
Surf Forecasts:
Ranches surf forecast from 4 Sep 2026:
- Best quality surf: Monday 7 Sep, 8AM (local time) - 8ft (2.5m), 14s period, SW swell with cross-offshore winds.
- Most powerful swell: Monday 7 Sep, 8PM (local time) - 15ft (4.5m), 14s period, SW swell with 7,495 kJ wave energy.
- Next surfable swell (1★+): Friday 4 Sep, 11AM (local time) - 3.5ft (1.1m), 6s 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 04) at 11AM. The primary swell is predicted to be 1.1m and 6s 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 4.5m 14s and forecast to arrive on Monday (Sep 07) at 8PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.5m 8s period and expected on Monday (Sep 07) at 5PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11AM (Fri 4th Sep) | 3.5ft (1.1m) 6s |
| Best Surf | 8AM (Mon 7th Sep) | 8ft (2.5m) 14s |
| Most Powerful | 8PM (Mon 7th Sep) | 15ft (4.5m) 14s |
Table - best surf conditions forecast for Ranches over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s talk about what’s on the cards for Ranches.
Right off the bat, I gotta tell you, there’s no real standout surf to get excited about here for a while. The first recommendation kicks off on Friday, September 4th, but it’s a pretty low-energy start. We’ve got a NE wind blowing at 16 mph, keeping it clean, but the swell is small and weak. We’re looking at a middling 4 ft NE swell with a short, weak period of 7 seconds. The combined energy is only 103 (weak), so it’s not going to have much push. The water temp is a warm 81°, which is pretty much average for this time of year.
Saturday the 5th and Sunday the 6th look similar, with small, weak NE swell and clean winds. The waves are surfable, but very ordinary. Sunday afternoon sees the swell drop right off. We then hit a dry spell from Monday the 7th through to Wednesday the 9th, with poor conditions and onshore or cross-shore winds. Not worth paddling out for.
The next real glimpse of something different comes on Friday, September 11th. The morning shows a long-period 16-second SW groundswell, but it’s only 2 ft. The energy is actually moderate at 285 (moderate), and the wind is a gentle offshore from the ENE. Still, the size is tiny, so it’s more of a promise than a party.
The middle of the month is nothing special, just more of the same ordinary NE windswell. But then we get to the second week, and a couple of windows pop up. Tuesday, September 15th, the afternoon brings a massive SW groundswell at 20 seconds and 3 ft, with a combined energy of 777 (very strong). That’s a proper groundswell, but it’s a tricky one. With that long period, it might break a bit too straight for a beach break, but at a reef like Ranches, it could line up nicely. The wind is a cross-offshore, so it should be clean.
Then Wednesday, September 16th, is worth a mention. The wind goes glassy all day, with a light N to NNE breeze. The swell is a consistent 4 ft to 4 ft from the NE. The energy is moderate (207 in the afternoon), and the conditions look glassy. For a point break or reef, this is the kind of clean, user-friendly swell that’s good for a lot of skill levels. The morning of the 17th also looks glassy but the swell is a touch smaller.
The very last highlight is on Friday, September 18th. Another long-period SW groundswell, 19 seconds, but only 1 ft. The energy is moderate at 232, and the wind is light, so it’s a clean little wave for the longboard or a big SUP.
Overall, the best bet for a decent session is the glassy conditions on Wednesday, September 16th. The swell is modest, not too big for the average surfer, and the wind is perfect. If you’re an expert looking for energy, keep an eye on Tuesday, September 15th afternoon, but that’s a long-range call and less certain.
Rusty.
