
Surf Forecasts:
Ranches surf forecast from 13 Sep 2026:
- Best quality surf: Tuesday 15 Sep, 11PM (local time) - 3ft (0.9m), 19s period, SW swell with offshore winds.
- Most powerful swell: Tuesday 15 Sep, 11PM (local time) - 3ft (0.9m), 19s period, SW swell with 546 kJ wave energy.
- Next surfable swell (1★+): Saturday 12 Sep, 11PM (local time) - 2.5ft (0.7m), 9s 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 Saturday (Sep 12) at 11PM. The primary swell is predicted to be 0.7m and 9s 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 0.9m 19s and forecast to arrive on Tuesday (Sep 15) at 11PM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 8s period and expected on Saturday (Sep 19) at 11AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Sat 12th Sep) | 2.5ft (0.7m) 9s |
| Best Surf | 11PM (Tue 15th Sep) | 3ft (0.9m) 19s |
| Most Powerful | 11PM (Tue 15th Sep) | 3ft (0.9m) 19s |
Table - best surf conditions forecast for Ranches over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s have a look at what’s on the cards for the next couple of weeks at Ranches.
The week ahead is pretty quiet, with nothing much to get excited about until we get past the middle of the month. The water is sitting at a warm 81°F, which is pretty much spot on for the time of year, so that’s a nice bonus when you do get in.
Saturday 12th September offers a tiny tease: glassy conditions with a 2ft swell from the SW, but it’s a very long period of 16 seconds. This is a groundswell with moderate energy (295), so it’ll have some push, but that length means it might break a bit too straight across the reef. Still, it’s clean.
The next real chance comes on Monday 14th September. The morning is dead flat, but the afternoon shows a 2ft SW groundswell with a very long 22-second period. Combined energy is moderate (296), and with glassy conditions, this could offer some clean, if small, lines. It’s a tricky one, as that period is very long for a reef, but if the tide is right, you might score a few.
Things get a bit more interesting from Wednesday 16th September onwards, but it’s all small and short-period. Wednesday afternoon has 3ft from the NNE at 9 seconds, with a moderate offshore NE wind at 19 mph. The energy is moderate (129) and the surf is clean, but the swell is pretty weak. This pattern of small, offshore wind-swell continues through Thursday, with 4ft to 4ft from the NE and periods around 7 seconds. Energy stays in the moderate range (148-152). It’s surfable, but nothing to write home about.
We then hit a flat spell. Friday 18th and Saturday 19th have almost no energy at all, with readings of 4 and 0. The weekend is a write-off for surf.
The next little pulse shows up on Sunday 20th September afternoon: a 2ft SW groundswell with a 15-second period and moderate energy (115). Winds are gentle offshore from the ENE at 9 mph, so it’ll be clean, but again, very small.
There’s a run of small, clean offshore wind-swell from Tuesday 22nd through Thursday 24th September. The best of this is Thursday 24th morning, with 3ft from the NE at 10 seconds, glassy conditions, and a decent energy reading of 175. It’s still a small, average day.
Now, for the standout. Look towards the end of the month. Saturday 26th September afternoon brings a 5ft swell from the N, with a period of 12 seconds. The combined energy jumps to a strong 747. That’s a serious bump in power. Winds are light cross-shore from the S, so it won’t be perfect, but the size and period are there. The real gem looks to be Sunday 27th September morning. Glassy conditions, a 5ft N swell with a 10-second period, and very strong energy at 535. The forecast says “expect very good surf conditions.” For an advanced reef break like Ranches, this is the one to aim for. The 5ft is solid but not out of control, and that long period will mean proper, powerful lines. The wind stays clean offshore from the ENE in the afternoon at 12 mph, keeping it clean. This is the best on offer in the whole outlook.
Keep an eye on that Sunday 27th – it’s the one worth planning for.
