Surf Forecasts:
Manly-South Steyne surf forecast from 29 Aug 2026:
- Best quality surf: Sunday 30 Aug, 7AM (local time) - 2.5ft (0.8m), 9s period, S swell with cross-offshore winds.
- Most powerful swell: Tuesday 1 Sep, 7AM (local time) - 3ft (0.9m), 11s period, S swell with 181 kJ wave energy.
- Next surfable swell (1★+): Sunday 30 Aug, 7AM (local time) - 2.5ft (0.8m), 9s 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 Sunday (Aug 30) at 7AM. The primary swell is predicted to be 0.8m and 9s period with a secondary swell of 0.7m and 10s. 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 0.9m 11s and forecast to arrive on Tuesday (Sep 01) at 7AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Saturday (Sep 05) at 4PM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Sun 30th Aug) | 2.5ft (0.8m) 9s |
| Best Surf | 7AM (Sun 30th Aug) | 2.5ft (0.8m) 9s |
| Most Powerful | 7AM (Tue 1st Sep) | 3ft (0.9m) 11s |
Table - best surf conditions forecast for Manly-South Steyne over the next 16 days.
The Lowdown
Alright, let’s break it down. For Manly-South Steyne, it’s a slow start, but there’s a solid window later on that’s worth planning for.
Right now, the first few days are small and inconsistent. Sunday the 30th has a 3ft south swell, but the wind is cross-off, so it’s not making the most of it. The water temp is about average for this time of year. Monday morning the 31st turns glassy with a 3ft south swell, and that’s about as good as it gets for the first week. The swell energy is weak to moderate, with values around 185 to 227 (combined energy of all swells directed here). It’s surfable, but nothing to write home about, and the break is inconsistent, so don’t expect a long session.
From Tuesday the 1st of September through to the 8th, it’s mostly small, poor, or onshore. There’s a few moments of clean conditions with cross-off winds, but the swell drops below 3ft, and the energy trails off into the double digits. The 3rd of September has a glassy afternoon with a 2ft south swell, but it’s barely a ripple. The 7th of September has a 19 mph offshore wind, but the swell is only 3ft and the period is short at 7 seconds, so it’s not going to hold any shape.
The real standout kicks off on Thursday the 10th of September. That morning, we’ve got a 7ft south swell with glassy conditions – offshore wind (NNW) at 3 mph. This is the one. The combined energy is a strong 1055 (combined energy of all swells directed here), and the period is 10 seconds. That’s solid groundswell. At 7ft, it’s getting into expert territory, so this is not for the faint-hearted. The break is a reef, so with that size and a south swell, it’ll be shallow and powerful. The optimum swell direction is south, so it’s plugging right in. Crowds are sometimes an issue here, so be ready for a crew. The 11th of September morning still has a 5ft south swell with clean cross-off winds, but the energy drops to 369. It’s still a good option, but the Thursday morning is the peak.
After that, things fade. The 12th and 13th of September are small and onshore, with swell dropping below 3ft. The 14th of September is a flat, glassy morning with only 0.7ft of south swell. That’s a wrap.
The first week is a write-off for any proper waves. The second week has a few shots, but the one standout is Thursday the 10th of September morning. If you’re keen, that’s your window.
