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Surf Forecasts:

Nanakuli Blackrocks surfForecast / HAW – Oahu / USA

information circle48hr Weather and Surf, issued 1 am Friday 16 Jan 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
25.2° C
 (Which is slightly warmer than usual)

How big are the waves at Nanakuli Blackrocks today?

The current surf forecast for Nanakuli Blackrocks at 3AM is: 4.0m 15s primary swell from a North-northwest direction (forecast issued at 01:00am January 16). An open ocean swell of 0.3m 8s is not directed at the surf break, a second open ocean swell of 0.8m 4s is not directed at the surf break. The wind direction is predicted to be cross-offshore and the swell rating is 11.

Time (HST) & DateWave HeightWave Period
Morning (16 Jan)11ft (3.5m)14s
Afternoon (16 Jan)10ft (3.0m)14s
Evening (16 Jan)10ft (3.0m)13s

Table - waves today at Nanakuli Blackrocks. (Swell directed towards the surf break)

Updates in  hr  min  s Forecast update imminent 
12 DaysHourly
Print Table
Friday
16
Saturday
17
Sunday
18
11 PM2 AM5 AM8 AM11 AM2 PM5 PM8 PM11 PM2 AM5 AM8 AM11 AM2 PM5 PM8 PM11 PM2 AM5 AM8 AM11 AM2 PM5 PM8 PM
Rating
(10 max)
!
!
!
!
!
!
!
!
4
4
4
2
1
1
1
0
0
1
2
4
3
4
3
4
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
4
NNW
4
NNW
4
NNW
3.5
NNW
3.5
NNW
3.5
NNW
3
NNW
3
NNW
2.5
NNW
2.4
NNW
2.4
NNW
0.9
WNW
0.9
NW
0.9
NW
0.9
NW
0.7
NW
0.7
NW
0.7
NW
0.6
NNW
1.6
NW
2.1
NW
2.3
NW
2.2
NW
2.2
NW
Period(s) (?)151514141414131313131214131313131313211918171616
Wave
Graph
(?)Metric surfscale
Energy kJ (?)7842639558705225481239753257280125101905173132825725325317517517029117452552298124042374
Wind
(km/h)
30
NNE
25
NNE
25
NE
25
NE
30
NE
30
NE
25
NE
20
NE
20
NE
20
NE
25
NE
25
ENE
25
E
30
ENE
30
ENE
25
ENE
25
ENE
30
E
25
E
25
E
25
ESE
10
ESE
15
E
15
E
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off		cross-
off		cross-
off		offoffoffoffoffoffoffoffoffoffoffoffoffoffoffoffoffcross-
off		cross-
off		cross-
off		off
High Tide
/ height (m)
3:02AM
0.72
2:19PM
0.23
3:35AM
0.74
2:58PM
0.24
4:06AM
0.75
3:36PM
0.25
Low Tide
/ height (m)
10:40AM
0.16
7:47PM
0.03
11:03AM
0.15
8:25PM
0.02
11:27AM
0.14
Friday
16
Saturday
17
Sunday
18
Sunrise---7:11-------7:11-------7:11----
Sunset------6:10-------6:12-------6:13-
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
part cloud
cloud
part cloud
part cloud
Rain (mm)
------------------------
Temp. °C202020202122212020202121222323222222222223232323
Feels °C (?)151515151617161717161717171818171717181819212021
  • 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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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.

View detailed surf forecast for Nanakuli Blackrocks at:
surf-forecast.com

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