Nanakuli Blackrocks surfForecast / HAW – Oahu / USA

information circle16 Day Weather and Surf, issued 7 am Wednesday 27 May 2026 HST
Forecast update in hr  min  s Forecast update imminent
Nanakuli Blackrocks surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Nanakuli Blackrocks sea temperature is
25.3° C
(Which is normal for this time of year)

Nanakuli Blackrocks surf forecast from 27 May 2026:

  • Best quality surf: Tuesday 2 Jun, 8AM (local time) - 3ft (0.9m), 20s period, S swell with offshore winds.
  • Most powerful swell: Tuesday 2 Jun, 8PM (local time) - 4.5ft (1.4m), 18s period, SSW swell with 1,245 kJ wave energy.
  • Next surfable swell (1★+): Thursday 28 May, 2AM (local time) - 2.5ft (0.8m), 13s period with NW swell.

Best Forecast Surf Conditions for Nanakuli Blackrocks this week:

The surf forecast for Nanakuli Blackrocks over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (May 28) at 2AM. The primary swell is predicted to be 0.8m and 13s period with a secondary swell of 0.6m and 13s. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Nanakuli Blackrocks in the next 16 days are 1.4m 18s and forecast to arrive on Tuesday (Jun 02) at 8PM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.6m 6s period and expected on Thursday (May 28) at 5PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 2AM (Thu 28th May)2.5ft (0.8m) 13s
Best Surf 8AM (Tue 2nd Jun)3ft (0.9m) 20s
Most Powerful 8PM (Tue 2nd Jun)4.5ft (1.4m) 18s

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


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Mostly dry. Warm (max 25°C on Wed afternoon, min 23°C on Wed morning). Mainly fresh winds.

Days 4-6 Weather Summary

Mostly dry. Warm (max 26°C on Sat afternoon, min 22°C on Sat night). Wind will be generally light.

Wednesday
27
Thursday
28
Friday
29
Saturday
30
Sunday
31
Monday
1
Tuesday
2
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
2
1
2
2
1
3
2
2
3
3
3
2
2
2
3
3
3
3
4
4
4
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.9
NW
14
0.9
NW
14
0.8
NW
13
0.8
NW
12
0.8
NW
12
0.7
S
21
0.9
S
20
1
S
19
1
S
18
1
S
17
0.9
S
16
0.9
SSW
16
0.8
SSW
15
0.8
SSW
14
0.7
S
19
0.9
S
18
1
S
18
1
S
16
1.2
S
16
1.2
SSW
17
1.2
SSW
18
Wave Graph
Metric surfscale
Energy kJ
341
313
242
175
175
445
618
730
646
589
422
416
296
280
365
515
632
542
752
867
919
Wind (km/h)
20
ENE
25
ENE
20
ENE
20
ENE
30
ENE
20
ENE
25
ENE
25
ENE
20
ENE
15
E
25
ENE
10
ENE
5
SE
0
NNW
10
NE
10
ENE
10
ENE
10
NE
5
E
10
E
10
ENE
off
off
off
off
off
off
off
off
off
off
off
off
glassy
glassy
off
off
off
off
cross-off
cross-off
off
High Tide
2:15PM0.64m
1:11AM0.31m
2:46PM0.68m
1:52AM0.28m
3:18PM0.71m
2:31AM0.26m
3:51PM0.72m
3:07AM0.24m
4:26PM0.72m
3:42AM0.23m
5:03PM0.71m
4:17AM0.22m
5:40PM0.70m
4:58AM0.21m
Low Tide
9:14PM0.24m
7:10AM0.06m
10:02PM0.21m
7:37AM0.05m
10:44PM0.19m
8:06AM0.05m
11:25PM0.17m
8:36AM0.04m
00:07AM0.17m
9:08AM0.05m
00:52AM0.17m
9:41AM0.05m
1:38AM0.17m
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
part cloud
clear
clear
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:50
5:50
5:50
5:50
5:50
5:50
5:48
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:07
7:08
7:08
7:09
7:09
7:09
7:10
Temp °C
24
25
23
24
25
24
25
25
24
25
26
24
25
25
25
25
26
25
26
26
26
22
22
21
23
23
22
23
22
23
24
24
23
27
28
28
27
28
25
29
27
28
Swell 1
Height (m)
Direction
Period (s)
1.2
ENE
7
0.9
NW
14
0.8
NW
13
1.2
E
7
0.8
NW
12
0.7
NW
12
0.9
S
20
1
S
19
1
S
18
1
S
17
0.9
S
16
0.9
SSW
16
0.8
SSW
15
0.8
SSW
14
0.8
SSW
14
0.9
S
18
1
S
18
1
S
16
1.2
S
16
1.2
SSW
17
1.2
SSW
18
Energy kJ
160
313
242
138
175
137
618
730
646
589
422
416
296
280
276
515
632
542
752
867
919
Swell 2
Height (m)
Direction
Period (s)
0.9
NW
14
0.6
S
14
0.6
S
13
0.8
NW
12
0.6
S
12
0.7
S
21
0.7
NW
11
0.6
NNW
11
1
E
7
0.9
E
7
0.7
E
7
0.7
E
8
0.7
E
7
0.7
E
8
0.7
S
19
0.7
E
8
0.7
E
7
0.8
E
7
0.9
S
20
0.9
ENE
7
0.9
SSW
14
Energy kJ
341
129
121
175
103
445
133
84
91
76
52
57
53
57
365
55
54
57
611
77
350
Swell 3
Height (m)
Direction
Period (s)
0.6
S
14
0.4
SE
8
0.3
N
11
0.6
S
12
0.4
S
23
0.5
S
12
0.6
N
10
0.6
N
10
0.6
NNE
9
0.6
NNW
10
0.7
NNW
10
0.7
N
10
0.5
N
9
0.5
N
8
0.7
E
8
0.6
S
14
0.6
N
10
0.7
S
21
0.8
ENE
7
0.8
NNW
11
0.9
NNW
10
Energy kJ
144
17
23
105
167
67
70
67
61
78
100
90
44
28
57
144
67
436
63
164
167
Wind waves
Height (m)
Direction
Period (s)
1.5
ENE
6
1.4
E
7
1.6
ENE
6
1.2
E
7
1.1
E
7
1.2
E
7
1.6
ENE
6
0.8
ENE
7
0.9
ENE
8
0.8
ENE
8
0.9
ENE
8
0.8
ENE
7
Energy kJ
165
187
165
134
111
131
188
59
83
64
81
71
Nearest Offshore or Glassy
Rating
(10 max)
2
2
2
2
2
3
1
1
3
3
3
2
2
2
3
3
3
3
4
4
4
Distance (km)
0
7
0
0
17
0
7
7
0
0
0
0
0
0
0
0
0
0
0
0
0
Best forecast wave conditions in Oahu
Rating
(10 max)
3
3
2
2
2
3
3
3
3
3
3
3
2
2
3
3
3
4
4
4
4
Best forecast wave conditions in United States
Rating
(10 max)
3
3
4
4
4
4
3
3
4
3
3
4
2
2
4
3
4
4
4
4
4
Header Global
Rating
(10 max)
6
9
9
6
5
4
5
5
5
7
7
6
5
4
4
4
5
6
4
4
4
  • 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 Nanakuli Blackrocks Surf forecast

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

Nanakuli Blackrocks is 6 km (4 miles) from Makakilo City. If you plan a vacation in Oahu, look for hotels and other accommodation in Makakilo City. Makakilo City has rooms for a wide range of budgets as well as car hire and transport links.

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