Surf Forecasts:
Collaroy surf forecast from 17 Jul 2026:
- Best quality surf: Sunday 19 Jul, 7AM (local time) - 7.5ft (2.3m), 11s period, ENE swell with cross-offshore winds.
- Most powerful swell: Sunday 19 Jul, 4AM (local time) - 7ft (2.2m), 12s period, ENE swell with 1,230 kJ wave energy.
- Next surfable swell (1★+): Saturday 18 Jul, 7AM (local time) - 3.5ft (1.0m), 6s period with E swell.
Best Forecast Surf Conditions for Collaroy this week:
The surf forecast for Collaroy over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Jul 18) at 7AM. The primary swell is predicted to be 1.0m and 6s period. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Collaroy in the next 16 days are 2.2m 12s and forecast to arrive on Sunday (Jul 19) at 4AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 8s period and expected on Thursday (Jul 23) at 10PM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Sat 18th Jul) | 3.5ft (1.0m) 6s |
| Best Surf | 7AM (Sun 19th Jul) | 7.5ft (2.3m) 11s |
| Most Powerful | 4AM (Sun 19th Jul) | 7ft (2.2m) 12s |
Table - best surf conditions forecast for Collaroy over the next 16 days.
The Lowdown
Alright, it’s Rusty again, giving you the rundown in feet and miles per hour.
The next 16 days at Collaroy start off slow, but there’s a solid window of decent swell mid-period that’s worth a look. Water temp is about 64°F, which is average for the season.
First chance to paddle out is Friday July 17th, but it’s a waste of time. A tiny 2ft east swell with a weak 6-second period and combined energy of 54. Glassy, but no power.
Saturday July 18th is still no good. The swell bumps to 3ft in the morning, but the wind is cross-off from the SSE at 12 mph, and energy is only 83. The afternoon has a 4ft east swell, period up to 7 seconds, and energy at 121, but it’s cross-shore and messy.
Sunday July 19th is the one. The morning brings a 7ft ENE swell with a long 11-second period, and the combined energy jumps to 1078 – that’s strong. The wind is light and cross-shore. The afternoon cleans up with clear skies, a 7ft swell, still 10 seconds, and energy at 787. The swell direction is right on the money for Collaroy’s optimum from the NE. With the swell over 5ft, it’s too big for beginners, and you might find a few others out there ("sometimes" crowds). This is your best bet.
Monday July 20th morning is still good: a 6ft ENE swell, 10-second period, 594 energy, and a light cross-off wind from the west. Clean. The afternoon turns onshore from the NE at 9 mph, so it’ll get choppy.
Tuesday July 21st morning is glassy with a 5ft ENE swell, 10-second period, and 380 energy. That’s a real gem for the experienced crew.
After Tuesday, it’s a slow fade. Wednesday July 22nd has a 3ft swell, energy dropping to 164, but Wednesday afternoon goes glassy again with a 3ft swell. Thursday is small and clean. By Friday July 24th, it’s back to 2ft and weak.
From Saturday July 25th all the way to August 1st, it’s flat. Swell heights drop to 1ft and below, with energy in the single digits. Even with offshore winds, there’s nothing to ride. The second week is a total washout.
So, your standout is Sunday July 19th, with the morning offering the biggest, most powerful swell. Tuesday morning July 21st is the runner-up for a cleaner session. After that, you’re better off doing something else.
Rusty.
