Surf Forecasts:
Ranches surf forecast from 27 Aug 2026:
- Best quality surf: Monday 31 Aug, 8PM (local time) - 4ft (1.2m), 8s period, NE swell with offshore winds.
- Most powerful swell: Monday 31 Aug, 2PM (local time) - 4.5ft (1.3m), 8s period, NE swell with 193 kJ wave energy.
- Next surfable swell (1★+): Thursday 27 Aug, 8PM (local time) - 2.5ft (0.8m), 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 Thursday (Aug 27) at 8PM. The primary swell is predicted to be 0.8m 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 1.3m 8s and forecast to arrive on Monday (Aug 31) at 2PM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 9s period and expected on Tuesday (Sep 01) at 11AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8PM (Thu 27th Aug) | 2.5ft (0.8m) 7s |
| Best Surf | 8PM (Mon 31st Aug) | 4ft (1.2m) 8s |
| Most Powerful | 2PM (Mon 31st Aug) | 4.5ft (1.3m) 8s |
Table - best surf conditions forecast for Ranches over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s look at the only show in town for this stretch: Ranches.
This is a solid reef break for advanced surfers, exposed to the north-west, and it’s fairly consistent. Over the next sixteen days, it starts off very quiet. From now through the end of August and the first week of September, the swell is small and pretty average. We’re looking at knee-to-waist high waves mostly from the north-east, with periods around 6-8 seconds – not much grunt in them. The combined energy is weak to moderate (13 to 151), so don’t expect any real power. The wind is offshore a lot of the time, which keeps things clean, but the surf itself is just ordinary.
The first real standout arrives on Monday the 7th of September. We get a south-west change in wind, and the swell flicks around to the north-northwest with a period jumping to 12-13 seconds. The combined energy climbs to 257 – that’s solid moderate to strong wave energy. It’s still only around 3 ft, but that longer period groundswell carries a lot more punch. The wind on that Monday morning is a light cross-onshore, and by the afternoon it’s just a light cross-shore breeze.
But the true highlight of the whole forecast is Tuesday the 8th of September. Swell direction holds steady from the north-west, but the period stretches out to a very long 14 seconds, a proper groundswell. The combined energy jumps to 378 – that’s strong. Heads up, though: with such a long period on a reef, sets will be clean but may come a bit inconsistent. The wind is the clincher: light offshore in the morning and then glassy light north-easterly in the afternoon. This is going to be clean, lined-up, quality surf at 3 ft. For an advanced crew, this is the session to circle. There could be a few people out – crowds are sometimes a thing here – but on a Tuesday, you might luck out.
After that, the swell drops back through Wednesday and Thursday, getting smaller and switching to a poor onshore direction, so the quality fades fast. The last few days (10th and 11th of September) see the swell drop to tiny knee-high leftovers.
Overall, the first two weeks are a bit of a write-off. The one clear winner is the window around Monday 7th and Tuesday 8th of September. Get on it if you can.
