Rockpiles Surf Break

Lat Long: 21.28° N 157.84° W

Rockpiles Surf Forecast and Surf Report

Issued: 7 pm 05 Sep 2026 (local time)

Forecast update in  hr  min

Today's Rockpiles sea temperature is
27.2°C
0.2° 

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


Rockpiles surf forecast from 6 Sep 2026:

  • Best quality surf: Sunday 6 Sep, 11PM (local time) - 7.5ft (2.3m), 12s period, ENE swell with cross-offshore winds.
  • Most powerful swell: Tuesday 8 Sep, 2AM (local time) - 11ft (3.5m), 14s period, SW swell with 4,372 kJ wave energy.
  • Next surfable swell (1★+): Sunday 6 Sep, 11PM (local time) - 7.5ft (2.3m), 12s 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 Sunday (Sep 06) at 11PM. The primary swell is predicted to be 2.3m and 12s period with a secondary swell of 1.5m and 14s. 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 3.5m 14s and forecast to arrive on Tuesday (Sep 08) at 2AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.7m 6s period and expected on Saturday (Sep 12) at 11PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)11PM (Sun 6th Sep)7.5ft (2.3m) 12s
Best Surf11PM (Sun 6th Sep)7.5ft (2.3m) 12s
Most Powerful 2AM (Tue 8th Sep)11ft (3.5m) 14s

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


The Lowdown

Alright, pull up a seat. Rusty here, and I’ve been digging through the numbers for Rockpiles. Let’s call it how it is – it’s a tough few weeks, but there are a couple of moments you won’t want to miss.

Rockpiles is a reef slab, and the water temp is about average for this time of year. The swell energy is weak to moderate at best – we see a high of 1951 (combined energy) early on, but the wind and swell direction don’t cooperate.

The first few days are a wash. Sunday the 6th and Monday the 7th have some shoulder-high swell around 7ft to 8ft from the ENE, but the wind is cross-off or cross, and it’s all “marginal surf” with thunderstorm risks. Not worth suiting up. Tuesday the 8th is a total loss with onshore wind and poor conditions.

Things drop off hard mid-week. Wednesday the 9th bottoms out to knee-high 3ft to 3ft. Energy is weak (526 to 536). Don’t bother.

Now, Thursday the 10th through the weekend of the 12th-13th, we get a cleaner run of cross-off winds from the ENE, but the swell is small – around 4ft to 5ft. The period is short at 7 to 12 seconds, so the waves will be a bit weak and crumbly. Energy sits low (570 to 901). You could poke around for a couple of grovelly ones, but it’s nothing special.

The one real highlight is Monday the 14th afternoon. We’ve got a tiny 1ft swell, but the period jumps to a massive 22 seconds. The “expect good surf conditions” note and clean cross-off breeze (15 km/h) mean that reef is going to turn that super long-period groundswell into pristine, lined-up waves. The energy is only 339, so it’s small, but for that kind of period on a reef, you might get a handful of perfectly peeling, glassy rides. It’s a connoisseur’s session.

From the 15th all the way to the 21st, it’s a long, flat, windy stretch. Swell stays under 3ft, period is long but from the wrong direction (SW/SSW), and the ENE wind picks up to 25 mph or stronger. This setup is more interesting for kite surfing than paddle surfing. The energy climbs a bit (480 to 804) but conditions are rated as poor or marginal. Leave it.

The only true standout is that Monday 14th afternoon session at Rockpiles. It’s tiny, but the very long period groundswell on a reef with clean winds could give you a few unforgettable, silky waves.

Stay patient, Rusty.

Short Range Forecast

Heavy rain (total 30mm), heaviest during Sun night. Warm (max 27°C on Sun afternoon, min 25°C on Sat night). Mainly fresh winds.

Days 5-7 Weather Summary

Light rain (total 3mm), mostly falling on Tue night. Warm (max 27°C on Tue night, min 25°C on Wed night). Wind will be generally light.

Sunday
6
Monday
7
Tuesday
8
Wednesday
9
Thursday
10
Friday
11
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
2
2
2
3
2
3
0
0
0
2
1
2
1
1
1
2
1
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)
2.2
ENE
13
2.1
ENE
12
2
E
12
2.3
ENE
12
2.3
ENE
12
2.3
SW
14
3.5
SW
14
2.1
WSW
11
1.6
ENE
10
0.9
SSW
14
0.9
SSW
14
0.8
SSW
13
0.7
SSW
13
1.4
ENE
7
1.4
ENE
7
0.7
SW
16
1.3
ENE
12
1.5
ENE
12
1.5
ENE
11
Wave Graph
Metric surfscale
Energy kJ
1568
1240
1175
1461
1535
2247
4372
1085
530
356
269
204
176
208
186
268
461
612
531
Wind (km/h)
25
ENE
30
ENE
25
ENE
20
ENE
25
E
25
ESE
30
SE
30
S
15
S
10
SSE
15
SE
20
ENE
20
ENE
25
ENE
25
ENE
20
ENE
25
ENE
25
NE
30
ENE
Wind State
cross-off
cross-off
cross-off
cross-off
cross
cross
cross-on
on
on
cross-on
cross-on
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
High Tide
00:18AM0.21m
1:00PM0.73m
1:21AM0.26m
1:47PM0.73m
2:09AM0.32m
2:28PM0.72m
2:51AM0.39m
3:05PM0.69m
3:32AM0.45m
3:39PM0.64m
4:11AM0.50m
4:12PM0.57m
4:51AM0.54m
Low Tide
8:03PM0.13m
5:11AM0.08m
8:31PM0.10m
6:25AM0.07m
8:57PM0.08m
7:26AM0.06m
9:22PM0.06m
8:21AM0.06m
9:46PM0.05m
9:12AM0.07m
10:10PM0.04m
10:02AM0.10m
10:33PM0.04m
part cloud
part cloud
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
clear
rain showers
part cloud
part cloud
clear
part cloud
cloud
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:16
6:16
6:16
6:16
6:16
6:16
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:44
6:43
6:42
6:40
6:39
6:38
6:37
 mm
3
12
4
4
3
2
2
1
2
Temp °C
25
26
27
26
26
27
27
27
27
27
27
27
26
26
26
25
26
26
25
Feels °C
24
25
27
26
26
28
27
28
28
30
30
30
27
25
25
24
25
25
24
  • Map Icons:
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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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