Marengo Surf Break

Lat Long: 38.78° S 143.67° E

Marengo Surf Forecast and Surf Report

Issued: 3 pm 02 Sep 2026 (local time)

Forecast update in  hr  min

Today's Marengo sea temperature is
14.2°C
1.1° 

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


Marengo surf forecast from 2 Sep 2026:

  • Best quality surf: Thursday 3 Sep, 7PM (local time) - 18ft (5.5m), 14s period, WSW swell with offshore winds.
  • Most powerful swell: Thursday 3 Sep, 4PM (local time) - 18ft (5.5m), 14s period, WSW swell with 12,490 kJ wave energy.
  • Next surfable swell (1★+): Thursday 3 Sep, 7PM (local time) - 18ft (5.5m), 14s period with WSW 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 Thursday (Sep 03) at 7PM. The primary swell is predicted to be 5.5m and 14s period with a secondary swell of 3.0m and 15s. Another secondary swell of 0.2m and 16s 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 14s and forecast to arrive on Thursday (Sep 03) at 4PM. 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 4s period and expected on Thursday (Sep 03) at 7AM.

Wave TypeTime (AEST) & Date Wave Height & Period
Next good surf (1 star+) 7PM (Thu 3rd Sep)18ft (5.5m) 14s
Best Surf 7PM (Thu 3rd Sep)18ft (5.5m) 14s
Most Powerful 4PM (Thu 3rd Sep)18ft (5.5m) 14s

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


The Lowdown

G’day, Rusty here. Let’s break down what’s on tap for Marengo over the next couple weeks.

First real surf hits Wednesday the 2nd of September. That afternoon we’ve got a 7ft swell from the SW with a long 15 second period. Wind is cross-off from the WNW at 12 mph, so the face is clean. The combined energy is 1781, decent but not amazing. It’s a warm-up.

Thursday the 3rd is a beast. The swell jumps to 18ft from the WSW with a 14 second period. Wind is straight offshore from the W, blowing 22 mph in the morning and 19 mph in the afternoon. That’s fresh offshore and clean, but at 18ft, this is heavy, serious stuff. The combined energy is massive: 14153 in the morning and 15909 in the afternoon – that’s strong to very strong wave energy. This is for experts only. Marengo is a reef and point break, so that long-period swell will wrap in nicely, but you better know what you’re doing. The water temp is 58°, which is a touch warmer than normal for this time of year.

Friday the 4th drops to 10ft in the morning and 8ft in the afternoon, still from the SW with a 16-second period – beautiful, long lines. The wind is cross-off, clean, and the energy is moderate at 3866 and 3624. A solid, manageable day.

Saturday the 5th gets messy. That 7ft to 12ft SW swell is there, but the wind is howling at 25-28 mph from the WNW and W. It’s offshore, but it’s strong, making it a fight to get out. The combined energy is 6589 in the afternoon, but the roughness kills it.

Sunday the 6th is a nice little gem. The morning has 7ft SW swell, 14 second period, and gentle offshore wind from the WSW at 9 mph. The energy is 1550, and it’s clean. The afternoon drops to 5ft, but still clean. A solid day for a paddle.

Monday the 7th holds around 7ft to 5ft, SW/WSW, 13 seconds, with light cross-off winds. Clean, consistent, nothing wild.

Here’s the standout: Tuesday the 8th. Morning has 4ft from the SW with a 18-second period – that’s a very long groundswell. The wind is light offshore from the WSW at 6 mph, glassy clean. The energy is 1485. The afternoon builds to 6ft with a 17-second period, still offshore at 12 mph. That’s a proper point-break day at Marengo – long, clean lines, manageable size. Best on offer.

Wednesday the 9th sees a jump to 7ft and then 10ft with a 20-second period in the afternoon. That’s another very long-period swell, but the wind is a cross-off from the SW at 19-22 mph, so it’s clean but a bit bumpy. The energy is 2771 and 7942 – strong.

Thursday the 10th is the big one for the experts. 13ft in the morning from the SSW, 18-second period, with light cross-off winds. The energy is 9150 – very strong. Afternoon is 12ft, 17 seconds, still light. If you’re a charger, this is your window. Too big for anyone else.

