Rockpiles Surf Break

Lat Long: 21.28° N 157.84° W

Rockpiles Surf Forecast and Surf Report

Issued: 7 am 31 Jul 2026 (local time)

Forecast update in  hr  min

Today's Rockpiles sea temperature is
26.8° 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 31 Jul 2026:

  • Best quality surf: Wednesday 5 Aug, 2AM (local time) - 4.5ft (1.3m), 10s period, ENE swell with cross-offshore winds.
  • Most powerful swell: Saturday 1 Aug, 8AM (local time) - 10ft (3.0m), 8s period, E swell with 1,142 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 5 Aug, 2AM (local time) - 4.5ft (1.3m), 10s period with ENE 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 Wednesday (Aug 05) at 2AM. The primary swell is predicted to be 1.3m and 10s period with a secondary swell of 0.5m and 11s. 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 3.0m 8s and forecast to arrive on Saturday (Aug 01) at 8AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 6s period and expected on Thursday (Aug 06) at 8AM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 2AM (Wed 5th Aug)4.5ft (1.3m) 10s
Best Surf 2AM (Wed 5th Aug)4.5ft (1.3m) 10s
Most Powerful 8AM (Sat 1st Aug)10ft (3.0m) 8s

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


The Lowdown

Alright folks, Rusty here. Let’s cut through the data and talk about the waves coming up for Rockpiles. This is a reef setup, and it’s fairly consistent, but it’s not going to be a week for the faint of heart.

The water’s sitting at about 80.2°, which is pretty much what you’d expect for this time of year, so no surprises there.

The outlook kicks off on Friday, July 31, and honestly, it’s a tough start. We’ve got a solid 6.6ft swell from the east, but the wind is a stiff 25 mph cross-off, and the energy is ripping at 918 (moderate). The wave period is a short 7 seconds, so it’s a bit of a messy, wind-affected affair. The surf is too big for beginners at 5ft+, but it’s also not clean enough to be great. The morning is a write-off, and the afternoon is only marginally better. Not the day to paddle out.

Saturday, August 1, is worse. The swell jumps to 9.8ft from the east, wind is 28 mph, and the energy is a massive 1311 (strong). That’s expert territory only, and the period is still short at 8 seconds. The wind is a cross-off breeze, so the waves are going to be blown out. Sunday, August 2, is similar, with 7.9ft swell and 25 mph wind. The pattern holds through Monday, August 3, with 5.6ft swell and the wind easing slightly, but it’s still rough.

Now, Tuesday, August 4, is a glimmer. The swell drops to 5.2ft from the ENE, the wind is down to 12 mph, and the period stretches to 11 seconds. That’s a longer period groundswell, which means better shaped waves with more energy. The combined energy is 654 (moderate). The wind is still cross-off, so it won’t be glassy, but the conditions are marginal rather than terrible. This is the best of a bad bunch for the first week. It’s still not a standout, but if you’re desperate, Tuesday morning is your shot.

From Wednesday, August 5, onwards, things get smaller. The swell drops to 3.9ft, and the period goes back to 9 seconds. The wind stays moderate, and the energy fades off. The 6th of August sees a tiny 1.3ft swell from the SSW with a 14-second period, but the energy is a weak 152. The wind is still 19 mph. It’s just not doing anything.

We hit a real gap here. From Thursday, August 6, through to Monday, August 10, the surf is either poor or marginal. The energy stays low, and the wind is a problem. The 9th of August has a 5.9ft swell in the morning, but the wind is still 16 mph, and the period is a short 7 seconds. The afternoon flips to a 2.3ft SSW swell at 18 seconds, but again, the wind is 19 mph. The long period means it’s better for the reef break, but it’s not a session to write home about.

