
Surf Forecasts:
Rockpiles surf forecast from 18 Jul 2026:
- Most powerful swell: Saturday 25 Jul, 2AM (local time) - 8ft (2.5m), 7s period, ENE swell with 671 kJ wave energy.
Best Forecast Surf Conditions for Rockpiles this week:
The most powerful waves expected at Rockpiles in the next 16 days are 2.5m 7s and forecast to arrive on Saturday (Jul 25) at 2AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.7m 6s period and expected on Wednesday (Jul 22) at 11PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2AM (Sat 25th Jul) | 8ft (2.5m) 7s |
Table - best surf conditions forecast for Rockpiles over the next 16 days.
The Lowdown
Right then, let’s have a look at what’s on offer for Rockpiles. It’s a reef break, and the water temperature is sitting at 80°, which is about average for this time of year, so nothing weird going on there.
Honestly, the first week or so is a bit of a write-off. We’ve got a persistent cross-off wind from the ENE, blowing at 25-25 mph, and while the surf is clean in the sense of no chop, it’s not doing us any favours. The swell is on the small side, mostly under 7 ft, and the period is short, around 7-8 seconds, which means weak, crumbly waves. The combined energy is moderate but unimpressive, sitting around 500-600 (moderate wave energy). The forecasts are calling it “poor” or “marginal” pretty much right through to the end of July. There’s a brief glimmer on the morning of Monday the 20th of July, with a 3 ft swell from the south at 16 seconds, but with that strong breeze, it’s not going to be worthwhile.
The real standout, and I mean the only one worth getting excited about, is the last couple of days of July and the start of August. On Wednesday the 29th of July, the swell really kicks in. We’re looking at 15 ft on the morning, jumping to 18 ft in the afternoon, both from the ENE with a 14-second period. The combined energy is massive – 8514 and then 11067 (very strong wave energy). That is a serious amount of water moving. This is a powerful, long-period groundswell. For a reef like Rockpiles, that’s the kind of juice that can make for some awesome, heavy waves. But listen, that’s well over 8 ft, so this is strictly for experienced surfers only. Beginners, stay well away.
Then on Thursday the 30th of July, the wind drops right out. It goes from a moderate breeze to a slight air, with the morning showing 3 mph cross-off from the ENE. The swell is still a solid 12 ft, with a 11-second period, and the combined energy is 3108 (very strong wave energy). The report says “excellent surf conditions for experienced surfers.” That’s the one. That’s the window. The swell direction is ENE, which is a good match for the break’s optimum of SSE, so it should be hitting the reef with some real power and shape. The afternoon sees the swell drop to 8 ft and the wind turns a little cross, but still light. That morning is the clear winner.
After that, it tapers off. The rest of the first week of August is just back to that same old cross-off wind and small, weak swell. The window is tight, but if you’re an experienced surfer, the morning of the 30th of July is the time to be at Rockpiles.
Rusty
Short Range ForecastMostly dry. Warm (max 26°C on Sat morning, min 24°C on Sat night). Mainly strong winds. | Days 4-6 Weather SummaryMostly dry. Warm (max 26°C on Tue morning, min 24°C on Wed night). Mainly strong winds. | ||||||||||||||||||||
Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | |||||||||||||||
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 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | S 16 | S 15 | S 14 | S 14 | S 13 | ENE 7 | SSW 23 | SSW 22 | ENE 7 | E 7 | SSW 18 | ENE 7 | ENE 7 | ENE 7 |
Wave Graph | |||||||||||||||||||||
408 | 395 | 384 | 341 | 266 | 253 | 199 | 321 | 339 | 329 | 307 | 273 | 176 | 426 | 363 | 412 | 395 | 464 | 371 | 542 | 671 | |
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 | 7:11PM0.52m | 8:53AM0.38m | 7:45PM0.43m | 10:04AM0.43m | 8:19PM0.34m | 11:13AM0.49m | 8:56PM0.27m | 12:12PM0.54m | 10:06PM0.22m | 1:02PM0.59m | 11:46PM0.19m | 1:44PM0.62m | 00:59AM0.18m | ||||||||
Low Tide | 12:46PM0.16m | 2:15AM0.02m | 2:03PM0.22m | 2:48AM0.03m | 3:52PM0.27m | 3:23AM0.04m | 6:20PM0.26m | 4:02AM0.05m | 8:25PM0.21m | 9:13PM0.17m | 5:34AM0.05m | 9:41PM0.14m | |||||||||
5:58 | — | — | 5:58 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | — | 6:01 | — | — | 6:01 | — | — | |
— | 7:15 | — | — | 7:15 | — | — | 7:15 | — | — | 7:14 | — | — | 7:14 | — | — | 7:14 | — | — | 7:13 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 26 | 24 | 25 | 25 | 25 | 25 | 26 | 25 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 |
Feels °C | 22 | 22 | 21 | 22 | 22 | 23 | 24 | 24 | 24 | 25 | 24 | 23 | 22 | 22 | 22 | 22 | 21 | 22 | 23 | 22 | 22 |
Swell 1 Height (m) Direction Period (s) | SSW 13 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 12 | S 14 | S 16 | S 15 | S 14 | S 14 | S 13 | E 12 | E 11 | E 12 | SSW 20 | SSW 20 | SSW 18 | SSW 18 | SSW 17 | SSW 16 |
141 | 158 | 156 | 93 | 95 | 44 | 142 | 321 | 339 | 329 | 307 | 273 | 136 | 118 | 190 | 412 | 395 | 464 | 329 | 340 | 298 | |
Swell 2 Height (m) Direction Period (s) | WNW 13 | WNW 13 | W 12 | S 19 | S 18 | S 18 | S 16 | SW 18 | SW 16 | SW 17 | SW 16 | E 13 | S 13 | S 10 | S 13 | S 12 | S 11 | S 11 | S 12 | S 21 | S 20 |
57 | 56 | 28 | 66 | 106 | 97 | 135 | 81 | 69 | 72 | 67 | 121 | 128 | 76 | 157 | 95 | 89 | 55 | 105 | 231 | 296 | |
Swell 3 Height (m) Direction Period (s) | SW 15 | SSE 8 | SSE 9 | W 12 | NNE 8 | SW 19 | SW 18 | W 12 | E 12 | E 12 | E 11 | SW 15 | S 11 | SSW 23 | SSW 22 | SSW 16 | SW 16 | S 13 | SSW 15 | S 12 | S 12 |
55 | 7 | 7 | 25 | 13 | 92 | 83 | 11 | 12 | 25 | 39 | 60 | 57 | 426 | 363 | 100 | 127 | 85 | 89 | 71 | 73 | |
Wind waves Height (m) Direction Period (s) | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 6 | ENE 7 | E 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 |
408 | 395 | 384 | 341 | 266 | 253 | 199 | 214 | 144 | 128 | 108 | 200 | 176 | 144 | 186 | 340 | 377 | 435 | 371 | 542 | 671 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 38 | 39 | 33 | 30 | 39 | 1 | 1 | 30 | 1 | 30 | 30 | 30 | 31 | 38 | 30 | 38 | 46 | 30 | 32 | 156 | 30 |
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.










