Marengo Surf Break

Lat Long: 38.78° S 143.67° E

Marengo Surf Forecast and Surf Report

Issued: 9 am 20 Jul 2026 (local time)

Forecast update in  hr  min

Today's Marengo sea temperature is
14.6° C
0.9° 

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


Marengo surf forecast from 20 Jul 2026:

  • Best quality surf: Wednesday 22 Jul, 10PM (local time) - 11ft (3.5m), 11s period, SW swell with offshore winds.
  • Most powerful swell: Friday 24 Jul, 1PM (local time) - 18ft (5.5m), 15s period, SW swell with 13,467 kJ wave energy.
  • Next surfable swell (1★+): Monday 20 Jul, 4PM (local time) - 2.5ft (0.7m), 15s 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 Monday (Jul 20) at 4PM. The primary swell is predicted to be 0.7m and 15s period with a secondary swell of 0.3m and 10s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Marengo in the next 16 days are 5.5m 15s and forecast to arrive on Friday (Jul 24) at 1PM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 2s period and expected on Wednesday (Jul 22) at 10AM.

Wave TypeTime (AEST) & Date Wave Height & Period
Next good surf (1 star+) 4PM (Mon 20th Jul)2.5ft (0.7m) 15s
Best Surf10PM (Wed 22nd Jul)11ft (3.5m) 11s
Most Powerful 1PM (Fri 24th Jul)18ft (5.5m) 15s

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


The Lowdown

Alright folks, Rusty here with a look at the next few weeks at Marengo. This is a reef and point setup, so it handles direction well, and it's fairly consistent, so there's plenty to talk about.

The water's sitting at 58°, which is pretty much bang on average for this time of year, so no surprises there.

The week kicks off on Monday the 20th with a modest 3 ft swell from the WSW, carrying a long period of 16 seconds. The wind is a light cross-off from the NNW, keeping things clean. It's a little on the small side, but with that long period, the waves will have some shape. The energy is weak (359), so don't expect much push. The real standout action starts to build from Tuesday the 21st, with the swell jumping to 4 ft out of the SW on a 14-second period. The wind stays light and cross-off, and the energy is now moderate (532). This is a solid morning session.

Wednesday the 22nd gets a bit messy. The morning is okay with 3 ft, but the wind picks up to a moderate breeze. The afternoon sees a jump in size to 6 ft, but the wind swings to the WSW and howls at 16 mph, and that rain starts. The energy is strong (1563), but the conditions are marginal. This is more of a kite surfer's setup than a clean paddle session.

Alright, now for the real deal. Thursday the 23rd is not for the faint of heart. We're looking at a massive 15 ft SW swell on Thursday morning, with a very strong energy reading (11005). The wind is up, but it's cross-off. By the afternoon, the wind shifts to offshore, making it a bit cleaner, but the swell is still 12 ft. This is expert territory only, and even then, it's a handful.

Friday the 24th is the absolute standout of the first week. We're talking a 16 ft to 18 ft SW groundswell, with a period of 15-16 seconds. The energy is enormous (18024), and the wind is fresh offshore from the W. This is a proper big-wave day for experts only. The sets will be huge, clean, and powerful. Saturday the 25th holds onto the size with 13 ft, but the wind, while still offshore, is a bit stronger, and the period drops a touch. Still massive, still for experts.

The surf drops back a bit by Sunday the 26th, with a 6 ft SSW swell and a moderate offshore wind. This is a much more manageable size, and the energy is lower (785). The afternoon sees an 8 ft WSW swell, offering excellent conditions for experienced surfers.

The following week is all about the long-period groundswell. Monday the 27th through Wednesday the 29th sees consistent 7 ft to 8 ft swell from the SSW and SW. The wind is a mix of cross-off and glassy conditions, particularly on the afternoon of Tuesday the 28th and the afternoon of Wednesday the 29th, when it goes glassy. The energy is strong (2211 to 3080). These are the best days for the average experienced surfer, with clean, lined-up waves from a long-period groundswell that will really work on this point.

