Surf Forecasts:
Manly-South Steyne surf forecast from 14 Sep 2026:
- Best quality surf: Thursday 17 Sep, 10PM (local time) - 6ft (1.8m), 9s period, SSE swell with glassy winds.
- Most powerful swell: Thursday 17 Sep, 1AM (local time) - 11ft (3.5m), 11s period, S swell with 3,160 kJ wave energy.
- Next surfable swell (1★+): Thursday 17 Sep, 10PM (local time) - 6ft (1.8m), 9s period with SSE 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 Thursday (Sep 17) at 10PM. The primary swell is predicted to be 1.8m and 9s period with a secondary swell of 0.1m and 13s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Manly-South Steyne in the next 16 days are 3.5m 11s and forecast to arrive on Thursday (Sep 17) at 1AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.6m 6s period and expected on Monday (Sep 14) at 10PM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Thu 17th Sep) | 6ft (1.8m) 9s |
| Best Surf | 10PM (Thu 17th Sep) | 6ft (1.8m) 9s |
| Most Powerful | 1AM (Thu 17th Sep) | 11ft (3.5m) 11s |
Table - best surf conditions forecast for Manly-South Steyne over the next 16 days.
The Lowdown
Alright, let’s talk Manly-South Steyne. This is a sheltered reef break that’s inconsistent and only really works on a southerly swell. Water temp is about 63°F, a bit cooler than usual for this time of year – you’ll want a wetsuit.
We’ve got a dry spell right off the bat. Monday 14th and Tuesday 15th are flat to near-flat with poor conditions – not worth a look. A few days with nothing.
Then Wednesday 16th – bam. A solid S swell hits 10 ft with a 10-second period. Combined energy is 1741 (moderate to strong). It’s clean with a light offshore breeze. This is big, powerful, and only for advanced surfers at this inconsistent reef. The swell direction matches the optimum – S – so it should line up. This is the clear standout for the whole 16-day window.
Thursday 17th stays big – still 10 ft in the morning with a moderate offshore wind and energy up at 3405 (very strong). Still expert territory. Afternoon drops to about 7 ft but wind goes cross-on and messes it up.
Friday 18th the swell drops to about 4 ft with glassy conditions. Energy is 273 – weaker but clean. It’s surfable, but ordinary.
Saturday 19th and Sunday 20th are small again – under 3 ft – with onshore winds and poor surf.
Monday 21st: another pulse – about 8 ft of S swell with 12-second period, but a fresh cross-shore wind makes it lumpy. Energy is 1644, so there’s power, but not clean.
Tuesday 22nd: still decent at 7 ft but NE cross-on winds and choppy conditions.
Wednesday 23rd morning is the second standout. Swell drops to 4 ft but it’s glassy with a light offshore breeze and a long 12-second period. Energy is 496 (moderate). This is the “expect good surf” window – clean, lined up, and manageable. At an inconsistent spot like this, a glassy morning with chest-high sets and no crowds is a rare score.
After that, from Thursday 24th through the rest of the 16 days, it’s mostly small or onshore junk. Thursday 24th has 3 ft but strong S winds. Friday 25th is tiny – 0.3 ft – glassy but nothing to ride. Saturday 26th and Sunday 27th are choppy and small. Monday 28th sees another big pulse – 8 ft – but cloudy with fresh offshore wind and marginal conditions. Tuesday 29th has 10 ft with onshore winds – again, only for experts and not great.
So the best bets: Wednesday 16th morning for big, clean, expert-only waves, and Wednesday 23rd morning for a smaller, glassy session that’s much more user-friendly. The rest is a skip.
Rusty.