The real standout, and the only true highlight I’d call, is Wednesday, August 12. The swell is a modest 3.3ft from the south, but the period is a very long 17 seconds. The energy is 888 (moderate), and the wind is a light 16 mph cross-off. This is a classic groundswell, and it’s going to wrap into the reef with some real power. The wave shape will be excellent, with long, clean lines. The wind is moderate, but it’s a cross-off, so the face should be clean. This is the best on offer in the whole 16-day window. It’s a point break and reef setup, so that long period will work in its favour.

Thursday, August 13, is also promising. The swell is 3.6ft from the south, still a 16-second period, and the wind is a light 6 mph cross-shore. The morning has a bit of light cross-shore ripple, which is fine. The afternoon is cleaner with a 9 mph cross-off. The energy is 709 (moderate). This is a solid second option.

After that, the swell fades. Friday, August 14, drops to 3.0ft, and the wind picks up. Saturday, August 15, is a total write-off, with the wind hitting 22 mph again and the swell shifting to a short-period 8.2ft from the SW. That’s a messy, windy wall of water for experts only.

In short, the first week is a battle with the wind. The second week, particularly August 12 and 13, is where you want to be. The long-period south swell will deliver. Don’t bother before that unless you’re just desperate for a paddle.

Short Range Forecast

Mostly dry. Warm (max 27°C on Fri morning, min 24°C on Sun night). Winds decreasing (strong winds from the ENE on Fri night, moderate winds from the NE by Sun night).

Days 4-6 Weather Summary

Mostly dry. Warm (max 27°C on Wed morning, min 25°C on Mon morning). Mainly fresh winds.

Friday
31
Saturday
1
Sunday
2
Monday
3
Tuesday
4
Wednesday
5
Thursday
6
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
1
1
0
1
1
1
0
1
1
0
2
2
2
2
1
0
1
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2
E
7
2.2
E
7
3
E
8
3
E
8
2.5
ENE
8
3
ENE
8
2.4
ENE
8
2.2
ENE
8
2.1
ENE
8
1.7
ENE
8
1.5
ENE
8
1.6
ENE
12
1.6
ENE
11
1.4
ENE
11
1.3
ENE
10
1.2
ENE
9
1.2
ENE
9
1.1
ENE
8
0.4
SSW
14
1.2
ENE
7
1.5
ENE
6
Wave Graph
Metric surfscale
Energy kJ
400
537
1102
1142
871
1026
801
662
560
404
321
713
582
436
331
253
218
157
82
153
172
Wind (km/h)
40
ENE
40
ENE
45
ENE
45
ENE
40
ENE
40
ENE
40
ENE
35
ENE
30
ENE
25
ENE
30
NE
20
ENE
20
ENE
20
NE
15
NE
20
ENE
25
ENE
20
ENE
30
ENE
30
ENE
30
ENE
Wind State
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
5:26PM0.64m
5:57AM0.34m
5:55PM0.59m
6:49AM0.38m
6:24PM0.52m
7:47AM0.42m
6:55PM0.44m
8:56AM0.47m
7:27PM0.36m
10:11AM0.53m
8:07PM0.29m
11:24AM0.60m
9:30PM0.22m
Low Tide
10:29AM0.06m
00:22AM0.06m
11:14AM0.11m
00:48AM0.05m
12:06PM0.16m
1:15AM0.04m
1:14PM0.22m
1:46AM0.04m
2:52PM0.27m
2:23AM0.03m
5:19PM0.27m
3:10AM0.03m
7:39PM0.21m
4:08AM0.02m
clear
clear
part cloud
clear
clear
clear
clear
clear
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
cloud
cloud
light rain
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:03
6:03
6:05
6:05
6:05
6:05
6:05
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:09
7:09
7:08
7:08
7:07
7:07
7:07
 mm
1
Temp °C
27
26
25
25
26
25
26
26
25
25
26
25
26
26
25
27
27
26
26
25
25
Feels °C
24
22
21
20
21
22
23
22
22
24
24
23
27
26
25
27
26
27
24
23
24
  • Map Icons:
  • Break
  • 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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