Surf Forecasts:
Ranches surf forecast from 15 Aug 2026:
- Best quality surf: Thursday 20 Aug, 11AM (local time) - 2ft (0.6m), 18s period, SW swell with glassy winds.
- Most powerful swell: Saturday 15 Aug, 8PM (local time) - 8ft (2.4m), 7s period, NE swell with 606 kJ wave energy.
- Next surfable swell (1★+): Sunday 16 Aug, 11PM (local time) - 3.5ft (1.1m), 8s 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 Sunday (Aug 16) at 11PM. The primary swell is predicted to be 1.1m and 8s period. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Ranches in the next 16 days are 2.4m 7s and forecast to arrive on Saturday (Aug 15) at 8PM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.0m 7s period and expected on Sunday (Aug 16) at 2AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Sun 16th Aug) | 3.5ft (1.1m) 8s |
| Best Surf | 11AM (Thu 20th Aug) | 2ft (0.6m) 18s |
| Most Powerful | 8PM (Sat 15th Aug) | 8ft (2.4m) 7s |
Table - best surf conditions forecast for Ranches over the next 16 days.
The Lowdown
G’day. Rusty here.
We’re looking at a surf outlook that starts out rough and then slowly finds its feet. The first few days are a write-off. For the weekend of the 15th and into Monday the 17th, the conditions at Ranches are plain ugly. A lumpy 7ft NE windswell on Saturday with a short 7-second period is getting blown apart by a fresh 22 mph offshore, creating poor, choppy surf. That drop-off to a tiny 1.0ft on the arvo is just the final nail in the coffin. The water temp here is about average for the time of year, so at least that's neutral.
It's not much better Sunday or Monday. We’re looking at small 4ft and 3ft waves with short periods, mostly cross-offshore winds, and only marginal or ordinary conditions. This stretch is a total dud. It isn't until late in the week that things start to look up.
The first sign of life comes on Thursday the 20th. The morning session at Ranches is the standout. A clean 2ft groundswell from the SW, but crucially it's packing a very long 18-second period. The energy level is sitting at a moderate 285. The wind goes glassy with a slight air, and it's all pointing to clean, glassy conditions. The long period will mean the swell holds shape well, with those long gaps between sets making paddling out easy. This is the window for the patient surfer.
Things settle back into a more consistent, but small, pattern after that. From Friday the 21st through to the end of the month, the swell drops and stays small, running between 2ft and 4ft from the NE. The periods are short, mostly around 6-7 seconds, which means weak, windswell waves. The wind is often offshore or clean, so the conditions will be tidy, but the wave quality will feel ordinary. The energy is low, mostly under 100, so don't expect any punch.
Looking forward to Sunday the 30th, there's a glimmer of a more promising setup. The morning shows a 4ft NE swell with a 7-second period and energy climbing to 205. The wind is a gentle 9 mph cross-offshore, which should keep the surface clean. It's still not a big or powerful swell, but it's the most consistent option on the tail end of the forecast. For a spot like Ranches, which is a reef that handles a NW swell direction best, this NE windswell isn't ideal, but clean conditions will make it the most surfable option of the whole run after the first week.
In short, the first week is a total loss. The second week is for the low-expectation surfer. The one real standout is that Thursday the 20th morning glass-off on the long period groundswell. That's your best bet. After that, it's just small, clean, but ordinary waves right through to the end.
Rusty.
