Gunnamatta Beach Surf Break

Lat Long: 38.46° S 144.87° E

Gunnamatta Beach Surf Forecast and Surf Report

Issued: 9 pm 23 Aug 2026 (local time)

Forecast update in  hr  min

Today's Gunnamatta Beach sea temperature is
13.6°C
1.0° 

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 23 Aug 2026:

  • Best quality surf: Tuesday 25 Aug, 10AM (local time) - 5.5ft (1.7m), 13s period, SW swell with offshore winds.
  • Most powerful swell: Friday 28 Aug, 1PM (local time) - 6ft (1.9m), 17s period, SW swell with 2,238 kJ wave energy.
  • Next surfable swell (1★+): Monday 24 Aug, 10PM (local time) - 5ft (1.5m), 13s 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 Monday (Aug 24) at 10PM. The primary swell is predicted to be 1.5m and 13s period with a secondary swell of 0.2m and 19s. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Gunnamatta Beach in the next 16 days are 1.9m 17s and forecast to arrive on Friday (Aug 28) at 1PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Monday (Aug 24) at 10AM.

Wave TypeTime (AEST) & Date Wave Height & Period
Next good surf (1 star+)10PM (Mon 24th Aug)5ft (1.5m) 13s
Best Surf10AM (Tue 25th Aug)5.5ft (1.7m) 13s
Most Powerful 1PM (Fri 28th Aug)6ft (1.9m) 17s

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


The Lowdown

Alright, mate, Rusty here. Let's have a good look at the next couple of weeks for our stretch of coast. It's a mixed bag, but there are definitely a few windows where you'll want to be in the water.

The first couple of days are a bit of a write-off, to be honest. Monday the 24th has some swell, pushing 5ft, but it's messy with a fresh cross-offshore breeze and the tide looks iffy. Not worth getting excited about. Tuesday morning, the 25th, is where things start to turn. The wind swings around to a light offshore and the swell pushes up to around 6ft with a solid 13-second period. The energy is moderate, but the clean conditions will make it worth the paddle. This is the first real highlight for a more experienced surfer.

Wednesday the 26th is a write-off with onshore winds and poor conditions, so give it a miss. Thursday the 27th cleans right up again. The swell drops to 3-4ft, but it's glassy clean and the energy is low. It’ll be small and gutless, but perfect for a longboard or a foiler. Friday the 28th is the standout of the first week. The morning is okay, but the afternoon is where it's at. The swell is a solid 6ft from the SW with a very long 17-second period, and it's dead glassy with a strong amount of energy behind it. That’s a proper session.

The weekend is a bit of a mixed bag again. Saturday the 29th has clean waves in the morning, around 5ft, but the afternoon gets a bit wonky with a cross-onshore breeze. Sunday the 30th starts off glassy with a fun 3ft south swell, but it gets messy in the arvo when the wind swings onshore and bumps it up to 6ft.

The start of next week, Monday the 31st and Tuesday the 1st, looks mediocre. There's size – pushing 7ft – but the winds are cross-shore or onshore, making for lumpy, uninviting surf. Not great.

Now, for the second week, we need to watch the long-range stuff. Wednesday the 2nd of September looks promising. Mornings are clean with a cross-offshore, and the swell is 5-6ft. The afternoon has that "excellent conditions" tag. This is another good window. Thursday the 3rd and Friday the 4th are poor, with onshore winds and choppy, messy waves. A complete write-off.

The following weekend, the 5th and 6th of September, is interesting. The swell is pumping – 6ft to 8ft – but the winds are howling, either strong cross-shore or cross-off. It's not going to be pretty. For the 6th, with 8ft swell and a 45 km/h cross-offshore wind, this is more of a windsurfing or kitesurfing show than a paddle surf. It’s big and raw.

The stretch from the 7th to the 8th of September sees big, raw SW swell up to 10ft, but it’s all with strong onshore winds. That’s a full-blown "stay on the beach" situation. No good at all for surfing. It’s a blank run for the last few days, which is a bit of a bummer after that promising start.

So, to wrap it up: your best bets are Tuesday the 25th, and especially Friday afternoon the 28th of August. That Friday is the one. Then look to Wednesday the 2nd of September as the next promising window. Everything else is either too messy, too small, or way too blown out.

Stay stoked.

Rusty.

Short Range Forecast

Moderate rain (total 12mm), heaviest on Tue morning. Very mild (max 16°C on Mon afternoon, min 11°C on Sun night). Winds decreasing (fresh winds from the N on Sun night, light winds from the ENE by Mon night).

Days 5-7 Weather Summary

Mostly dry. Very mild (max 16°C on Fri afternoon, min 8°C on Thu morning). Wind will be generally light.

Monday
24
Tuesday
25
Wednesday
26
Thursday
27
Friday
28
Saturday
29
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
3
1
2
3
4
1
0
0
0
1
3
3
4
3
4
4
3
1
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2
SW
15
1.6
SW
14
1.4
SW
13
1.6
SW
13
1.7
SW
13
1.7
SW
13
1.7
SW
14
2.1
SW
14
1.7
SW
13
1.6
SW
13
1.2
SW
12
1
SW
14
0.9
SW
20
1.5
SW
18
1.9
SW
17
1.6
SW
16
1.4
SW
14
1.2
SW
14
1.1
SW
13
Wave Graph
Metric surfscale
Energy kJ
1832
957
704
777
969
925
1163
1688
984
790
389
361
560
1367
2136
1239
763
606
394
Wind (km/h)
20
NNW
30
N
25
N
15
NE
15
ENE
20
WSW
30
WSW
25
SW
25
SW
15
W
15
NNW
10
NNE
15
NNW
15
N
5
NE
10
NNW
5
NNW
10
S
10
SE
Wind State
cross-off
cross-off
cross-off
off
off
on
on
on
on
cross-on
cross-off
off
cross-off
cross-off
glassy
cross-off
cross-off
cross-on
cross
High Tide
7:47AM1.31m
6:44PM1.29m
8:59AM1.27m
7:41PM1.21m
10:20AM1.29m
9:06PM1.17m
11:26AM1.34m
10:40PM1.18m
12:14PM1.41m
11:52PM1.26m
12:51PM1.48m
00:48AM1.36m
Low Tide
00:53AM0.40m
1:16PM0.89m
1:46AM0.46m
2:29PM0.95m
2:53AM0.50m
4:09PM0.95m
4:09AM0.51m
5:29PM0.87m
5:17AM0.49m
6:22PM0.75m
6:13AM0.45m
7:01PM0.62m
part cloud
part cloud
cloud
light rain
mod rain
rain showers
clear
part cloud
clear
clear
clear
clear
clear
part cloud
part cloud
part cloud
part cloud
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:54
6:54
6:52
6:50
6:50
6:48
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:51
5:52
5:52
5:52
5:53
5:54
 mm
3
7
2
Temp °C
13
14
16
16
12
13
12
12
12
11
11
14
14
13
16
15
14
14
14
Feels °C
9
9
11
12
10
9
7
6
6
7
8
11
11
10
13
12
12
11
12
  • Map Icons:
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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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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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