- Rusty
Short Range ForecastMostly dry. Warm (max 28°C on Fri afternoon, min 25°C on Thu night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 29°C on Sun afternoon, min 25°C on Sun night). Wind will be generally light. | ||||||||||||||||||||
Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | |||||||||||||||
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) | NW 9 | NW 9 | NNE 7 | NE 6 | S 14 | NE 6 | NE 6 | S 13 | W 12 | NE 7 | NE 7 | NE 7 | NE 7 | NE 8 | NE 8 | NE 8 | NE 8 | NE 8 | NE 8 | NE 7 | NE 7 |
Wave Graph | |||||||||||||||||||||
13 | 13 | 10 | 45 | 0 | 56 | 73 | 0 | 11 | 97 | 105 | 89 | 143 | 177 | 151 | 167 | 187 | 145 | 164 | 121 | 77 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | off | off | off | off | off | off | off | off | off | off | off | off | off | off | off | cross-off | off | off |
High Tide | 4:13PM0.63m | 4:28AM0.38m | 4:40PM0.59m | 5:07AM0.43m | 5:09PM0.54m | 5:50AM0.47m | 5:38PM0.48m | 6:38AM0.50m | 6:08PM0.41m | 7:34AM0.53m | 6:40PM0.33m | 8:41AM0.56m | 7:14PM0.25m | ||||||||
Low Tide | 9:23AM0.06m | 10:50PM0.08m | 10:04AM0.07m | 11:12PM0.07m | 10:49AM0.10m | 11:35PM0.05m | 11:40AM0.14m | 00:00AM0.05m | 12:40PM0.19m | 00:28AM0.05m | 1:58PM0.23m | 1:01AM0.05m | 3:56PM0.25m | 1:43AM0.06m | |||||||
6:13 | — | — | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — | 6:16 | — | — | 6:16 | — | — | |
— | 6:52 | — | — | 6:52 | — | — | 6:52 | — | — | 6:51 | — | — | 6:50 | — | — | 6:49 | — | — | 6:47 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — |
Temp °C | 27 | 27 | 25 | 27 | 28 | 26 | 27 | 27 | 25 | 28 | 29 | 26 | 27 | 28 | 26 | 28 | 29 | 27 | 29 | 29 | 27 |
Feels °C | 26 | 25 | 24 | 26 | 26 | 26 | 26 | 25 | 25 | 28 | 27 | 27 | 27 | 28 | 25 | 28 | 28 | 29 | 31 | 31 | 28 |
Swell 1 Height (m) Direction Period (s) | S 17 | S 17 | S 16 | S 14 | S 14 | S 14 | S 13 | S 13 | S 12 | NE 7 | S 12 | SSW 15 | SSW 15 | SSW 14 | NE 8 | NE 8 | S 18 | NE 8 | NE 8 | S 16 | NE 7 |
710 | 540 | 582 | 334 | 324 | 229 | 219 | 215 | 103 | 97 | 100 | 199 | 191 | 180 | 151 | 167 | 311 | 145 | 164 | 322 | 77 | |
Swell 2 Height (m) Direction Period (s) | S 12 | S 12 | NNE 7 | SSW 11 | SSW 19 | SW 19 | SW 18 | SSW 17 | SSW 17 | S 12 | SSW 16 | S 11 | S 11 | S 11 | S 19 | SSW 18 | S 12 | S 17 | S 16 | S 10 | S 15 |
71 | 72 | 10 | 39 | 35 | 91 | 80 | 115 | 186 | 100 | 162 | 87 | 85 | 82 | 192 | 329 | 75 | 368 | 422 | 53 | 275 | |
Swell 3 Height (m) Direction Period (s) | NW 9 | NW 9 | SE 6 | WNW 8 | ESE 6 | SSW 10 | W 11 | E 13 | W 12 | SSW 16 | W 11 | SSW 20 | SSW 18 | SSW 19 | S 10 | S 14 | SW 14 | SSW 14 | S 12 | SW 13 | SSE 11 |
13 | 13 | 11 | 7 | 3 | 18 | 9 | 13 | 11 | 171 | 9 | 38 | 31 | 123 | 53 | 192 | 53 | 111 | 41 | 27 | 39 | |
Wind waves Height (m) Direction Period (s) | NE 5 | NE 6 | NE 5 | NE 6 | NE 5 | NE 6 | NE 6 | NE 6 | NE 7 | E 7 | NE 7 | NE 7 | NE 7 | NE 8 | ENE 8 | ENE 9 | NE 8 | ENE 8 | ENE 8 | NE 7 | E 8 |
27 | 42 | 19 | 45 | 49 | 56 | 73 | 88 | 100 | 135 | 105 | 89 | 143 | 177 | 192 | 268 | 187 | 207 | 181 | 121 | 230 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 2 | 2 | 2 | 0 | 154 | 0 | 0 | 6 | 6 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in Oahu | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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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.











