
Surf Forecasts:
Ranches surf forecast from 12 Sep 2026:
- Best quality surf: Tuesday 15 Sep, 11PM (local time) - 3ft (0.9m), 19s period, SW swell with offshore winds.
- Most powerful swell: Tuesday 15 Sep, 11PM (local time) - 3ft (0.9m), 19s period, SW swell with 546 kJ wave energy.
- Next surfable swell (1★+): Friday 11 Sep, 8PM (local time) - 2ft (0.6m), 7s period with NE swell.
Best Forecast Surf Conditions for Ranches this week:
The surf forecast for Ranches over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Sep 11) at 8PM. The primary swell is predicted to be 0.6m and 7s period. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Ranches in the next 16 days are 0.9m 19s and forecast to arrive on Tuesday (Sep 15) at 11PM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 7s period and expected on Thursday (Sep 17) at 8AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8PM (Fri 11th Sep) | 2ft (0.6m) 7s |
| Best Surf | 11PM (Tue 15th Sep) | 3ft (0.9m) 19s |
| Most Powerful | 11PM (Tue 15th Sep) | 3ft (0.9m) 19s |
Table - best surf conditions forecast for Ranches over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s suss out what’s coming down the line for the Ranches (SW Australia) over the next couple of weeks.
First off, let’s talk conditions. The water temp is sitting right on 81°, which is bang on average for this time of year, so no surprises there. For a spot that’s an exposed reef break, we need the direction to line up right, and for the most part, it’s a bit of a slow burn.
We kick off the forecast with Friday afternoon, the 11th. We’ve got a tiny 2ft NE groundswell with a short 8-second period, but what makes it ridable is the clean cross-off breeze from the NE. The combined energy is weak (45), so it’s not pumping, but it’s a surfable wave.
Saturday morning, the 12th, sees the wind swing onshore from the W, and the swell shifts to a small, weak NNE pulse. It’s a no-go. Saturday afternoon brings a big jump in period to 16 seconds from the SW, giving us moderate energy (292), but again, onshore wind spoils the party. Sunday is a write-off with poor conditions.
We get a bit of a window Monday morning the 14th. Clean offshore winds from the NE, a tiny 2ft NE swell. It’s not big, but it’s clean. Monday afternoon sees a very long-period 22-second SW groundswell roll in with moderate energy (296), but it’s coming from the wrong direction for this reef, and the wind is a cross-off from the NNE. It’s a tricky one.
Tuesday the 15th offers clean, small surf again with offshore NE winds and a 2ft NNE swell (55 energy). Small but fun for a log or a foamy. Wednesday and Thursday the 16th and 17th build a little: we see 3ft to 4ft NE swell, but the period drops to a weak 7 seconds (short-period windswell), but we’ve got moderate offshore winds from the NE keeping it clean. The energy creeps into the moderate range (134, 132, 115). It’s ordinary, but there are waves.
Then we hit a big dead patch. From Friday the 18th all the way through most of Tuesday the 22nd, it’s mostly flat or tiny, disorganised stuff with no energy. A few glassy moments on the weekend, but nothing to surf.
Finally, things wake up. Wednesday afternoon the 23rd looks interesting. A 2ft SW groundswell with a long 16-second period, moderate offshore ENE wind, and combined energy hitting 206 – that’s moderate and punchy. The guidance gives this a good call. This is a standout moment for the first week.
The real winner, though, looks to be Thursday afternoon the 24th. The swell holds at 3ft from the SW, still with a solid 14-second period, but the combined energy jumps to 288. The wind is offshore from the NE (moderate breeze) and the guidance is shouting “good surf conditions.” This is the best-bet window for a clean, fun session at the reef.
Be warned, there’s a big pulse pushing through on Friday the 25th and Saturday the 26th (over a week away, so treat it as promising but not locked in). Swell heights hit 5ft to 6ft from the NNW with very long periods of 14-15 seconds and combined energy in the very strong range (1185, 1226, 1042). That is a lot of water moving. But the wind is cross-on or onshore for most of it, and with that kind of period at a beach/reef setup, it’ll be heavy, lined-up, and likely too challenging for the average punter – definitely expert territory. For now, keep your eye on Thursday the 24th.
Stay tuned, the ocean’s waking up.
