Surf Forecasts:
Wonthaggi surf forecast from 17 Aug 2026:
- Best quality surf: Tuesday 18 Aug, 1AM (local time) - 5ft (1.6m), 15s period, SW swell with offshore winds.
- Most powerful swell: Saturday 22 Aug, 7PM (local time) - 8ft (2.5m), 15s period, WSW swell with 2,997 kJ wave energy.
- Next surfable swell (1★+): Tuesday 18 Aug, 1AM (local time) - 5ft (1.6m), 15s period with SW swell.
Best Forecast Surf Conditions for Wonthaggi this week:
The surf forecast for Wonthaggi over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Aug 18) at 1AM. The primary swell is predicted to be 1.6m and 15s period. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Wonthaggi in the next 16 days are 2.5m 15s and forecast to arrive on Saturday (Aug 22) at 7PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 4s period and expected on Wednesday (Aug 19) at 4PM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Tue 18th Aug) | 5ft (1.6m) 15s |
| Best Surf | 1AM (Tue 18th Aug) | 5ft (1.6m) 15s |
| Most Powerful | 7PM (Sat 22nd Aug) | 8ft (2.5m) 15s |
Table - best surf conditions forecast for Wonthaggi over the next 16 days.
The Lowdown
G’day, Rusty here. Look, I’m gonna level with you—this 16-day stretch for Wonthaggi is mostly a story of wind-ruined potential. There’s a couple of real bright spots, but you’ve gotta pick your moments. The water’s sitting at 56°F right now, which is pretty average for this time of year, nothing weird.
The pattern kicks off on Monday the 17th with a 5ft SW groundswell – period a meaty 16 seconds – but it’s blown out by a 9 mph ESE cross-off. The energy’s pretty strong (1184) but the quality’s marginal. Tuesday the 18th morning looks more promising: clean 4ft WSW swell, 14 seconds, with a light 6 mph NE offshore. That’s your first standout – smooth, workable lines with moderate energy (789). Tuesday arvo still okay, dropping to 4ft.
Then it gets ugly. From Wednesday the 19th all the way through to Sunday the 30th, it’s a grim run of poor surf. Strong northerly and westerly winds – up to 22 mph – turn everything to chop and lump. The swell hangs around, even pushing over 8ft on Saturday the 22nd, but with onshore winds, it’s a washing machine. That 8ft WSW swell (16 sec, energy 5144) is pure grunt for experts only, and the wind’s straight on – rough. Honestly, that big swelly, windy period from the 20th to the 23rd looks more interesting for kite surfing than paddle surfing. Even the 6ft W swell on the 20th with a short 9-second period is just a mess.
Eventually the wind eases. The real highlight is Monday the 31st of August morning – glassy conditions, a crisp 5ft SW groundswell with a 14-second period, and a light ESE breeze at 3 mph. The energy is strong (1460) and it’s glassy – that’s the best on offer. That arvo drops to 3ft but with a 19-second period – very long lines – and clean cross-off wind. Tuesday the 1st of September is also worth a paddle: 4ft SW (17 sec) with a NE offshore, glassy calm by the arvo with 5ft waves (16 sec). That second week window from the 31st to the 1st is where you want to be – clean, fun, and the wind’s finally playing nice.
Remember, that long-period groundswell (over 15 seconds) can break a bit straight at a beach setup, so try to find a bank that’s working. This is Wonthaggi – it’s an inconsistent spot and sometimes it stays flat, but when it comes together like this late in the window, it’s worth the wait.
Rusty.
