Surf Forecasts:
Ranches surf forecast from 3 Sep 2026:
- Best quality surf: Thursday 3 Sep, 11AM (local time) - 4.5ft (1.3m), 7s period, NE swell with offshore winds.
- Most powerful swell: Tuesday 8 Sep, 2AM (local time) - 8ft (2.5m), 10s period, WSW swell with 1,424 kJ wave energy.
- Next surfable swell (1★+): Thursday 3 Sep, 11AM (local time) - 4.5ft (1.3m), 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 (Sep 03) at 11AM. The primary swell is predicted to be 1.3m 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 2.5m 10s and forecast to arrive on Tuesday (Sep 08) at 2AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 7.0m 15s period and expected on Monday (Sep 07) at 5PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11AM (Thu 3rd Sep) | 4.5ft (1.3m) 7s |
| Best Surf | 11AM (Thu 3rd Sep) | 4.5ft (1.3m) 7s |
| Most Powerful | 2AM (Tue 8th Sep) | 8ft (2.5m) 10s |
Table - best surf conditions forecast for Ranches over the next 16 days.
The Lowdown
Alright, Rusty here, breaking down the next couple of weeks for Ranches.
First thing, the water is 81°F, which is right around average for this time of year, so no surprises there.
The first week is a bit of a slog. We’ve got small, short-period NE windswell from Thursday the 3rd through the weekend. The energy is weak to moderate – the combined energy tops out at 147 (m). The wind is offshore, keeping things clean, but the waves are only 3 to 4 feet with a period of 6 to 7 seconds. It’s surfable, but nothing to get excited about. Sunday the 6th morning is cleaner with lighter wind, but the swell drops to 3 feet and the energy is down to 80 (m). After that, we get a messy mix of rain and gusty crosswinds from Monday the 7th through Wednesday the 9th. There’s a pulse of stronger energy on Tuesday the 8th morning with a 5 foot WnW swell and 491 (m) combined energy, but the wind is a messy cross-onshore, making it choppy and poor. Not worth it.
The real standout, and the only one I’m fired up about, is shaping up for Monday the 14th and Tuesday the 15th. This is two weeks out, so keep an eye on it, but the potential is huge. On Monday afternoon, we’ve got a glassy, clean peak with a tiny 2 foot swell, but the period is a massive 23 seconds from the SW, and the combined energy is a whopping 671 (m). That’s a serious groundswell with very long, powerful lines. It’s small in height, but the energy and length will make for some remarkably well-shaped, lined-up waves. The glassy conditions are a major bonus. This is for experts only, because the long period will make it look a lot bigger and more powerful than the height suggests. Tuesday the 15th morning still has some of that energy with a 3 foot SW swell, 21 second period, and energy at 1062 (m), but we get a light cross-onshore wind, so it’s not as clean as Monday afternoon.
So, if you’re a confident surfer, mark your calendar for Monday afternoon, September 14th. That’s your best bet for something truly special. The rest of the run into the 18th is more small, ordinary NE windswell with clean conditions on and off, but nothing to write home about.
This is Rusty, signing off.
