Marengo Surf Break

Lat Long: 38.78° S 143.67° E

Marengo Surf Forecast and Surf Report

Issued: 9 am 05 Sep 2026 (local time)

Forecast update in  hr  min

Today's Marengo sea temperature is
14.0°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 5 Sep 2026:

  • Best quality surf: Wednesday 9 Sep, 1PM (local time) - 15ft (4.5m), 19s period, SW swell with cross-offshore winds.
  • Most powerful swell: Wednesday 9 Sep, 7PM (local time) - 20ft (6.0m), 18s period, SW swell with 21,233 kJ wave energy.
  • Next surfable swell (1★+): Sunday 6 Sep, 7AM (local time) - 4.5ft (1.4m), 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 Sunday (Sep 06) at 7AM. The primary swell is predicted to be 1.4m and 14s period with a secondary swell of 1.5m and 8s. 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 6.0m 18s and forecast to arrive on Wednesday (Sep 09) at 7PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 6s period and expected on Monday (Sep 07) at 4AM.

Wave TypeTime (AEST) & Date Wave Height & Period
Next good surf (1 star+) 7AM (Sun 6th Sep)4.5ft (1.4m) 14s
Best Surf 1PM (Wed 9th Sep)15ft (4.5m) 19s
Most Powerful 7PM (Wed 9th Sep)20ft (6.0m) 18s

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


The Lowdown

Alright, Rusty here. Let’s have a look at what’s cooking at Marengo over the next couple of weeks.

First up, that water temp is sitting around 57°, which is about what you’d expect for this time of year, nothing wild there.

The week kicks off with a bit of a mixed bag. Saturday the 5th has some solid 7ft SW swell rolling in, but that 19-22 mph wind is going to mess with the surface, leaving it clean but a bit blown out. Not the one to get excited about.

Sunday the 6th is where it starts to feel better. The swell drops a touch to 4-5ft from the SW, but the offshore wind swings in – gentle on the morning, moderate in the arvo – and the combined swell energy is a moderate 1039, dropping to 734. It’s clean, it’s shaping up. This is a good day for a beginner to get out there and feel the glide.

Monday the 7th is a weird one. The morning is tiny at 2ft, but the afternoon jumps to 7ft from the SW, but with a short period of 8 seconds, so it’ll be a bit lumpy and weak. Combined energy sits at 1145. It’s surfable, but not pretty.

Now, Tuesday the 8th is a real standout. The swell is 4ft to 5ft from the SW, but the period stretches out to 17-18 seconds – that’s proper groundswell. That combined energy is a solid 1367 to 1588. With a light W wind offshore and glassy conditions, the point and reef setup at Marengo is going to be clean. This is for the experienced crew; the water will have that long-period push and longer lulls.

Wednesday the 9th gets intense. The swell pumps up to 13ft in the morning and a massive 20ft in the afternoon from the SW, with a very long 16-18 second period. The combined energy is enormous, over 30,000 in the arvo. Look, this is expert-only territory, and even then, it’s going to be a beast. The reef will hold it, but it’s not for the faint-hearted. The wind is moderate offshore and cross-off, but the sheer size is the story.

Thursday the 10th still has plenty of power, 12ft to 13ft SSW at 16-17 seconds. The wind is looking better, offshore and glassy at times, but again, this is for experienced surfers only with that size.

Friday the 11th is a nice drop back to 8ft to 8ft SW, period at 14 seconds. Cross-off wind and light breezes keep it clean. The energy is moderate at around 2185. A solid, surfable day without the jeopardy of the big stuff.

Saturday the 12th is a beauty. The swell is 6ft to 7ft from the SW with a 15-16 second period. The wind is glassy – dead calm in the morning, and a glassy 3 mph from the east in the arvo. That’s about as clean as it gets. Combined energy is moderate at 1384 to 2045. This is the other real standout for the fortnight. Grab it.