Short Range ForecastLight rain (total 4mm), mostly falling on Wed morning. Very mild (max 17°C on Tue morning, min 11°C on Mon night). Winds increasing (calm on Tue morning, fresh winds from the NNW by Wed afternoon). | Days 5-7 Weather SummaryLight rain (total 2mm), mostly falling on Sat morning. Very mild (max 16°C on Thu afternoon, min 11°C on Thu night). Mainly fresh winds. | |||||||||||||||||||
Mon 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | ||||||||||||||
PM | 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) | WSW 16 | SW 15 | WSW 14 | SW 14 | WSW 13 | WSW 14 | SW 15 | WSW 14 | W 9 | WSW 10 | WSW 12 | SW 15 | WSW 14 | WSW 16 | WSW 15 | WSW 16 | WSW 15 | SW 14 | WSW 13 | SW 16 |
Wave Graph  | ||||||||||||||||||||
 kJ | 1184 | 1103 | 701 | 589 | 229 | 257 | 229 | 268 | 455 | 533 | 762 | 523 | 1083 | 2542 | 2613 | 2911 | 2550 | 1824 | 1422 | 1571 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | off | off | cross-off | cross-off | cross-off | cross-off | cross | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | on | cross-on | cross | cross-on |
High Tide | 3:30AM2.27m | 3:34PM2.34m | 4:15AM2.25m | 4:10PM2.29m | 4:56AM2.20m | 4:44PM2.22m | 5:37AM2.12m | 5:17PM2.12m | 6:18AM2.02m | 5:51PM2.03m | 7:02AM1.93m | 6:27PM1.93m | ||||||||
Low Tide | 9:16PM0.22m | 9:30AM0.47m | 9:56PM0.18m | 10:10AM0.57m | 10:34PM0.19m | 10:48AM0.67m | 11:11PM0.24m | 11:25AM0.79m | 11:48PM0.31m | 12:02PM0.90m | 00:27AM0.40m | 12:42PM1.01m | 1:10AM0.49m | |||||||
 |  |  | |  |  |  |  | |  | | | | | | |  | | | | |
 | — | — | 7:01 | — | — | 7:00 | — | — | 6:58 | — | — | 6:56 | — | — | 6:56 | — | — | 6:54 | — | — |
 | 5:42 | — | — | 5:43 | — | — | 5:44 | — | — | 5:44 | — | — | 5:45 | — | — | 5:45 | — | — | 5:46 | — |
mm | — | — | — | — | — | 1 | 2 | 1 | — | — | — | — | — | — | 2 | — | — | — | — | — |
Temp °C | 16 | 14 | 17 | 17 | 17 | 15 | 14 | 14 | 14 | 16 | 12 | 13 | 13 | 13 | 12 | 12 | 12 | 12 | 13 | 12 |
Feels °C | 12 | 11 | 15 | 15 | 13 | 9 | 8 | 9 | 9 | 11 | 9 | 7 | 8 | 8 | 6 | 5 | 6 | 7 | 9 | 8 |
Swell 1 Height (m) Direction Period (s) | WSW 16 | SW 15 | WSW 14 | SW 14 | WSW 13 | WSW 14 | SW 15 | WSW 14 | WSW 13 | WSW 10 | WSW 12 | WSW 11 | WSW 14 | WSW 16 | WSW 15 | WSW 16 | WSW 15 | SW 14 | WSW 13 | SW 16 |
| kJ | 1184 | 1103 | 701 | 589 | 229 | 257 | 229 | 268 | 222 | 533 | 762 | 373 | 1083 | 2542 | 2613 | 2911 | 2550 | 1824 | 1422 | 1571 |
Swell 2 Height (m) Direction Period (s) | — | — | SW 19 | — | SW 16 | ESE 7 | ESE 7 | WSW 21 | WSW 18 | WSW 13 | — | SW 15 | WSW 18 | — | — | — | — | WSW 18 | SW 18 | — |
| kJ | — | — | 88 | — | 127 | 4 | 5 | 43 | 128 | 195 | — | 523 | 541 | — | — | — | — | 128 | 197 | — |
Swell 3 Height (m) Direction Period (s) | — | — | ESE 5 | — | ESE 4 | — | — | SE 7 | E 7 | SW 17 | — | WSW 19 | — | — | — | — | — | — | — | — |
| kJ | — | — | 10 | — | 3 | — | — | 2 | 4 | 138 | — | 251 | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | ESE 4 | E 4 | E 6 | SE 6 | NE 2 | NNE 3 | NNW 4 | NW 5 | W 9 | — | NW 4 | NW 4 | — | — | — | SW 16 | — | NW 3 | — | — |
| kJ | 13 | 10 | 30 | 8 | 1 | 3 | 46 | 47 | 455 | — | 14 | 14 | — | — | — | 2233 | — | 1 | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 34 | 7 | 7 | 33 | 7 | 60 | 60 | 11 | 102 | 16 | 7 | 41 | 23 | 102 | 103 | 117 | 103 | 41 | 11 | 16 |
Best forecast wave conditions in East Coast of Victoria | ||||||||||||||||||||
Best forecast wave conditions in Australia | ||||||||||||||||||||
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Information about the Wonthaggi Surf forecast
The above surf forecast table for Wonthaggi provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Wonthaggi can be found by selecting the local surf guide option on the grey menu. Our Wonthaggi 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 (Wonthaggi) 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 Wonthaggi 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.
Wonthaggi is 58 km (36 miles) from Cranbourne. If you plan a holiday in East Coast of Victoria, look for hotels and other accommodation in Cranbourne. Cranbourne has rooms for a wide range of budgets as well as car hire and transport links.
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