Nanakuli Blackrocks surfForecast / HAW – Oahu / USA

information circle16 Day Weather and Surf, issued 7 am Friday 08 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
25.5° 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 Friday (May 08) at 2PM. The primary swell is predicted to be 1.4m and 12s period. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Nanakuli Blackrocks in the next 16 days are 1.4m 12s and forecast to arrive on Friday (May 08) at 2PM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.0m 7s period and expected on Wednesday (May 13) at 8PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 2PM (Fri 8th May)4.5ft (1.4m) 12s
Best Surf 2PM (Fri 8th May)4.5ft (1.4m) 12s
Most Powerful 2PM (Fri 8th May)4.5ft (1.4m) 12s

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


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Some drizzle, heaviest during Sat afternoon. Warm (max 26°C on Sat afternoon, min 23°C on Fri morning). Wind will be generally light.

Days 4-6 Weather Summary

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

Friday
8
Saturday
9
Sunday
10
Monday
11
Tuesday
12
Wednesday
13
Thursday
14
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
3
3
2
1
1
2
2
2
2
2
1
1
0
1
2
0
0
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)
1.4
NW
12
1.4
NW
12
1.1
NW
12
0.9
NW
11
0.6
NW
11
0.8
NNW
11
0.9
NNW
11
1.1
NNW
10
1.1
NNW
12
1
NNW
11
1
NNW
11
0.4
SSW
17
0.5
SSW
16
0.8
NNW
10
0.8
NNW
10
0.5
S
14
0.4
SSW
14
0.4
NW
16
0.7
NW
15
0.9
NW
15
1
NW
14
Wave Graph
Metric surfscale
Energy kJ
607
514
303
172
94
154
207
246
341
226
218
97
144
124
123
103
82
81
223
340
373
Wind (km/h)
5
E
5
NNE
15
NE
15
NE
20
NE
15
NE
15
ENE
25
ENE
20
NE
25
ENE
25
ENE
25
ENE
25
ENE
30
ENE
25
ENE
30
ENE
35
ENE
30
ENE
30
ENE
30
ENE
25
ENE
glassy
glassy
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
High Tide
9:40AM0.20m
9:16PM0.58m
11:40AM0.25m
10:07PM0.56m
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
Low Tide
12:04PM0.19m
5:41AM0.15m
5:57AM0.12m
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
clear
part cloud
part cloud
part cloud
thunderstorm
part cloud
part cloud
clear
part cloud
clear
clear
part cloud
clear
clear
part cloud
part cloud
clear
part cloud
part cloud
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:56
5:56
5:56
5:56
5:54
5:54
5:54
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:00
7:00
7:00
7:00
7:01
7:01
7:02
1
Temp °C
25
25
24
25
26
24
26
26
24
25
26
24
25
26
24
23
25
24
24
25
24
27
28
24
25
26
24
26
25
22
23
23
22
23
23
22
20
22
21
21
22
23
Swell 1
Height (m)
Direction
Period (s)
1.4
NW
12
1.4
NW
12
1.1
NW
12
0.9
NW
11
0.9
N
6
0.9
NNE
6
0.9
NNW
11
1.1
NNW
10
1.1
NNW
12
1
NNW
11
1
NNW
11
0.8
N
7
0.8
N
7
0.8
NNW
10
0.8
NNW
10
0.7
N
7
0.4
SSW
14
1
N
8
0.7
NW
15
0.9
N
9
1
NW
14
Energy kJ
607
514
303
172
68
68
207
246
341
226
218
61
58
114
123
45
82
137
223
125
373
Swell 2
Height (m)
Direction
Period (s)
0.5
S
17
0.5
E
8
0.5
S
16
0.6
E
5
0.6
NW
11
0.8
NNW
11
0.7
N
6
0.6
E
5
0.4
SE
9
0.4
SSW
18
0.4
SSW
18
0.6
NW
11
0.5
SSW
16
0.5
S
16
0.4
SSE
15
0.6
NNW
9
0.4
NW
9
0.4
SSW
14
0.6
N
9
0.9
NW
15
0.5
SW
16
Energy kJ
151
28
129
20
94
154
40
21
19
104
102
90
144
124
73
55
21
81
56
340
132
Swell 3
Height (m)
Direction
Period (s)
0.5
E
8
0.4
SSW
17
0.5
E
5
0.5
N
6
0.4
SSW
15
0.4
SSW
14
0.5
E
5
0.4
NW
13
0.3
SSW
13
0.2
SSW
10
0.4
SE
9
0.4
SSW
17
0.5
N
11
0.2
S
11
0.4
SW
16
0.5
S
14
0.4
SE
8
0.4
NW
16
0.4
SSW
14
0.4
SE
10
0.4
SE
9
Energy kJ
28
99
12
19
71
69
14
63
33
10
19
97
63
10
65
103
18
68
78
24
21
Wind waves
Height (m)
Direction
Period (s)
0.5
E
4
0.9
ENE
5
0.8
ENE
6
0.8
ENE
6
0.9
E
6
1.1
E
6
1.3
E
6
1.1
E
7
1.4
E
7
1.7
E
7
1.7
E
7
1.4
E
7
1.9
ENE
7
1.6
E
7
1.8
ENE
7
1.9
ENE
7
1.9
ENE
8
Energy kJ
9
40
42
37
50
92
120
103
181
266
298
183
366
272
340
365
385
Nearest Offshore or Glassy
Rating
(10 max)
3
3
2
1
1
2
2
2
2
2
2
1
2
1
2
1
2
1
1
1
3
Distance (km)
0
0
0
0
0
0
0
0
0
0
10
0
2
10
0
161
169
159
169
159
7
Best forecast wave conditions in Oahu
Rating
(10 max)
3
3
3
2
2
2
2
2
3
2
2
2
2
2
2
3
Best forecast wave conditions in United States
Rating
(10 max)
3
3
4
2
2
4
2
2
3
3
2
3
3
3
3
2
2
3
2
2
4
Header Global
Rating
(10 max)
5
5
4
5
4
9
6
4
4
9
5
9
9
5
8
7
6
5
5
5
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 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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