Short Range ForecastMostly dry. Warm (max 22°C on Mon night, min 10°C on Wed night). Winds increasing (light winds from the NNW on Mon night, strong winds from the S by Tue afternoon). | Days 4-6 Weather SummaryMostly dry. Warm (max 25°C on Sat morning, min 10°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | |||||||||||||||
AM | PM | 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 11 | SSE 10 | S 9 | S 9 | S 9 | S 10 | S 10 | S 11 | S 10 | SSE 10 | SSE 9 | SSE 9 | SSE 9 | S 9 | S 9 | S 9 | S 8 | SSE 8 | S 11 | S 11 |
Wave Graph  | |||||||||||||||||||||
 kJ | 86 | 82 | 32 | 15 | 25 | 1228 | 1737 | 1744 | 3160 | 1924 | 842 | 422 | 264 | 238 | 169 | 99 | 74 | 34 | 24 | 10 | 9 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross | cross-off | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-on | cross-off | glassy | on | cross-off | off | cross-on | cross-off | cross-off | cross-off | cross-off |
High Tide | 10:17PM1.22m | 10:36AM1.42m | 10:59PM1.09m | 11:16AM1.37m | 11:45PM0.98m | 12:02PM1.31m | 00:41AM0.90m | 12:58PM1.25m | 1:55AM0.85m | 2:06PM1.22m | 3:20AM0.85m | 3:17PM1.23m | |||||||||
Low Tide | 4:18PM0.23m | 4:13AM0.28m | 5:04PM0.29m | 4:46AM0.37m | 5:55PM0.37m | 5:22AM0.45m | 6:55PM0.43m | 6:06AM0.53m | 8:07PM0.47m | 7:07AM0.58m | 9:23PM0.47m | 8:26AM0.60m | 10:27PM0.43m | ||||||||
 | |  |  | |  | | | | | | | | | | | | | | | | |
 | 5:56 | — | — | 5:54 | — | — | 5:54 | — | — | 5:52 | — | — | 5:50 | — | — | 5:48 | — | — | 5:48 | — | — |
 | — | 5:45 | — | — | 5:45 | — | — | 5:45 | — | — | 5:46 | — | — | 5:46 | — | — | 5:47 | — | — | 5:49 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 21 | 21 | 22 | 21 | 17 | 13 | 13 | 14 | 14 | 14 | 13 | 13 | 18 | 17 | 17 | 25 | 22 | 20 | 28 | 31 | 24 |
Feels °C | 18 | 17 | 19 | 19 | 14 | 6 | 4 | 5 | 5 | 10 | 10 | 12 | 14 | 12 | 16 | 21 | 17 | 17 | 24 | 27 | 19 |
Swell 1 Height (m) Direction Period (s) | NE 6 | S 11 | ENE 6 | NE 7 | NE 7 | NE 7 | NE 12 | NE 12 | ENE 13 | S 10 | SSE 10 | SSE 9 | SSE 9 | SSE 9 | S 9 | S 9 | S 9 | S 8 | SSE 8 | NE 5 | NNE 5 |
| kJ | 40 | 82 | 69 | 49 | 37 | 7 | 6 | 6 | 17 | 1478 | 842 | 422 | 264 | 238 | 169 | 99 | 74 | 34 | 24 | 4 | 3 |
Swell 2 Height (m) Direction Period (s) | S 11 | ENE 13 | SSE 10 | S 9 | S 9 | E 14 | E 15 | E 15 | E 14 | E 13 | E 13 | E 13 | S 18 | SSE 18 | SSE 16 | SSE 17 | SSE 16 | NE 4 | NE 5 | S 8 | S 11 |
| kJ | 86 | 16 | 32 | 15 | 25 | 4 | 4 | 4 | 4 | 3 | 3 | 3 | 6 | 61 | 90 | 94 | 51 | 5 | 3 | 5 | 9 |
Swell 3 Height (m) Direction Period (s) | ENE 13 | — | E 12 | E 13 | E 13 | S 16 | — | — | — | — | S 19 | S 19 | E 12 | E 12 | E 12 | ENE 4 | E 12 | S 15 | E 9 | S 11 | E 8 |
| kJ | 17 | — | 12 | 3 | 3 | 5 | — | — | — | — | 7 | 7 | 3 | 3 | 3 | 2 | 3 | 17 | 1 | 10 | 1 |
Wind waves Height (m) Direction Period (s) | — | NE 6 | NE 6 | SW 3 | SE 4 | S 9 | S 10 | S 10 | S 11 | S 10 | — | — | — | — | NNE 3 | — | NE 3 | — | NW 3 | WNW 3 | SSW 4 |
| kJ | — | 49 | 201 | 1 | 10 | 1228 | 1737 | 1744 | 3160 | 1924 | — | — | — | — | 1 | — | 2 | — | 2 | 3 | 15 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 3 | 28 | 1 | 0 | 816 | 105 | 843 | 725 | 12 | 0 | 12 | 0 | 0 | 28 | 0 | 0 | 73 | 0 | 11 | 300 | 61 |
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.
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