
Surf Forecasts:
Castles surf forecast from 15 Jul 2026:
- Best quality surf: Wednesday 15 Jul, 3PM (local time) - 5ft (1.6m), 15s period, SW swell with offshore winds.
- Most powerful swell: Thursday 16 Jul, 3PM (local time) - 4.5ft (1.4m), 17s period, SW swell with 1,147 kJ wave energy.
- Next surfable swell (1★+): Wednesday 15 Jul, 3PM (local time) - 5ft (1.6m), 15s 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 Wednesday (Jul 15) at 3PM. The primary swell is predicted to be 1.6m and 15s period. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Castles in the next 16 days are 1.4m 17s and forecast to arrive on Thursday (Jul 16) at 3PM. 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 3s period and expected on Sunday (Jul 19) at 6AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3PM (Wed 15th Jul) | 5ft (1.6m) 15s |
| Best Surf | 3PM (Wed 15th Jul) | 5ft (1.6m) 15s |
| Most Powerful | 3PM (Thu 16th Jul) | 4.5ft (1.4m) 17s |
Table - best surf conditions forecast for Castles over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s have a look at what’s coming down the line for the next couple of weeks.
We’ve got a solid pulse of SW groundswell arriving, but it’s not messing around. This is a spot for experienced surfers only when it’s on, and for the first few days, that’s exactly the case. The water’s sitting at 60°, which is about average for this time of year, so nothing to write home about on that front.
The real action kicks off Wednesday morning, July 15th. Castles is waking up with a clean 6 ft SW swell at 15 seconds, and a light ENE breeze holding it offshore. The wave energy is strong, clocking in at 1204, and conditions are glassy and clean. This is the standout of the first week. The afternoon holds similar quality, with 5 ft and that same clean offshore wind. It’s not a beginner wave at this size and period, but for anyone who knows what they’re doing, it’s going to be firing.
Thursday, July 16th, the swell drops a touch to 5 ft, but the wind swings NNE and goes cross-offshore, so it stays clean. The energy is still solid at 1306 in the morning. The period is a long 15 to 17 seconds, which means long lines and waiting between sets. Perfect for a reef break like Castles.
Friday, July 17th, the swell backs off to 4 ft, and the wind is cross-offshore from the NNE. The energy drops to moderate levels (619), and the waves are still rideable for the experienced crew, but the magic is fading.
From Saturday, July 18th, through to Tuesday, July 21st, it’s a bit of a flat spell. The swell drops below 3 ft, the wind turns cross-off or onshore, and the energy readings are weak. It’s a dry patch, and not much to recommend.
Wednesday, July 22nd, we see a flicker of life in the afternoon with a 4 ft SW swell from 17 seconds, but the wind is onshore from the WSW and the energy is actually very strong at 1647. However, the onshore wind makes it a messy, lumpy option. Not worth a paddle.
Then we get a big spike for the end of the month. Friday, July 24th, is a proper standout, but it’s a long way out. The morning shows 7 ft of SW groundswell at 15 seconds, with a light offshore breeze from the E. The energy is very strong at 1765, and it’s clean. This is expert territory, no question. The swell is powerful.
Saturday, July 25th, looks even bigger in the morning, with 7 ft at 16 seconds, still offshore from the NE, and energy jumping to 2173. That’s a serious, powerful swell, and the conditions are pristine. Only for the very experienced.
Sunday, July 26th, the swell backs off to 5 ft, but it’s still clean in the morning with an offshore ENE breeze. Energy is 711, so it’s a good, solid day for the competent surfer.
After that, the swell fades out into the end of the 16 days, with small, clean waves that are more suited to a longboard or a quiet session.
The absolute best of the whole window is that Saturday, July 25th morning session. Big, clean, powerful swell at Castles, with light offshore winds. It’s a long way out, so keep an eye on it, but the potential is massive.
Rusty.
