Gunnamatta Beach Surf Break

Lat Long: 38.46° S 144.87° E

Gunnamatta Beach Surf Forecast and Surf Report

Issued: 3 am 03 Aug 2026 (local time)

Forecast update in  hr  min

Today's Gunnamatta Beach sea temperature is
13.7° C
0.7° 

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 2 Aug 2026:

  • Best quality surf: Monday 10 Aug, 7AM (local time) - 15ft (4.5m), 13s period, WSW swell with cross-shore winds.
  • Most powerful swell: Monday 10 Aug, 10AM (local time) - 16ft (5.0m), 15s period, WSW swell with 10,260 kJ wave energy.
  • Next surfable swell (1★+): Friday 7 Aug, 1PM (local time) - 6ft (1.8m), 16s 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 Friday (Aug 07) at 1PM. The primary swell is predicted to be 1.8m and 16s period with a secondary swell of 0.4m and 19s. 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 5.0m 15s and forecast to arrive on Monday (Aug 10) at 10AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.8m 6s period and expected on Sunday (Aug 09) at 7AM.

Wave TypeTime (AEST) & Date Wave Height & Period
Next good surf (1 star+) 1PM (Fri 7th Aug)6ft (1.8m) 16s
Best Surf 7AM (Mon 10th Aug)15ft (4.5m) 13s
Most Powerful10AM (Mon 10th Aug)16ft (5.0m) 15s

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


The Lowdown

Righto, let’s have a look at what’s on the cards for the coming weeks. We’re talking about Gunnamatta Beach, and it’s a bit of a mixed bag. The water temperature is sitting at 57°, which is pretty much average for the time of year, nothing wild there.

The first few days are a write-off, if I’m being honest. Monday and Tuesday are a mess with strong cross and onshore winds, lumpy seas, and the swell is just a confused, choppy affair. The combined energy is high, but it’s all for nothing with the wind. You’d be mad to paddle out Monday arvo – 7ft of lumpy WSW swell with fresh cross-onshore wind, just ugly. Tuesday arvo even sees a 10ft SW swell but with strong onshore winds that make it a total no-go. Wednesday and Thursday are similar – poor conditions with rain and onshore winds. There’s a solid 5ft SW groundswell on Friday morning, but it’s cross-on and marginal. Honestly, the first week is a brutal slog.

Then, out of nowhere, Friday afternoon on the 7th of August looks like a little gem. The wind swings to a light offshore from the NE, and you’ve got a clean 5ft SW swell with a long 15-second period. The combined energy is solid (1627), and the description says “excellent surf conditions for experienced surfers.” That’s your window. It’s a bit of a standout, but it’s a short-lived one.

Saturday the 8th stays clean with offshore cross-off winds, but the swell is the same 5ft, and the wind is a fresh 30 km/h from the north, which is a bit of a howler. It’s surfable, but not the same quality as Friday arvo. Sunday the 9th is a no-go with near-gale winds, despite the swell being around.

Now, the second week gets a bit wild. Monday the 10th and Tuesday the 11th see a massive jump in size – we’re talking 16ft of SW swell with combined energy hitting 12,000+. That’s way too big for Gunnamatta, even for experts. The wind is cross or cross-on, but the swell is just too much. It’s a “too big” warning. This continues into the middle of the week with 12ft to 13ft swells. It’s a real beast, but not for surfing.

The real standout for the second week is Saturday the 15th of August. The morning has a clean 7ft SW swell with a 16-second period, and a light offshore breeze from the NNW. The combined energy is 2587, and it’s marked as “excellent surf conditions for experienced surfers.” That’s your best bet for a proper session. The afternoon is still okay, but the wind goes light cross-on, so it’s a bit less clean.

So, to sum it up: the first week is mostly a dud, with a brief window Friday afternoon the 7th. The second week is dominated by a massive, dangerous swell, but the real prize is the morning of Saturday the 15th. Keep an eye on that one.

Rusty.

Short Range Forecast

Heavy rain (total 28mm), heaviest during Tue morning. Very mild (max 12°C on Mon afternoon, min 8°C on Mon night). Winds decreasing (strong winds from the WSW on Tue morning, moderate winds from the W by Wed night).

Days 4-6 Weather Summary

Light rain (total 5mm), mostly falling on Sat night. Very mild (max 14°C on Fri afternoon, min 9°C on Thu morning). Winds increasing (light winds from the NE on Fri afternoon, near gales from the N by Sat night).

Monday
3
Tuesday
4
Wednesday
5
Thursday
6
Friday
7
Saturday
8
Sunday
9
AM
PM
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
1
0
0
0
0
0
0
0
0
1
4
3
2
2
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.6
SW
15
2
WSW
14
2.1
WSW
13
1.5
SW
11
3
SW
11
2
SW
10
1.4
SW
9
1.7
SW
14
1.1
SW
13
0.8
SW
12
0.9
SW
16
0.9
SW
18
1.6
SW
16
1.6
SW
15
1.4
SW
14
1.6
SW
16
1.6
SW
16
1.3
SW
14
1.1
SW
14
0.9
SW
16
1.7
SW
15
Wave Graph
Metric surfscale
Energy kJ
1020
1582
1449
515
1970
753
297
1139
374
206
406
528
1333
1171
821
1240
1179
676
456
381
1271
Wind (km/h)
35
NW
30
W
35
WNW
30
WNW
40
WSW
30
WSW
25
SW
30
WSW
20
W
20
NW
30
NW
25
WNW
15
WNW
10
NE
15
N
30
N
30
N
40
N
60
N
50
N
45
WSW
Wind State
cross
cross-on
cross-on
cross
on
on
on
on
cross-on
cross
cross
cross-on
cross-on
off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
on
High Tide
2:59PM1.65m
3:14AM1.49m
3:27PM1.65m
3:54AM1.54m
3:55PM1.64m
4:35AM1.58m
4:25PM1.62m
5:20AM1.59m
4:58PM1.60m
6:09AM1.58m
5:36PM1.57m
7:06AM1.54m
6:22PM1.52m
Low Tide
9:15PM0.40m
9:14AM0.38m
9:45PM0.30m
9:50AM0.43m
10:17PM0.22m
10:28AM0.49m
10:52PM0.16m
11:08AM0.57m
11:33PM0.11m
11:53AM0.66m
00:20AM0.10m
12:45PM0.76m
1:16AM0.12m
rain showers
part cloud
rain showers
rain showers
thunderstorm
rain showers
rain showers
rain showers
part cloud
cloud
cloud
part cloud
cloud
cloud
part cloud
cloud
cloud
light rain
light rain
light rain
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:20
7:18
7:18
7:16
7:16
7:15
7:13
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:31
5:32
5:34
5:35
5:36
5:37
5:37
 mm
1
3
9
4
8
2
1
5
2
4
10
Temp °C
11
12
10
12
12
12
12
12
12
9
12
12
12
14
13
13
14
13
11
10
12
Feels °C
3
4
2
3
4
6
7
5
6
4
6
8
7
10
9
6
7
5
-1
-1
2
  • 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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