Secret Harbour Surf Break

Lat Long: 32.40° S 115.74° E

Secret Harbour Surf Forecast and Surf Report

Issued: 7 am 15 Jul 2026 (local time)

Forecast update in  hr  min

Today's Secret Harbour sea temperature is
18.3° C
1.0° 

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


Secret Harbour surf forecast from 15 Jul 2026:

  • Best quality surf: Friday 17 Jul, 2AM (local time) - 6ft (1.8m), 13s period, WSW swell with glassy winds.
  • Most powerful swell: Saturday 18 Jul, 2PM (local time) - 13ft (4.0m), 16s period, W swell with 7,100 kJ wave energy.
  • Next surfable swell (1★+): Friday 17 Jul, 2AM (local time) - 6ft (1.8m), 13s period with WSW swell.

Best Forecast Surf Conditions for Secret Harbour this week:

The surf forecast for Secret Harbour over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Jul 17) at 2AM. The primary swell is predicted to be 1.8m and 13s period with a secondary swell of 1.1m and 7s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Secret Harbour in the next 16 days are 4.0m 16s and forecast to arrive on Saturday (Jul 18) at 2PM. Winds are predicted to be cross-onshore at the time the swell arrives.

Wave TypeTime (AWST) & Date Wave Height & Period
Next good surf (1 star+) 2AM (Fri 17th Jul)6ft (1.8m) 13s
Best Surf 2AM (Fri 17th Jul)6ft (1.8m) 13s
Most Powerful 2PM (Sat 18th Jul)13ft (4.0m) 16s

Table - best surf conditions forecast for Secret Harbour over the next 16 days.


The Lowdown

G’day, Rusty here. Let’s have a look at what’s cookin’ for Secret Harbour over the next couple of weeks.

Alright, straight off the bat, we’ve got a bit of a mixed bag. The first few days are nothin’ to write home about, with wind making things a bit tricky and the surf quality flagged as marginal. The real standout, the one you’d wanna circle on the calendar, looks like Thursday, July 23rd. We’ve got offshore winds from the ENE, clean lines, and a solid 6 ft of swell from the WSW with a 14-second period. That’s proper groundswell energy, and the water’s sitting at 65°, which is a bit colder than normal for this time of year. The energy levels are healthy, with combined swell energy readings around 1374. That’s the one.

Now, let’s walk through it. Wednesday, July 15th, starts off with 5 ft swell from the WSW, but that cross-off wind from the NNE at 25 km/h keeps things from being perfect. The energy is high (1241), but it’s a marginal call. The afternoon sees a cleaner look with a 16-second period swell, but still not a standout.

Thursday, July 16th, is a bit of a write-off. The morning has moderate rain and onshore wind, with 5 ft swell. The afternoon jumps to 7 ft from the W, but the wind is cross-shore and lumpy. Energy is huge (1968), but the quality is poor.

Friday, July 17th, starts with a cleaner 6 ft from the WSW, but the wind is still cross-off. The afternoon gets messy with fresh cross-shore wind and lumpy conditions. Energy is there but not the ride.

Saturday, July 18th, is a no-go. 12 ft of swell from the W, but it’s onshore and lumpy. Energy is massive (4619 and 6303). That’s more of a beast than a wave. Not for the faint-hearted, and definitely not for beginners.

Sunday, July 19th, and Monday, July 20th, are all onshore and choppy, with swell coming down but quality still poor. The energy drops off, and it’s just not worth paddling out.

Tuesday, July 21st, is another onshore day with 7 ft of swell, but the wind is on it. Not good.

Then we hit Wednesday, July 22nd. The wind shifts to a cross-off from the SE, and the swell is 6 ft from the WSW. It’s still marginal, but cleaner. The morning wind is fresh at 30 km/h, but the afternoon settles down with a moderate breeze, giving a cleaner look.

Now, Thursday, July 23rd – this is the day. Morning offshore winds from the ENE at 25 km/h, 6 ft of WSW swell with a 14-second period, and the energy is solid (1374). The afternoon is even better with a gentle offshore breeze. The surf is described as “excellent for experienced surfers”. That’s the session. Crowds can be expected sometimes, so get in early.

Friday, July 24th, the swell drops to 4 ft and the wind is cross-off. It’s clean but small. The afternoon has a 4 ft swell with a gentle breeze – okay for a longboard, but nothing special. Energy is low (499 and 396).

Saturday, July 25th, and Sunday, July 26th, are small and weak. Swell under 3 ft, with energy in the 200-300 range. Not worth a paddle.

Monday, July 27th, has a surprise in the morning – a 4 ft swell from the WSW with a 14-second period, and the wind is almost nothing at 5 km/h from the NNE. The energy is 637, and it’s described as “very good”. The afternoon gets cross-on and choppy, so the morning is the window.

