Surf Forecasts:
Castles surf forecast from 26 Aug 2026:
- Best quality surf: Thursday 27 Aug, 6PM (local time) - 5ft (1.6m), 18s period, SW swell with cross-offshore winds.
- Most powerful swell: Monday 31 Aug, 9AM (local time) - 5ft (1.6m), 19s period, SW swell with 1,695 kJ wave energy.
- Next surfable swell (1★+): Thursday 27 Aug, 6PM (local time) - 5ft (1.6m), 18s period with SW swell.
Best Forecast Surf Conditions for Castles this week:
The surf forecast for Castles over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Aug 27) at 6PM. The primary swell is predicted to be 1.6m and 18s period. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Castles in the next 16 days are 1.6m 19s and forecast to arrive on Monday (Aug 31) at 9AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Thursday (Aug 27) at 9AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Thu 27th Aug) | 5ft (1.6m) 18s |
| Best Surf | 6PM (Thu 27th Aug) | 5ft (1.6m) 18s |
| Most Powerful | 9AM (Mon 31st Aug) | 5ft (1.6m) 19s |
Table - best surf conditions forecast for Castles over the next 16 days.
The Lowdown
G'day, it's Rusty here, and I've been poring over the charts for our local patch. We've got a solid run of swell coming our way, but the wind is going to be the real story, dictating when we can actually get out there. The water's sitting at a pretty normal 60° for this time of year, so no need for a thick steamer.
The action kicks off on Wednesday the 26th of August. The first call is a beauty – Castles is showing 3 ft of SW groundswell with a 12-second period. The energy is a bit weak (350), but the real magic is that glassy NE wind at only 3 mph. It's a beginner-friendly reef, so it's a great session for the learners or anyone wanting a cruisy, clean wave to start.
We hit a bit of a lull on Thursday morning, but the afternoon of the 27th gets interesting. The swell holds at 3 ft from the SW, but the period jumps to 19 seconds, making it a very long-period groundswell. The energy is strong (1157), but at a reef like Castles, that long period should produce some nice, walled-up lines. The wind is a cross-off from the N at 9 mph, keeping it clean.
The first real standout is Friday the 28th of August. The morning is a ripper for the more experienced crew. We've got 5 ft of SW swell at 16 seconds, with a strong energy reading (1144). The wind is a light cross-off from the NNE at 6 mph, promising clean, powerful waves. The afternoon cleans up further with glassy conditions from the WNW at 3 mph and the swell dropping just a touch to 5 ft – still a fantastic session.
Saturday the 29th of August offers a solid morning with 3 ft of SW swell and a nice offshore wind from the E at 9 mph. The afternoon gets tricky with a cross-offshore wind, so the morning is the window.
Sunday the 30th of August is another one for the early birds. The wind is a clean offshore from the E at 12 mph, grooming 2 ft of SW groundswell with a very long 19-second period. The energy is moderate (411), good for a longboard or a fun fish.
The energy picks up for Monday the 31st of August. The afternoon session is a standout for experienced surfers. We're looking at 5 ft of SW swell at 18 seconds, with a massive energy of 1327. The wind is a cross-off from the NNE at 9 mph, keeping the surface clean. This is a session for the confident crew.
The start of September gets a bit messy. Tuesday the 1st is a write-off with strong onshores, and Wednesday the 2nd is poor with cross-onshore winds. We get a brief reprieve on Thursday the 3rd of September with a clean morning, but the afternoon turns onshore again.
The outlook really shines as we get into the second week. The standout of the entire forecast is Monday the 7th of September. The afternoon session is an absolute cracker. We're talking 8 ft of SW groundswell at 14 seconds, with a massive energy of 3360. The wind is a clean offshore from the NE at only 6 mph. This is a big, powerful swell, but with offshore winds, Castles will be firing. This is an expert-only session due to the size, but for those who can handle it, it's the best on offer.
The following week is a bit more mixed. We get a clean morning on Thursday the 10th of September with 4 ft of SW swell and a solid offshore wind from the E, but overall the consistency drops off.
So, to wrap it up, get out on the 26th of August for a glassy beginner wave, lock in the 28th of August for a solid clean day, and circle the 7th of September in your calendar. That final session is the one you'll be telling your mates about.
Rusty.
