Surf Forecasts:
Ranches surf forecast from 31 Aug 2026:
- Best quality surf: Monday 31 Aug, 8PM (local time) - 4ft (1.2m), 7s period, NE swell with offshore winds.
- Most powerful swell: Thursday 3 Sep, 5PM (local time) - 5ft (1.5m), 7s period, NE swell with 235 kJ wave energy.
- Next surfable swell (1★+): Monday 31 Aug, 11AM (local time) - 4.5ft (1.3m), 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 Monday (Aug 31) at 11AM. The primary swell is predicted to be 1.3m and 8s 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 1.5m 7s and forecast to arrive on Thursday (Sep 03) at 5PM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.5m 7s period and expected on Saturday (Sep 05) at 11AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11AM (Mon 31st Aug) | 4.5ft (1.3m) 8s |
| Best Surf | 8PM (Mon 31st Aug) | 4ft (1.2m) 7s |
| Most Powerful | 5PM (Thu 3rd Sep) | 5ft (1.5m) 7s |
Table - best surf conditions forecast for Ranches over the next 16 days.
The Lowdown
Right, let’s have a look at what’s cookin’ for the next couple of weeks. The pick of the bunch around here is the Ranches, a proper reef set-up that takes a north-west swell to really light up. It’s an advanced wave, so take that in mind. The water temp is bang on average for the time of year at 81°F.
Alright, starting out on Monday the 31st of August and Tuesday the 1st of September, we’ve got small, clean surf on offer. Swell sizes are hanging around the 4ft to 4ft mark, coming from the NE, with a short period of 7-8 seconds. The winds are offshore, keeping it tidy. The energy in the water is moderate, reading between 121 and 179. Honestly, it’s not going to blow your mind, but it’s surfable, and the mornings will be the better call.
Wednesday the 2nd stays much the same story. Swell is still NE, 4ft to 4ft, short period. The morning is a bit cross-off but still clean, while the afternoon cleans up to a proper offshore breeze. More moderate energy (163-186). It’s okay, not a standout.
Thursday the 3rd sees some action. The morning drops right off, but by the afternoon a 5ft, NE swell kicks in with a period of 7 seconds. The energy jumps to 235, which is solid moderate. Winds are fresh offshore, so it’ll be clean. It’s a bit of a jump in size, but still a manageable wave for those with some experience.
From Friday the 4th through to Sunday the 6th, we’re back to that very ordinary 3ft to 4ft NE swell with short periods. Winds stay offshore or clean. Energy drops back into the lower to mid range (65-165). Nothing to get too excited about.
Monday the 7th and Tuesday the 8th get a bit messy. Monday has a messy cross-off wind and a tiny, mixed-up swell. Tuesday we see a stormy pattern with onshore winds and a long period (13 seconds) groundswell coming from the NW, but it’s only 1ft. Not worth it.
Wednesday the 9th has a small 3ft NE swell, but the afternoon goes completely glassy. That’s a nice window for a clean, small session if you’re desperate.
Thursday the 10th morning is all glassy again with a tiny 2ft swell from the SW, but the period is a massive 16 seconds. That long period will make it fat and tricky on a beach, but at a reef like the Ranches, it could produce a few long lines. The combined energy is 127. The afternoon packs up with a strong offshore, but no height.
Friday the 11th into Saturday the 12th is where the real interest starts. Friday is a write-off, but Saturday morning the 12th we see the first proper standout. A clean, 2ft SW groundswell with a very long period of 17 seconds rolls in. The energy is a strong 242. Winds are light offshore. This long period swell at a reef break like the Ranches is a classic setup for clean, rippable waves. The sets will be fat and the lulls long, but it’s the best quality of the run.
Sunday the 13th and Monday the 14th go back to poor, onshore conditions with small, messy swell.
Here is your standout:
Without a doubt, the best surf on offer is on Saturday the 12th of September. The Ranches will be firing for the advanced crew. That’s a 2ft SW groundswell with a 17-second period, paired with light offshore NNE winds in the morning. The energy in the water is strong at 242. It’s not a big wave, but the quality and clean conditions will make it the stand-out session. Early morning glass is likely.
Rusty.
