Kahuku Ranch Surf Break

Lat Long: 18.95° N 155.71° W

Issued: 1 pm 20 Jun 2026 (local time)

Forecast update in  hr  min

Today's Kahuku Ranch sea temperature is
26.1° C

Slightly warmer than usual

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


Kahuku Ranch surf forecast from 21 Jun 2026:

  • Best quality surf: Sunday 21 Jun, 11AM (local time) - 2ft (0.6m), 19s period, S swell with cross-offshore winds.
  • Most powerful swell: Wednesday 24 Jun, 11AM (local time) - 3.5ft (1.0m), 18s period, SSW swell with 655 kJ wave energy.
  • Next surfable swell (1★+): Sunday 21 Jun, 11AM (local time) - 2ft (0.6m), 19s period with S swell.

Best Forecast Surf Conditions for Kahuku Ranch this week:

The surf forecast for Kahuku Ranch over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Jun 21) at 11AM. The primary swell is predicted to be 0.6m and 19s period with a secondary swell of 0.7m and 13s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Kahuku Ranch in the next 16 days are 1.0m 18s and forecast to arrive on Wednesday (Jun 24) at 11AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.1m 7s period and expected on Friday (Jun 26) at 2PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)11AM (Sun 21st Jun)2ft (0.6m) 19s
Best Surf11AM (Sun 21st Jun)2ft (0.6m) 19s
Most Powerful11AM (Wed 24th Jun)3.5ft (1.0m) 18s

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


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Mostly dry. Warm (max 27°C on Sat afternoon, min 24°C on Sun night). Mainly fresh winds.

Days 5-7 Weather Summary

Light rain (total 2mm), mostly falling on Wed afternoon. Warm (max 27°C on Tue afternoon, min 24°C on Tue night). Mainly fresh winds.

