Surf Forecasts:
How big are the waves at Portsea Back Beach today (11 Aug):
- Morning surf: Morning surf (11 Aug, local time) - 5ft (1.6m), 15s period with SW swell.
- Afternoon surf: Afternoon surf (11 Aug, local time) - 5ft (1.6m), 14s period with SW swell.
- Evening surf: Evening surf (11 Aug, local time) - 5ft (1.5m), 14s period with SW swell.
The current surf forecast for Portsea Back Beach at 12AM is: 1.7m 16s primary swell from a Southwest direction and 1.0m 6s secondary swell from a South direction, 1.4m 6s secondary swell from a Southwest direction (forecast issued at 09:00pm August 10). The wind direction is predicted to be cross-onshore.
| Time (AEST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (11 Aug) | 5ft (1.6m) | 15s |
| Afternoon (11 Aug) | 5ft (1.6m) | 14s |
| Evening (11 Aug) | 5ft (1.5m) | 14s |
Table - waves today at Portsea Back Beach. (Swell directed towards the surf break)
Short Range ForecastSome drizzle, heaviest during Wed morning. Very mild (max 14°C on Thu afternoon, min 9°C on Mon night). Winds decreasing (fresh winds from the NNW on Tue night, light winds from the WNW by Thu afternoon). | ||||||||||||||||||
Mon 10 | Tuesday 11 | Wednesday 12 | ||||||||||||||||
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 17 | SW 16 | SW 16 | SW 16 | SW 15 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 16 | SW 16 | SW 16 | SW 16 | SW 16 | WSW 16 | WSW 17 | SW 17 |
Wave Graph  | ||||||||||||||||||
 kJ | 1904 | 1591 | 1420 | 1164 | 1062 | 1006 | 978 | 1139 | 957 | 736 | 1537 | 1728 | 1978 | 2414 | 2241 | 4543 | 5287 | 5516 |
Wind (km/h) | ||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | cross-on | cross-on | cross | cross | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross-on | cross-on | cross-on | cross-on |
High Tide | 7:35PM1.31m | 9:51AM1.29m | 8:53PM1.26m | 11:07AM1.32m | ||||||||||||||
Low Tide | 2:40AM0.25m | 3:23PM0.85m | 3:56AM0.26m | 4:55PM0.78m | ||||||||||||||
 | |  |  | |  | | | | | | | | |  |  | | | |
 | — | — | — | — | 7:11 | — | — | — | — | — | — | — | 7:11 | — | — | — | — | — |
 | — | — | — | — | — | — | — | 5:39 | — | — | — | — | — | — | — | 5:40 | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — |
Temp °C | 13 | 13 | 11 | 11 | 9 | 10 | 12 | 12 | 11 | 11 | 12 | 11 | 11 | 10 | 11 | 13 | 11 | 10 |
Feels °C | 6 | 8 | 5 | 5 | 3 | 3 | 5 | 6 | 3 | 3 | 4 | 3 | 3 | 3 | 4 | 8 | 5 | 5 |
Swell 1 Height (m) Direction Period (s) | SW 17 | SW 16 | SW 16 | SW 16 | SW 15 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 16 | SW 16 | SW 16 | SW 16 | SW 16 | SW 16 | SW 17 | SW 17 |
| kJ | 1904 | 1591 | 1420 | 1164 | 1062 | 1006 | 978 | 1139 | 957 | 736 | 1537 | 1728 | 1978 | 2414 | 2241 | 3458 | 3805 | 4335 |
Swell 2 Height (m) Direction Period (s) | SSW 17 | S 6 | S 7 | S 6 | S 6 | WSW 7 | SW 7 | SSW 18 | SW 18 | SW 18 | SSW 17 | SSW 16 | S 16 | NNE 4 | SW 20 | — | — | — |
| kJ | 99 | 75 | 69 | 48 | 26 | 120 | 82 | 61 | 215 | 379 | 57 | 87 | 135 | 3 | 459 | — | — | — |
Swell 3 Height (m) Direction Period (s) | ESE 10 | ESE 9 | — | SSW 16 | SSW 16 | S 6 | S 6 | — | SSW 18 | SE 10 | SE 10 | — | — | — | — | — | — | — |
| kJ | 18 | 9 | — | 48 | 95 | 18 | 15 | — | 33 | 4 | 4 | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SW 6 | WSW 6 | WSW 6 | SW 7 | WSW 7 | — | NW 4 | NW 4 | NNW 4 | NNW 4 | NNW 4 | NNW 4 | NNW 4 | W 4 | WSW 6 | WSW 16 | WSW 17 | WSW 17 |
| kJ | 154 | 96 | 181 | 226 | 142 | — | 12 | 11 | 18 | 28 | 32 | 40 | 37 | 48 | 115 | 4543 | 5287 | 5516 |
Nearest Offshore or Glassy | ||||||||||||||||||
Distance (km) | 35 | 170 | 45 | 31 | 27 | 27 | 25 | 25 | 17 | 17 | 34 | 17 | 68 | 34 | 100 | 294 | 100 | 27 |
Best forecast wave conditions in Mornington Peninsula | ||||||||||||||||||
Best forecast wave conditions in Australia | ||||||||||||||||||
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