Surf Forecasts:
Rockpiles surf forecast from 12 Sep 2026:
- Best quality surf: Saturday 12 Sep, 5AM (local time) - 2.5ft (0.7m), 15s period, SW swell with cross-offshore winds.
- Most powerful swell: Thursday 17 Sep, 8PM (local time) - 7ft (2.1m), 10s period, ENE swell with 804 kJ wave energy.
- Next surfable swell (1★+): Saturday 12 Sep, 5AM (local time) - 2.5ft (0.7m), 15s period with SW swell.
Best Forecast Surf Conditions for Rockpiles this week:
The surf forecast for Rockpiles over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Sep 12) at 5AM. The primary swell is predicted to be 0.7m and 15s period with a secondary swell of 0.9m and 10s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Rockpiles in the next 16 days are 2.1m 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 1.4m 6s period and expected on Wednesday (Sep 16) at 2PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Sat 12th Sep) | 2.5ft (0.7m) 15s |
| Best Surf | 5AM (Sat 12th Sep) | 2.5ft (0.7m) 15s |
| Most Powerful | 8PM (Thu 17th Sep) | 7ft (2.1m) 10s |
Table - best surf conditions forecast for Rockpiles over the next 16 days.
The Lowdown
G'day, I'm Rusty. Let's have a look at what's cookin' at Rockpiles over the next couple of weeks. It's a reef break that's fairly consistent and exposed to swell, with an optimum direction from the SSE. The water temp is about average for this time of year, so nothing too crazy there.
Right, to be straight up with you, the first week is looking pretty average. We've got a real slow start from Saturday the 12th through to the following Saturday the 19th. There are waves, but they're small and the conditions are just ordinary. Swell heights are mostly under 3.3 ft, coming from the SW with long periods around 15 to 16 seconds, which is good for a point or reef, but the energy is moderate at best (around 222 to 935). The wind is a steady cross-off from the ENE, which is okay, but the wave comment keeps saying "marginal surf forecast" or "poor surf conditions". Basically, it's not worth paddling out for anything special.
Then we hit a bit of a junky period from Thursday the 17th to Monday the 21st. The swell picks up, but it's coming from the ENE with a short period of only 7 to 8 seconds. Heights get up to 7.9 ft, which is big enough for the experts only, but with that short period, it's going to be messy and choppy. The wind stays cross-off but gets stronger, with fresh to strong breezes up to 25 mph. The combined energy gets high (958 to 1275), but the quality is poor. Honestly, with the strong wind and beach setup, this looks more interesting for kite surfing than paddle surfing.
Now, things start to look a bit better from Tuesday the 22nd. The swell drops back to around 4.3 ft to 4.6 ft, and the period lengthens to 10 to 11 seconds. The wind eases off, and we start seeing "expect good surf conditions" or "expect very good surf conditions" in the comments. Thursday the 24th afternoon looks like a standout. The swell is 4.6 ft from the east with a 10-second period, and the wind goes super light and cross-off, almost glassy, from the ENE at only 3 mph. The combined energy is moderate (696) but the conditions will be clean. Friday the 25th is also looking good, with similar 4.6 ft swell and a light cross-off breeze. Those two days are the best on offer, no doubt.
Short Range ForecastMostly dry. Warm (max 26°C on Sat morning, min 24°C on Sun night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 27°C on Tue afternoon, min 25°C on Tue morning). Mainly fresh winds. | ||||||||||||||||||||
Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | |||||||||||||||
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) | SW 15 | SW 16 | ENE 9 | SW 15 | SSW 15 | SW 14 | SW 23 | SW 22 | SW 21 | SW 20 | SW 19 | SSW 19 | SW 18 | SSW 18 | SSW 17 | ENE 7 | ENE 10 | SSW 18 | SSW 17 | SSW 17 | SSW 16 |
Wave Graph  | |||||||||||||||||||||
 kJ | 242 | 124 | 84 | 107 | 84 | 100 | 86 | 227 | 224 | 392 | 384 | 470 | 455 | 541 | 377 | 498 | 788 | 645 | 622 | 573 | 539 |
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 | 4:42PM0.50m | 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 | 10:27AM0.57m | 11:01PM0.21m | ||||||||
Low Tide | 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 | 7:23PM0.18m | 2:56AM0.18m | |||||||
 | |  | | | | | |  |  | | | | | | | | | | | | |
 | 6:16 | — | — | 6:16 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — |
 | — | 6:37 | — | — | 6:36 | — | — | 6:35 | — | — | 6:34 | — | — | 6:32 | — | — | 6:31 | — | — | 6:30 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 26 | 26 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 27 | 26 | 26 | 27 | 26 | 26 | 27 | 26 | 26 | 27 | 26 |
Feels °C | 26 | 25 | 26 | 26 | 25 | 24 | 25 | 24 | 24 | 26 | 27 | 26 | 24 | 25 | 25 | 24 | 25 | 25 | 25 | 26 | 24 |
Swell 1 Height (m) Direction Period (s) | ENE 10 | NE 9 | NNE 9 | NE 9 | NNE 9 | NE 9 | NE 8 | SW 22 | NNE 8 | SW 20 | SW 19 | ENE 6 | SW 18 | SSW 18 | SSW 17 | SW 16 | SW 16 | SSW 18 | ENE 9 | SSW 17 | E 8 |
| kJ | 128 | 81 | 99 | 115 | 99 | 79 | 74 | 227 | 43 | 392 | 384 | 93 | 455 | 541 | 377 | 258 | 258 | 644 | 463 | 573 | 316 |
Swell 2 Height (m) Direction Period (s) | SW 15 | ENE 10 | ENE 9 | SW 15 | SSW 15 | SW 14 | SW 14 | SW 14 | SW 21 | NNE 8 | NNE 8 | SSW 19 | SW 12 | E 10 | E 10 | SSW 20 | SSW 19 | SSE 10 | SSW 17 | SSE 9 | SSW 16 |
| kJ | 242 | 98 | 84 | 107 | 84 | 100 | 49 | 49 | 224 | 36 | 35 | 470 | 35 | 48 | 68 | 149 | 210 | 9 | 622 | 8 | 539 |
Swell 3 Height (m) Direction Period (s) | NE 8 | SW 16 | SSW 13 | ENE 9 | ENE 9 | ENE 8 | SW 23 | SSW 11 | SSW 13 | E 12 | E 12 | E 11 | WSW 8 | SW 11 | SSW 11 | SSE 11 | SW 10 | W 10 | SSE 10 | W 9 | SSE 9 |
| kJ | 74 | 124 | 68 | 26 | 25 | 14 | 86 | 12 | 68 | 46 | 68 | 58 | 6 | 31 | 12 | 11 | 4 | 2 | 9 | 6 | 15 |
Wind waves Height (m) Direction Period (s) | — | — | E 5 | E 5 | E 4 | ENE 4 | ENE 5 | NE 8 | ENE 5 | ENE 5 | ENE 6 | ENE 6 | ENE 10 | ENE 6 | ENE 7 | ENE 7 | ENE 10 | ENE 9 | — | ENE 8 | — |
| kJ | — | — | 11 | 17 | 10 | 13 | 44 | 154 | 26 | 39 | 41 | 87 | 394 | 242 | 248 | 498 | 788 | 645 | — | 385 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 1 | 1 | 2 | 30 | 0 | 1 | 31 | 1 | 1 | 1 | 1 | 30 | 38 | 41 | 30 | 41 | 47 | 30 | 32 | 31 | 1 |
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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