
Surf Forecasts:
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 Type | Time (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 ForecastMostly dry. Very mild (max 19°C on Wed afternoon, min 10°C on Thu night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy 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 | |
Swell Height Map | |||||||||||||||||||
Wave Height (m) Direction Period (s) | S 11 | S 10 | S 9 | S 8 | S 8 | S 9 | S 8 | S 9 | S 8 | S 7 | S 8 | S 7 | SSE 7 | SSE 6 | SSE 6 | SE 7 | ESE 7 | ESE 7 | E 7 |
Wave Graph | |||||||||||||||||||
432 | 219 | 126 | 86 | 99 | 470 | 142 | 189 | 165 | 155 | 397 | 320 | 168 | 140 | 215 | 317 | 258 | 244 | 230 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | 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 | |||||||
— | 6:37 | — | — | 6:35 | — | — | 6:35 | — | — | 6:33 | — | — | 6:33 | — | — | 6:31 | — | — | |
— | — | 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 |
Swell 1 Height (m) Direction Period (s) | S 11 | S 10 | S 9 | S 8 | S 8 | S 8 | S 8 | S 9 | S 8 | SSE 7 | ENE 9 | ENE 9 | ENE 10 | SSE 15 | S 12 | S 11 | S 9 | S 9 | SSE 7 |
432 | 219 | 126 | 86 | 99 | 283 | 142 | 189 | 165 | 89 | 17 | 17 | 18 | 47 | 45 | 57 | 58 | 42 | 61 | |
Swell 2 Height (m) Direction Period (s) | ENE 9 | ENE 10 | ENE 10 | E 9 | ENE 10 | ENE 9 | ENE 9 | ENE 10 | ENE 9 | ENE 9 | S 19 | SSE 19 | SSE 17 | ENE 10 | ENE 10 | ENE 10 | E 9 | — | S 8 |
49 | 52 | 52 | 44 | 31 | 29 | 29 | 30 | 29 | 17 | 7 | 36 | 57 | 18 | 20 | 11 | 41 | — | 35 | |
Swell 3 Height (m) Direction Period (s) | — | — | S 18 | S 13 | — | — | S 14 | S 19 | S 16 | SE 9 | S 20 | S 14 | ENE 10 | S 13 | S 18 | S 16 | S 16 | — | S 14 |
— | — | 6 | 3 | — | — | 16 | 28 | 20 | 3 | 8 | 4 | 18 | 4 | 6 | 21 | 20 | — | 4 | |
Wind waves Height (m) Direction Period (s) | W 3 | — | — | W 3 | W 3 | S 9 | WSW 2 | — | — | S 7 | S 8 | S 7 | SSE 7 | SSE 6 | SSE 6 | SE 7 | ESE 7 | ESE 7 | E 7 |
5 | — | — | 6 | 1 | 470 | 1 | — | — | 155 | 397 | 320 | 168 | 140 | 215 | 317 | 258 | 244 | 230 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 1 | 0 | 99 | 0 | 0 | 28 | 0 | 152 | 63 | 0 | 113 | 113 | 232 | 163 | 307 | 119 |
Best forecast wave conditions in Sydney North Coast | |||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||
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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.