Short Range ForecastMostly dry. Very mild (max 18°C on Wed afternoon, min 13°C on Thu morning). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 21°C on Mon afternoon, min 13°C on Sat morning). Winds decreasing (fresh winds from the N on Sun morning, calm by Mon afternoon). | ||||||||||||||||||||
Wednesday 15 | Thursday 16 | Friday 17 | Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | |||||||||||||||
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) | SW 15 | SW 15 | SW 14 | SW 15 | SW 17 | SW 16 | SW 16 | SW 16 | SW 14 | SW 13 | SW 13 | SW 13 | SW 19 | SW 18 | SW 16 | SW 15 | SW 14 | SW 14 | SW 13 | SW 13 | SW 12 |
Wave Graph | |||||||||||||||||||||
1204 | 1011 | 813 | 836 | 1147 | 763 | 619 | 532 | 407 | 212 | 178 | 132 | 133 | 370 | 653 | 566 | 412 | 379 | 444 | 374 | 281 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-on | cross-off | cross | on | glassy |
High Tide | 1:19PM1.39m | 1:14AM0.68m | 1:39PM1.33m | 1:29AM0.76m | 1:54PM1.25m | 1:49AM0.83m | 2:05PM1.17m | 2:13AM0.89m | 2:16PM1.10m | 2:41AM0.91m | 2:26PM1.04m | 3:13AM0.90m | 2:35PM0.96m | ||||||||
Low Tide | 8:10PM0.22m | 6:44AM0.10m | 8:17PM0.25m | 7:10AM0.11m | 8:21PM0.24m | 7:34AM0.15m | 8:28PM0.21m | 7:58AM0.22m | 8:40PM0.17m | 8:22AM0.31m | 8:56PM0.16m | 8:45AM0.42m | 9:13PM0.18m | ||||||||
7:37 | — | — | 7:35 | — | — | 7:35 | — | — | 7:35 | — | — | 7:35 | — | — | 7:35 | — | — | 7:33 | — | — | |
— | 5:50 | — | — | 5:51 | — | — | 5:52 | — | — | 5:52 | — | — | 5:52 | — | — | 5:52 | — | — | 5:53 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 17 | 18 | 18 | 15 | 17 | 17 | 15 | 18 | 17 | 16 | 19 | 18 | 17 | 20 | 19 | 19 | 21 | 20 | 18 | 18 | 16 |
Feels °C | 13 | 14 | 14 | 9 | 12 | 12 | 9 | 12 | 11 | 10 | 13 | 13 | 10 | 16 | 15 | 13 | 17 | 15 | 14 | 15 | 14 |
Swell 1 Height (m) Direction Period (s) | SW 15 | SW 15 | SW 14 | SW 15 | SW 17 | SW 16 | SW 16 | SW 16 | SW 14 | SW 13 | SW 13 | SW 13 | SW 12 | SW 18 | SW 16 | SW 15 | SW 14 | SW 14 | SW 13 | SW 13 | SW 12 |
1204 | 1011 | 813 | 836 | 1147 | 763 | 619 | 532 | 407 | 212 | 178 | 132 | 69 | 370 | 653 | 566 | 412 | 379 | 444 | 374 | 281 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | SW 18 | — | — | — | NNW 4 | — | — | — | SW 21 | SW 19 | SW 13 | — | S 10 | NW 4 | S 10 | S 10 | S 9 | — |
— | — | — | 470 | — | — | — | 6 | — | — | — | 18 | 133 | 84 | — | 2 | 2 | 2 | 2 | 2 | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | SW 15 | S 10 | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | 55 | 8 | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | NNE 3 | — | NE 3 | N 3 | — | NNE 2 | N 3 | NNW 3 | NNE 3 | N 4 | NNW 4 | — | NNW 4 | — | — | — | SW 13 | — |
— | — | — | 4 | — | 2 | 5 | — | 1 | 5 | 2 | 2 | 13 | 5 | — | 10 | — | — | — | 44 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 1 | 0 | 1 | 1 | 1 | 402 | 178 | 1 | 402 | 1 | 1 | 178 | 501 | 0 |
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.










