Ranches Surf Break

Lat Long: 21.50° N 158.23° W

Ranches Surf Forecast and Surf Report

Issued: 7 pm 13 Sep 2026 (local time)

Forecast update in  hr  min

Today's Ranches sea temperature is
27.1°C
0.1° 

Ranches surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Ranches surf forecast from 14 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★+): Monday 14 Sep, 5AM (local time) - 1.5ft (0.5m), 14s period with SW 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 (Sep 14) at 5AM. The primary swell is predicted to be 0.5m and 14s period with a secondary swell of 0.7m and 8s. 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 1.7m 7s period and expected on Sunday (Sep 20) at 11AM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 5AM (Mon 14th Sep)1.5ft (0.5m) 14s
Best Surf11PM (Tue 15th Sep)3ft (0.9m) 19s
Most Powerful11PM (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 break down the next couple of weeks. It's a tale of two halves—a lot of small, clean but unexciting waves, followed by a proper pulse late in the month. There’s a big dry spell in the middle, around the 22nd to the 26th, so don't get twitchy.

Ranches (reef)

Monday the 14th starts quiet. The standout moment is a tiny 2 ft SW groundswell in the afternoon with a very long 22-second period and glassy conditions. The combined energy is moderate (296), but it's barely breaking. Still, the flat water is nice.

From Tuesday the 15th through the end of the week, it's all small, clean NE windswell. Wave heights run from 2 ft to 4 ft, but the periods are short at 6-7 seconds. Winds are offshore and clean, which is the only saving grace. Combined energy is weak, mostly between 60 and 170. It's ankle to knee high on the sets; good for a foamie but nothing more. Thursday morning the 17th sees the strongest wind at 25-30 km/h, making the surface a bit rough despite being offshore.

The 19th through the 21st are flat. No swell at all.

Then comes the big lull. From the 22nd to the 26th, it's just poor. Tiny 1.0 ft to 2 ft weak NW/NNW windswell. The energy readings are pathetic, mostly under 50. Strong offshore winds keep the surface clean, but there's nothing to catch. It's a real desert.

Now, the payoff. Sunday the 27th of September sees a nice 2 ft WNW groundswell with an 18-second period start to fill in. Combined energy jumps to a solid moderate 287. Winds are moderate offshore from the NE. This is genuine long-period groundswell, so it'll wrap in nicely here—the sets will be clean, well-spaced, and have some actual push.

But the one to circle is Monday the 28th of September. We’ve got a 3 ft NW swell with a long 15-second period, and the combined energy rockets to 590 (strong wave energy). The wind is light offshore from the ENE in the morning. This is as clean as it gets—glassy, good size, proper energy. It's going to be a cracker of a session for the experienced crew. The wind stays light all day, just a gentle breeze in the afternoon keeping the surface clean.

Tuesday the 29th still has some leftovers: a 4 ft NE swell with glassy conditions. A good follow-up day.

Bottom line: hold out for that late September groundswell. The 28th is the clear standout—solid size, long period, clean wind, and strong energy. Crowds are possible here at Ranches, so get there early for that Monday morning glass-off.

- Rusty

Short Range Forecast

Mostly dry. Warm (max 29°C on Wed afternoon, min 25°C on Sun night). Wind will be generally light.

Days 5-7 Weather Summary

Light rain (total 2mm), mostly falling on Thu afternoon. Warm (max 30°C on Fri afternoon, min 26°C on Wed night). Wind will be generally light.

Monday
14
Tuesday
15
Wednesday
16
Thursday
17
Friday
18
Saturday
19
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
1
2
2
1
1
3
1
0
1
1
1
1
1
1
0
0
0
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.3
SW
24
0.7
NE
8
0.5
SW
22
0.5
SW
21
0.7
NE
8
0.7
NE
8
0.9
SW
19
0.8
NE
7
0.9
NE
6
1.1
NE
7
1.2
NE
7
1.1
NE
7
1.1
NE
7
0.9
NE
6
1
NE
7
0.7
NE
6
0.9
SSW
15
0.9
SSW
16
0.9
NE
7
Wave Graph
Metric surfscale
Energy kJ
87
70
227
224
64
60
535
62
54
99
152
136
130
61
93
39
0
0
75
Wind (km/h)
10
ENE
5
NNE
5
E
10
ENE
5
NNW
0
SSE
15
ENE
20
NE
30
NE
25
NE
25
NE
20
ENE
15
E
10
ENE
20
ENE
15
E
10
E
15
ENE
10
E
Wind State
off
cross-off
glassy
off
glassy
glassy
off
off
off
off
off
off
off
off
off
off
off
off
off
High Tide
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
11:54AM0.55m
00:39AM0.20m
Low Tide
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
8:01PM0.16m
clear
part cloud
clear
clear
clear
clear
part cloud
part cloud
clear
part cloud
part cloud
thunderstorm
thunderstorm
clear
clear
clear
clear
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:18
6:18
6:20
6:20
6:20
6:20
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:37
6:37
6:36
6:35
6:34
6:32
6:31
 mm
1
1
Temp °C
26
27
28
26
28
27
27
28
29
26
28
29
27
29
30
27
28
29
26
Feels °C
26
29
29
27
32
30
29
29
28
26
29
30
29
30
31
28
29
31
27
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  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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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