11
10
10
10
10
Feels °C
7
7
8
7
7
7
7
7
10
11
10
12
12
10
4
4
5
4
4
3
  • Map Icons:
  • Break
  • 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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