Surf Forecasts:
Shark Island (Cronulla) surf forecast from 13 Sep 2026:
- Best quality surf: Thursday 17 Sep, 7PM (local time) - 7ft (2.1m), 9s period, SSE swell with cross-offshore winds.
- Most powerful swell: Thursday 17 Sep, 1AM (local time) - 11ft (3.5m), 10s period, S swell with 2,802 kJ wave energy.
- Next surfable swell (1★+): Tuesday 15 Sep, 4AM (local time) - 3ft (0.9m), 6s period with NE swell.
Best Forecast Surf Conditions for Shark Island (Cronulla) this week:
The surf forecast for Shark Island (Cronulla) over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Sep 15) at 4AM. The primary swell is predicted to be 0.9m and 6s period with a secondary swell of 0.4m and 10s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Shark Island (Cronulla) in the next 16 days are 3.5m 10s and forecast to arrive on Thursday (Sep 17) at 1AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 6s period and expected on Sunday (Sep 13) at 10PM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4AM (Tue 15th Sep) | 3ft (0.9m) 6s |
| Best Surf | 7PM (Thu 17th Sep) | 7ft (2.1m) 9s |
| Most Powerful | 1AM (Thu 17th Sep) | 11ft (3.5m) 10s |
Table - best surf conditions forecast for Shark Island (Cronulla) over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s break it down. It’s gonna be a tough slog for most of this forecast, but there’s a serious bite coming for the big-wave boys.
First off, the water temp at Shark Island (Cronulla) is about 63°, which is only a touch below the average for this time of year – nothing wild, just the usual cool late-winter water.
The first five days are a write-off. We’re dealing with tiny, weak, onshore slop with combined energy barely hitting 200. The only clean moment is Tuesday the 15th, with light winds but the swell is a pathetic 0.7m from the NE with a short 7-second period and only 62 energy. A complete non-event.
Then it gets real. Wednesday the 16th sees a big S swell hit, starting at 3.0m and pushing 3.5m by afternoon, with strong S direction and 9-10 second periods. Combined energy rockets into the thousands (1439, then 2702). The wind is cross-off from the SSW/S, keeping it clean, but this is expert-only territory – over 2.5m is no place for the faint of heart. Thursday the 17th is the real standout: morning still at 3.0m (energy 3360) easing to a more manageable 2.3m by afternoon (energy 930) with clean cross-off winds. That Thursday afternoon session is the pick of the bunch – solid, powerful, and clean for those with the nerve.
Friday the 18th drops off fast to around 1.6m and gets messy. The weekend of the 19th-20th is flat and worthless.
Monday the 21st offers a quick hit: 2.5m of S swell in the morning (energy 1268) with clean cross-off wind, but it goes to crap by afternoon. One chance for the early bird.
The second week is mostly junk – knee-high dribble, onshore winds, and poor conditions. The one exception is Sunday the 27th morning: glassy conditions, a light NE wind, and a little 1.6m of NE windswell with 8-second period and moderate energy (448). It’s the only “good” surf noted in the whole run. Small and clean for a log or a funboard.
Best on offer: Thursday the 17th afternoon at Shark Island. Big S swell, clean cross-off, dropping into the 2.3m range with real energy. That’s the one for the locals who mean it.
