Surf Forecasts:
Ranches surf forecast from 12 Aug 2026:
- Best quality surf: Sunday 16 Aug, 8PM (local time) - 4.5ft (1.3m), 8s period, NE swell with cross-offshore winds.
- Most powerful swell: Sunday 16 Aug, 5PM (local time) - 5ft (1.6m), 10s period, NE swell with 452 kJ wave energy.
- Next surfable swell (1★+): Wednesday 12 Aug, 5PM (local time) - 2ft (0.6m), 12s period with N 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 (Aug 12) at 5PM. The primary swell is predicted to be 0.6m and 12s 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 1.6m 10s and forecast to arrive on Sunday (Aug 16) at 5PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.0m 8s period and expected on Sunday (Aug 16) at 11AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5PM (Wed 12th Aug) | 2ft (0.6m) 12s |
| Best Surf | 8PM (Sun 16th Aug) | 4.5ft (1.3m) 8s |
| Most Powerful | 5PM (Sun 16th Aug) | 5ft (1.6m) 10s |
Table - best surf conditions forecast for Ranches over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s break down the next couple weeks for Ranches (reef). It’s looking real flat for the most part, with just a few small, clean windows. Nothing with any punch, so don’t get your hopes up for a proper session unless you’re happy paddling for dribbles.
Water temp is sitting right around 81°, pretty average for this time of year, so no surprises.
The first chance for a wave comes Wednesday afternoon the 12th: tiny 2ft from the north, 12-second period. That’s a groundswell, and the energy is moderate (114). It’s clean with a NE offshore wind at 12 mph, but it’s just small and ordinary.
Thursday the 13th is a total flat day. Friday the 14th morning kicks up to 3ft from the NE, but with only a 7-second period, it’s weak and fat. The wind is offshore from the ENE at 12 mph, so it’s clean, but that swell is just lacking any drive. Saturday the 15th is 5ft from the NE, but the wind is howling at 22 mph and the period is 6-7 seconds, making it messy and blown-out. Not worth it.
Sunday the 16th has 4-5ft from the NE with an 8-9 second period, and the energy is strong (257-269), but the wind goes onshore from the ESE and SE. Dirty.
After that, it’s a long flat spell. From Monday the 17th through to the end of the period, expect mostly 0.7ft to 3ft from the NE, with very low energy. The best condition comes on Saturday the 22nd morning: 3ft from the NE, 6-second period, and glassy, calm winds. That’s your best shot for a clean, tiny wave. The only later standout is Wednesday the 23rd afternoon: a tiny 2ft from the SW, but with a very long 16-second period and moderate-strong energy (176). For a reef break that might actually hold a line, but it’s still just a dribble.
Bottom line: a very quiet 16 days. The surf never tops 5ft, so fine for beginners, but not worth a trip. The standout is Saturday the 22nd morning for a clean, glassy, tiny wave. If you’re a kite surfer, the windy days (15th, 16th) with onshore breeze will be way more interesting.
Rusty.
