Surf Forecasts:
Ranches surf forecast from 10 Sep 2026:
- Best quality surf: Tuesday 15 Sep, 8PM (local time) - 3ft (0.9m), 19s period, SW swell with glassy winds.
- Most powerful swell: Tuesday 15 Sep, 8PM (local time) - 3ft (0.9m), 19s period, SW swell with 546 kJ wave energy.
- Next surfable swell (1★+): Wednesday 9 Sep, 11PM (local time) - 3.5ft (1.0m), 9s period with NW 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 Wednesday (Sep 09) at 11PM. The primary swell is predicted to be 1.0m and 9s 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 0.9m 19s and forecast to arrive on Tuesday (Sep 15) at 8PM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 13s period and expected on Wednesday (Sep 09) at 11PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Wed 9th Sep) | 3.5ft (1.0m) 9s |
| Best Surf | 8PM (Tue 15th Sep) | 3ft (0.9m) 19s |
| Most Powerful | 8PM (Tue 15th Sep) | 3ft (0.9m) 19s |
Table - best surf conditions forecast for Ranches over the next 16 days.
The Lowdown
Alright mates, Rusty here checking in on the waves at Ranches.
Right off the bat, it’s a slow start with not much to get excited about for a few days. Water temp is a balmy 81°, about what you’d expect for early September, so it’s comfortable out there.
Your first chance for a paddle comes Thursday morning the 11th – small 2-foot waves from the NE with a short 8-second interval (82). The wind is dead glassy, so it’ll be clean but very weak. Thursday afternoon stays small at 2ft, still pretty ordinary.
Friday the 12th and Saturday the 13th? Onshore muck. Don’t bother.
Now, here’s the first real highlight: Monday the 14th afternoon. The wind goes strong offshore from the NE at 25 km/h, and we get a tiny 2ft wave but with a monster 22-second period and combined energy of 313. That’s a long-period groundswell that’ll make the most of the reef. It’s an expert-level window due to the power, but the lines will be clean as can be.
The absolute standout session is Thursday the 17th. Morning brings a 3ft SW groundswell with a 16-second period and combined energy of 417 – that’s solid power. Offshore wind from the ENE at 15 km/h will groom it perfectly. Afternoon stays just as good with a bit more wind (20 km/h) and a reading of 367. This is your best bet for the whole 16 days.
Saturday the 19th morning is another good call – a 3ft SW swell at 15 seconds (374) with a light offshore. The afternoon fades into nothing, so get it early.
From the 20th onwards it goes flat and messy. Onshore winds, tiny bumps, thunderstorms even. A few pulses of SW groundswell show up but the wind is straight onshore, so there’s nothing worth paddling out for.
Keep your eyes on Monday afternoon the 14th for the magic period, and absolutely lock in Thursday the 17th for the best size and quality. That’s your call to action.
Rusty.
Short Range ForecastMostly dry. Warm (max 29°C on Thu afternoon, min 24°C on Thu night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 28°C on Mon afternoon, min 24°C on Sat night). Wind will be generally light. | |||||||||||||||||||
Wed 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | ||||||||||||||
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 10 | NW 8 | SSW 16 | SSW 18 | NE 7 | NE 8 | NE 8 | NE 7 | NE 8 | SW 16 | NE 9 | SW 15 | NE 8 | NE 9 | NE 8 | SW 22 | SW 21 | NNE 8 | NNE 8 | SW 19 |
Wave Graph  | ||||||||||||||||||||
 kJ | 257 | 97 | 0 | 0 | 47 | 53 | 57 | 44 | 50 | 124 | 77 | 107 | 74 | 88 | 70 | 227 | 224 | 39 | 37 | 535 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | off | glassy | off | off | glassy | cross-off | off | on | on | off | on | on | off | off | off | off | cross-on | cross-on | off |
High Tide | 3:25PM0.66m | 3:52AM0.42m | 3:59PM0.61m | 4:31AM0.47m | 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 | |||||||
Low Tide | 10:04PM0.05m | 9:30AM0.07m | 10:28PM0.04m | 10:20AM0.10m | 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 | |||||||
 |  | | | |  | | | | | | | | | | | | | | | |
 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — |
 | 6:40 | — | — | 6:39 | — | — | 6:39 | — | — | 6:38 | — | — | 6:37 | — | — | 6:37 | — | — | 6:36 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 28 | 28 | 28 | 29 | 26 | 27 | 27 | 26 | 26 | 26 | 26 | 26 | 26 | 25 | 27 | 28 | 26 | 27 | 27 | 27 |
Feels °C | 30 | 30 | 32 | 33 | 26 | 29 | 28 | 25 | 28 | 26 | 28 | 27 | 26 | 26 | 27 | 28 | 27 | 30 | 30 | 32 |
Swell 1 Height (m) Direction Period (s) | NW 10 | NW 8 | NE 7 | NE 7 | SW 16 | SW 16 | SW 15 | SSW 15 | SW 16 | NE 9 | NE 9 | NE 8 | NE 8 | NE 9 | NE 8 | SW 22 | NE 8 | SSW 20 | SW 19 | SW 19 |
| kJ | 257 | 97 | 56 | 53 | 268 | 258 | 229 | 283 | 245 | 79 | 77 | 74 | 74 | 88 | 70 | 227 | 65 | 490 | 384 | 535 |
Swell 2 Height (m) Direction Period (s) | SSW 13 | SSW 13 | SSW 13 | SSW 12 | NE 7 | NE 8 | SSW 12 | NE 7 | NE 8 | SW 16 | SSW 13 | SW 15 | SSW 15 | SSW 14 | SSW 14 | SW 14 | SW 21 | NNE 8 | NNE 8 | NE 7 |
| kJ | 257 | 176 | 173 | 136 | 47 | 53 | 46 | 44 | 50 | 124 | 116 | 107 | 84 | 134 | 76 | 48 | 224 | 39 | 37 | 44 |
Swell 3 Height (m) Direction Period (s) | SSW 7 | NE 8 | SSW 16 | SSW 18 | S 12 | SW 9 | SW 9 | SW 8 | SW 8 | SW 13 | SSW 16 | SSW 12 | SW 12 | SW 24 | SSW 11 | SSW 11 | SSW 13 | SW 13 | SW 12 | SW 12 |
| kJ | 43 | 36 | 181 | 211 | 72 | 29 | 28 | 18 | 11 | 87 | 98 | 57 | 37 | 87 | 12 | 12 | 68 | 41 | 38 | 37 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | ENE 7 | ENE 7 | NE 8 | — | — | — | — | — | E 4 | E 5 | E 6 | NNE 8 | — | — | — | — |
| kJ | — | — | — | — | 82 | 62 | 57 | — | — | — | — | — | 6 | 17 | 22 | 86 | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 2 | 0 | 2 | 2 | 0 | 0 | 0 | 0 | 3 | 9 | 0 | 3 | 3 | 0 | 0 | 0 | 0 | 3 | 6 | 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.
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