Surf Break

Lat Long: 21.37° N 158.14° W

Nanakuli Blackrocks Surf Forecast and Surf Report

Issued: 1 pm 03 Oct 2026 (local time)

Forecast update in  hr  min

Today's Nanakuli Blackrocks sea temperature is
27.2°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 4 Oct 2026:

  • Best quality surf: Monday 5 Oct, 11AM (local time) - 3ft (0.9m), 17s period, SSW swell with offshore winds.
  • Most powerful swell: Saturday 10 Oct, 2PM (local time) - 3.5ft (1.0m), 20s period, S swell with 746 kJ wave energy.
  • Next surfable swell (1★+): Sunday 4 Oct, 2AM (local time) - 2ft (0.6m), 12s period with S 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 Sunday (Oct 04) at 2AM. The primary swell is predicted to be 0.6m and 12s 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 1.0m 20s and forecast to arrive on Saturday (Oct 10) at 2PM. 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 6s period and expected on Sunday (Oct 04) at 5PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 2AM (Sun 4th Oct)2ft (0.6m) 12s
Best Surf11AM (Mon 5th Oct)3ft (0.9m) 17s
Most Powerful 2PM (Sat 10th Oct)3.5ft (1.0m) 20s

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


Short Range Forecast

Mostly dry. Warm (max 28°C on Sat afternoon, min 24°C on Sat night). Winds decreasing (fresh winds from the NE on Sun afternoon, calm by Tue morning).

Days 5-7 Weather Summary

Light rain (total 5mm), mostly falling on Tue afternoon. Warm (max 27°C on Thu morning, min 24°C on Tue night). Wind will be generally light.

Sat
3
Sunday
4
Monday
5
Tuesday
6
Wednesday
7
Thursday
8
Friday
9
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
1
2
1
2
3
3
3
3
3
3
2
0
2
2
2
3
3
2
3
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.7
SSW
12
0.6
S
12
0.4
SSW
20
0.6
SSW
19
0.8
SSW
18
0.9
SSW
17
0.9
SSW
17
0.9
SSW
16
0.9
SSW
16
0.9
SSW
15
0.9
NNW
16
1.2
NNW
15
1.1
NW
14
1.1
NW
13
0.8
W
15
0.8
W
15
0.8
SSW
18
0.9
SSW
17
0.9
SSW
16
0.8
SSW
16
Wave Graph
Metric surfscale
Energy kJ
140
99
128
283
427
499
459
452
429
392
452
568
418
388
294
279
408
487
437
329
Wind (km/h)
20
ENE
25
NE
25
ENE
30
NE
20
ENE
20
ENE
25
NE
10
ENE
5
ESE
5
SE
5
SE
20
SSE
20
S
15
SE
25
SE
20
SE
10
E
25
E
25
ENE
25
ENE
Wind State
off
off
off
off
off
off
off
off
cross-off
cross-off
cross-off
cross
cross-on
cross-off
cross-off
cross-off
cross-off
off
off
off
High Tide
11:00PM0.20m
11:21AM0.64m
00:23AM0.26m
12:16PM0.64m
1:11AM0.34m
1:01PM0.62m
1:51AM0.42m
1:40PM0.59m
2:28AM0.50m
2:14PM0.54m
3:03AM0.57m
2:46PM0.49m
3:37AM0.63m
Low Tide
6:58PM0.16m
2:56AM0.16m
7:15PM0.13m
4:49AM0.17m
7:35PM0.11m
6:13AM0.17m
7:55PM0.09m
7:18AM0.16m
8:15PM0.08m
8:16AM0.16m
8:35PM0.06m
9:08AM0.16m
8:54PM0.06m
clear
clear
clear
part cloud
part cloud
clear
clear
clear
clear
rain showers
rain showers
rain showers
rain showers
clear
part cloud
thunderstorm
clear
clear
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
—
—
6:24
—
—
6:24
—
—
6:24
—
—
6:24
—
—
6:24
—
—
6:26
—
—
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:17
—
—
6:16
—
—
6:15
—
—
6:15
—
—
6:14
—
—
6:14
—
—
6:13
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 mm
—
—
—
—
—
—
—
—
—
1
1
1
1
—
—
1
—
—
—
—
Temp °C
28
25
27
26
25
26
27
25
26
26
25
25
26
26
27
27
27
27
27
25
Feels °C
28
24
25
24
23
25
27
25
28
28
27
26
26
27
26
26
29
27
26
24
  • 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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