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Nanakuli Blackrocks Surf Forecast
/ HAW – Oahu (122 breaks) / Hawaii (267 breaks) /
Surf Forecasts:
Nanakuli Blackrocks surfForecast / HAW – Oahu / USA
16 Day Weather and Surf, issued 7 am Wednesday 13 May 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
25.5° C
(Which is slightly warmer than usual)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 Thursday (May 14) at 2AM. The primary swell is predicted to be 0.6m and 16s 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 1.2m 14s and forecast to arrive on Thursday (May 14) at 5PM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.7m 7s period and expected on Wednesday (May 13) at 8PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Thu 14th May) | 2ft (0.6m) 16s |
| Best Surf | 5PM (Thu 14th May) | 4ft (1.2m) 14s |
| Most Powerful | 5PM (Thu 14th May) | 4ft (1.2m) 14s |
Table - best surf conditions forecast for Nanakuli Blackrocks over the next 16 days.
Updates in hr min s Forecast update imminent
Short Range ForecastLight rain (total 9mm), mostly falling on Fri night. Warm (max 26°C on Wed afternoon, min 23°C on Wed night). Winds decreasing (fresh winds from the ENE on Wed morning, calm by Fri afternoon). | Days 4-6 Weather SummarySome drizzle, heaviest during Sun afternoon. Warm (max 27°C on Sat afternoon, min 24°C on Sat morning). Wind will be generally light. | ||||||||||||||||||||
Wednesday 13 | Thursday 14 | Friday 15 | Saturday 16 | Sunday 17 | Monday 18 | Tuesday 19 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
S 14 | NNW 9 | NW 16 | NW 15 | NW 14 | NW 13 | NW 12 | NW 12 | NW 11 | SSW 14 | SSW 14 | NNW 10 | SSW 15 | SSW 15 | SSW 14 | SSW 19 | SSW 14 | SSW 14 | SSW 14 | SSW 15 | SSW 15 | |
103 | 82 | 216 | 435 | 614 | 517 | 353 | 209 | 128 | 140 | 140 | 71 | 131 | 249 | 236 | 332 | 213 | 161 | 178 | 249 | 222 | |
Wind (km/h) | |||||||||||||||||||||
off | off | off | off | off | off | cross | glassy | off | off | off | off | glassy | glassy | off | cross-off | off | off | off | off | off | |
High Tide | 2:05PM0.62m | 1:12AM0.39m | 2:43PM0.71m | 1:56AM0.34m | 3:24PM0.78m | 2:40AM0.29m | 4:08PM0.82m | 3:24AM0.25m | 4:54PM0.83m | 4:11AM0.22m | 5:43PM0.81m | 5:06AM0.20m | 6:35PM0.78m | ||||||||
Low Tide | 8:30PM0.23m | 7:24AM0.01m | 9:33PM0.20m | 7:55AM-0.01m | 10:33PM0.17m | 8:28AM-0.03m | 11:34PM0.15m | 9:05AM-0.03m | 00:36AM0.15m | 9:45AM-0.02m | 1:40AM0.14m | 10:27AM0.02m | 2:45AM0.14m | ||||||||
 | |  | | | | |  |  | | | | |  | | |  | | | | | |
 | 5:54 | — | — | 5:54 | — | — | 5:54 | — | — | 5:52 | — | — | 5:52 | — | — | 5:52 | — | — | 5:52 | — | — |
 | — | 7:01 | — | — | 7:02 | — | — | 7:02 | — | — | 7:04 | — | — | 7:04 | — | — | 7:04 | — | — | 7:05 | — |
— | — | — | — | — | — | — | 4 | 5 | — | — | — | — | 1 | — | — | — | — | — | — | — | |
Temp °C | 25 | 26 | 24 | 25 | 26 | 24 | 25 | 24 | 24 | 26 | 27 | 25 | 25 | 26 | 25 | 26 | 26 | 25 | 25 | 26 | 24 |
22 | 23 | 22 | 24 | 24 | 23 | 27 | 26 | 26 | 27 | 28 | 26 | 28 | 29 | 27 | 29 | 28 | 25 | 25 | 24 | 23 | |
Swell 1 Height (m) Direction Period (s) | NNW 9 | NNW 9 | E 7 | NW 15 | NW 14 | NW 13 | NW 12 | NW 12 | E 8 | ENE 8 | ENE 8 | ENE 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 7 | SSW 15 | SSW 15 |
 kJ | 86 | 82 | 279 | 435 | 614 | 517 | 353 | 209 | 105 | 140 | 140 | 119 | 88 | 144 | 144 | 140 | 137 | 186 | 159 | 249 | 222 |
Swell 2 Height (m) Direction Period (s) | S 14 | SSW 14 | N 8 | N 8 | N 8 | E 8 | E 8 | E 8 | NW 11 | NW 11 | NNW 11 | SSE 11 | SSE 11 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | NNW 10 | NNW 11 |
| kJ | 103 | 82 | 63 | 47 | 49 | 95 | 99 | 82 | 128 | 96 | 78 | 71 | 79 | 249 | 236 | 229 | 213 | 161 | 178 | 68 | 101 |
Swell 3 Height (m) Direction Period (s) | SE 9 | SE 9 | NW 16 | SSE 10 | SE 10 | N 8 | SSW 16 | N 8 | N 6 | SSW 14 | SSW 14 | NNW 10 | SSW 15 | NNW 10 | SSE 10 | SSW 19 | SSE 7 | NNW 11 | NW 11 | SSE 9 | SSE 9 |
| kJ | 20 | 19 | 216 | 38 | 24 | 49 | 171 | 46 | 28 | 140 | 140 | 69 | 131 | 56 | 40 | 332 | 35 | 113 | 119 | 58 | 17 |
Wind waves Height (m) Direction Period (s) | E 7 | E 7 | — | E 7 | E 7 | ENE 8 | — | — | — | — | ESE 6 | — | — | — | — | — | — | — | — | E 7 | E 7 |
| kJ | 204 | 193 | — | 155 | 156 | 120 | — | — | — | — | 4 | — | — | — | — | — | — | — | — | 107 | 200 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 8 | 13 | 0 | 0 | 0 | 0 | 25 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7 | 7 |
Best forecast wave conditions in Oahu | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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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.
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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