Tuesday, July 28th, is small again, with 3 ft swell and light wind, but the afternoon gets onshore. Not worth it.

Wednesday, July 29th, has a very long period 19-second swell from the WSW, but it’s only 3 ft. The energy is moderate (1018), but the period is so long it’ll be a bit straight at the beach break. The wind is light and cross-shore. This one’s a maybe for the patient.

Thursday, July 30th, finishes the forecast with a clean 4 ft from the WSW in the morning, and a solid 5 ft in the afternoon with a 18-second period. The ESE wind is cross-off, and the energy is high (1823 and 3022). A solid late call.

So, to sum it up, the best bets are Thursday, July 23rd, for the best quality, and Monday, July 27th, for a sneaky clean morning session. The rest of the window is small, windy, or too big. If you’re a beginner, stay away from the 8 ft+ days. The long period swells later in the window will be better on a reef or point break, but Secret Harbour is a sandbar, so be aware it might break a bit straight.

Rusty.

Short Range Forecast

Heavy rain (total 44mm), heaviest during Thu afternoon. Warm (max 23°C on Wed afternoon, min 15°C on Wed morning). Winds increasing (calm on Thu night, strong winds from the WNW by Fri night).

Days 4-6 Weather Summary

Moderate rain (total 10mm), heaviest on Sun morning. Very mild (max 17°C on Mon night, min 15°C on Sat morning). Winds decreasing (strong winds from the W on Sat morning, calm by Sun night).

Wednesday
15
Thursday
16
Friday
17
Saturday
18
Sunday
19
Monday
20
Tuesday
21
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
2
3
2
2
2
4
3
1
0
0
0
2
0
1
4
0
0
0
0
0
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.4
WSW
14
1.3
WSW
16
1.6
WSW
16
1.6
WSW
15
2
W
14
1.8
WSW
13
1.7
WSW
13
1.8
W
12
2.5
W
14
3.5
W
13
3.5
W
16
3
W
15
2.4
WSW
14
2.1
WSW
13
1.9
WSW
13
1.7
WSW
12
1.5
WSW
11
1.2
WSW
10
1.3
WSW
16
2.2
WSW
14
1.9
WSW
14
Wave Graph
Metric surfscale
Energy kJ
701
939
1150
1092
1691
1179
980
973
2805
4619
6303
3617
2202
1535
1236
833
550
286
793
2082
1286
Wind (km/h)
25
NNE
20
N
25
NNE
25
N
25
NNW
5
ENE
15
N
30
NNW
40
WNW
30
W
25
W
15
W
20
SW
20
SSW
5
W
20
WNW
25
WNW
25
WNW
25
WSW
25
WSW
15
WNW
Wind State
cross-off
cross-off
cross-off
cross-off
cross
glassy
cross-off
cross
cross-on
cross-on
on
cross-on
cross-on
cross-on
glassy
cross-on
cross-on
cross-on
on
on
cross-on
High Tide
9:58AM1.09m
10:38AM1.05m
11:10AM0.98m
11:28AM0.90m
2:25AM0.72m
11:11AM0.81m
2:16AM0.77m
9:00AM0.75m
2:35AM0.81m
3:13AM0.84m
Low Tide
7:04PM0.37m
7:32PM0.45m
7:46PM0.53m
7:27PM0.59m
4:17AM0.72m
6:34PM0.61m
6:00AM0.74m
5:51PM0.57m
5:32PM0.51m
clear
clear
part cloud
mod rain
heavy rain
rain showers
rain showers
mod rain
rain showers
rain showers
rain showers
part cloud
rain showers
rain showers
part cloud
part cloud
cloud
rain showers
rain showers
rain showers
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:16
7:16
7:16
7:15
7:15
7:13
7:13
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:29
5:29
5:30
5:30
5:30
5:31
5:31
 mm
6
21
5
1
6
5
1
1
5
2
1
4
1
2
Temp °C
18
23
21
17
18
19
18
18
18
16
16
16
15
16
16
16
16
17
17
17
17
Feels °C
12
19
18
12
16
17
16
14
15
9
10
11
11
12
13
12
11
12
13
11
13
  • 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 Secret Harbour Surf forecast

The above surf forecast table for Secret Harbour provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Secret Harbour can be found by selecting the local surf guide option on the grey menu. Our Secret Harbour 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 (Secret Harbour) 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 Secret Harbour 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.

Secret Harbour is 13 km (8 miles) from Mandurah. If you plan a holiday in Perth City Coast, look for hotels and other accommodation in Mandurah. Mandurah has rooms for a wide range of budgets as well as car hire and transport links.

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