After that, the swell fades. Sunday the 13th drops to 4-5ft, then Monday the 14th is tiny at 2-3ft. The week of the 15th picks up again, but it’s a mixed bag of onshore and cross-shore winds. The swell bumps back to 8ft on the morning of the 15th but it gets a bit choppy. The 16th has more solid groundswell but the wind is cross-off. The 17th and 18th are small and marginal. The last weekend on the 19th and 20th shows some swell returning to 4-6ft with long periods, but the onshore and cross-shore winds mean it won’t be the cleanest.

If I’m being honest, the best windows are Tuesday the 8th for that long-period, clean offshore glass, and Saturday the 12th for the glassy conditions and solid SW groundswell. Don’t sleep on those. The mid-week big stuff is for the brave.

Rusty.

Short Range Forecast

Light rain (total 4mm), mostly falling on Sat morning. Very mild (max 15°C on Sat morning, min 6°C on Mon night). Winds decreasing (fresh winds from the W on Sat night, light winds from the WNW by Mon night).

Days 4-6 Weather Summary

Light rain (total 2mm), mostly falling on Tue night. Very mild (max 13°C on Tue morning, min 9°C on Tue night). Winds decreasing (fresh winds from the SW on Tue night, light winds from the WSW by Thu night).

Saturday
5
Sunday
6
Monday
7
Tuesday
8
Wednesday
9
Thursday
10
Friday
11
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
2
4
3
3
4
1
2
4
4
4
7
7
!
8
6
5
4
4
4
3
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2.1
SW
15
2.1
SW
15
3
SW
13
1.4
SW
14
1.3
SW
14
2.2
WSW
12
1.3
SSW
7
2.2
SW
8
1.6
SSW
14
1.2
SW
18
1.6
SW
17
4.5
SW
16
4
SW
16
6
SW
18
4
SW
18
4
SSW
17
3.5
SSW
16
2.5
SW
15
2.3
SW
14
2.4
SSW
14
2.4
SSW
16
Wave Graph
Metric surfscale
Energy kJ
1882
1907
3581
821
612
1369
164
632
969
881
1519
8787
8168
20936
10939
8498
5702
3297
2185
2313
2680
Wind (km/h)
30
NW
35
WNW
35
WSW
15
WSW
25
W
15
W
20
WSW
20
SSW
10
WSW
15
W
25
W
30
SW
25
SW
30
SW
20
SW
15
WSW
20
WSW
10
W
10
SW
15
SSW
5
N
Wind State
cross-off
off
off
off
off
off
cross-off
cross-off
cross-off
off
off
cross-off
cross-off
cross-off
cross-off
cross-off
off
off
cross-off
cross-off
cross
High Tide
6:06PM2.01m
4:57AM1.76m
7:10PM1.86m
5:37AM1.63m
8:43PM1.77m
6:47AM1.48m
10:19PM1.79m
9:33AM1.43m
11:28PM1.87m
11:23AM1.61m
00:17AM1.97m
12:30PM1.85m
00:56AM2.06m
Low Tide
11:05AM0.10m
11:43PM1.09m
11:49AM0.22m
00:37AM1.23m
12:46PM0.40m
2:34AM1.31m
2:18PM0.59m
4:53AM1.19m
4:21PM0.66m
5:54AM0.97m
5:43PM0.62m
6:36AM0.75m
6:42PM0.57m
rain showers
thunderstorm
part cloud
clear
part cloud
part cloud
rain showers
clear
clear
clear
clear
rain showers
cloud
clear
part cloud
part cloud
part cloud
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:43
6:41
6:39
6:37
6:37
6:35
6:33
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:06
6:06
6:07
6:07
6:08
6:09
6:10
 mm
1
2
1
2
Temp °C
15
13
13
14
13
12
12
11
9
13
12
11
11
12
11
11
12
11
12
11
9
Feels °C
9
6
7
12
8
8
8
6
6
8
7
5
4
5
5
7
8
9
9
8
7
  • 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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