Sat
20
Sunday
21
Monday
22
Tuesday
23
Wednesday
24
Thursday
25
Friday
26
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
Rating
(10 max)
0
1
3
1
0
1
0
1
2
1
0
1
1
0
0
0
0
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.6
S
15
0.8
S
14
0.6
S
19
0.6
S
18
0.6
S
18
0.6
S
16
0.6
S
16
0.6
SE
13
0.6
SE
13
0.5
S
20
0.6
S
17
1
SSW
18
0.8
SSW
17
0.8
SSW
16
0.8
SSW
16
0.7
SSW
15
0.7
SSW
14
0.6
SSW
14
0.6
SSW
13
0.4
SSW
21
0.7
SSW
20
Wave Graph
Metric surfscale
Energy kJ
157
257
266
235
225
188
188
144
140
194
200
655
404
341
333
225
215
149
137
153
395
Wind (km/h)
25
E
20
E
10
E
25
E
25
ENE
20
E
30
E
20
ENE
15
E
20
E
25
ENE
30
E
25
ENE
30
ENE
35
E
30
E
30
ENE
30
E
35
ENE
30
ENE
30
ENE
Wind State
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
High Tide
8:13PM0.77m
9:52AM0.59m
8:59PM0.67m
11:05AM0.66m
9:51PM0.59m
12:06PM0.73m
10:51PM0.52m
12:54PM0.80m
11:56PM0.47m
1:36PM0.85m
00:55AM0.45m
2:14PM0.89m
1:45AM0.44m
Low Tide
3:18AM0.16m
3:06PM0.39m
4:01AM0.16m
4:49PM0.42m
4:43AM0.16m
6:30PM0.41m
5:24AM0.15m
7:44PM0.36m
6:06AM0.14m
8:35PM0.32m
6:48AM0.12m
9:15PM0.27m
7:29AM0.10m
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
clear
clear
clear
clear
clear
rain showers
rain showers
clear
clear
clear
clear
part cloud
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:46
5:46
5:46
5:47
5:47
5:47
5:47
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:01
7:01
7:01
7:02
7:02
7:02
7:02
7:02
 mm
1
1
Temp °C
27
25
25
25
25
25
25
25
27
27
25
26
26
25
26
26
25
26
27
25
26
Feels °C
27
24
25
25
24
24
24
23
27
27
24
24
24
24
23
22
23
24
25
23
23
Swell 1
Height (m)
Direction
Period (s)
0.6
S
15
0.8
S
14
0.7
S
13
0.7
S
13
0.6
S
18
0.6
S
16
0.6
S
16
0.6
SE
13
0.6
SE
13
0.6
SE
13
0.6
S
17
1
SSW
18
0.8
SSW
17
0.8
SSW
16
0.8
SSW
16
0.7
SSW
15
0.7
SSW
14
0.6
SSW
14
0.6
SSW
13
0.5
SSW
13
0.7
SSW
20
Energy kJ
157
257
171
168
225
188
188
144
140
138
200
655
404
341
333
225
215
149
137
98
395
Swell 2
Height (m)
Direction
Period (s)
0.6
S
12
0.4
SE
16
0.6
S
19
0.6
SE
15
0.6
S
12
0.6
SE
14
0.6
SE
14
0.4
S
12
0.4
SSW
15
0.5
S
16
0.6
SE
13
0.6
SE
12
0.5
SE
12
0.5
SE
12
0.4
SE
12
0.4
SE
12
0.4
SE
11
0.3
SE
11
0.4
SE
11
0.4
SSW
21
0.5
S
12
Energy kJ
101
91
266
174
112
160
151
43
71
129
103
93
72
69
50
48
31
19
30
153
77
Swell 3
Height (m)
Direction
Period (s)
0.4
SE
16
0.3
S
21
0.6
SE
15
0.6
S
18
0.6
SE
15
0.5
S
12
0.5
S
12
0.4
S
15
0.4
S
11
0.5
S
20
0.5
S
20
0.1
NW
9
0.1
NW
9
0.1
NW
13
0.2
WNW
12
0.2
WNW
12
0.2
WNW
11
0.2
WNW
11
0.2
WNW
11
0.4
SE
11
0.2
SSW
16
Energy kJ
93
79
141
235
134
69
69
74
39
194
194
3
3
7
15
14
12
12
11
30
25
Wind waves
Height (m)
Direction
Period (s)
1.4
E
6
1.3
E
7
1.2
E
7
1.1
E
7
1.4
E
6
1.4
E
6
1.2
E
6
1.5
E
6
1
E
7
1
E
8
1.7
E
7
1.7
E
6
1.7
E
6
1.4
E
7
1.9
E
7
1.7
E
7
2
E
7
1.9
E
7
2
E
7
1.9
E
7
1.9
E
7
Energy kJ
163
145
126
110
123
137
106
148
108
111
247
226
219
181
348
303
384
357
385
367
388
Nearest Offshore or Glassy
Rating
(10 max)
2
1
3
2
2
1
2
1
2
1
2
1
1
2
1
2
2
1
1
2
2
Distance (km)
200
108
0
200
81
112
200
81
0
112
108
112
100
81
112
112
62
100
112
62
112
Best forecast wave conditions in Big Island
Rating
(10 max)
1
3
2
1
1
2
1
2
1
1
2
1
2
2
1
1
2
2
Best forecast wave conditions in United States
Rating
(10 max)
2
3
3
2
2
1
3
3
3
2
3
2
2
3
3
2
3
2
2
4
3
Header Global
Rating
(10 max)
9
7
7
7
5
6
6
5
6
8
8
6
5
5
5
5
5
5
5
7
5
  • Map Icons:
  • Break
  • 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 Kahuku Ranch Surf forecast

The above surf forecast table for Kahuku Ranch provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Kahuku Ranch can be found by selecting the local surf guide option on the grey menu. Our Kahuku Ranch 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 (Kahuku Ranch) 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 Kahuku Ranch 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.

Kahuku Ranch is 107 km (66 miles) from Hilo. If you plan a vacation in Big Island, look for hotels and other accommodation in Hilo. Hilo has rooms for a wide range of budgets as well as car hire and transport links.

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