Rockpiles Surf Break

Lat Long: 21.28° N 157.84° W

Rockpiles Surf Forecast and Surf Report

Issued: 7 pm 16 Aug 2026 (local time)

Forecast update in  hr  min

Today's Rockpiles sea temperature is
27.1° C
0.4° 

Rockpiles surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Rockpiles surf forecast from 17 Aug 2026:

  • Best quality surf: Thursday 20 Aug, 2PM (local time) - 2ft (0.6m), 18s period, SSW swell with cross-offshore winds.
  • Most powerful swell: Monday 17 Aug, 2AM (local time) - 6ft (1.8m), 8s period, ENE swell with 418 kJ wave energy.
  • Next surfable swell (1★+): Thursday 20 Aug, 2PM (local time) - 2ft (0.6m), 18s period with SSW 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 Thursday (Aug 20) at 2PM. The primary swell is predicted to be 0.6m and 18s period with a secondary swell of 0.7m and 8s. 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 1.8m 8s and forecast to arrive on Monday (Aug 17) at 2AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 6s period and expected on Wednesday (Aug 19) at 5AM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 2PM (Thu 20th Aug)2ft (0.6m) 18s
Best Surf 2PM (Thu 20th Aug)2ft (0.6m) 18s
Most Powerful 2AM (Mon 17th Aug)6ft (1.8m) 8s

Table - best surf conditions forecast for Rockpiles over the next 16 days.


The Lowdown

Alright, mate, Rusty here. Let’s have a look at what’s on the cards for the next couple of weeks.

Right off the bat, I gotta be straight with you – the first week is a tough one. We’ve got a fair bit of onshore wind and the swell is mostly short-period, wind-driven stuff. The water temp is sitting around average for this time of year, so nothing wild there. The real standout, and the only spot I’d even bother paddling out at, is Rockpiles. It’s a reef break, exposed to the SSE swell, which is a good thing. The best action looks to be from Thursday afternoon, 20th August, through to Saturday morning, 22nd August. We’ve got a solid S/SW groundswell rolling in, with a long period of 16 to 18 seconds. That means proper energy and shape – the combined energy is moderate (around 254 to 405). The wind is a light cross-off or cross-shore, keeping things clean. On Thursday afternoon, the swell is around 2ft from the SSW, but with that long period, it’ll pack a punch. It’s small, but it’ll be lined up. Friday and Saturday mornings look even better, with the swell nudging up to 2ft, same direction, and the wind easing off to a light breeze. Crowds are possible, so get in early.

Now, after that Saturday morning session, the quality drops off a cliff. From Sunday, 23rd August, we’ve got a run of poor surf – the wind swings back to a fresh ENE breeze, and the swell becomes a short-period, lumpy ENE windswell. This is a 4-day gap of nothing worth writing home about. The combined energy drops, and we’re looking at messy, blown-out conditions.

Then, from Wednesday, 26th August, things get interesting again, but this is for the *advanced crew only*. The swell builds rapidly, hitting 8ft on Wednesday, then 10ft from Thursday, 27th August, through to Saturday, 29th August. That’s serious size – over 8ft is expert territory. The swell direction is ENE, and the period stays short at 8 seconds, so it’s not the cleanest groundswell. The combined energy jumps into the strong range (1298 to 2697). The wind is a cross-off, but it’s a fresh 15 to 19 mph, keeping the surface bumpy. This is big, raw, wind-affected surf. Not for the faint-hearted.

By Saturday afternoon, 29th August, the swell drops back down to 3ft, and conditions turn poor again. The final week is a mixed bag of short-period windswell and some better SSW pulses, but nothing that really screams “paddle out.”

The Best Bet: If you’re a confident surfer, the Thursday 20th to Saturday 22nd August window is the pick – small but clean, with long-period groundswell at Rockpiles. For the big wave hunters, the 27th to 29th August is a serious, heavy swell window, but it’s raw and rough.

Stay safe out there.

Rusty.

Short Range Forecast

Light rain (total 3mm), mostly falling on Sun night. Warm (max 26°C on Sun night, min 24°C on Mon night). Mainly fresh winds.

Days 5-7 Weather Summary

Mostly dry. Warm (max 27°C on Sat morning, min 24°C on Thu night). Wind will be generally light.

Monday
17
Tuesday
18
Wednesday
19
Thursday
20
Friday
21
Saturday
22
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
1
1
0
0
0
1
1
1
0
1
2
2
1
2
1
2
1
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.8
ENE
8
0.9
S
14
0.8
S
14
1.3
ENE
7
1.3
ENE
7
1.2
ENE
7
1.1
ENE
8
1
E
8
0.8
E
8
0.5
SW
16
0.6
SSW
18
0.6
SSW
17
0.7
SW
16
0.7
SW
17
0.7
SW
16
0.8
SSW
16
0.7
SW
16
0.7
SW
16
0.7
SSW
16
Wave Graph
Metric surfscale
Energy kJ
418
334
260
170
141
147
147
137
100
129
207
200
274
291
264
322
261
255
212
Wind (km/h)
20
E
30
ENE
25
ENE
25
ENE
30
ENE
25
ENE
25
ENE
20
ENE
20
ENE
20
NE
15
ENE
15
ENE
10
NE
10
E
15
E
20
NE
15
E
20
ENE
20
NE
Wind State
cross
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
cross-off
cross-off
cross-off
cross-off
cross-off
High Tide
7:54AM0.49m
6:52PM0.37m
8:59AM0.51m
7:16PM0.30m
10:13AM0.53m
11:25AM0.56m
10:11PM0.21m
12:25PM0.59m
00:08AM0.21m
1:12PM0.63m
1:06AM0.23m
Low Tide
00:58AM0.06m
1:59PM0.25m
1:27AM0.08m
3:56PM0.27m
2:01AM0.10m
2:47AM0.12m
8:27PM0.20m
8:41PM0.17m
5:06AM0.12m
9:00PM0.16m
thunderstorm
part cloud
part cloud
part cloud
clear
clear
part cloud
part cloud
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:09
6:09
6:11
6:11
6:11
6:11
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:00
7:00
6:59
6:58
6:57
6:57
6:55
 mm
3
Temp °C
26
25
25
25
25
26
25
25
26
25
26
26
26
26
26
26
27
27
26
Feels °C
27
26
24
24
23
24
25
24
26
26
27
27
28
28
28
29
29
27
26
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  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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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