Gunnamatta Beach surf break

Gunnamatta Beach surfForecast / VIC – Mornington Peninsula / Australia

information circle12 Day Weather and Surf, issued 9 am Friday 19 Sep 2025 AEST
Forecast update in hr  min  s Forecast update imminent
Gunnamatta Beach surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Gunnamatta Beach sea temperature is
13.6° C
(Which is slightly warmer than usual)


Best Forecast Surf Conditions for Gunnamatta Beach this week:

The surf forecast for Gunnamatta Beach over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Sep 25) at 10PM. The primary swell is predicted to be 3.0m and 16s period with a secondary swell of 0.6m and 15s. The wind is predicted to be cross-onshore as the swell arrives.

The most powerful waves expected at Gunnamatta Beach in the next 12 days are 4.5m 14s and forecast to arrive on Saturday (Sep 20) at 7AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 4s period and expected on Friday (Sep 19) at 4PM.

Wave TypeTime (AEST) & Date Wave Height & Period
Next good surf (1 star+)10PM (Thu 25th Sep)10ft (3.0m) 16s
Best Surf10PM (Thu 25th Sep)10ft (3.0m) 16s
Most Powerful 7AM (Sat 20th Sep)15ft (4.5m) 14s

Table - best surf conditions forecast for Gunnamatta Beach over the next 12 days.

Updates in  hr  min  s Forecast update imminent

Short Range Forecast Moderate rain (total 12mm), heaviest on Fri night. Very mild (max 18°C on Fri morning, min 9°C on Fri night). Mainly strong winds.

Days 3-6 Weather Summary Light rain (total 8mm), mostly falling on Mon morning. Very mild (max 13°C on Wed afternoon, min 10°C on Mon morning). Winds decreasing (strong winds from the SSW on Mon afternoon, moderate winds from the SW by Tue morning).

Friday
19
Saturday
20
Sunday
21
Monday
22
Tuesday
23
Wednesday
24
Thursday
25
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
2
0
0
1
0
0
!
Swell
Height Map
Wave Height (m) & direction (?)
1.3
WSW
1.2
SW
3
WSW
4
SW
4
WSW
2.5
SW
2.5
SW
3
WSW
3
WSW
3
SW
3.5
SW
3.5
SW
2.5
SW
2.3
SW
1.9
SW
1.6
SW
2.4
SW
2.3
SW
2.5
SW
3
SW
3
SW
Period(s) (?)121211141313121212131414141313171516151616
Wave
Graph
(?)Metric surfscale
Energy kJ (?)4564421967683454782326186026642571282441854011252819331247139927252567306248193678
Wind
(km/h)
50
N
30
WNW
35
WNW
40
W
35
W
40
WNW
40
WNW
35
WNW
30
WNW
35
WSW
45
SSW
40
S
25
SSW
25
SW
20
WNW
25
SW
25
SW
30
WNW
40
WNW
30
WSW
15
WSW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off
cross-
on
crosscross-
on
cross-
on
crosscrosscross-
on
cross-
on
ononcross-
on
ononcrossononcrosscrosscross-
on
cross-
on
High Tide
/ height (m)
8:29PM
1.27
10:10AM
1.34
10:06PM
1.27
11:14AM
1.37
11:26PM
1.34
12:04PM
1.42
12:26AM
1.44
12:44PM
1.46
1:13AM
1.53
1:19PM
1.50
1:53AM
1.61
1:52PM
1.53
2:29AM
1.66
Low Tide
/ height (m)
2:48PM
0.81
3:16AM
0.50
4:17PM
0.76
4:37AM
0.53
5:26PM
0.66
5:43AM
0.52
6:16PM
0.53
6:36AM
0.49
6:56PM
0.41
7:20AM
0.47
7:32PM
0.31
7:58AM
0.46
8:05PM
0.24
Friday
19
Saturday
20
Sunday
21
Monday
22
Tuesday
23
Wednesday
24
Thursday
25
Sunrise6:16--6:13--6:13--6:11--6:09--6:07--6:05--
Sunset-6:13--6:14--6:15--6:15--6:16--6:16--6:17-
clear
clear
rain showers
light rain
part cloud
cloud
cloud
light rain
light rain
rain showers
rain showers
rain showers
part cloud
clear
cloud
cloud
part cloud
part cloud
rain showers
light rain
rain showers
Rain (mm)
--61---23521------223
Temp. °C18189111212141312111111111112121312131312
Feels °C (?)10110343666210556787779
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder

Eyeball surf reportRecent Eyeball Surf Reports for VIC - Mornington Peninsula

  1. weather stationWind Update Continuing clean conditions at Gunnamatta Beach (light winds from the N at Cerberus Automatic Weather Station 28 km from Gunnamatta Beach). 1.0m 11s groundswell from the WSW with a 0.2m 9s swell from the S. 2 swells combining to make bigger set waves.

    Gunnamatta Beach
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28 km away, 1 h 16 min ago

9 km/h
N
0.0
13.6
Air / Water (°C)
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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Gunnamatta Beach surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.


Information about the Gunnamatta Beach Surf forecast

The above surf forecast table for Gunnamatta Beach provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Gunnamatta Beach can be found by selecting the local surf guide option on the grey menu. Our Gunnamatta Beach 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 (Gunnamatta Beach) 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 Gunnamatta Beach 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.

Gunnamatta Beach is 31 km (19 miles) from Mornington. If you plan a holiday in Mornington Peninsula, look for hotels and other accommodation in Mornington. Mornington has rooms for a wide range of budgets as well as car hire and transport links.

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