Ranches Surf Break

Lat Long: 21.50° N 158.23° W

Ranches Surf Forecast and Surf Report

Issued: 7 pm 17 Aug 2026 (local time)

Forecast update in  hr  min

Today's Ranches sea temperature is
27.0° C
0.2° 

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


Ranches surf forecast from 18 Aug 2026:

  • Best quality surf: Tuesday 18 Aug, 2AM (local time) - 2.5ft (0.8m), 6s period, NE swell with offshore winds.
  • Most powerful swell: Thursday 20 Aug, 11AM (local time) - 2ft (0.6m), 18s period, SW swell with 249 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 18 Aug, 2AM (local time) - 2.5ft (0.8m), 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 Tuesday (Aug 18) at 2AM. The primary swell is predicted to be 0.8m 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 0.6m 18s and forecast to arrive on Thursday (Aug 20) at 11AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 6s period and expected on Saturday (Aug 22) at 11PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 2AM (Tue 18th Aug)2.5ft (0.8m) 6s
Best Surf 2AM (Tue 18th Aug)2.5ft (0.8m) 6s
Most Powerful11AM (Thu 20th Aug)2ft (0.6m) 18s

Table - best surf conditions forecast for Ranches over the next 16 days.


The Lowdown

Alright, Rusty here. Let me tell you what’s cooking.

Honestly, the next couple of weeks aren’t looking like a surfing bonanza for us. There’s a big blank patch starting now, and we’re not getting anything worth paddling out for until Wednesday morning, August 19th. From then on, it’s mostly a run of very ordinary, small stuff. There’s no real standout, high-quality swell heading our way, so you gotta keep your expectations low.

August 19th (Wednesday) – This is the most interesting session in the whole outlook, but it’s still a strange one. Ranches is a reef setup that’s exposed to the NW, and we get a tiny 2 ft swell coming from the SW, which is the complete opposite of the optimum direction. The real story here is the period: a massive 16 seconds, making it a very long period groundswell. This kind of energy is weird for a beach, but on a reef, it could wrap in and produce some clean, lined-up waves. The combined energy is moderate (157). The wind is dead calm, glassy as a lake in the morning, and that will make for a slick, clean surface. The wave is tiny, though, so it’s really only for a longboard and someone who knows the reef. A crowd could show up since it’s sometimes busy here, but on waves this small, it’s unlikely.

August 20th (Thursday) – A bit of a letdown after the glassy morning. Thursday morning offers a 2 ft swell from the SW again, with a very long period of 18 seconds, giving us a decent 277 (moderate) energy. Problem is the wind is a cross-shore from the NNW at 6 mph, putting little ripples on the face. The morning is marginal. Thursday afternoon cleans up with light offshore wind from the east, but the swell drops to a 2 ft from the NNE and the period collapses to 7 seconds. It’s surfable but ordinary.

August 21st (Friday) through August 25th (Tuesday) – A long, flat spell of tiny surf and moderate to fresh offshore winds. We see consistent offshore breezes from the ENE and NE, but the swell hovers around 1 ft to 2 ft with periods mostly under 8 seconds. The energy is weak, scraping the bottom of the scale (between 35 and 175). This is the definition of “surfable but very ordinary.” It would take a longboard or a foiler to have any fun. The water temperature feels about average for this time of year.

August 26th (Wednesday) and 27th (Thursday) – Still small. Slight bump where the swell climbs to 4 ft – 4 ft from the NE, but the period is still short at 6-7 seconds. Combined energy stays moderate (95–149). Offshore winds keep it clean, but without any power or push, it’s just lumpy, weak waves. Another stretch of “meh.”

August 28th (Friday) – A total flat day. Zero energy. No swell at all. Don’t bother heading down.

August 29th (Saturday) to September 2nd (Wednesday) – We limp to the end with tiny, weak swell from the NE. 1 ft to 3 ft, period never over 7 seconds. Combined energy is very weak (14–58). Offshore winds are a constant feature, keeping the surface clean, but there’s just no wave face to ride. For the last few days there’s no swell recorded at all.

Bottom line: The 19th is the only real point of interest, and that’s because the long period and glassy conditions could make it a weird, fun novelty wave on the reef. For everyone else, it’s a longboard-only, very ordinary window. This area tends to have quiet runs like this, but it won’t stay this way forever.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 28°C on Thu afternoon, min 24°C on Mon night). Wind will be generally light.

Days 5-7 Weather Summary

Mostly dry. Warm (max 29°C on Sat afternoon, min 24°C on Thu night). Wind will be generally light.

Tuesday
18
Wednesday
19
Thursday
20
Friday
21
Saturday
22
Sunday
23
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
0
0
0
1
0
0
1
0
0
0
1
1
1
1
1
1
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)
0.8
NE
6
0.6
NE
6
0.7
NE
6
0.3
WNW
12
0.5
SW
16
0.6
NNE
6
0.6
NNE
6
0.6
SW
18
0.6
NNE
7
0.6
NE
7
0.6
NNE
7
0.5
W
10
0.5
W
10
0.5
W
10
0.4
WNW
13
0.7
WNW
12
0.6
NW
11
0.6
NW
11
0.5
NW
10
Wave Graph
Metric surfscale
Energy kJ
47
28
32
28
129
26
24
249
29
38
35
49
49
52
62
121
99
94
54
Wind (km/h)
15
E
5
ENE
15
NE
15
E
0
N
5
SW
10
ENE
10
NNW
10
E
10
NE
10
SW
5
WSW
5
NE
5
ENE
15
ENE
20
ENE
20
ENE
30
NE
25
NE
Wind State
off
glassy
off
off
glassy
glassy
off
cross
off
off
cross-on
glassy
off
glassy
off
off
off
off
off
High Tide
9:19AM0.48m
7:36PM0.27m
10:33AM0.50m
11:45AM0.53m
10:31PM0.18m
12:45PM0.56m
00:28AM0.18m
1:32PM0.60m
1:26AM0.20m
2:12PM0.62m
2:06AM0.23m
Low Tide
1:45AM0.08m
4:14PM0.27m
2:19AM0.10m
3:05AM0.12m
8:45PM0.20m
8:59PM0.17m
5:24AM0.12m
9:18PM0.16m
6:26AM0.10m
9:36PM0.14m
clear
clear
part cloud
clear
clear
part cloud
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:11
6:11
6:11
6:13
6:13
6:13
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:00
7:00
7:00
6:59
6:58
6:58
6:57
 mm
Temp °C
26
26
27
25
26
26
25
27
28
26
26
27
26
28
29
26
27
28
26
Feels °C
27
28
29
24
29
28
27
29
30
29
29
30
30
30
30
27
27
27
26
  • Map Icons:
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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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