Rusty
Short Range ForecastSome drizzle, heaviest during Tue afternoon. Warm (max 24°C on Mon afternoon, min 10°C on Tue night). Winds increasing (light winds from the WSW on Mon night, strong winds from the SSW by Wed morning). | Days 5-7 Weather SummaryMostly dry. Warm (max 24°C on Sat morning, min 9°C on Wed night). Winds decreasing (strong winds from the S on Wed afternoon, light winds from the SSW by Sat morning). | |||||||||||||||||||
Sun 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | ||||||||||||||
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 10 | NE 7 | S 11 | S 11 | NE 6 | NE 7 | ENE 7 | S 8 | S 9 | S 10 | S 10 | S 10 | SSE 10 | SSE 9 | SSE 9 | SSE 9 | S 9 | SSE 17 | S 9 | S 9 |
Wave Graph  | ||||||||||||||||||||
 kJ | 135 | 102 | 86 | 82 | 58 | 47 | 31 | 1148 | 1433 | 2702 | 2802 | 1930 | 920 | 499 | 380 | 315 | 132 | 97 | 60 | 26 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross | cross-on | on | cross | cross-off | cross-off | cross-off | cross-off | cross-off | off | cross-off | cross-off | cross-off | cross | on | cross-off | off | on | cross |
High Tide | 9:42PM1.38m | 10:04AM1.47m | 10:22PM1.25m | 10:41AM1.44m | 11:04PM1.12m | 11:21AM1.39m | 11:51PM1.01m | 12:07PM1.33m | 00:47AM0.92m | 1:03PM1.27m | 2:01AM0.87m | 2:11PM1.24m | 3:25AM0.87m | |||||||
Low Tide | 3:47AM0.21m | 4:22PM0.24m | 4:19AM0.29m | 5:09PM0.31m | 4:51AM0.38m | 6:00PM0.38m | 5:28AM0.47m | 6:59PM0.45m | 6:13AM0.55m | 8:11PM0.49m | 7:14AM0.60m | 9:27PM0.48m | ||||||||
 |  |  | |  | |  | | | | | | | | | | | | | | |
 | — | — | 5:56 | — | — | 5:56 | — | — | 5:54 | — | — | 5:52 | — | — | 5:50 | — | — | 5:50 | — | — |
 | 5:44 | — | — | 5:45 | — | — | 5:45 | — | — | 5:45 | — | — | 5:46 | — | — | 5:47 | — | — | 5:47 | — |
mm | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 18 | 17 | 23 | 24 | 22 | 20 | 17 | 12 | 13 | 14 | 13 | 14 | 13 | 13 | 19 | 19 | 17 | 24 | 24 | 21 |
Feels °C | 13 | 15 | 19 | 19 | 19 | 18 | 14 | 4 | 3 | 3 | 4 | 8 | 9 | 11 | 14 | 15 | 14 | 19 | 18 | 18 |
Swell 1 Height (m) Direction Period (s) | S 10 | NE 7 | NE 6 | S 11 | NE 6 | NE 7 | ENE 7 | NE 7 | NE 7 | — | ENE 13 | S 10 | SSE 10 | SSE 9 | SSE 9 | SSE 9 | S 9 | S 9 | S 9 | S 9 |
| kJ | 135 | 100 | 40 | 82 | 58 | 47 | 31 | 7 | 2 | — | 17 | 1420 | 920 | 499 | 380 | 315 | 132 | 76 | 55 | 25 |
Swell 2 Height (m) Direction Period (s) | ENE 13 | S 10 | S 11 | ENE 13 | SSE 10 | S 9 | S 9 | E 14 | E 14 | — | — | E 13 | S 19 | E 13 | E 12 | ESE 10 | SE 8 | SE 8 | SE 8 | SE 9 |
| kJ | 17 | 102 | 86 | 16 | 32 | 15 | 14 | 4 | 4 | — | — | 3 | 7 | 3 | 3 | 10 | 67 | 53 | 21 | 20 |
Swell 3 Height (m) Direction Period (s) | ENE 13 | E 13 | ENE 13 | E 9 | E 12 | — | E 13 | — | — | — | — | S 19 | E 13 | — | S 18 | SSE 18 | SSE 17 | SSE 17 | SSE 18 | SSE 16 |
| kJ | 17 | 13 | 17 | 2 | 12 | — | 13 | — | — | — | — | 7 | 3 | — | 6 | 30 | 95 | 97 | 60 | 26 |
Wind waves Height (m) Direction Period (s) | ENE 4 | N 7 | — | NE 6 | — | WSW 3 | SSE 4 | S 8 | S 9 | S 10 | S 10 | S 10 | — | — | — | — | — | — | ENE 2 | — |
| kJ | 35 | 59 | — | 28 | — | 1 | 11 | 1148 | 1433 | 2702 | 2802 | 1930 | — | — | — | — | — | — | 1 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 147 | 1 | 1 | 5 | 1 | 0 | 67 | 120 | 874 | 694 | 153 | 43 | 82 | 0 | 1 | 41 | 1 | 0 | 41 | 1 |
Best forecast wave conditions in Sydney South Coast | ||||||||||||||||||||
Best forecast wave conditions in Australia | ||||||||||||||||||||
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Information about the Shark Island (Cronulla) Surf forecast
The above surf forecast table for Shark Island (Cronulla) provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Shark Island (Cronulla) can be found by selecting the local surf guide option on the grey menu. Our Shark Island (Cronulla) 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 (Shark Island (Cronulla)) 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 Shark Island (Cronulla) 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.
Shark Island (Cronulla) is 2 km (1 miles) from Cronulla. If you plan a holiday in Sydney South Coast, look for hotels and other accommodation in Cronulla. Cronulla has rooms for a wide range of budgets as well as car hire and transport links.
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