Short Range ForecastMostly dry. Warm (max 28°C on Thu afternoon, min 25°C on Thu night). Mainly fresh winds. | Days 4-6 Weather SummaryModerate rain (total 13mm), heaviest on Sun night. Warm (max 30°C on Mon afternoon, min 24°C on Sun night). Winds decreasing (strong winds from the SE on Mon night, calm by Tue night). | ||||||||||||||||||||
Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | |||||||||||||||
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) | NE 7 | SSE 12 | NE 7 | NE 7 | NE 7 | NE 7 | NE 6 | NE 6 | NE 6 | NE 6 | N 10 | N 7 | NNW 15 | NE 8 | WSW 10 | W 7 | NW 8 | NW 7 | NW 10 | NNW 9 | NNW 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 167 | 0 | 97 | 128 | 140 | 97 | 80 | 93 | 80 | 91 | 8 | 10 | 21 | 98 | 1424 | 73 | 93 | 42 | 177 | 110 | 55 |
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 | cross-off | cross-off | cross | cross-on | cross | glassy | cross-on | off | off |
High Tide | 9:59AM0.59m | 8:17PM0.19m | 11:18AM0.62m | 10:55PM0.16m | 12:25PM0.66m | 00:38AM0.18m | 1:20PM0.69m | 1:41AM0.23m | 2:07PM0.70m | 2:29AM0.29m | 2:48PM0.69m | 3:11AM0.36m | 3:25PM0.66m | 3:52AM0.42m | |||||||
Low Tide | 6:40PM0.22m | 2:42AM0.08m | 7:48PM0.17m | 4:04AM0.09m | 8:21PM0.13m | 5:29AM0.08m | 8:49PM0.10m | 6:43AM0.07m | 9:15PM0.08m | 7:44AM0.06m | 9:40PM0.06m | 8:39AM0.06m | 10:04PM0.05m | ||||||||
 |  |  | | |  | | | | |  |  | | |  | | | | | | | |
 | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:18 | — | — | 6:18 | — | — |
 | — | 6:46 | — | — | 6:45 | — | — | 6:45 | — | — | 6:44 | — | — | 6:43 | — | — | 6:42 | — | — | 6:40 | — |
mm | — | — | — | — | — | — | — | — | — | — | 1 | 4 | — | — | 6 | 1 | 1 | — | — | 1 | — |
Temp °C | 27 | 28 | 26 | 27 | 27 | 26 | 28 | 28 | 26 | 28 | 28 | 26 | 29 | 30 | 27 | 27 | 28 | 28 | 28 | 28 | 26 |
Feels °C | 26 | 27 | 24 | 25 | 25 | 25 | 28 | 26 | 26 | 30 | 29 | 29 | 30 | 28 | 23 | 27 | 30 | 31 | 31 | 30 | 26 |
Swell 1 Height (m) Direction Period (s) | S 14 | SSE 12 | SSE 12 | S 12 | S 12 | S 11 | S 12 | S 12 | S 12 | SSW 12 | SSW 13 | SSW 14 | SSW 15 | NE 8 | WSW 10 | S 9 | SSW 8 | S 8 | NW 10 | NNW 9 | SSW 13 |
| kJ | 268 | 241 | 199 | 530 | 497 | 238 | 625 | 638 | 884 | 1197 | 1609 | 2349 | 4902 | 98 | 1424 | 452 | 252 | 140 | 177 | 110 | 178 |
Swell 2 Height (m) Direction Period (s) | SE 13 | S 14 | S 13 | E 14 | E 14 | S 13 | SSW 17 | SSW 17 | SSW 16 | E 13 | N 10 | N 7 | NNW 15 | E 13 | SSW 15 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 13 | NNW 9 |
| kJ | 167 | 195 | 130 | 33 | 35 | 202 | 117 | 119 | 151 | 50 | 8 | 10 | 21 | 119 | 402 | 481 | 456 | 356 | 273 | 257 | 55 |
Swell 3 Height (m) Direction Period (s) | S 10 | S 10 | E 14 | SW 18 | SW 13 | E 14 | E 14 | E 14 | E 13 | N 8 | N 10 | NW 16 | — | NNW 13 | ENE 12 | W 7 | NW 8 | NW 7 | S 8 | S 8 | S 8 |
| kJ | 18 | 8 | 16 | 12 | 27 | 64 | 59 | 58 | 88 | 10 | 8 | 10 | — | 17 | 233 | 73 | 93 | 42 | 58 | 43 | 29 |
Wind waves Height (m) Direction Period (s) | NE 7 | ENE 7 | NE 7 | NE 7 | NE 7 | NE 7 | NE 6 | NE 6 | NE 6 | NE 6 | ENE 7 | ENE 7 | ENE 7 | SSW 15 | SSW 10 | — | — | — | NE 8 | NE 8 | NE 7 |
| kJ | 167 | 150 | 97 | 128 | 140 | 97 | 80 | 93 | 80 | 91 | 116 | 125 | 183 | 21754 | 1618 | — | — | — | 65 | 84 | 122 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 154 | 0 | 0 | 154 | 0 | 0 | 156 | 0 | 0 | 6 | 8 | 171 | 171 | 199 | 38 | 9 | 0 | 6 | 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.
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