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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 Saturday 16 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
25.4° C
(Which is normal for this time of year)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 (May 16) at 2PM. The primary swell is predicted to be 0.6m and 15s period with a secondary swell of 0.6m and 11s. 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 0.9m 18s and forecast to arrive on Tuesday (May 19) at 5AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.4m 8s period and expected on Thursday (May 21) at 11PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2PM (Sat 16th May) | 2ft (0.6m) 15s |
| Best Surf | 11AM (Mon 18th May) | 2.5ft (0.7m) 19s |
| Most Powerful | 5AM (Tue 19th May) | 3ft (0.9m) 18s |
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 3mm), mostly falling on Sat afternoon. Warm (max 27°C on Sun afternoon, min 24°C on Sat morning). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 26°C on Tue afternoon, min 22°C on Thu night). Mainly fresh winds. | ||||||||||||||||||||
Saturday 16 | Sunday 17 | Monday 18 | Tuesday 19 | Wednesday 20 | Thursday 21 | Friday 22 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
SSW 15 | SSW 14 | SSE 10 | SSE 11 | SSW 15 | SSW 14 | SSW 19 | SSW 14 | SSW 14 | SSW 14 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 17 | S 16 | S 16 | S 15 | S 18 | S 18 | S 16 | |
152 | 140 | 208 | 78 | 249 | 236 | 332 | 213 | 161 | 229 | 246 | 252 | 163 | 149 | 101 | 134 | 126 | 157 | 107 | 152 | 188 | |
Wind (km/h) | |||||||||||||||||||||
cross-off | glassy | cross-off | off | off | off | off | off | off | off | off | off | off | off | off | off | off | off | off | off | off | |
High Tide | 4:08PM0.82m | 3:24AM0.25m | 4:54PM0.83m | 4:11AM0.22m | 5:43PM0.81m | 5:06AM0.20m | 6:35PM0.78m | 6:18AM0.19m | 7:28PM0.72m | 8:01AM0.20m | 8:22PM0.66m | 10:01AM0.25m | 9:15PM0.60m | ||||||||
Low Tide | 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 | 11:14AM0.07m | 3:42AM0.13m | 12:10PM0.14m | 4:27AM0.12m | 1:30PM0.22m | ||||||||
 |  |  | | |  |  | | | | |  | | | | | | | | | | |
 | 5:52 | — | — | 5:52 | — | — | 5:52 | — | — | 5:52 | — | — | 5:52 | — | — | 5:52 | — | — | 5:50 | — | — |
 | — | 7:04 | — | — | 7:04 | — | — | 7:04 | — | — | 7:05 | — | — | 7:05 | — | — | 7:06 | — | — | 7:06 | — |
— | 2 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 25 | 26 | 25 | 26 | 27 | 25 | 25 | 26 | 24 | 25 | 26 | 24 | 25 | 25 | 24 | 24 | 25 | 23 | 24 | 25 | 23 |
28 | 30 | 27 | 25 | 26 | 25 | 25 | 25 | 23 | 24 | 24 | 22 | 23 | 22 | 21 | 21 | 21 | 19 | 20 | 21 | 20 | |
Swell 1 Height (m) Direction Period (s) | E 8 | ENE 8 | E 8 | E 8 | E 8 | E 8 | ENE 8 | SSW 14 | E 8 | E 8 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 13 | E 8 | S 16 | S 15 | S 14 | S 14 | N 7 |
 kJ | 181 | 167 | 137 | 140 | 140 | 140 | 202 | 213 | 161 | 153 | 246 | 252 | 163 | 149 | 101 | 422 | 126 | 157 | 107 | 94 | 43 |
Swell 2 Height (m) Direction Period (s) | NW 11 | NNW 11 | SSE 10 | SSE 8 | SSW 15 | SSW 14 | SSW 14 | SSE 7 | SSW 14 | SSW 14 | SSE 7 | NNW 11 | NNW 10 | NNW 11 | NNW 10 | S 16 | NW 10 | SE 13 | SSE 12 | S 18 | S 16 |
| kJ | 96 | 78 | 208 | 76 | 249 | 236 | 229 | 19 | 161 | 229 | 19 | 75 | 69 | 64 | 40 | 134 | 24 | 41 | 57 | 152 | 188 |
Swell 3 Height (m) Direction Period (s) | SSW 15 | SSW 14 | NNW 10 | SSE 11 | SSE 7 | SSE 7 | SSW 19 | SE 10 | SSW 17 | SSW 18 | NW 10 | SSE 9 | SSW 18 | S 18 | SSW 17 | SSW 14 | SE 13 | NNW 9 | S 18 | NNW 11 | S 13 |
| kJ | 152 | 140 | 69 | 78 | 48 | 29 | 332 | 25 | 94 | 207 | 54 | 33 | 63 | 56 | 92 | 73 | 44 | 17 | 101 | 47 | 90 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | ENE 8 | ENE 8 | — | ENE 8 | — | — | E 8 | E 8 | E 8 | E 8 | E 8 | — | E 8 | E 8 | ENE 8 | ENE 8 | E 8 |
| kJ | — | — | — | — | 128 | 157 | — | 229 | — | — | 217 | 245 | 378 | 430 | 520 | — | 559 | 675 | 471 | 654 | 386 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7 | 0 | 7 | 7 | 7 | 13 | 16 | 159 | 159 | 161 | 15 | 159 | 159 | 17 |
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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