Surf Break

Lat Long: 21.37° N 158.14° W

Nanakuli Blackrocks Surf Forecast and Surf Report

Issued: 1 am 07 Oct 2026 (local time)

Forecast update in  hr  min

Today's Nanakuli Blackrocks sea temperature is
27.1°C
0.1° 

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


Nanakuli Blackrocks surf forecast from 7 Oct 2026:

  • Best quality surf: Wednesday 7 Oct, 11PM (local time) - 4ft (1.2m), 13s period, NNW swell with cross-offshore winds.
  • Most powerful swell: Tuesday 13 Oct, 2AM (local time) - 4.5ft (1.3m), 16s period, NW swell with 793 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 7 Oct, 11PM (local time) - 4ft (1.2m), 13s period with NNW 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 Wednesday (Oct 07) at 11PM. The primary swell is predicted to be 1.2m and 13s period with a secondary swell of 0.9m and 14s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Nanakuli Blackrocks in the next 16 days are 1.3m 16s and forecast to arrive on Tuesday (Oct 13) at 2AM. 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 8s period and expected on Tuesday (Oct 13) at 2AM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)11PM (Wed 7th Oct)4ft (1.2m) 13s
Best Surf11PM (Wed 7th Oct)4ft (1.2m) 13s
Most Powerful 2AM (Tue 13th Oct)4.5ft (1.3m) 16s

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


Short Range Forecast

Moderate rain (total 15mm), heaviest on Wed night. Warm (max 28°C on Fri afternoon, min 25°C on Wed morning). Wind will be generally light.

Days 4-6 Weather Summary

Mostly dry. Warm (max 28°C on Mon afternoon, min 24°C on Sat night). Wind will be generally light.

Wednesday
7
Thursday
8
Friday
9
Saturday
10
Sunday
11
Monday
12
Tuesday
13
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
3
3
1
1
1
2
4
3
4
3
3
2
2
3
3
3
3
3
3
3
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
15
1.2
NNW
14
1.2
NNW
13
0.8
W
15
0.8
W
15
0.8
SSW
18
1
S
17
1
S
16
1.3
NNW
11
0.9
S
20
0.8
S
19
1
S
18
0.7
S
18
0.8
S
16
1
S
16
0.9
NW
18
1.1
NW
16
1.3
NW
16
1.3
NW
15
1.3
NW
14
1.2
NW
14
Wave Graph
Metric surfscale
Energy kJ
568
486
451
291
272
413
596
535
352
611
472
614
294
325
507
444
589
793
695
667
540
Wind (km/h)
20
S
15
S
15
SSE
25
S
20
S
20
SSE
15
SSE
10
SE
15
ENE
20
E
20
ENE
15
ENE
10
E
15
E
10
NNE
10
ENE
15
NE
10
ENE
15
E
10
E
10
E
Wind State
cross
cross
cross
cross
cross
cross
cross
cross-off
off
off
off
off
off
off
cross-off
off
off
off
cross-off
cross-off
off
High Tide
1:40PM0.59m
2:28AM0.50m
2:14PM0.54m
3:03AM0.57m
2:46PM0.49m
3:37AM0.63m
3:15PM0.43m
4:11AM0.66m
3:42PM0.38m
4:46AM0.68m
4:08PM0.33m
5:22AM0.67m
4:30PM0.28m
Low Tide
8:15PM0.08m
8:16AM0.16m
8:35PM0.06m
9:08AM0.16m
8:54PM0.06m
9:58AM0.17m
9:14PM0.05m
10:48AM0.18m
9:34PM0.05m
11:39AM0.20m
9:55PM0.06m
12:36PM0.21m
10:17PM0.08m
part cloud
clear
rain showers
thunderstorm
thunderstorm
thunderstorm
thunderstorm
part cloud
clear
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
rain showers
thunderstorm
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:24
—
—
6:24
—
—
6:26
—
—
6:26
—
—
6:26
—
—
6:26
—
—
6:26
—
—
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
—
6:14
—
—
6:14
—
—
6:13
—
—
6:12
—
—
6:10
—
—
6:09
—
—
6:08
—
 mm
—
—
5
2
2
4
2
—
—
—
—
—
—
—
—
—
—
—
1
2
4
Temp °C
26
26
26
27
27
26
27
28
26
26
27
25
26
27
25
27
28
26
27
27
25
Feels °C
26
26
28
26
27
28
29
30
29
28
27
25
27
27
25
29
29
28
29
29
27
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder
How to use the Wavefinder 
submit an eyeball surf report

Quick surf report for Nanakuli Blackrocks:

join our community of surf reporters

FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Nanakuli Blackrocks surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.


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.

Nearest locationNearest