Short Range ForecastMostly dry. Warm (max 29°C on Wed afternoon, min 25°C on Mon night). Mainly fresh winds. | Days 4-6 Weather SummaryMostly dry. Warm (max 29°C on Sat morning, min 25°C on Thu night). Winds decreasing (fresh winds from the NE on Thu afternoon, light winds from the E by Sat night). | ||||||||||||||||||||
Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | |||||||||||||||
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 8 | NE 8 | NE 7 | NE 7 | NE 7 | NE 7 | NE 7 | NE 7 | NE 7 | S 14 | NE 7 | NE 7 | NE 7 | NE 7 | NE 7 | NNE 10 | NE 7 | NE 8 | NE 7 | NE 7 | SW 9 |
Wave Graph | |||||||||||||||||||||
179 | 160 | 121 | 121 | 152 | 115 | 156 | 136 | 151 | 0 | 235 | 0 | 165 | 160 | 153 | 20 | 147 | 164 | 100 | 65 | 95 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | off | off | off | cross-off | off | off | off | off | off | off | off | off | off | off | off | off | off | off |
High Tide | 6:08PM0.41m | 7:34AM0.53m | 6:40PM0.33m | 8:41AM0.56m | 7:14PM0.25m | 9:59AM0.59m | 8:17PM0.19m | 11:18AM0.62m | 10:55PM0.16m | 12:25PM0.66m | 00:38AM0.18m | 1:20PM0.69m | 1:41AM0.23m | ||||||||
Low Tide | 12:40PM0.19m | 00:28AM0.05m | 1:58PM0.23m | 1:01AM0.05m | 3:56PM0.25m | 1:43AM0.06m | 6:40PM0.22m | 2:42AM0.08m | 7:48PM0.17m | 4:04AM0.09m | 8:21PM0.13m | 5:29AM0.08m | 8:49PM0.10m | ||||||||
6:15 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | |
— | 6:50 | — | — | 6:49 | — | — | 6:47 | — | — | 6:46 | — | — | 6:45 | — | — | 6:45 | — | — | 6:44 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 27 | 28 | 26 | 28 | 28 | 26 | 28 | 29 | 26 | 27 | 27 | 25 | 26 | 27 | 26 | 29 | 29 | 27 | 29 | 30 | 27 |
Feels °C | 26 | 26 | 25 | 28 | 26 | 26 | 28 | 28 | 26 | 25 | 24 | 23 | 24 | 25 | 26 | 31 | 30 | 28 | 31 | 31 | 28 |
Swell 1 Height (m) Direction Period (s) | SSW 15 | SSW 14 | NE 7 | SSW 18 | S 18 | NE 7 | S 16 | S 16 | S 15 | S 14 | S 14 | SE 12 | SSE 12 | SSE 11 | S 11 | S 10 | S 10 | SSW 10 | SSW 10 | SW 10 | SW 9 |
191 | 183 | 121 | 333 | 314 | 115 | 427 | 406 | 352 | 268 | 192 | 152 | 252 | 280 | 410 | 345 | 327 | 245 | 251 | 234 | 95 | |
Swell 2 Height (m) Direction Period (s) | S 11 | S 11 | S 19 | SSW 14 | S 12 | S 17 | SSE 10 | S 12 | S 11 | S 10 | SE 15 | S 13 | ESE 8 | ESE 8 | E 13 | SSW 18 | SSW 18 | SSW 16 | NE 7 | SSW 16 | SSW 15 |
57 | 55 | 273 | 115 | 77 | 373 | 33 | 66 | 58 | 33 | 60 | 176 | 26 | 23 | 30 | 121 | 121 | 147 | 100 | 223 | 201 | |
Swell 3 Height (m) Direction Period (s) | SSW 18 | SSW 19 | S 10 | S 10 | SW 14 | SW 14 | SW 14 | SW 13 | SSW 13 | SE 15 | S 10 | E 12 | S 13 | SSW 13 | SSW 20 | NNE 10 | E 13 | E 13 | SSW 16 | SSE 12 | SSW 18 |
31 | 123 | 52 | 46 | 53 | 50 | 30 | 27 | 17 | 36 | 18 | 12 | 92 | 34 | 37 | 20 | 55 | 53 | 229 | 107 | 266 | |
Wind waves Height (m) Direction Period (s) | NE 8 | NE 8 | ENE 8 | NE 7 | NE 7 | E 8 | NE 7 | NE 7 | NE 7 | ENE 7 | NE 7 | NE 7 | NE 7 | NE 7 | NE 7 | ENE 7 | NE 7 | NE 8 | — | NE 7 | NNE 7 |
179 | 160 | 251 | 121 | 152 | 223 | 156 | 136 | 151 | 188 | 235 | 211 | 165 | 160 | 153 | 228 | 147 | 164 | — | 65 | 83 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 153 | 0 | 0 | 0 | 0 | 153 | 154 | 154 | 154 | 0 | 0 | 2 | 0 | 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.











