Surf Forecasts:
Rockpiles surf forecast from 11 Sep 2026:
- Most powerful swell: Thursday 17 Sep, 8PM (local time) - 7ft (2.2m), 10s period, ENE swell with 862 kJ wave energy.
Best Forecast Surf Conditions for Rockpiles this week:
The most powerful waves expected at Rockpiles in the next 16 days are 2.2m 10s and forecast to arrive on Thursday (Sep 17) at 8PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.6m 6s period and expected on Wednesday (Sep 16) at 11AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 8PM (Thu 17th Sep) | 7ft (2.2m) 10s |
Table - best surf conditions forecast for Rockpiles over the next 16 days.
The Lowdown
Alright, Rusty here, let’s break down what’s coming for the next couple of weeks. To be straight with you, the start is dead. For the first week, the waves are small, weak, and just not worth your time. The water temp is about 81°F, which is dead on average for this time of year.
On Friday the 11th, we see a little 4ft east-northeast swell with a 11-second period and a combined energy of 648 (moderate). But the wind is a stiff 25 km/h cross-offshore, and the whole thing just feels off. You’ll be fighting the wind more than catching any clean rides. That continues into Saturday the 12th, with the swell dropping and the period jumping around.
Sunday the 13th and Monday the 14th are just ugly. Swell heights barely hit 2ft, even if the period stretches out to 23 seconds, the combined energy is weak (109 – 276). You’ll be sitting there waiting forever between sets and getting nowhere.
The picture changes, though. On Thursday the 17th, the swell pumps up to 7ft from the ENE, but the period is short at 8 seconds. The combined energy jumps to 1047 (strong to very strong), but that short period with a moderate cross-off wind will make for lumpy, close-out conditions.
Now, here’s your real highlight. Circle Friday the 25th on your calendar. On Thursday the 24th we see a 6ft east swell with a 10-second period and combined energy of 1069, and the wind goes light from the SSE at just 10 km/h in the afternoon. But the real gem is Friday morning the 25th: you get a solid 7ft east swell, 10-second period, combined energy of 1292 (very strong), and *light* winds from the east at only 10 km/h. That’s as clean as it gets for this spot. The waves will have good shape, and the light wind means the surface will be smooth. Sure, the optimum swell direction for Rockpiles is SSE, but the size and cleanliness here are the best you’ll get. Be ready for some company—it’s a popular spot.
After that, Saturday the 26th settles to a 6ft east swell with moderate cross-off winds—still fun, just not the standout.
So, your move: Friday the 25th at Rockpiles. Don’t sleep on it.
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Fri morning, min 24°C on Fri night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 27°C on Tue afternoon, min 25°C on Mon morning). Winds increasing (light winds from the NE on Mon night, fresh winds from the ENE by Wed morning). | ||||||||||||||||||||
Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
