Surf Forecasts:
Marengo surf forecast from 20 Jul 2026:
- Best quality surf: Thursday 23 Jul, 7AM (local time) - 15ft (4.5m), 14s period, SW swell with offshore winds.
- Most powerful swell: Friday 24 Jul, 4AM (local time) - 18ft (5.5m), 15s period, SW swell with 14,506 kJ wave energy.
- Next surfable swell (1★+): Tuesday 21 Jul, 4AM (local time) - 3.5ft (1.1m), 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 Tuesday (Jul 21) at 4AM. The primary swell is predicted to be 1.1m and 15s period with a secondary swell of 0.2m 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 4AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 3s period and expected on Monday (Jul 27) at 10AM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4AM (Tue 21st Jul) | 3.5ft (1.1m) 15s |
| Best Surf | 7AM (Thu 23rd Jul) | 15ft (4.5m) 14s |
| Most Powerful | 4AM (Fri 24th Jul) | 18ft (5.5m) 15s |
Table - best surf conditions forecast for Marengo over the next 16 days.
The Lowdown
Alright, let’s break it down. Rusty here, with the lowdown on Marengo.
Marengo (Marengo)
We’ve got a bit of a slow start, so don’t bother paddling out on Tuesday or Wednesday morning unless you’re just looking for a tiny, clean one. The water’s about normal for this time of year.
It kicks off Wednesday afternoon. A solid 6ft swell from the SW rolls in with a clean offshore breeze. The energy is building (1585 combined), and it’s a decent start.
Thursday, July 23rd, is the big one. A proper 15ft SW groundswell with a long 14-second period. The morning is a bit cross-off, but the afternoon goes full offshore with a fresh breeze. The energy is massive (11227). This is for experts only – the size and power are serious. The swell direction (SW) is perfect for Marengo, so it’ll line up beautifully on the reef and point.
Friday, the 24th, drops a bit but is still solid at 12ft, with a very long 16-second period from the SSW. Clean offshore winds all day. A long period groundswell like this is a dream for a point break – it’ll wrap in and give you long, drawn-out waves. The energy is still strong (4327-6233).
Saturday, the 25th, is another standout. The morning is epic with 15ft SW swell, offshore wind, and the forecast calling it exceptional for experts. The energy is pumping (8106). The afternoon gets a bit rainy, but the morning is the gold.
We get a breather Sunday and Monday with smaller, clean 5ft to 6ft swells. Offshore wind makes it tidy but not the heavy stuff. Tuesday, the 28th, sees another pulse of 10ft SW swell with a very long 16-second period. The afternoon is glassy and clean – a real treat for the experienced surfer.
Wednesday the 29th and Thursday the 30th are still big (10ft to 12ft) but the wind is more cross-off, so the quality isn’t as sharp. The energy is there, but it’s less clean.
Friday, July 31st, is a mixed bag. The morning has a big 12ft SW swell and almost no wind, but it’s light cross-onshore, so it’s a bit bumpy. The afternoon turns onshore and messy.
The first week of August fades out. Saturday the 1st is small and choppy, and Sunday the 2nd and Monday the 3rd are pretty poor – small, weak, and windy. The energy drops right off. There’s a decent pulse on Tuesday the 4th with a 5ft SW swell and a very long 19-second period, but it’s clean and cross-off, so it’s a sneaky good session for the keen ones.
The absolute standout is Thursday, July 23rd, afternoon. That’s the heavyweight. Big swell, perfect offshore wind, and a long period. If you’re an expert, that’s your session. The Saturday morning on the 25th is a close second. For the rest of the month, it’s big and powerful with clean windows, but that first pulse is the real magic.
