Gunnamatta Beach Surf Break

Lat Long: 38.46° S 144.87° E

Gunnamatta Beach Surf Forecast and Surf Report

Issued: 9 pm 21 Jul 2026 (local time)

Forecast update in  hr  min

Today's Gunnamatta Beach sea temperature is
14.3° C
1.1° 

Gunnamatta Beach surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Gunnamatta Beach surf forecast from 21 Jul 2026:

  • Best quality surf: Tuesday 28 Jul, 1AM (local time) - 11ft (3.5m), 13s period, SW swell with cross-shore winds.
  • Most powerful swell: Friday 24 Jul, 4AM (local time) - 13ft (4.0m), 16s period, SW swell with 7,773 kJ wave energy.
  • Next surfable swell (1★+): Sunday 26 Jul, 7PM (local time) - 4.5ft (1.4m), 11s period with SW swell.

Best Forecast Surf Conditions for Gunnamatta Beach this week:

The surf forecast for Gunnamatta Beach over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Jul 26) at 7PM. The primary swell is predicted to be 1.4m and 11s period with a secondary swell of 0.2m and 16s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Gunnamatta Beach in the next 16 days are 4.0m 16s and forecast to arrive on Friday (Jul 24) at 4AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 4s period and expected on Monday (Jul 27) at 1PM.

Wave TypeTime (AEST) & Date Wave Height & Period
Next good surf (1 star+) 7PM (Sun 26th Jul)4.5ft (1.4m) 11s
Best Surf 1AM (Tue 28th Jul)11ft (3.5m) 13s
Most Powerful 4AM (Fri 24th Jul)13ft (4.0m) 16s

Table - best surf conditions forecast for Gunnamatta Beach over the next 16 days.


The Lowdown

Alright folks, Rusty here. We've got a mixed bag ahead for the region, with a wild start and a sweet, quiet finish for those who can wait.

The outlook kicks off with a lumpy, wind-blown mess. From Wednesday the 22nd through the rest of the week, we’re looking at a solid pulse of SW groundswell, but the wind is absolutely howling from the west and southwest. It’s cross-on, strong, and messy. The wave energy is massive (over 12,000 in the combined energy reading on Friday morning), but don’t get excited. The surf quality is poor, and the swell is too big and blown out for any kind of fun paddle surfing. The setup at Gunnamatta Beach looks way more interesting for kite surfing than paddle surfing during this period.

We’ll finally see a change on Sunday the 26th. The wind drops, and the swell starts to ease. It’s still marginal, but by Monday afternoon the 27th, we get a clean window. Light NNW winds, a clean cross-off, and clean 5ft of SW swell. The energy is moderate (513), but it’s a nice little pick-up session.

Now, here’s where it gets interesting. Tuesday morning the 28th has a massive 12ft SW groundswell with light, clean cross-off winds. The catch is, the swell is simply too big for this break. The wave energy is over 3,400, and this is a spot for experienced surfers only. The same goes for Wednesday morning the 29th—7ft of long-period SW swell (14 seconds) and clean conditions. The combined energy is 2,428, and it’s labeled as excellent for experienced surfers, but that is a fair call. The long period will make it a bit walled-up at the beach, so it’s more of a reef or point break kind of wave.

The standout for the entire forecast, without a doubt, is Thursday the 30th. The morning is glassy with an ENE breeze, 5ft of SW swell, and very good surf conditions. The energy is moderate (933). It’s clean, it’s manageable, and it’s going to be a beautiful day in the water. The following Friday the 31st brings another solid option with 7ft of very long-period SW swell (18 seconds) and clean cross-off winds. The wave energy is strong (2,885), but again, the long period demands a bit of respect and a good spot to break properly.

After that, the first weekend of August (the 1st and 2nd) looks playful with clean, smaller 4ft to 5ft SW swell. The winds are light and offshore. The water temperature is sitting about average for the time of year, around 59° to 59°F, so a good 4/3 will do.

The second week gets quiet. From Monday the 3rd onwards, the swell drops off, and the wind, while cross-off, is getting strong again. The energy is weak, and the surf is poor. It’s a long gap of several days with no real recommendations. The run ends on Wednesday the 6th with almost no swell.

Stay safe out there, and score that glassy Thursday morning.

Rusty.

Short Range Forecast

Moderate rain (total 13mm), heaviest on Wed afternoon. Very mild (max 13°C on Wed morning, min 9°C on Wed night). Winds increasing (moderate winds from the NW on Tue night, strong winds from the WSW by Thu night).

Days 5-7 Weather Summary

Light rain (total 4mm), mostly falling on Fri night. Very mild (max 15°C on Mon afternoon, min 11°C on Fri night). Winds decreasing (strong winds from the WNW on Fri night, light winds from the NNW by Sun afternoon).

Wednesday
22
Thursday
23
Friday
24
Saturday
25
Sunday
26
Monday
27
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
1
0
1
0
1
3
!
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.2
SW
12
1.3
SW
12
1.1
SW
13
2.1
SW
11
3
SW
14
3
SW
14
4
SW
16
4
SW
15
3.5
SW
14
3.5
WSW
13
3
SW
12
3
SW
12
2.3
SW
11
1.6
SW
11
1.5
SW
11
1.3
SW
11
1.2
SW
11
1.4
SW
11
3.5
SW
13
Wave Graph
Metric surfscale
Energy kJ
449
463
411
1053
4222
4021
7655
6304
5046
3861
2831
2408
1310
629
515
357
344
506
3668
Wind (km/h)
30
NNW
30
WNW
35
WSW
35
WSW
35
W
45
WSW
45
WSW
35
W
40
WNW
35
WNW
35
WSW
30
WSW
25
WNW
20
W
10
WSW
15
NW
20
NNW
10
NNW
15
NW
Wind State
cross-off
cross
cross-on
cross-on
cross-on
cross-on
on
cross-on
cross-on
cross-on
cross-on
on
cross
cross-on
cross-on
cross
cross-off
cross-off
cross
High Tide
5:18AM1.54m
5:07PM1.62m
6:04AM1.48m
5:40PM1.53m
6:52AM1.43m
6:13PM1.44m
7:43AM1.37m
6:49PM1.36m
8:42AM1.33m
7:32PM1.29m
9:50AM1.32m
8:29PM1.23m
Low Tide
10:59PM0.19m
11:07AM0.52m
11:39PM0.22m
11:47AM0.64m
00:17AM0.26m
12:29PM0.74m
00:58AM0.32m
1:15PM0.83m
1:43AM0.37m
2:12PM0.91m
2:35AM0.41m
3:25PM0.95m
3:37AM0.43m
part cloud
clear
rain showers
rain showers
rain showers
rain showers
light rain
cloud
cloud
rain showers
rain showers
part cloud
clear
clear
clear
clear
cloud
cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:31
7:30
7:28
7:28
7:28
7:26
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:22
5:22
5:23
5:24
5:25
5:27
 mm
3
4
3
1
2
3
1
Temp °C
12
13
12
11
10
11
11
11
12
13
13
13
12
13
13
13
12
15
14
Feels °C
6
8
6
4
1
1
1
3
3
6
6
6
8
9
11
10
8
12
11
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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 16 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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