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Nanakuli Blackrocks Surf Forecast
/ HAW – Oahu (122 breaks) / Hawaii (267 breaks) /
Surf Forecasts:
Nanakuli Blackrocks surfForecast / HAW – Oahu / USA
48hr Weather and Surf, issued 7 pm Sunday 19 Apr 2026 HSTForecast 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
24.8° C
(Which is normal for this time of year)How big are the waves at Nanakuli Blackrocks today?
The current surf forecast for Nanakuli Blackrocks at 1AM is: 0.5m 14s primary swell from a West direction (forecast issued at 07:00pm April 19). An open ocean swell of 0.5m 6s is not directed at the surf break. The wind direction is predicted to be offshore.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 Apr) | 1.5ft (0.5m) | 14s |
| Afternoon (20 Apr) | 2ft (0.6m) | 13s |
| Evening (20 Apr) | 1.5ft (0.5m) | 14s |
Table - waves today at Nanakuli Blackrocks. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | |||||||||||||||||||||
| 5 PM | 8 PM | 11 PM | 2 AM | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | 2 AM | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | 2 AM | 5 AM | 8 AM | 11 AM | 2 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 13 | 13 | 13 | 14 | 12 | 14 | 13 | 13 | 14 | 14 | 13 | 14 | 15 | 16 | 15 | 16 | 16 | 14 | 14 | 14 | 14 | 14 | 14 | 13 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 84 | 85 | 127 | 93 | 75 | 96 | 121 | 121 | 103 | 103 | 123 | 129 | 213 | 179 | 172 | 237 | 306 | 268 | 268 | 264 | 412 | 463 | 424 | 406 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | glass | cross | cross- off | off | off | off | cross | glass | glass | cross- off | cross- off | glass | glass | glass | glass | cross- on | cross | cross- off | cross- off | off | off | off | glass | glass |
High Tide / height (m) | 5:54PM 0.76 | 4:56AM 0.24 | 6:49PM 0.74 | 5:39AM 0.20 | 7:51PM 0.70 | 7:11AM 0.18 | ||||||||||||||||||
Low Tide / height (m) | 1:32AM 0.19 | 10:44AM 0.02 | 3:09AM 0.19 | 11:22AM 0.06 | 4:53AM 0.17 | 12:10PM 0.11 | ||||||||||||||||||
Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | 6:09 | - | - | - | - | - | - | - | 6:07 | - | - | - | - | - | - | - | 6:07 | - | - |
| Sunset | 6:52 | - | - | - | - | - | - | - | 6:52 | - | - | - | - | - | - | - | 6:53 | - | - | - | - | - | - | - |
 |  |  | | |  | |  | | | | | | | | | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 25 | 24 | 24 | 24 | 23 | 24 | 25 | 24 | 24 | 24 | 23 | 23 | 23 | 23 | 24 | 24 | 24 | 24 | 24 | 23 | 23 | 23 | 25 | 25 |
| Feels °C (?) | 29 | 27 | 27 | 27 | 25 | 26 | 28 | 27 | 27 | 27 | 26 | 26 | 27 | 26 | 27 | 26 | 26 | 26 | 26 | 25 | 26 | 25 | 28 | 28 |
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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.
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