- Rusty
Short Range ForecastModerate rain (total 11mm), heaviest on Wed morning. Very mild (max 14°C on Tue morning, min 8°C on Wed night). Winds increasing (light winds from the NNW on Tue morning, fresh winds from the WSW by Thu afternoon). | Days 5-7 Weather SummaryLight rain (total 8mm), mostly falling on Fri afternoon. Very mild (max 13°C on Fri afternoon, min 10°C on Thu night). Winds decreasing (fresh winds from the WSW on Thu night, light winds from the W by Sat night). | ||||||||||||||||||
Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | Saturday 25 | Sunday 26 | ||||||||||||||
Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||
Wave Height (m) Direction Period (s) | SW 15 | SW 14 | SW 13 | SW 14 | SW 12 | SW 13 | SW 14 | SW 14 | SW 14 | SW 15 | SSW 16 | SSW 15 | SW 14 | SW 13 | SW 12 | SSW 12 | SW 11 | SSW 11 | SW 10 |
Wave Graph  | |||||||||||||||||||
 kJ | 318 | 532 | 400 | 149 | 244 | 1112 | 5341 | 7453 | 8512 | 7557 | 6211 | 4230 | 7565 | 6085 | 5093 | 1158 | 503 | 242 | 266 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | cross-off | off | off | cross-off | off | cross-off | off | off | off | off | off | off | off | off | off |
High Tide | 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 | 10:37PM0.65m | 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 | |||||||
 |  |  |  |  | |  | | | | |  | | | | | | | | |
 | — | 7:37 | — | — | 7:35 | — | — | 7:35 | — | — | 7:35 | — | — | 7:33 | — | — | 7:33 | — | — |
 | — | — | 5:25 | — | — | 5:27 | — | — | 5:27 | — | — | 5:28 | — | — | 5:29 | — | — | 5:30 | — |
mm | — | — | — | 1 | 2 | 1 | 4 | 2 | 1 | 1 | — | 2 | 2 | 1 | 2 | — | — | — | — |
Temp °C | 11 | 14 | 14 | 12 | 11 | 12 | 9 | 10 | 10 | 11 | 12 | 13 | 13 | 13 | 12 | 11 | 13 | 12 | 12 |
Feels °C | 8 | 12 | 11 | 8 | 6 | 6 | 3 | 3 | 2 | 2 | 5 | 8 | 8 | 8 | 7 | 9 | 8 | 8 | 9 |
Swell 1 Height (m) Direction Period (s) | SW 15 | SW 14 | SW 13 | WSW 12 | SW 12 | SW 13 | SW 14 | SW 14 | SW 14 | SW 16 | SSW 16 | SSW 15 | SSW 14 | SSW 13 | SSW 12 | SSW 12 | SW 11 | SSW 11 | SW 10 |
| kJ | 318 | 532 | 400 | 127 | 244 | 473 | 1521 | 2383 | 2509 | 4295 | 6211 | 4230 | 2939 | 2021 | 1715 | 1158 | 503 | 242 | 266 |
Swell 2 Height (m) Direction Period (s) | SSW 10 | E 11 | E 11 | SW 14 | SW 15 | E 10 | — | — | SW 18 | — | SSE 15 | S 14 | — | — | — | — | SW 12 | SW 12 | S 10 |
| kJ | 10 | 2 | 2 | 149 | 55 | 2 | — | — | 206 | — | 22 | 97 | — | — | — | — | 37 | 142 | 17 |
Swell 3 Height (m) Direction Period (s) | E 11 | — | — | E 11 | E 10 | — | — | — | — | — | — | — | — | — | — | — | SW 16 | WSW 16 | WSW 11 |
| kJ | 2 | — | — | 2 | 2 | — | — | — | — | — | — | — | — | — | — | — | 11 | 25 | 12 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | NW 2 | SW 13 | SW 14 | SW 14 | SW 14 | SW 15 | — | — | SW 14 | SW 13 | SW 12 | — | — | — | — |
| kJ | — | — | — | — | 1 | 1112 | 5341 | 7453 | 8512 | 7557 | — | — | 7565 | 6085 | 5093 | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 21 | 21 | 59 | 0 | 59 | 644 | 600 | 2 | 38 | 59 | 0 | 2 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in Cape Otway | |||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||
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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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