Surf Forecasts:
Rockpiles surf forecast from 25 Aug 2026:
- Most powerful swell: Thursday 27 Aug, 11AM (local time) - 3.5ft (1.1m), 17s period, S swell with 716 kJ wave energy.
Best Forecast Surf Conditions for Rockpiles this week:
The most powerful waves expected at Rockpiles in the next 16 days are 1.1m 17s and forecast to arrive on Thursday (Aug 27) at 11AM. 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 Friday (Aug 28) at 8PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11AM (Thu 27th Aug) | 3.5ft (1.1m) 17s |
Table - best surf conditions forecast for Rockpiles over the next 16 days.
The Lowdown
Alright, Rusty here, and let’s break it down.
We’ve got just one spot firing up in the 16-day window: Rockpiles. It’s an advanced reef break, exposed, and fairly consistent. The water is sitting at 81°, which is normal for this time of year, so no weirdness there.
The run starts on Monday the 24th of August, and it’s a rough go. Swell is 5 ft from the east, but the period is a weak 7 seconds, and the wind is a stiff 12 mph cross-offshore. The energy is moderate (472), and it’s only a marginal call. The next few days are a slog. Tuesday the 25th and Wednesday the 26th are hammered by strong winds and messy conditions. There’s a short-lived pulse on Wednesday afternoon with a 2 ft south swell packing a very long 18-second period, and energy jumps (599), but fresh cross-off winds keep it marginal. Thursday the 27th through Saturday the 29th are all wind and poor surf. The ENE wind is relentless at 19 to 25 mph.
Now, hang in there. Monday the 31st of August sees the swell pump up to 8 ft from the ENE, with a better 8-second period, and the energy is strong (876 in the morning, hitting 1003 in the afternoon). The wind is still cross-off but lighter at 19 mph. That’s the biggest swell, but at 8 ft, it’s expert territory. The wind is still a factor.
The real standout is Monday the 7th of September. The wind drops to a gentle breeze of 9 mph in the morning and a light breeze of 6 mph in the afternoon. The swell is a solid 5 ft from the ENE, with a 9-second period, and the energy is moderate (685 and 617). The conditions are “very good,” and the wind is cross-off, keeping it glassy. Crowds are “sometimes,” so you might share a few waves, but it’s worth it. For a reef, that period is solid, and it’ll shape up nicely.
Before that, the 5th and 6th of September bring some weird weather – heavy rain and thunderstorms – but the swell is around 5 ft with a 12-second period, and the energy is strong (over 1000). The wind is mostly cross-off, but the 5th afternoon is a bit lumpy. The 6th is cleaner with a moderate breeze.
The last days, the 8th of September, the wind swings onshore from the SE, which isn’t ideal for Rockpiles. The swell stays around 5 ft, but the period is still 9 seconds, and the energy is moderate. The wind is light, but it’s onshore, so expect some chop.
Bottom line: a lot of wind and marginal surf, but that Monday the 7th of September is your ticket. If you’re an advanced surfer, that’s the day. For the rest, you’re fighting the breeze. The reef setup here loves the long-period swells we get, but the wind is the main story most days.
Rusty, out.
Short Range ForecastMostly dry. Warm (max 27°C on Mon afternoon, min 25°C on Mon night). Mainly strong winds. | Days 5-7 Weather SummaryMostly dry. Warm (max 26°C on Thu afternoon, min 25°C on Thu night). Mainly strong winds. | |||||||||||||||||||
Mon 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | ||||||||||||||
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) | E 7 | ENE 8 | E 7 | ENE 7 | E 7 | SSW 14 | S 18 | S 19 | S 17 | S 16 | S 16 | S 14 | S 14 | S 13 | E 14 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 |
Wave Graph | ||||||||||||||||||||
269 | 251 | 345 | 261 | 274 | 218 | 307 | 351 | 716 | 427 | 582 | 260 | 329 | 229 | 201 | 230 | 230 | 186 | 198 | 262 | |
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 |
High Tide | 2:26PM0.67m | 2:21AM0.29m | 2:56PM0.68m | 2:55AM0.33m | 3:24PM0.68m | 3:31AM0.37m | 3:53PM0.66m | 4:08AM0.41m | 4:20PM0.62m | 4:47AM0.46m | 4:49PM0.57m | 5:30AM0.50m | 5:18PM0.51m | |||||||
Low Tide | 9:35PM0.13m | 7:43AM0.06m | 9:53PM0.11m | 8:24AM0.05m | 10:12PM0.10m | 9:05AM0.06m | 10:32PM0.08m | 9:46AM0.07m | 10:54PM0.07m | 10:31AM0.10m | 11:17PM0.05m | 11:22AM0.14m | 11:42PM0.05m | |||||||
— | — | 6:11 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | |
6:53 | — | — | 6:52 | — | — | 6:52 | — | — | 6:52 | — | — | 6:51 | — | — | 6:50 | — | — | 6:49 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 27 | 26 | 26 | 26 | 26 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 25 | 26 | 25 | 26 | 26 | 26 |
Feels °C | 26 | 26 | 23 | 22 | 24 | 22 | 23 | 22 | 24 | 24 | 24 | 23 | 23 | 22 | 23 | 22 | 22 | 23 | 23 | 25 |
Swell 1 Height (m) Direction Period (s) | E 7 | SSW 13 | SSW 12 | SSW 16 | SSW 15 | SSW 14 | S 18 | S 19 | S 17 | S 16 | S 16 | S 14 | S 14 | S 13 | E 14 | E 13 | E 12 | E 12 | E 11 | SSW 15 |
269 | 127 | 85 | 142 | 121 | 215 | 307 | 351 | 716 | 427 | 582 | 260 | 329 | 229 | 184 | 222 | 108 | 103 | 93 | 199 | |
Swell 2 Height (m) Direction Period (s) | SSW 13 | SSE 7 | SSW 16 | SSW 12 | SSW 12 | S 18 | SSW 13 | SSW 13 | NNE 8 | SSW 12 | NNE 7 | E 16 | E 15 | E 14 | S 13 | S 13 | S 12 | SSW 16 | SSW 16 | S 11 |
156 | 20 | 146 | 81 | 81 | 165 | 135 | 137 | 7 | 47 | 10 | 78 | 109 | 198 | 85 | 89 | 102 | 171 | 162 | 58 | |
Swell 3 Height (m) Direction Period (s) | SSE 12 | SSE 12 | SSE 12 | SSE 6 | SSW 18 | SSE 12 | SSE 6 | SSW 16 | WNW 10 | NNE 8 | E 17 | SSW 11 | SSW 19 | SW 19 | S 13 | S 12 | SSW 17 | S 12 | S 12 | E 11 |
47 | 46 | 29 | 8 | 109 | 27 | 6 | 50 | 9 | 6 | 24 | 22 | 36 | 56 | 89 | 75 | 188 | 68 | 69 | 59 | |
Wind waves Height (m) Direction Period (s) | — | ENE 8 | E 7 | ENE 7 | E 7 | ENE 6 | ENE 6 | E 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 |
— | 251 | 345 | 261 | 274 | 218 | 151 | 194 | 150 | 131 | 112 | 117 | 186 | 207 | 201 | 230 | 230 | 186 | 198 | 262 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 38 | 30 | 38 | 38 | 30 | 38 | 33 | 1 | 30 | 127 | 1 | 31 | 33 | 30 | 38 | 38 | 30 | 30 | 39 | 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.