After that, the second week gets smaller and more inconsistent. Friday the 11th through Saturday the 12th has 4ft to 7ft, mostly cross winds, nothing special. Sunday the 13th has a glassy afternoon with 4ft SW swell and a 16-second period – that’s a nice little session if you’re patient.

Monday the 14th is a beauty: 10ft in the morning from the SW, 16 seconds, clean, with a 4381 energy. The afternoon goes glassy with 0 wind and 8ft, 17 seconds. That’s a top-tier session.

Tuesday the 15th has a 13ft bomb in the afternoon from the WSW, 14 seconds, with light cross-off wind. Energy is 8799 – strong punch. Another expert-only moment.

The last few days, Wednesday the 16th and Thursday the 17th, fade back to 6ft to 12ft, with clean offshore winds on the 16th but a messy cross-off on the 17th. Nothing to chase.

Best bet for the standouts: Tuesday the 8th for the combination of long-period groundswell, light offshore winds, and manageable size. And Monday the 14th for that glassy afternoon session. Both are clean, lined up, and will have you smiling.

Rusty.

Short Range Forecast

Moderate rain (total 14mm), heaviest on Fri night. Very mild (max 15°C on Fri night, min 8°C on Thu night). Winds increasing (light winds from the WNW on Thu night, strong winds from the W by Sat morning).

Days 5-7 Weather Summary

Light rain (total 3mm), mostly falling on Sat afternoon. Very mild (max 14°C on Sun morning, min 6°C on Mon night). Winds decreasing (strong winds from the W on Sat afternoon, calm by Mon night).

Wed
2
Thursday
3
Friday
4
Saturday
5
Sunday
6
Monday
7
Tuesday
8
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
3
2
7
8
5
3
3
2
1
3
3
4
2
3
4
3
3
4
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)
2
SW
15
2.1
SW
15
5.5
WSW
14
5.5
WSW
14
3.5
SW
15
3
SW
16
2.5
SW
16
2.4
SW
16
2.2
SW
15
3.5
SW
14
3.5
SW
13
2
SW
14
1.6
SW
13
1.3
SW
12
2.1
WSW
13
1.5
SW
13
1.4
SW
12
1.3
SW
18
1.8
SW
17
1.7
SW
16
Wave Graph
Metric surfscale
Energy kJ
1776
1907
11406
12490
4739
3866
3624
2794
2150
4231
3642
1550
905
555
1427
744
558
1099
1915
1392
Wind (km/h)
20
WNW
25
NW
35
W
30
W
15
WNW
20
NW
15
NNW
30
NNW
40
WNW
45
W
25
WSW
15
WSW
15
WSW
15
W
15
WSW
15
SSW
0
ESE
10
WSW
20
WSW
25
WSW
Wind State
cross-off
cross-off
off
off
cross-off
cross-off
cross-off
cross-off
cross-off
off
cross-off
off
cross-off
off
cross-off
cross-off
glassy
off
off
off
High Tide
3:30AM1.99m
4:34PM2.25m
3:56AM1.93m
5:16PM2.15m
4:24AM1.85m
6:06PM2.01m
4:57AM1.76m
7:10PM1.86m
5:37AM1.63m
8:43PM1.77m
6:47AM1.48m
10:19PM1.79m
Low Tide
9:55PM0.70m
9:54AM0.07m
10:28PM0.82m
10:27AM0.05m
11:03PM0.95m
11:05AM0.10m
11:43PM1.09m
11:49AM0.22m
00:37AM1.23m
12:46PM0.40m
2:34AM1.31m
2:18PM0.59m
part cloud
rain showers
rain showers
part cloud
clear
part cloud
light rain
rain showers
rain showers
rain showers
part cloud
clear
clear
cloud
rain showers
part cloud
clear
clear
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:46
6:43
6:43
6:41
6:39
6:37
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:02
6:04
6:05
6:06
6:06
6:07
6:07
 mm
2
1
1
7
3
2
1
Temp °C
14
13
13
12
11
14
14
15
12
12
12
14
14
12
13
12
9
13
12
12
Feels °C
10
8
5
5
6
10
10
10
4
4
5
10
10
9
10
9
7
9
7
7
  • 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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