Short Range ForecastSome drizzle, heaviest during Fri afternoon. Very mild (max 17°C on Sat morning, min 13°C on Sun night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 20°C on Wed afternoon, min 10°C on Wed night). Wind will be generally light. | |||||||||||||||||||
Fri 17 | Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | ||||||||||||||
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) | E 6 | E 6 | E 6 | E 7 | E 9 | ENE 11 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 |
Wave Graph  | ||||||||||||||||||||
 kJ | 35 | 65 | 83 | 121 | 425 | 1066 | 787 | 740 | 585 | 510 | 455 | 380 | 380 | 258 | 164 | 121 | 94 | 98 | 94 | 70 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-off | cross-off | cross | cross | cross | cross | glassy | cross-off | on | cross | glassy | cross-on | cross-off | cross-off | glassy | cross-off | cross-off | cross-off | cross-off |
High Tide | 10:30PM1.64m | 11:22AM1.24m | 11:17PM1.49m | 12:10PM1.25m | 00:04AM1.32m | 1:00PM1.27m | 00:55AM1.15m | 1:52PM1.28m | 1:52AM1.02m | 2:46PM1.29m | 2:58AM0.92m | 3:41PM1.31m | ||||||||
Low Tide | 4:09PM0.28m | 5:12AM0.05m | 5:03PM0.34m | 5:53AM0.13m | 6:01PM0.41m | 6:32AM0.23m | 7:04PM0.47m | 7:12AM0.32m | 8:14PM0.51m | 7:55AM0.40m | 9:28PM0.51m | 8:44AM0.46m | 10:38PM0.48m | |||||||
 |  |  |  |  | |  | | | | | | | | | | | | | | |
 | — | — | 6:56 | — | — | 6:54 | — | — | 6:54 | — | — | 6:54 | — | — | 6:54 | — | — | 6:52 | — | — |
 | 5:05 | — | — | 5:05 | — | — | 5:06 | — | — | 5:06 | — | — | 5:07 | — | — | 5:07 | — | — | 5:07 | — |
mm | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 16 | 16 | 17 | 17 | 17 | 17 | 16 | 15 | 15 | 15 | 14 | 15 | 15 | 15 | 18 | 20 | 15 | 16 | 15 | 14 |
Feels °C | 16 | 15 | 13 | 13 | 13 | 13 | 14 | 14 | 13 | 12 | 12 | 14 | 14 | 14 | 15 | 18 | 11 | 13 | 11 | 12 |
Swell 1 Height (m) Direction Period (s) | E 6 | E 6 | E 6 | E 7 | E 9 | ENE 11 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | S 7 |
| kJ | 35 | 65 | 83 | 121 | 425 | 1066 | 787 | 740 | 585 | 510 | 455 | 380 | 380 | 258 | 164 | 121 | 94 | 98 | 94 | 131 |
Swell 2 Height (m) Direction Period (s) | S 6 | S 10 | S 10 | S 10 | S 9 | S 17 | S 16 | S 13 | S 12 | S 12 | S 11 | S 11 | S 10 | S 10 | S 10 | S 11 | S 10 | S 10 | S 10 | ENE 9 |
| kJ | 32 | 106 | 48 | 45 | 24 | 211 | 122 | 160 | 184 | 175 | 84 | 56 | 49 | 31 | 30 | 20 | 18 | 8 | 17 | 70 |
Swell 3 Height (m) Direction Period (s) | ENE 8 | S 21 | S 21 | S 20 | S 18 | SE 17 | S 8 | SE 16 | SE 15 | SE 15 | SE 14 | S 16 | S 15 | S 14 | S 12 | S 13 | — | — | S 17 | S 14 |
| kJ | 19 | 35 | 34 | 32 | 107 | 12 | 11 | 10 | 9 | 8 | 8 | 19 | 17 | 4 | 3 | 3 | — | — | 6 | 15 |
Wind waves Height (m) Direction Period (s) | — | — | S 4 | S 4 | — | — | — | — | — | — | — | — | — | — | WNW 2 | WSW 3 | SW 4 | SSW 4 | S 5 | — |
| kJ | — | — | 12 | 3 | — | — | — | — | — | — | — | — | — | — | 1 | 1 | 6 | 8 | 28 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 1 | 1 | 67 | 79 | 5 | 38 | 5 | 0 | 0 | 11 | 1 | 0 | 170 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
Best forecast wave conditions in Sydney North Coast | ||||||||||||||||||||
Best forecast wave conditions in Australia | ||||||||||||||||||||
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Information about the Collaroy Surf forecast
The above surf forecast table for Collaroy provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Collaroy can be found by selecting the local surf guide option on the grey menu. Our Collaroy 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 (Collaroy) 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 Collaroy 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.
Collaroy is 2 km (1 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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