Short Range ForecastLight rain (total 5mm), mostly falling on Sun night. Warm (max 29°C on Sun afternoon, min 25°C on Fri night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 3mm), mostly falling on Mon afternoon. Warm (max 29°C on Mon afternoon, min 26°C on Mon morning). Winds decreasing (fresh winds from the SE on Mon night, calm by Wed morning). | ||||||||||||||||||||
Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | |||||||||||||||
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 6 | NE 7 | NE 6 | NE 6 | NE 6 | NE 6 | NE 6 | NE 12 | SSW 14 | SW 14 | SW 15 | SW 12 | W 11 | W 10 | WNW 9 | NW 9 | NW 10 | NW 10 | NE 7 | NE 7 | NE 7 |
Wave Graph | |||||||||||||||||||||
106 | 84 | 70 | 78 | 106 | 76 | 75 | 240 | 0 | 2840 | 7059 | 4378 | 841 | 284 | 119 | 125 | 141 | 138 | 83 | 64 | 69 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | off | off | off | off | cross-off | off | cross-off | cross-off | cross | cross | cross | cross-off | on | on | off | off | off | off |
High Tide | 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 | 3:59PM0.61m | 4:31AM0.47m | |||||||
Low Tide | 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 | 9:30AM0.07m | 10:28PM0.04m | ||||||||
6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | |
— | 6:45 | — | — | 6:45 | — | — | 6:44 | — | — | 6:43 | — | — | 6:42 | — | — | 6:40 | — | — | 6:39 | — | |
mm | — | — | — | — | — | — | — | 1 | 4 | — | 1 | 1 | 1 | — | — | — | — | — | — | — | — |
Temp °C | 27 | 27 | 25 | 26 | 27 | 26 | 27 | 29 | 25 | 28 | 29 | 27 | 27 | 28 | 27 | 27 | 28 | 27 | 27 | 28 | 25 |
Feels °C | 25 | 25 | 24 | 26 | 26 | 27 | 29 | 30 | 28 | 30 | 29 | 26 | 27 | 30 | 30 | 32 | 32 | 29 | 27 | 27 | 24 |
Swell 1 Height (m) Direction Period (s) | S 13 | S 12 | S 13 | S 12 | S 12 | SSW 12 | SSW 12 | SSW 12 | SSW 14 | SW 14 | SW 15 | SW 12 | W 11 | SSW 8 | SSW 8 | SSW 14 | NW 10 | NW 10 | NE 7 | NW 9 | SW 16 |
643 | 613 | 630 | 738 | 1004 | 916 | 1125 | 749 | 2089 | 2840 | 7059 | 4378 | 841 | 353 | 142 | 273 | 141 | 138 | 75 | 64 | 268 | |
Swell 2 Height (m) Direction Period (s) | E 14 | E 14 | E 14 | SSW 17 | E 13 | E 13 | SSW 20 | SSW 15 | ENE 7 | SSE 8 | SSW 17 | SSW 15 | SSW 15 | W 10 | SSW 14 | SSW 8 | SSW 13 | SSW 13 | NW 9 | SSW 12 | SSW 12 |
33 | 35 | 64 | 166 | 55 | 85 | 76 | 829 | 93 | 122 | 745 | 696 | 481 | 284 | 356 | 83 | 257 | 176 | 83 | 123 | 81 | |
Swell 3 Height (m) Direction Period (s) | SW 12 | SW 13 | N 11 | E 14 | NNE 10 | N 8 | SSE 10 | NE 12 | SSW 18 | SSW 17 | NE 7 | ENE 12 | ENE 11 | SSW 14 | WNW 9 | NW 9 | SSW 8 | SSW 7 | SSW 13 | SSW 18 | NW 9 |
6 | 26 | 10 | 59 | 19 | 12 | 9 | 240 | 348 | 459 | 60 | 180 | 157 | 449 | 119 | 125 | 58 | 29 | 131 | 211 | 37 | |
Wind waves Height (m) Direction Period (s) | NE 6 | NE 7 | NE 6 | NE 6 | NE 6 | NE 6 | NE 6 | — | — | — | SE 8 | — | SSW 9 | — | — | — | — | — | — | NE 7 | NE 7 |
106 | 84 | 70 | 78 | 106 | 76 | 75 | — | — | — | 908 | — | 666 | — | — | — | — | — | — | 60 | 69 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 171 | 22 | 124 | 25 | 0 | 6 | 5 | 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.