Rusty
Short Range ForecastMostly dry. Warm (max 26°C on Tue afternoon, min 12°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 27°C on Wed morning, min 14°C on Thu night). Wind will be generally light. | ||||||||||||||||||
Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | ||||||||||||||
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) | SSE 10 | S 9 | S 9 | S 9 | S 8 | S 9 | S 9 | S 11 | S 11 | S 10 | S 10 | S 10 | S 10 | SSE 10 | S 11 | SSE 10 | S 10 | SSE 19 | S 11 |
Wave Graph  | |||||||||||||||||||
 kJ | 157 | 159 | 123 | 164 | 111 | 99 | 133 | 143 | 146 | 102 | 74 | 52 | 48 | 31 | 58 | 32 | 49 | 69 | 84 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-off | cross-on | glassy | glassy | on | cross | cross | cross-off | cross-off | cross-off | cross-off | cross-off | off | glassy | off | off | on | cross |
High Tide | 9:25AM1.34m | 9:30PM1.43m | 10:02AM1.38m | 10:10PM1.34m | 10:43AM1.41m | 10:55PM1.23m | 11:28AM1.42m | 11:49PM1.12m | 12:22PM1.41m | 00:55AM1.01m | 1:26PM1.40m | 2:18AM0.94m | |||||||
Low Tide | 3:16AM0.10m | 3:22PM0.24m | 3:48AM0.13m | 4:07PM0.25m | 4:22AM0.17m | 4:57PM0.28m | 5:00AM0.24m | 5:55PM0.31m | 5:44AM0.32m | 7:04PM0.34m | 6:39AM0.39m | 8:25PM0.34m | |||||||
 |  | | | | | | | | | | | |  | | | | | | |
 | — | 6:16 | — | — | 6:15 | — | — | 6:13 | — | — | 6:13 | — | — | 6:11 | — | — | 6:09 | — | — |
 | — | — | 5:34 | — | — | 5:35 | — | — | 5:36 | — | — | 5:36 | — | — | 5:37 | — | — | 5:37 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 14 | 17 | 15 | 15 | 17 | 16 | 16 | 23 | 26 | 20 | 27 | 27 | 21 | 24 | 23 | 17 | 20 | 18 | 17 |
Feels °C | 13 | 15 | 13 | 16 | 14 | 13 | 15 | 19 | 22 | 16 | 22 | 21 | 18 | 21 | 21 | 12 | 17 | 14 | 16 |
Swell 1 Height (m) Direction Period (s) | SSE 10 | S 9 | S 9 | S 9 | S 8 | S 9 | S 9 | S 11 | S 11 | S 10 | S 10 | S 10 | S 10 | S 7 | S 11 | SSW 5 | S 10 | S 6 | S 11 |
| kJ | 157 | 159 | 123 | 164 | 111 | 99 | 133 | 143 | 146 | 102 | 74 | 52 | 48 | 24 | 58 | 7 | 49 | 13 | 84 |
Swell 2 Height (m) Direction Period (s) | S 8 | SE 9 | ENE 8 | SSE 18 | SSE 15 | SSE 16 | NE 4 | ENE 9 | NE 5 | ENE 6 | NE 5 | ENE 10 | ENE 10 | SSE 10 | ENE 10 | SSE 10 | S 6 | SSE 11 | NE 5 |
| kJ | 65 | 68 | 24 | 102 | 74 | 50 | 5 | 15 | 17 | 22 | 10 | 19 | 19 | 31 | 19 | 32 | 13 | 25 | 15 |
Swell 3 Height (m) Direction Period (s) | ENE 9 | ENE 9 | S 17 | ENE 8 | ENE 9 | ENE 9 | ENE 9 | ENE 11 | ENE 11 | ENE 10 | ENE 10 | NE 6 | ENE 6 | ENE 10 | NE 6 | ENE 10 | ENE 10 | SSE 19 | S 7 |
| kJ | 27 | 25 | 22 | 14 | 17 | 16 | 15 | 12 | 37 | 20 | 33 | 5 | 3 | 19 | 6 | 19 | 19 | 69 | 16 |
Wind waves Height (m) Direction Period (s) | — | — | SE 9 | — | — | ENE 3 | NNE 4 | NNE 4 | NE 5 | NNW 3 | NW 3 | WNW 3 | NW 2 | W 3 | S 6 | WSW 3 | WNW 2 | ENE 3 | — |
| kJ | — | — | 52 | — | — | 3 | 13 | 3 | 49 | 4 | 2 | 3 | 1 | 1 | 18 | 3 | 1 | 3 | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 0 | 28 | 0 | 0 | 28 | 3 | 3 | 0 | 4 | 1 | 3 | 3 | 1 | 0 | 7 | 0 | 117 | 3 |
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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