Nanakuli Blackrocks surfForecast / HAW – Oahu / USA

information circle16 Day Weather and Surf, issued 7 pm Sunday 26 Apr 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
25.0° C
(Which is normal for this time of year)

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 Monday (Apr 27) at 2AM. The primary swell is predicted to be 0.8m 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 1.4m 14s and forecast to arrive on Saturday (May 02) at 8AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.5m 8s period and expected on Saturday (May 02) at 8PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 2AM (Mon 27th Apr)2.5ft (0.8m) 11s
Best Surf11PM (Fri 1st May)3.5ft (1.1m) 16s
Most Powerful 8AM (Sat 2nd May)4.5ft (1.4m) 14s

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


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Light rain (total 3mm), mostly falling on Mon afternoon. Warm (max 26°C on Mon afternoon, min 23°C on Sun night). Wind will be generally light.

Days 5-7 Weather Summary

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

Monday
27
Tuesday
28
Wednesday
29
Thursday
30
Friday
1
Saturday
2
Sun
3
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Rating
(10 max)
2
1
1
1
1
1
1
2
0
2
2
1
2
3
2
3
3
2
2
2
1
Swell
Height Map
<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
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<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
Wave
Height (m)
Direction
Period (s)
0.8
NNW
11
0.6
SSW
13
0.6
SSW
13
0.5
SW
13
0.5
SW
12
0.4
NW
13
0.6
NW
13
0.7
NW
14
0.7
NW
13
0.9
NW
12
1
NNW
12
1.1
NNW
11
1.1
NNW
13
1.1
NNW
12
0.8
NW
18
1.2
NW
16
1.4
NW
14
1.1
NW
13
1
NW
12
1.1
NW
12
1
NW
13
Wave Graph
Metric surfscale
Energy kJ
151
119
114
83
73
63
132
203
183
223
289
319
408
347
388
739
742
444
301
353
321
Wind (km/h)
15
ENE
15
E
15
E
15
ENE
15
E
20
ENE
20
ENE
20
ENE
25
NE
20
ENE
25
ENE
25
ENE
20
ENE
20
ENE
25
ENE
20
ENE
25
ENE
30
ENE
15
ENE
15
NE
25
NE
off
cross-off
cross-off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
cross-off
cross-off
High Tide
00:45AM0.52m
2:03PM0.51m
1:22AM0.47m
2:35PM0.58m
1:57AM0.42m
3:05PM0.64m
2:29AM0.38m
3:35PM0.68m
2:59AM0.33m
4:07PM0.70m
3:29AM0.30m
4:40PM0.70m
3:57AM0.26m
5:16PM0.69m
Low Tide
7:26AM0.08m
7:53PM0.23m
7:45AM0.07m
8:49PM0.21m
8:04AM0.06m
9:39PM0.20m
8:24AM0.06m
10:27PM0.19m
8:45AM0.05m
11:14PM0.18m
9:07AM0.05m
00:02AM0.19m
9:32AM0.06m
clear
clear
light rain
clear
clear
rain showers
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:03
6:03
6:03
6:01
6:01
6:01
6:00
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:54
6:55
6:55
6:57
6:57
6:57
6:58
6:58
1
2
Temp °C
24
25
26
24
25
26
24
25
26
23
25
25
23
25
25
24
25
26
23
25
25
23
25
26
23
25
25
23
23
24
21
23
22
21
23
22
22
23
24
21
25
24
Swell 1
Height (m)
Direction
Period (s)
0.8
NNW
11
0.8
ENE
8
0.9
ENE
7
0.9
ENE
7
0.8
ENE
7
0.7
ENE
7
0.6
NW
13
1
E
7
1
E
7
0.9
NW
12
1
NNW
12
1.1
NNW
11
1.1
ENE
7
1.1
NNW
12
1
NNW
12
1.4
E
7
1.4
NW
14
1.1
NW
13
1.2
ENE
8
1.2
E
8
1
NW
13
Energy kJ
151
72
86
74
62
49
132
103
92
223
289
319
125
347
252
206
742
444
187
186
321
Swell 2
Height (m)
Direction
Period (s)
0.7
NE
8
0.7
NW
11
0.6
NW
10
0.6
NNW
10
0.5
NW
10
0.4
NW
13
0.4
SW
12
0.7
NW
14
0.7
NW
13
0.4
SE
10
0.9
E
6
0.5
S
16
1.1
NNW
13
0.5
S
15
0.8
NW
18
1.2
NW
16
1.1
E
8
0.5
S
14
1
NW
12
1.1
NW
12
0.6
SSW
14
Energy kJ
62
119
89
69
50
63
36
203
183
25
68
127
408
110
388
739
135
106
301
353
165
Swell 3
Height (m)
Direction
Period (s)
0.6
SW
14
0.6
SSW
13
0.6
SSW
13
0.5
SW
13
0.5
SW
12
0.4
NNW
10
0.2
SSE
11
0.4
SW
12
0.4
SE
10
0.4
N
4
0.3
S
16
0.3
SSW
12
0.4
SSW
15
0.3
NW
20
0.5
S
16
0.9
NNW
12
0.6
S
14
0.4
SSW
18
0.5
SSW
16
0.6
S
13
0.2
SSE
10
Energy kJ
151
116
114
83
73
38
12
35
26
5
47
28
77
60
129
193
148
102
147
130
10
Wind waves
Height (m)
Direction
Period (s)
0.6
E
5
0.9
ENE
7
0.8
E
7
1.1
ENE
5
1.1
E
7
1.1
E
8
1.4
ENE
5
1.5
ENE
8
1.2
E
8
Energy kJ
15
86
56
54
127
142
98
246
190
Nearest Offshore or Glassy
Rating
(10 max)
2
2
2
1
1
1
1
2
1
2
2
1
2
3
3
3
3
2
2
2
3
Distance (km)
0
1
7
0
0
0
0
0
159
0
0
151
0
0
7
0
0
159
0
0
1
Best forecast wave conditions in Oahu
Rating
(10 max)
2
2
2
1
1
2
2
2
2
2
2
3
3
4
4
2
3
3
Best forecast wave conditions in United States
Rating
(10 max)
2
3
2
2
1
2
3
2
1
3
2
1
3
3
3
4
4
2
2
3
3
Header Global
Rating
(10 max)
6
6
5
5
5
9
7
8
6
5
4
5
8
6
5
4
4
4
4
4
5
  • 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 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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