Surf Forecasts:
How big are the waves at Portsea Back Beach today (20 Aug):
- Morning surf: Morning surf (20 Aug, local time) - 2.5ft (0.7m), 14s period with SW swell.
- Afternoon surf: Afternoon surf (20 Aug, local time) - 2ft (0.6m), 17s period with SW swell.
- Evening surf: Evening surf (20 Aug, local time) - 2.5ft (0.7m), 14s period with SW swell.
The current surf forecast for Portsea Back Beach at 1AM is: 0.7m 15s primary swell from a Southwest direction and 0.3m 20s secondary swell from a Southwest direction (forecast issued at 09:00pm August 19). An open ocean swell of 0.8m 4s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (AEST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 Aug) | 2.5ft (0.7m) | 14s |
| Afternoon (20 Aug) | 2ft (0.6m) | 17s |
| Evening (20 Aug) | 2.5ft (0.7m) | 14s |
Table - waves today at Portsea Back Beach. (Swell directed towards the surf break)
Short Range ForecastLight rain (total 3mm), mostly falling on Wed night. Very mild (max 14°C on Wed night, min 8°C on Thu night). Winds decreasing (fresh winds from the WNW on Thu afternoon, light winds from the W by Sat afternoon). | ||||||||||||||||||
Wed 19 | Thursday 20 | Friday 21 | ||||||||||||||||
7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | |
Swell Height Map |  |  |  |  |  |  |  | |||||||||||
Wave Height (m) Direction Period (s) | SW 15 | SW 15 | SW 15 | SW 14 | WSW 14 | SW 14 | SW 17 | SW 17 | SW 16 | SW 14 | SW 16 | SW 16 | SW 16 | WSW 15 | SW 15 | WSW 14 | SW 14 | SW 14 |
Wave Graph  | ||||||||||||||||||
 kJ | 226 | 217 | 217 | 211 | 239 | 186 | 232 | 173 | 183 | 186 | 502 | 587 | 739 | 770 | 893 | 1010 | 1016 | 988 |
Wind (km/h) | ||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross | cross | cross | cross-off | cross-on | cross | cross | cross-on | cross | cross | cross-on | cross | cross-on | cross | cross |
High Tide | 4:10PM1.50m | 5:00AM1.44m | 4:40PM1.46m | 5:41AM1.39m | 5:09PM1.40m | |||||||||||||
Low Tide | 10:36PM0.22m | 10:48AM0.56m | 11:11PM0.24m | 11:22AM0.65m | ||||||||||||||
 | |  | | |  | | |  | |  | | |  | | | | | |
 | — | — | — | — | 7:01 | — | — | — | — | — | — | — | 7:00 | — | — | — | — | — |
 | — | — | — | — | — | — | — | 5:47 | — | — | — | — | — | — | — | 5:49 | — | — |
mm | 3 | 1 | — | — | — | — | — | — | 1 | 1 | — | — | — | — | — | — | — | — |
Temp °C | 13 | 14 | 14 | 13 | 12 | 12 | 14 | 14 | 13 | 10 | 8 | 9 | 8 | 10 | 13 | 14 | 13 | 12 |
Feels °C | 6 | 8 | 9 | 8 | 8 | 8 | 11 | 11 | 5 | 5 | 3 | 3 | 2 | 4 | 8 | 9 | 8 | 7 |
Swell 1 Height (m) Direction Period (s) | SW 15 | SW 15 | SW 15 | SW 14 | WSW 14 | SW 14 | SW 17 | WSW 14 | SW 13 | SW 14 | SW 16 | SW 16 | SW 16 | WSW 15 | SW 15 | WSW 14 | SW 14 | SW 14 |
| kJ | 226 | 217 | 217 | 211 | 239 | 186 | 232 | 161 | 183 | 186 | 502 | 587 | 739 | 770 | 893 | 1010 | 1016 | 988 |
Swell 2 Height (m) Direction Period (s) | SE 7 | WSW 20 | SW 20 | SW 19 | SW 19 | SW 18 | WSW 13 | SW 17 | SW 16 | SW 16 | SW 7 | WSW 7 | SW 7 | SW 8 | SW 19 | SW 18 | SW 18 | SW 18 |
| kJ | 2 | 40 | 61 | 89 | 122 | 155 | 118 | 173 | 167 | 130 | 11 | 10 | 49 | 59 | 360 | 330 | 258 | 600 |
Swell 3 Height (m) Direction Period (s) | SW 15 | SE 7 | SE 8 | SE 8 | SE 9 | WSW 8 | WSW 8 | WSW 7 | SW 16 | WSW 7 | SSW 16 | — | WSW 20 | SW 20 | S 19 | — | SSW 18 | — |
| kJ | 9 | 2 | 2 | 2 | 3 | 24 | 23 | 18 | 132 | 18 | 24 | — | 76 | 99 | 7 | — | 31 | — |
Wind waves Height (m) Direction Period (s) | N 5 | N 4 | N 4 | NNW 4 | NW 4 | NW 4 | NW 3 | NW 3 | W 7 | NW 3 | WNW 4 | W 4 | NW 4 | NW 4 | WNW 4 | NW 4 | WNW 4 | WNW 4 |
| kJ | 52 | 40 | 20 | 18 | 20 | 17 | 7 | 5 | 32 | 9 | 19 | 31 | 15 | 15 | 13 | 18 | 8 | 12 |
Nearest Offshore or Glassy | ||||||||||||||||||
Distance (km) | 38 | 17 | 17 | 17 | 25 | 13 | 0 | 17 | 31 | 25 | 25 | 25 | 25 | 27 | 25 | 27 | 25 | 25 |
Best forecast wave conditions in Mornington Peninsula | ||||||||||||||||||
Best forecast wave conditions in Australia | ||||||||||||||||||
Header Global | ||||||||||||||||||
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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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