Wave Height (m) Direction Period (s) | ENE 11 | ENE 11 | ENE 10 | SW 15 | ENE 10 | ENE 9 | SW 15 | SSW 15 | SW 12 | SW 23 | SW 22 | SW 21 | SW 20 | SW 19 | SSW 19 | SW 18 | SSW 18 | SW 17 | ENE 8 | ENE 10 | ENE 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 387 | 249 | 245 | 242 | 125 | 84 | 107 | 84 | 38 | 86 | 227 | 224 | 392 | 384 | 470 | 455 | 541 | 429 | 629 | 788 | 675 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 4:12PM0.57m | 4:51AM0.54m | 4:42PM0.50m | 5:31AM0.57m | 5:11PM0.43m | 6:14AM0.58m | 5:40PM0.36m | 7:02AM0.58m | 6:07PM0.30m | 7:59AM0.57m | 6:32PM0.25m | 9:10AM0.56m | 7:25PM0.21m | ||||||||
Low Tide | 10:02AM0.10m | 10:33PM0.04m | 10:52AM0.13m | 10:56PM0.05m | 11:45AM0.17m | 11:19PM0.06m | 12:45PM0.20m | 11:42PM0.08m | 2:03PM0.23m | 00:07AM0.11m | 4:06PM0.24m | 00:38AM0.13m | 7:14PM0.21m | 1:26AM0.16m | |||||||
 | |  | | | | | | |  | |  | | | | | | | | | | |
 | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — |
 | — | 6:37 | — | — | 6:37 | — | — | 6:36 | — | — | 6:35 | — | — | 6:34 | — | — | 6:32 | — | — | 6:31 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 25 | 26 | 25 | 26 | 27 | 26 | 26 | 27 | 26 | 26 | 27 | 26 |
Feels °C | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 25 | 25 | 24 | 24 | 24 | 27 | 27 | 25 | 25 | 25 | 25 | 25 | 25 | 25 |
Swell 1 Height (m) Direction Period (s) | ENE 11 | ENE 11 | ENE 10 | SW 15 | ENE 10 | NNE 9 | NNE 9 | NNE 9 | NE 9 | NE 8 | NE 8 | NNE 8 | SW 20 | SW 19 | SSW 19 | SW 18 | SSW 18 | SW 17 | SW 16 | SW 16 | SSW 18 |
| kJ | 387 | 249 | 245 | 242 | 125 | 99 | 99 | 99 | 79 | 74 | 69 | 44 | 392 | 384 | 470 | 455 | 541 | 429 | 258 | 258 | 644 |
Swell 2 Height (m) Direction Period (s) | SW 16 | SW 15 | SW 15 | NE 8 | NE 9 | ENE 9 | SW 15 | SSW 15 | SW 12 | SW 14 | SW 22 | SW 21 | NNE 8 | E 12 | E 11 | SW 12 | SW 11 | E 10 | SSW 20 | SSW 19 | SSE 10 |
| kJ | 261 | 229 | 226 | 74 | 81 | 84 | 107 | 84 | 38 | 49 | 227 | 224 | 50 | 67 | 58 | 35 | 31 | 72 | 149 | 210 | 9 |
Swell 3 Height (m) Direction Period (s) | NNE 8 | NNE 8 | SSW 11 | SW 8 | SW 16 | SSW 13 | ENE 9 | ENE 9 | ENE 8 | SW 23 | SW 14 | SSW 13 | E 12 | SW 12 | SW 12 | WSW 8 | WSW 10 | SSW 11 | SSW 11 | SSE 10 | W 10 |
| kJ | 26 | 39 | 24 | 11 | 124 | 68 | 26 | 25 | 14 | 86 | 49 | 68 | 47 | 38 | 38 | 6 | 9 | 12 | 11 | 10 | 7 |
Wind waves Height (m) Direction Period (s) | — | — | — | ENE 10 | — | — | E 5 | ENE 5 | ENE 4 | ENE 5 | ENE 5 | NE 5 | E 6 | NE 8 | ENE 7 | ENE 6 | ENE 7 | ENE 8 | ENE 8 | ENE 10 | ENE 9 |
| kJ | — | — | — | 160 | — | — | 25 | 17 | 15 | 39 | 24 | 11 | 33 | 99 | 142 | 165 | 249 | 358 | 629 | 788 | 675 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 30 | 1 | 1 | 30 | 1 | 1 | 30 | 1 | 12 | 1 | 30 | 1 | 1 | 30 | 30 | 38 | 127 | 30 | 38 | 44 | 31 |
Best forecast wave conditions in Oahu | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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Information about the Rockpiles Surf forecast
The above surf forecast table for Rockpiles provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Rockpiles can be found by selecting the local surf guide option on the grey menu. Our Rockpiles 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 (Rockpiles) 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 Rockpiles 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.
Rockpiles is 4 km (2 miles) from Honolulu. If you plan a vacation in Oahu, look for hotels and other accommodation in Honolulu. Honolulu has rooms for a wide range of budgets as well as car hire and transport links.
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