- Rusty
Short Range ForecastMostly dry. Warm (max 28°C on Fri afternoon, min 24°C on Fri night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 29°C on Tue afternoon, min 24°C on Mon night). Wind will be generally light. | |||||||||||||||||||
Fri 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | ||||||||||||||
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) | NE 8 | NE 7 | NNE 8 | SW 16 | NE 9 | SW 15 | NE 9 | NE 9 | NE 8 | SW 22 | SW 21 | NNE 8 | NE 8 | SW 19 | NE 7 | NE 7 | NE 7 | NE 7 | NE 7 | NE 6 |
Wave Graph | ||||||||||||||||||||
45 | 44 | 46 | 124 | 79 | 107 | 75 | 88 | 70 | 227 | 224 | 55 | 60 | 535 | 69 | 91 | 91 | 132 | 115 | 70 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | off | on | on | glassy | on | on | off | off | cross-off | off | off | off | off | off | off | off | off | off | off |
High Tide | 4:32PM0.54m | 5:11AM0.51m | 5:02PM0.47m | 5:51AM0.54m | 5:31PM0.40m | 6:34AM0.55m | 6:00PM0.33m | 7:22AM0.55m | 6:27PM0.27m | 8:19AM0.54m | 6:52PM0.22m | 9:30AM0.53m | 7:45PM0.18m | |||||||
Low Tide | 10:51PM0.04m | 11:10AM0.13m | 11:14PM0.05m | 12:03PM0.17m | 11:37PM0.06m | 1:03PM0.20m | 00:00AM0.08m | 2:21PM0.23m | 00:25AM0.11m | 4:24PM0.24m | 00:56AM0.13m | 7:32PM0.21m | 1:44AM0.16m | |||||||
— | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | 6:20 | — | — | 6:20 | — | — | |
6:39 | — | — | 6:38 | — | — | 6:37 | — | — | 6:37 | — | — | 6:36 | — | — | 6:35 | — | — | 6:34 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 28 | 27 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 27 | 25 | 27 | 29 | 27 | 28 | 29 | 26 | 28 | 29 | 26 |
Feels °C | 30 | 29 | 28 | 28 | 27 | 28 | 27 | 27 | 28 | 29 | 24 | 30 | 32 | 29 | 29 | 29 | 26 | 28 | 28 | 27 |
Swell 1 Height (m) Direction Period (s) | SW 15 | SSW 15 | SW 16 | NE 9 | NE 9 | NE 9 | NE 9 | NE 9 | NE 8 | NE 8 | NNE 8 | SSW 20 | SW 19 | SW 19 | SSW 18 | SSW 18 | SSW 17 | SSW 16 | SSW 16 | SSW 18 |
229 | 283 | 245 | 81 | 79 | 79 | 75 | 88 | 70 | 69 | 44 | 490 | 384 | 535 | 541 | 541 | 510 | 322 | 322 | 768 | |
Swell 2 Height (m) Direction Period (s) | NE 8 | NE 7 | NNE 8 | SW 16 | SSW 13 | SW 15 | SSW 15 | SSW 14 | SSW 14 | SW 22 | SW 21 | NNE 8 | NE 8 | NE 7 | SW 12 | SW 11 | SSW 11 | SSW 20 | SSW 19 | E 10 |
45 | 44 | 46 | 124 | 116 | 107 | 84 | 134 | 76 | 227 | 224 | 55 | 60 | 64 | 34 | 43 | 12 | 216 | 210 | 51 | |
Swell 3 Height (m) Direction Period (s) | SSW 12 | SW 8 | SSE 8 | SW 13 | SSW 16 | SW 12 | SW 12 | SW 24 | SSW 24 | SW 14 | SSW 13 | SW 13 | SW 12 | SW 12 | SSE 6 | E 11 | SSW 21 | E 10 | E 10 | SSE 10 |
46 | 18 | 12 | 87 | 98 | 37 | 37 | 87 | 54 | 48 | 68 | 41 | 38 | 37 | 4 | 9 | 42 | 8 | 19 | 9 | |
Wind waves Height (m) Direction Period (s) | ENE 11 | — | — | — | — | ENE 9 | E 9 | E 4 | E 4 | E 5 | E 5 | — | — | ENE 6 | NE 7 | NE 7 | NE 7 | NE 7 | NE 7 | NE 6 |
249 | — | — | — | — | 64 | 56 | 13 | 15 | 21 | 17 | — | — | 51 | 69 | 91 | 91 | 132 | 115 | 70 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 0 | 0 | 2 | 5 | 0 | 2 | 3 | 0 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in Oahu | ||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||
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Information about the Ranches Surf forecast
The above surf forecast table for Ranches provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Ranches can be found by selecting the local surf guide option on the grey menu. Our Ranches 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 (Ranches) 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 Ranches 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.
Ranches is 22 km (14 miles) from Wahiawa. If you plan a vacation in Oahu, look for hotels and other accommodation in Wahiawa. Wahiawa has rooms for a wide range of budgets as well as car hire and transport links.










