Nanakuli Blackrocks surfForecast / HAW – Oahu / USA

information circle16 Day Weather and Surf, issued 7 am Sunday 10 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
25.4° C
(Which is slightly warmer than usual)

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 Sunday (May 10) at 11AM. The primary swell is predicted to be 1.2m and 11s period. 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 1.2m 15s and forecast to arrive on Thursday (May 14) at 5PM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.8m 7s period and expected on Friday (May 15) at 5PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)11AM (Sun 10th May)4ft (1.2m) 11s
Best Surf11AM (Sun 10th May)4ft (1.2m) 11s
Most Powerful 5PM (Thu 14th May)4ft (1.2m) 15s

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 26°C on Sun morning, min 23°C on Sun night). Mainly fresh winds.

Days 4-6 Weather Summary

Mostly dry. Warm (max 26°C on Fri afternoon, min 23°C on Wed night). Mainly fresh winds.

Sunday
10
Monday
11
Tuesday
12
Wednesday
13
Thursday
14
Friday
15
Saturday
16
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
1
1
1
1
1
1
1
0
1
2
2
2
1
1
0
1
1
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.2
NNW
11
1.1
NNW
10
0.9
NNW
12
0.9
NW
11
0.7
NW
11
0.4
SSW
17
0.5
S
16
0.9
NNW
10
0.9
NNW
10
0.5
S
14
0.7
NNW
9
0.6
NW
16
1
NW
15
1.2
NW
15
1.2
NW
13
1
NW
13
0.9
NW
12
0.7
NW
11
0.7
NW
11
0.7
NNW
11
0.6
SSW
15
Wave Graph
Metric surfscale
Energy kJ
337
246
247
172
117
97
129
176
135
103
82
219
441
623
525
311
209
133
123
107
144
Wind (km/h)
20
ENE
25
NE
15
NE
25
ENE
30
ENE
25
ENE
30
ENE
30
ENE
25
ENE
30
ENE
30
ENE
30
ENE
30
ENE
30
ENE
30
ENE
30
ENE
30
ENE
30
ENE
25
ENE
30
ENE
25
ENE
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
High Tide
12:22PM0.33m
10:56PM0.53m
12:55PM0.42m
11:42PM0.49m
1:29PM0.52m
00:28AM0.44m
2:05PM0.62m
1:12AM0.39m
2:43PM0.71m
1:56AM0.34m
3:24PM0.78m
2:40AM0.29m
4:08PM0.82m
3:24AM0.25m
Low Tide
4:16PM0.28m
6:15AM0.10m
6:00PM0.28m
6:35AM0.07m
7:21PM0.26m
6:58AM0.04m
8:30PM0.23m
7:24AM0.01m
9:33PM0.20m
7:55AM-0.01m
10:33PM0.17m
8:28AM-0.03m
11:34PM0.15m
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
part cloud
part cloud
clear
clear
clear
clear
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:56
5:56
5:54
5:54
5:54
5:54
5:52
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:00
7:00
7:01
7:01
7:02
7:02
7:04
Temp °C
26
26
24
25
26
24
25
25
23
25
25
24
25
25
23
25
26
24
25
26
24
25
24
23
23
23
22
22
21
20
22
21
22
22
21
20
22
23
22
22
23
22
Swell 1
Height (m)
Direction
Period (s)
1.2
NNW
11
1.1
NNW
10
0.9
NNW
12
0.9
ESE
6
0.7
NW
11
0.8
N
7
0.7
NNW
11
0.9
NNW
10
0.9
NNW
10
0.7
NNW
9
0.7
NNW
9
0.7
N
8
1
NW
15
1.2
NW
15
1.2
NW
13
1
NW
13
0.9
NW
12
0.7
NW
11
0.7
NW
11
1.2
E
8
0.7
NNW
11
Energy kJ
337
246
247
62
117
60
123
176
135
86
82
60
441
623
525
311
209
133
123
164
99
Swell 2
Height (m)
Direction
Period (s)
0.7
E
6
0.9
E
5
0.7
N
7
0.9
NW
11
0.7
N
7
0.6
NW
11
0.6
N
6
0.5
S
16
0.4
SSE
15
0.5
S
14
0.4
SSW
14
0.6
NW
16
0.7
N
8
0.8
N
8
0.6
N
7
0.6
N
7
0.5
SW
16
0.6
N
7
0.5
SW
15
0.7
NNW
11
0.6
SSW
15
Energy kJ
35
45
43
172
43
92
31
124
73
103
82
219
64
84
33
33
124
33
104
107
144
Swell 3
Height (m)
Direction
Period (s)
0.4
SSW
13
0.4
NW
13
0.4
SE
8
0.7
N
7
0.4
SSW
18
0.4
SSW
17
0.5
S
16
0.4
SE
8
0.3
SSW
15
0.4
SW
15
0.4
SE
8
0.4
SSW
14
0.4
SSW
14
0.4
SE
10
0.5
SW
16
0.5
SW
16
0.4
SE
9
0.4
SSE
10
0.3
SSE
10
0.5
SW
14
0.4
SSE
11
Energy kJ
58
63
18
43
102
97
129
18
42
55
25
81
80
25
132
125
19
43
21
103
49
Wind waves
Height (m)
Direction
Period (s)
0.9
E
6
1.1
ENE
5
0.9
E
5
1.1
E
6
1.1
E
5
1.2
E
7
1.5
E
7
1.3
E
6
1.7
E
7
1.5
E
7
1.7
E
7
1.6
E
7
1.6
E
8
1.5
E
7
1.7
E
7
1.5
E
7
1.8
ENE
7
1.5
E
8
1.6
E
7
1.2
ENE
8
Energy kJ
58
66
47
72
67
134
214
128
295
204
270
276
282
229
311
235
317
248
272
169
Nearest Offshore or Glassy
Rating
(10 max)
2
1
2
1
1
1
1
2
1
1
1
2
3
2
3
2
2
2
2
2
2
Distance (km)
0
159
0
0
159
0
7
13
7
7
17
10
17
159
10
15
13
8
7
10
0
Best forecast wave conditions in Oahu
Rating
(10 max)
2
3
2
2
2
2
1
2
1
2
3
3
3
2
2
2
2
2
Best forecast wave conditions in United States
Rating
(10 max)
2
2
3
3
1
3
2
2
2
2
1
3
3
3
3
3
2
4
2
2
2
Header Global
Rating
(10 max)
6
5
4
5
9
8
9
9
7
9
5
5
6
5
4
5
4
5
4
5
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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