Short Range ForecastMostly dry. Warm (max 25°C on Thu afternoon, min 17°C on Wed night). Winds decreasing (fresh winds from the N on Thu morning, light winds from the NE by Fri afternoon). | Days 5-7 Weather SummaryMostly dry. Warm (max 29°C on Tue afternoon, min 18°C on Mon morning). Winds increasing (light winds from the ENE on Sun morning, fresh winds from the N by Tue morning). | ||||||||||||||||||
Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | ||||||||||||||
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) | SW 14 | SW 14 | SW 19 | SW 17 | SW 16 | SW 16 | SW 14 | SW 14 | SW 13 | SW 13 | SW 19 | SW 19 | SW 17 | SW 19 | SW 18 | SW 16 | SW 16 | SW 17 | SW 16 |
Wave Graph | |||||||||||||||||||
297 | 466 | 614 | 1597 | 1144 | 906 | 536 | 382 | 290 | 193 | 236 | 887 | 1050 | 1695 | 1453 | 909 | 635 | 822 | 728 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | cross-off | cross-off | cross-off | cross-off | off | off | cross-off | cross-off | off | cross-off | off | cross-off | cross-off | cross-off | cross-off | cross | cross-on |
High Tide | 00:22AM0.89m | 12:24PM1.38m | 00:36AM1.00m | 12:43PM1.41m | 00:53AM1.09m | 1:03PM1.40m | 1:13AM1.18m | 1:22PM1.34m | 1:34AM1.23m | 1:40PM1.24m | 1:55AM1.26m | 1:54PM1.12m | 2:17AM1.24m | ||||||
Low Tide | 5:57AM0.09m | 6:51PM0.02m | 6:21AM0.00m | 7:04PM-0.02m | 6:45AM-0.05m | 7:18PM-0.05m | 7:10AM-0.06m | 7:32PM-0.05m | 7:36AM-0.03m | 7:45PM-0.04m | 8:01AM0.06m | 7:57PM-0.01m | |||||||
— | 7:01 | — | — | 7:01 | — | — | 6:58 | — | — | 6:58 | — | — | 6:56 | — | — | 6:56 | — | — | |
6:16 | — | 6:16 | — | — | 6:17 | — | — | 6:19 | — | — | 6:19 | — | — | 6:20 | — | — | 6:20 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 18 | 22 | 25 | 24 | 21 | 23 | 23 | 23 | 23 | 20 | 22 | 23 | 20 | 22 | 24 | 23 | 26 | 29 | 20 |
Feels °C | 14 | 16 | 20 | 19 | 17 | 20 | 19 | 19 | 18 | 15 | 18 | 19 | 16 | 17 | 19 | 18 | 18 | 24 | 19 |
Swell 1 Height (m) Direction Period (s) | SW 14 | SW 14 | SW 15 | SW 17 | SW 16 | SW 16 | SW 14 | SW 14 | SW 13 | SW 13 | SW 12 | SW 19 | SW 17 | SW 19 | SW 18 | SW 16 | SW 16 | SW 17 | SW 16 |
297 | 466 | 543 | 1597 | 1144 | 906 | 536 | 382 | 290 | 193 | 175 | 887 | 1050 | 1695 | 1453 | 909 | 635 | 822 | 728 | |
Swell 2 Height (m) Direction Period (s) | SW 23 | SW 20 | SW 19 | — | — | — | W 5 | SW 23 | SW 20 | SW 21 | SW 19 | — | SW 21 | — | — | — | — | — | — |
21 | 198 | 614 | — | — | — | 2 | 21 | 16 | 160 | 236 | — | 162 | — | — | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | SW 24 | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | 22 | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | ENE 3 | N 4 | — | N 3 | — | — | ESE 3 | — | — | SE 4 | — | — | — | — | — | N 3 | NNW 4 | WNW 4 | SSW 4 |
3 | 13 | — | 5 | — | — | 4 | — | — | 10 | — | — | — | — | — | 3 | 15 | 12 | 24 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 402 | 1 | 1 | 178 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 1 | 0 | 1 | 1198 | 553 | 510 |
Best forecast wave conditions in Nullarbor | |||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||
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Information about the Castles Surf forecast
The above surf forecast table for Castles provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Castles can be found by selecting the local surf guide option on the grey menu. Our Castles 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 (Castles) 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 Castles 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.
Are you planning a holiday in Nullarbor? If you are looking for accommodation near Castles, camping, hotels and holiday cottages in Nullarbor, consider staying in Thevenard which is 64 km (40 miles) away.