Thursday the 30th and Friday the 31st are still good, but the swell drops a bit. The Thursday afternoon looks glassy on a 5 ft SW swell. The energy is moderate (898). It's a lovely, clean session.

The very end of the run, from Saturday the 1st of August, gets silly. The swell pumps up to 21 ft and 20 ft from the SW, with periods of 16-17 seconds and energy readings over 27000. It's way too big for this break, even for experts. The wind is cross-shore, so it's a mess. This is a code red, stay-on-the-beach situation.

So, the true standouts are Friday the 24th for the most extreme, big-wave, offshore perfection (16 ft SW, offshore wind) and the afternoon of Wednesday the 29th (8 ft SSW, glassy) and the afternoon of Tuesday the 28th (7 ft SSW, light breeze) for the cleanest, most manageable sessions with excellent energy.

Rusty.

Short Range Forecast

Light rain (total 9mm), mostly falling on Wed morning. Very mild (max 14°C on Mon afternoon, min 8°C on Wed night). Wind will be generally light.

Days 4-6 Weather Summary

Moderate rain (total 10mm), heaviest on Thu morning. Very mild (max 13°C on Fri afternoon, min 10°C on Thu morning). Mainly fresh winds.

Monday
20
Tuesday
21
Wednesday
22
Thursday
23
Friday
24
Saturday
25
Sunday
26
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
2
1
2
2
2
1
0
2
3
7
5
8
8
7
8
5
5
2
3
4
4
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.8
WSW
16
0.7
SW
15
0.9
SW
15
1.2
SW
14
1.1
SW
13
0.6
SW
14
0.8
SW
12
1.8
SW
13
2
SW
12
4.5
SW
14
3.5
SW
14
5
SW
15
5
SW
16
5.5
SW
15
5
SW
14
4
SW
13
4
SW
12
2.1
SW
12
1.7
SSW
11
2.5
WSW
12
2.5
WSW
11
Wave Graph
Metric surfscale
Energy kJ
326
220
318
532
400
149
175
1034
1225
8330
5012
11210
11928
12146
9808
5547
5285
1162
681
1989
1643
Wind (km/h)
10
NNW
10
NNW
15
NNW
15
NNW
10
NNW
20
NNW
20
NW
25
WSW
20
WSW
25
WSW
30
WSW
30
WSW
35
W
35
W
30
W
30
W
30
W
25
WSW
20
WNW
25
WSW
20
W
Wind State
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
off
cross-off
off
off
off
off
off
off
off
cross-off
off
off
off
High Tide
4:48PM1.99m
4:40AM2.10m
5:40PM1.96m
5:12AM1.95m
6:35PM1.90m
5:44AM1.79m
7:37PM1.83m
6:15AM1.64m
8:47PM1.79m
6:48AM1.51m
10:02PM1.80m
7:34AM1.41m
11:14PM1.86m
Low Tide
10:31AM0.31m
10:37PM0.65m
11:09AM0.27m
11:22PM0.82m
11:48AM0.28m
00:10AM0.99m
12:28PM0.34m
1:06AM1.15m
1:12PM0.42m
2:29AM1.28m
2:07PM0.50m
4:25AM1.33m
3:17PM0.56m
cloud
cloud
cloud
cloud
cloud
light rain
rain showers
light rain
rain showers
rain showers
part cloud
part cloud
part cloud
light rain
rain showers
rain showers
rain showers
part cloud
rain showers
rain showers
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:37
7:37
7:35
7:35
7:35
7:33
7:33
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:24
5:25
5:27
5:27
5:28
5:29
5:30
 mm
1
4
2
2
2
2
3
1
2
1
2
Temp °C
13
14
11
14
14
12
11
11
9
10
11
11
12
13
13
13
12
12
12
13
12
Feels °C
10
11
8
11
12
8
7
5
3
3
3
3
4
7
7
8
6
6
7
9
8
  • 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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