Manly-South Steyne Surf Break

Lat Long: 33.80° S 151.30° E

Manly-South Steyne Surf Forecast and Surf Report

Issued: 9 pm 11 Aug 2026 (local time)

Forecast update in  hr  min

Today's Manly-South Steyne sea temperature is
16.8° C
1.2° 

Manly-South Steyne surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Manly-South Steyne surf forecast from 11 Aug 2026:

  • Best quality surf: Wednesday 12 Aug, 7AM (local time) - 4ft (1.2m), 10s period, S swell with cross-offshore winds.
  • Most powerful swell: Thursday 13 Aug, 4PM (local time) - 6ft (1.8m), 9s period, S swell with 470 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 12 Aug, 7AM (local time) - 4ft (1.2m), 10s period with S swell.

Best Forecast Surf Conditions for Manly-South Steyne this week:

The surf forecast for Manly-South Steyne over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Aug 12) at 7AM. The primary swell is predicted to be 1.2m and 10s period. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Manly-South Steyne in the next 16 days are 1.8m 9s and forecast to arrive on Thursday (Aug 13) at 4PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 7s period and expected on Tuesday (Aug 18) at 10PM.

Wave TypeTime (AEST) & Date Wave Height & Period
Next good surf (1 star+) 7AM (Wed 12th Aug)4ft (1.2m) 10s
Best Surf 7AM (Wed 12th Aug)4ft (1.2m) 10s
Most Powerful 4PM (Thu 13th Aug)6ft (1.8m) 9s

Table - best surf conditions forecast for Manly-South Steyne over the next 16 days.


The Lowdown

G'day, Rusty here. Well, I gotta be straight with you – this 16-day window for Manly-South Steyne starts off with a whole lot of nothin' really. We've got a stretch of ordinary conditions that just won't quit.

The first sign of anything surfable is Wednesday morning, 12 August. Manly-South Steyne (reef) is pulling in some 4ft S swell, period around 10 seconds. The energy is moderate (219). The wind is a gentle offshore from the W at 9 mph, which is keeping things clean. It's surfable, but it's just not exciting. The water temp is about average for this time of year, so nothin' special there.

We roll into Thursday 13 August, and the morning is still clean with a light WSW offshore, but the swell drops to 3ft and the period shortens to 8 seconds, making it weak. The afternoon sees a jump to 6ft S swell, but the wind swings SE at 9 mph, puttin' it cross-onshore and choppy. The energy jumps up (753), but it's messy.

Friday 14 August morning is clean again with a 4ft S swell, moderate energy (217), and a light WSW offshore at 6 mph. It's a gentle, clean option, but the afternoon gets ruined by an ESE cross-onshore. Saturday and Sunday, 15 and 16 August, are just a write-off with strong SSE winds and choppy, poor conditions. The swell sticks around in the 4ft to 6ft range, but the quality is just not there.

The whole week from 17 August through to 25 August is a long, sad stretch of poor surf. The swell is small, directions are all over the place, and the winds are mostly onshore or cross-shore. There's a morning on Thursday 20 August that's glassy with a 5ft E swell (354 energy), but it's still rated as ordinary. Then from 21 August, the swell just completely dies, dropping to 0.7ft or 0.3ft. It's a heartbreaking run of flat days.

Now, hold on to your board. The one true standout, the only one that gets my blood pumpin', is Wednesday morning, 26 August. Manly-South Steyne is gonna get hammered by a 13ft S swell. The energy is massive (2530). The wind is a light offshore from the WSW at 6 mph, making for clean conditions. This is expert territory, no doubt about it – way too big for beginners. The period is only 9 seconds, so it's a bit of a wind swell, but with that size and clean offshore wind, it's going to be a heavy, powerful day. The afternoon gets messy with a 12ft swell and onshore E wind, so get in early.

Thursday 27 August is still big at 8ft, but the wind is cross-on from the NNE, making it choppy and poor. So, the one window of greatness is that Wednesday morning. Don't sleep on it.

So, to sum it up: a long, flat, or poor run for most of the outlook, with a single, heavy, expert-only day on the 26th. That's the one to circle on the calendar.

Signing off, Rusty.

Short Range Forecast

Mostly dry. Very mild (max 19°C on Wed afternoon, min 10°C on Thu night). Wind will be generally light.

Days 5-7 Weather Summary

Heavy rain (total 22mm), heaviest during Fri night. Very mild (max 16°C on Sun night, min 14°C on Fri night). Winds increasing (light winds from the S on Fri night, fresh winds from the SSE by Sat night).

Wednesday
12
Thursday
13
Friday
14
Saturday
15
Sunday
16
Monday
17
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
2
1
1
0
0
0
1
1
0
1
0
0
1
0
0
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)
1.4
S
11
1.1
S
10
0.9
S
9
0.8
S
8
0.9
S
8
1.8
S
9
1.1
S
8
1.1
S
9
1.1
S
8
1.2
S
7
1.8
S
8
1.7
S
7
1.4
SSE
7
1.3
SSE
6
1.6
SSE
6
1.8
SE
7
1.6
ESE
7
1.6
ESE
7
1.5
E
7
Wave Graph
Metric surfscale
Energy kJ
432
219
126
86
99
470
142
189
165
155
397
320
168
140
215
317
258
244
230
Wind (km/h)
15
W
15
W
15
W
15
W
15
WSW
15
SE
15
W
10
WSW
15
ESE
10
S
20
SSE
25
S
10
SSW
25
SSE
15
SSE
20
ESE
15
ESE
25
ESE
15
ESE
Wind State
cross-off
off
off
off
off
cross-on
off
off
cross-on
cross-off
cross
cross-off
cross-off
cross
cross
cross-on
cross-on
cross-on
cross-on
High Tide
7:50AM1.17m
7:51PM1.76m
8:35AM1.24m
8:37PM1.72m
9:18AM1.29m
9:21PM1.64m
10:00AM1.32m
10:04PM1.51m
10:41AM1.34m
10:46PM1.36m
11:23AM1.34m
11:30PM1.20m
Low Tide
1:50AM-0.01m
1:23PM0.22m
2:34AM-0.04m
2:14PM0.19m
3:14AM-0.02m
3:03PM0.19m
3:52AM0.02m
3:52PM0.22m
4:28AM0.10m
4:41PM0.28m
5:03AM0.19m
5:33PM0.35m
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
rain showers
rain showers
clear
rain showers
part cloud
rain showers
rain showers
rain showers
rain showers
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:37
6:35
6:35
6:33
6:33
6:31
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:22
5:22
5:22
5:23
5:24
5:25
 mm
5
3
6
3
2
1
2
4
Temp °C
14
17
19
13
16
15
14
16
15
15
15
15
15
15
15
16
16
15
16
Feels °C
8
14
14
8
13
11
10
13
12
13
9
10
12
9
9
12
12
11
14
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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 Manly-South Steyne Surf forecast

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

Manly-South Steyne is 5 km (3 miles) from Dee Why. If you plan a holiday in Sydney North Coast, look for hotels and other accommodation in Dee Why. Dee Why has rooms for a wide range of budgets as well as car hire and transport links.

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