Short Range ForecastHeavy rain (total 31mm), heaviest during Sat night. Warm (max 28°C on Sun afternoon, min 25°C on Fri night). Winds decreasing (near gales from the ENE on Sat night, light winds from the E by Mon afternoon). | Days 5-7 Weather SummaryMostly dry. Warm (max 28°C on Tue afternoon, min 24°C on Mon night). Wind will be generally light. | ||||||||||||||||||
Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | ||||||||||||||
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 6 | NE 7 | W 13 | WNW 13 | NE 8 | NE 8 | NE 8 | NE 7 | NE 6 | NE 6 | SW 7 | SW 6 | S 13 | SW 16 | NE 6 | NNE 6 | SW 18 | NE 7 | NE 7 |
Wave Graph | |||||||||||||||||||
150 | 363 | 30 | 33 | 239 | 165 | 94 | 86 | 49 | 47 | 11 | 11 | 0 | 129 | 33 | 26 | 249 | 36 | 45 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | off | cross-off | cross-off | cross-off | cross-off | off | off | glassy | cross-off | off | glassy | cross-off | off | glassy | cross-off | off |
High Tide | 6:26AM0.41m | 6:14PM0.50m | 7:17AM0.44m | 6:44PM0.42m | 8:14AM0.46m | 7:12PM0.34m | 9:19AM0.48m | 7:36PM0.27m | 10:33AM0.50m | 11:45AM0.53m | 10:31PM0.18m | ||||||||
Low Tide | 00:21AM0.04m | 12:01PM0.14m | 00:48AM0.05m | 1:01PM0.20m | 1:16AM0.06m | 2:17PM0.25m | 1:45AM0.08m | 4:14PM0.27m | 2:19AM0.10m | 3:05AM0.12m | 8:45PM0.20m | ||||||||
— | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | |
7:04 | — | 7:02 | — | — | 7:01 | — | — | 7:00 | — | — | 7:00 | — | — | 7:00 | — | — | 6:59 | — | |
mm | — | — | — | 11 | 14 | 5 | 1 | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 27 | 27 | 26 | 27 | 28 | 27 | 27 | 28 | 26 | 27 | 28 | 26 | 26 | 27 | 26 | 27 | 27 | 26 |
Feels °C | 26 | 25 | 24 | 22 | 26 | 29 | 29 | 30 | 31 | 28 | 29 | 29 | 27 | 29 | 29 | 26 | 30 | 30 | 27 |
Swell 1 Height (m) Direction Period (s) | S 14 | S 13 | S 13 | S 13 | SSE 10 | SSE 8 | S 7 | S 14 | S 14 | S 13 | S 13 | S 13 | S 13 | NE 7 | NE 6 | NNE 6 | SW 18 | NE 7 | SW 16 |
311 | 222 | 171 | 176 | 553 | 322 | 124 | 338 | 329 | 225 | 215 | 166 | 114 | 36 | 33 | 26 | 249 | 36 | 278 | |
Swell 2 Height (m) Direction Period (s) | ESE 11 | W 11 | W 13 | S 18 | NE 8 | NE 8 | NE 8 | S 6 | NE 6 | S 5 | SSW 17 | SSW 18 | SSE 7 | SW 16 | S 12 | SSW 16 | NE 7 | SSW 17 | NE 7 |
66 | 22 | 30 | 99 | 239 | 165 | 94 | 65 | 49 | 9 | 115 | 123 | 16 | 129 | 69 | 175 | 36 | 200 | 45 | |
Swell 3 Height (m) Direction Period (s) | NNW 8 | NNW 8 | NNW 8 | WNW 13 | S 12 | S 10 | S 14 | WNW 11 | S 6 | WNW 11 | SW 7 | SW 6 | SW 18 | S 12 | SSW 16 | S 12 | S 11 | S 11 | SSE 11 |
12 | 6 | 12 | 33 | 151 | 73 | 187 | 25 | 35 | 24 | 11 | 11 | 79 | 44 | 100 | 45 | 39 | 40 | 40 | |
Wind waves Height (m) Direction Period (s) | NE 6 | NE 7 | ENE 7 | ENE 7 | SE 9 | SE 8 | SSE 7 | NE 7 | E 7 | NE 6 | NE 6 | NE 6 | NE 5 | — | — | — | — | E 8 | — |
150 | 363 | 444 | 853 | 1748 | 1000 | 178 | 86 | 134 | 47 | 26 | 26 | 22 | — | — | — | — | 72 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 153 | 154 | 154 | 162 | 16 | 16 | 0 | 0 | 0 | 0 | 2 | 2 | 2 | 0 | 2 | 2 | 0 | 2 | 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.