- Rusty
Short Range ForecastMostly dry. Warm (max 28°C on Mon afternoon, min 24°C on Mon night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 29°C on Wed afternoon, min 25°C on Tue night). Winds increasing (calm on Tue afternoon, fresh winds from the NE by Wed afternoon). | |||||||||||||||||||
Sat 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | ||||||||||||||
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) | SW 16 | NE 9 | SW 15 | NE 9 | SW 24 | NE 8 | SW 22 | SW 21 | NNE 8 | NNE 8 | SW 19 | NE 7 | NNE 9 | SW 17 | NE 7 | NE 7 | SW 10 | NW 11 | NW 10 | SSW 16 |
Wave Graph | ||||||||||||||||||||
124 | 79 | 107 | 75 | 87 | 70 | 227 | 224 | 56 | 34 | 535 | 44 | 129 | 424 | 130 | 152 | 4 | 5 | 4 | 0 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-off | cross-on | glassy | off | glassy | glassy | off | on | glassy | off | off | off | off | off | off | off | off | off | off |
High Tide | 5:02PM0.47m | 5:51AM0.54m | 5:31PM0.40m | 6:34AM0.55m | 6:00PM0.33m | 7:22AM0.55m | 6:27PM0.27m | 8:19AM0.54m | 6:52PM0.22m | 9:30AM0.53m | 7:45PM0.18m | 10:47AM0.54m | 11:21PM0.18m | |||||||
Low Tide | 11:14PM0.05m | 12:03PM0.17m | 11:37PM0.06m | 1:03PM0.20m | 00:00AM0.08m | 2:21PM0.23m | 00:25AM0.11m | 4:24PM0.24m | 00:56AM0.13m | 7:32PM0.21m | 1:44AM0.16m | 7:41PM0.18m | 3:14AM0.18m | |||||||
— | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | 6:20 | — | — | 6:20 | — | — | 6:20 | — | — | |
6:38 | — | — | 6:37 | — | — | 6:37 | — | — | 6:36 | — | — | 6:35 | — | — | 6:34 | — | — | 6:32 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 27 | 26 | 26 | 26 | 26 | 26 | 28 | 26 | 26 | 28 | 27 | 28 | 29 | 26 | 27 | 28 | 27 | 29 | 29 | 27 |
Feels °C | 28 | 28 | 28 | 28 | 28 | 29 | 30 | 26 | 28 | 31 | 29 | 28 | 28 | 26 | 27 | 27 | 28 | 31 | 32 | 28 |
Swell 1 Height (m) Direction Period (s) | NE 9 | NE 9 | NE 9 | NE 9 | NE 9 | NE 8 | SW 22 | NE 8 | SSW 20 | SW 19 | SW 19 | SSW 18 | SSW 18 | SW 17 | SSW 16 | SSW 16 | SSW 18 | SSW 17 | SSW 17 | SSW 16 |
79 | 79 | 79 | 75 | 75 | 70 | 227 | 67 | 490 | 384 | 535 | 541 | 541 | 424 | 322 | 322 | 768 | 615 | 675 | 532 | |
Swell 2 Height (m) Direction Period (s) | SW 16 | SSW 13 | SW 15 | SSW 15 | SSW 14 | SSW 14 | SW 14 | SW 21 | NNE 8 | NNE 8 | NE 8 | SW 12 | SW 11 | SW 11 | SSW 20 | SSW 19 | SSE 10 | SSE 10 | SE 8 | SSE 8 |
124 | 116 | 107 | 84 | 134 | 76 | 48 | 224 | 56 | 34 | 57 | 34 | 31 | 30 | 216 | 210 | 9 | 9 | 17 | 26 | |
Swell 3 Height (m) Direction Period (s) | SW 13 | SSW 16 | SW 12 | SW 12 | SW 24 | SSW 24 | SSW 11 | SSW 13 | SW 13 | NE 5 | SW 12 | NNE 9 | SSW 8 | SSW 21 | SW 11 | E 10 | SW 10 | NW 11 | NW 10 | S 20 |
87 | 98 | 37 | 37 | 87 | 54 | 23 | 68 | 41 | 8 | 38 | 8 | 6 | 44 | 18 | 18 | 4 | 5 | 4 | 67 | |
Wind waves Height (m) Direction Period (s) | SSE 5 | ENE 4 | — | — | E 4 | E 5 | NE 8 | E 5 | — | — | ENE 5 | NE 7 | NNE 9 | NE 6 | NE 7 | NE 7 | NE 7 | ENE 7 | ENE 7 | ENE 7 |
5 | 4 | — | — | 9 | 10 | 69 | 12 | — | — | 28 | 44 | 129 | 56 | 130 | 152 | 119 | 131 | 99 | 81 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 0 | 0 | 3 | 0 | 0 | 0 | 0 | 0 | 3 | 0 | 0 | 0 | 153 | 0 | 0 | 154 | 6 | 2 | 6 | 2 |
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.










