Surf Break

Lat Long: 21.37° N 158.14° W

Nanakuli Blackrocks Surf Forecast and Surf Report

Issued: 7 am 31 Oct 2026 (local time)

Forecast update in  hr  min

Today's Nanakuli Blackrocks sea temperature is
26.7°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 31 Oct 2026:

  • Best quality surf: Saturday 31 Oct, 8PM (local time) - 3ft (0.9m), 21s period, NW swell with offshore winds.
  • Most powerful swell: Thursday 5 Nov, 8AM (local time) - 7.5ft (2.3m), 18s period, NNW swell with 3,129 kJ wave energy.
  • Next surfable swell (1★+): Saturday 31 Oct, 2PM (local time) - 3ft (0.9m), 13s 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 Saturday (Oct 31) at 2PM. The primary swell is predicted to be 0.9m and 13s 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 2.3m 18s and forecast to arrive on Thursday (Nov 05) 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 3.0m 8s period and expected on Thursday (Nov 05) at 2PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 2PM (Sat 31st Oct)3ft (0.9m) 13s
Best Surf 8PM (Sat 31st Oct)3ft (0.9m) 21s
Most Powerful 8AM (Thu 5th Nov)7.5ft (2.3m) 18s

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


Short Range Forecast

Moderate rain (total 14mm), heaviest on Sat afternoon. Warm (max 27°C on Sun afternoon, min 24°C on Sun night). Winds increasing (calm on Sat afternoon, fresh winds from the NE by Sun night).

Days 4-6 Weather Summary

Mostly dry. Warm (max 26°C on Wed afternoon, min 24°C on Tue morning). Mainly fresh winds.

Saturday
31
Sunday
1
Monday
2
Tuesday
3
Wednesday
4
Thursday
5
Friday
6
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
2
4
4
2
3
0
3
3
3
2
0
2
2
3
4
3
3
3
3
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
S
13
1.1
S
13
1.6
NW
20
1.9
NW
17
2
NNW
16
1.9
NNW
16
0.6
S
13
2.3
NNW
14
2.1
NNW
13
1.8
NNW
13
1.4
NNW
12
0.4
NW
18
1
NNW
11
1.2
NNW
11
1.7
NNW
19
2.3
NNW
17
2.2
NNW
16
1.8
NW
15
1.7
NNW
14
1.5
NNW
14
1.5
NNW
13
Wave Graph
Metric surfscale
Energy kJ
345
423
1902
2238
2110
1677
119
2137
1535
1144
628
81
278
343
2089
2883
2389
1377
1126
883
796
Wind (km/h)
10
E
5
ENE
5
ENE
15
NE
25
NE
30
NE
30
ENE
30
ENE
30
ENE
35
ENE
35
ENE
30
ENE
30
NE
35
ENE
30
ENE
35
ENE
35
ENE
30
ENE
30
ENE
30
ENE
25
ENE
Wind State
off
off
off
cross-off
cross-off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
off
High Tide
8:20AM0.67m
9:19PM0.19m
9:27AM0.63m
11:23PM0.26m
10:30AM0.59m
00:23AM0.35m
11:25AM0.55m
1:05AM0.45m
12:12PM0.50m
1:42AM0.54m
12:54PM0.45m
2:15AM0.61m
1:32PM0.40m
2:47AM0.67m
Low Tide
5:02PM0.14m
00:50AM0.16m
5:39PM0.12m
2:52AM0.23m
6:07PM0.10m
4:54AM0.26m
6:32PM0.09m
6:26AM0.25m
6:55PM0.07m
7:38AM0.24m
7:16PM0.06m
8:38AM0.22m
7:38PM0.05m
part cloud
thunderstorm
thunderstorm
thunderstorm
rain showers
part cloud
part cloud
clear
clear
part cloud
part cloud
part cloud
part cloud
clear
part cloud
part cloud
clear
clear
clear
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:35
—
—
6:35
—
—
6:35
—
—
6:35
—
—
6:37
—
—
6:37
—
—
6:37
—
—
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
—
5:57
—
—
5:55
—
—
5:54
—
—
5:54
—
—
5:53
—
—
5:53
—
—
5:53
—
 mm
—
5
4
4
1
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Temp °C
26
26
25
26
27
25
25
25
24
25
25
24
25
26
24
26
26
25
26
26
24
Feels °C
29
30
28
27
26
24
22
21
21
22
22
21
22
24
22
23
23
23
24
23
22
  • 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
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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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