Short Range ForecastMostly dry. Warm (max 29°C on Wed afternoon, min 25°C on Tue night). Mainly fresh winds. | Days 5-7 Weather SummaryModerate rain (total 17mm), heaviest on Sat night. Warm (max 28°C on Sun afternoon, min 25°C on Sat night). Winds decreasing (near gales from the NE on Sat night, calm by Mon morning). | ||||||||||||||||||
Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | ||||||||||||||
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) | S 20 | S 18 | N 12 | NE 6 | W 12 | W 12 | NE 6 | W 12 | NE 7 | NE 7 | NE 7 | NE 6 | WNW 13 | WNW 12 | NE 10 | NE 8 | NE 8 | NE 7 | NE 7 |
Wave Graph  | |||||||||||||||||||
 kJ | 0 | 0 | 104 | 45 | 25 | 11 | 80 | 11 | 97 | 109 | 147 | 216 | 33 | 48 | 452 | 165 | 111 | 86 | 54 |
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 | off | cross-off | cross-off | cross-off | glassy | cross-off | off |
High Tide | 4:03AM0.28m | 4:33PM0.72m | 4:50AM0.33m | 5:08PM0.66m | 5:37AM0.37m | 5:42PM0.59m | 6:26AM0.41m | 6:14PM0.50m | 7:17AM0.44m | 6:44PM0.42m | 8:14AM0.46m | 7:12PM0.34m | |||||||
Low Tide | 10:58PM0.05m | 9:26AM-0.00m | 11:26PM0.04m | 10:16AM0.03m | 11:54PM0.04m | 11:07AM0.08m | 00:21AM0.04m | 12:01PM0.14m | 00:48AM0.05m | 1:01PM0.20m | 1:16AM0.06m | 2:17PM0.25m | 1:45AM0.08m | ||||||
 |  | | | | | | | |  |  | |  |  | | | | | | |
 | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — |
 | 7:06 | — | 7:05 | — | — | 7:04 | — | — | 7:04 | — | — | 7:02 | — | — | 7:01 | — | — | 7:00 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | 8 | 5 | 3 | — | — | 1 | — |
Temp °C | 26 | 27 | 29 | 25 | 28 | 28 | 26 | 28 | 28 | 26 | 27 | 27 | 26 | 27 | 28 | 27 | 27 | 28 | 26 |
Feels °C | 26 | 28 | 29 | 24 | 27 | 26 | 27 | 28 | 26 | 25 | 26 | 25 | 24 | 26 | 26 | 29 | 30 | 30 | 27 |
Swell 1 Height (m) Direction Period (s) | SSW 13 | S 18 | S 13 | S 16 | S 16 | S 15 | S 15 | S 14 | S 14 | S 14 | S 13 | S 13 | S 13 | S 13 | NE 10 | NE 8 | NE 8 | S 14 | S 13 |
| kJ | 299 | 509 | 392 | 1029 | 868 | 773 | 636 | 503 | 496 | 383 | 280 | 219 | 225 | 119 | 452 | 165 | 111 | 329 | 222 |
Swell 2 Height (m) Direction Period (s) | S 20 | SSW 13 | S 18 | WNW 12 | W 12 | ESE 7 | W 11 | W 12 | ESE 10 | E 11 | E 11 | W 13 | S 18 | S 17 | S 13 | SSE 8 | S 14 | SSE 6 | SSE 5 |
| kJ | 373 | 289 | 741 | 28 | 25 | 10 | 10 | 11 | 21 | 61 | 85 | 30 | 99 | 138 | 163 | 88 | 334 | 14 | 5 |
Swell 3 Height (m) Direction Period (s) | SE 8 | SE 9 | SW 18 | SE 9 | NNW 8 | W 12 | NNW 7 | NNW 8 | NNW 8 | NNW 8 | W 11 | S 16 | WNW 13 | WNW 12 | S 16 | S 14 | SSE 6 | SW 5 | SW 5 |
| kJ | 18 | 20 | 12 | 12 | 6 | 11 | 5 | 6 | 6 | 12 | 22 | 43 | 33 | 48 | 183 | 239 | 26 | 9 | 4 |
Wind waves Height (m) Direction Period (s) | ENE 7 | ENE 6 | N 12 | NE 6 | NE 6 | NE 5 | NE 6 | NE 7 | NE 7 | NE 7 | NE 7 | NE 6 | ENE 8 | ENE 8 | SE 6 | SE 7 | — | NE 7 | NE 7 |
| kJ | 30 | 36 | 104 | 45 | 43 | 42 | 80 | 100 | 97 | 109 | 147 | 216 | 339 | 1267 | 136 | 121 | — | 86 | 54 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 2 | 2 | 0 | 0 | 2 | 154 | 0 | 2 | 153 | 154 | 154 | 154 | 153 | 198 | 16 | 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.
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